T.R | Title | User | Personal Name | Date | Lines |
---|
320.1 | | SPKALI::THOMAS | | Thu Oct 01 1987 08:33 | 7 |
|
If you really must have the slats I would think that a mercury
switch could be used to actuate a servo. The landing gear can be
done using air retracts and two air valves. one actuated by a servo
and the second by a switch actuated by the retracting mains.
Tom
|
320.2 | | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Thu Oct 01 1987 10:06 | 6 |
| re slats: Ya, that could be done...The only snag is that on the
proto, their deployment was determined by airspeed, not the pilot.
They are used to generate extra lift.
md
|
320.3 | Auto Slots/Slats | TONTO::SCHRADER | | Thu Oct 01 1987 10:41 | 27 |
| RE: .0
> 1. The wing was designed with AUTOMATIC leading edge slots that
> extend at low speed or during a climb. Messerschmidt has bought
> the license right for this device from Handley-Page and used also
> on the Bf 109. It'd be real cute if this device could implemented
> on the model.. Anyone got any ideas on how it works on full size
> planes and how it could be made to work on a model ???
This sounds NEAT! A mercury switch wouldn't work. The mercury will slop around
due to normal in-flight accelerations/decelerations and cause the slats to
extend/retract erratically. What the slats do is to delay the stall so that the
wing can work at a higher angle of attack. Since the elevator controls the
angle of attack and the wing stalls at a given angle of attack ... use a cam
(or whatever) on your elevator servo (hitting a switch to control another
servo??) to make the slats extend somewhere between the level flight and
stalled elevator positions. In level flight the slats will be retracted. During
either a hard turn/pull-up or when you slow down to land the change in elevator
position will cause the slats to extend. Don't know of anybody who's tried
this but it sounds like it will work.
I seem to recall that the full-scale auto slats worked by reacting to changes
in the air pressure difference between the top and bottom of the wing.
The wing loading on our models is so light that there may not be enough
of a pressure difference to make them work like the original.
G Schrader
|
320.4 | EASY DISCIPLINE & ACTUATION FOR SLATS | WINERY::HUFF | | Thu Oct 01 1987 14:47 | 35 |
| Their are many ways to actuate/activate a device such as SLATS on
a model, but remember what the original intent was and the problems
that occurred because of them and, perhaps, the answer becomes more
obvious. Probably the most famous use of the SLAT was in the F-86
fighter of KOREAN WAR fame. The AIR FORCE wanted an aircraft that
could move out fast and furious and still have decent TAKEOFF and
LANDING characteristics, i.e., low airspeed lift offs and landings
with subsequent use of short runways, and ability to lift heavy
loads at takeoff, fuel tanks, lots of ammo, etc. The SLAT fit the
bill nicely, EXCEPT.........! The F-86 SLATS were aerodynamically
actuated; LOW AIRSPEEE equals SLATS DEPLOYED; great for take off
and landing, but YOU WERE A SITTING DUCK for a MIG-15 if you tried
CLIMBING with him or TIGHT TURNING with him. In these cases, when
airspeed bled off, the SLATS would AUTOMATICALLY DEPLOY, suddenly
putting the anchor out and the F-86 would come to a stop! The MIG
could now pick off the F-86 at will. The only recourse for the SABRE
pilot was to immediately dive to get airspeed back up so the SLATS
would retract; no dive, no airspeed, no SABRE! Darn hard to dive
when you might already be right on the deck. The SABRE pilots had
to be very careful that this "Great, automatic device: didn't kill
them in combat. In KOREA, there was the idea that mechanical pins
should be actuated by the pilots after takeoff SLAT retraction to
"HARD-WIRE" the SLAT to a retracted position. This KLUGE didn't
work and the final answer to the problem was to bring to KOREA a
"HARD WING" F-86; IT HAD NO SLATS AT ALL IN IT'S WING!
The answer to this problem, both for real airplanes and models is
to MECHANICALLY ACTUATE THE SLATS by DIRECT LINKING WITH THE FLAPS;
FLAPS DOWN FOR TAKEOFF AND LANDING - SLATS DEPLOYED FOR EXTRA LIFT
FOR TAKEOFF AND LANDING! Look at ART JOHNSON'S F-100D in RCM; I
believe that's what he does. The reason that he modeled this "DASH
MODEL" of the 100 is that the F-100A and C did NOT have FLAPS; the
"D" model DID! The only real place you NEED all that extra lift
is for takeoff and landing and, perhaps, for slow flybys.
|
320.5 | "CONTROL'S" THE NAME OF THE GAME... | GHANI::CASEYA | THE DESERT RAT RC-AV8R | Thu Oct 01 1987 16:17 | 17 |
| I couldn't agree more with -.4. This aircraft is going to be com-
plicated and treacherous enough "without" some automatic (pronounced:
un-controlled) device which might very easily deploy at "just" the
wrong time and spill ya'!
I agree that, if you feel you absolutely "must" have slats, put
them on an auxilliary channel where "you" can select when to use
them and how much you want to use. Linking them to the flaps "sounds"
reasonable but I think I'd still prefer to be able to "control"
the "when and how much" as opposed to being locked in by another
function.
I still hope you're approaching this project from a "5-years in
the future" sort of perspective and plan to get yer'self LOTS of
jet experience in the interim.
Adios, Al
|
320.6 | ME262 kit and poster | RDGENG::NODDLE | anything will fly given the power... | Fri Oct 02 1987 08:59 | 21 |
| Hello Marc,
Just as an aside, I noticed in one of the recent RC mags over here
a report on a model show somewhere in Germany. One of the 'planes
on display was a kit of a ducted fan ME262. There were precious
little details, but I can try and dig out a bit more if you want...
In the same vein, I'm pretty sure I have a three-quarter view, cut-away
poster of a ME262 some where at home. I'd be happy to send it over
to you via "snail mail" if you'd like a look at it. If you do, let
me have your mail stop. Snail-mail is taking about 2 weeks from
the UK to the US I understand, so it may be a while before you get
it!
I'm still at the "re-learning to fly" stage (10 year layoff), but this
project sounds great (I drew some rough plans of a ME262 from an Airfix
1/72 plastic kit once upon a time) and certainly stikes a sympathetic
chord with me! I wish you all the luck you need. Keep us posted with
the results.
Keith.
|
320.7 | YAYAYAYA.... plz look into it | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Fri Oct 02 1987 10:13 | 16 |
| Keith, I'll take anything you can dig up. A kit would be a good
way to go. If you dig up the mag trygetting in touch with the guy
that wrote the article or the editor. You may get a pointer to the
guy who organized the show....etc..
I'd love to see a poster.. I got a book written by one of the guys
who worked on the restoration of the Me-262 at the National Air
& Science museum in Washington. It had a double page spread cutaway
and a couple of rather detailed blueprints(detailed enouhg to give
wing airfoil measurments relative to wing chord).
Im givng serious thought in attempting to digitize the plans I get
into a Mechanical CAD program. (we have a demo place right he in
MRO). That way, if I have to diddle, life is lot easier.
md
|
320.8 | A bit more info. | RDGENG::NODDLE | Keith Noddle REO2-G/D8 830-3953 | Mon Oct 05 1987 10:42 | 19 |
| Marc,
I'll dig out the poster and send it on. I haven't checked into the kit
yet, but will do in the near future. I contacted Dennis Bryant who is a
respected scale modeller and designer here in the UK (do you design
scale models??) about ME262 plans. He doesn't do a set and doesn't know
of anyone else who does. Looks like I'm going to draw a blank on the
plans side. However, one glimmer of hope is that the Areomodeller Plans
Service do scale drawing sets with various amount of detail about the
subject and they do have drwaings of the ME262. If you like, I can look
into that one too.
Keep the details coming! The way my enthusiam is being whetted,
I'll be looking for some plans myself soon!! (not until I've sorted
one or two problems however - see 321.0)
CU,
Keith.
|
320.9 | There is a model plan. | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Mon Oct 05 1987 12:57 | 54 |
| You can plans from a German publisher:
Verlag Fur Technik & Handwerk
Postfach 1128
7570 Baden-Baden
Germany tel 011 49 44 71 826 34
Attn: Herr Weicking
Plan # MT 358 Price 39 marks + 5 marks handling
Scale: 1/6.2
Wing airfoil is half-symmetrical. Designed for propellers. Engine
size 1,4-2,6 HP. Other details on model are in .1
I've gotten in touch with Mr Weicking & he sez that modifying
the plans for ducted fan would easy. I'm trying to get them
to do the mods for me (preferably at their expense).
He mentioned to me that a pair of fans generating each 3.5 -
4 Kp (I think he meant Kg) of thrust would OK. A Kress 740
or an Dynamax 003 with a .45 would apparently do the trick).
This last statement was however contradicted by stating that
mods would be done for a fan with a 65-80 motor.
Oh yes, the model is designed for the following:
Throttle
Rudder
Elevator
Ailerons
Retracts
Apparently Flaps can be also installed.
No mention of the Slats.
(That's 7 channels so far. ). I think I'd also consider brakes
so that the engines can revved up on take-off.
No. I don't do plans. I'd rather build. I have a sneeaky suspicion
I may have to do substantial work on the wing if I want slats
and flaps... BTW, the airfoil on the proto is symmetrical.
AT the moment, my thinking is to build the model as the plans
calls for. Then look into redoing the wing so that it's closer
to the proto.
md
|
320.10 | | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Mon Oct 05 1987 13:01 | 9 |
| re .-2 and Aeromedeller Plan Service: Is that the same stuff that
Argus Pubs advertives in RCM&E. If so, I'm already getting what
they have (Me-262 A-1a). If not, more details pls...
BTW, if you know anyone in Germany, ou may want to see what they
can glean from german language modeller press. My german has almost
20 years of rust on it but I think I could deal with that.
md
|
320.11 | Gentlemen, Sync those engines !! | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Mon Oct 05 1987 14:11 | 26 |
| Seen in Model Aviation, Nev 87 issue, p 185:
Twin Sync System: Maintains perfect sync of engines over entire
RPM range. Use two servos (but only needs 1 channel).
Ok, so how does it work: Two magnets are mounted on the spinner
of the engines. Use Hall effect sensors and a comparator, one engine
is defined as the master, the other as the slave. The comparator
adjusts the throttle of the slave using the master as a reference.
(from a quick conversation with the guy who designed & sell this
garget)... Cost: 67$.
There is a ducted fan version that uses a optical sensor instea
of a magnet.. That's 10$ extra.. Been on the market for at least
4 years..
ANyone care to commment on what kind of grief (if any) is likely
to come from installing such a device .
I can see on big benefit: The RPM on both engines is gooing to be
the same. Also, is the master cuts out, the slave is going to do
same. (nice safety feature to prevent the dive that Al described)
md
|
320.12 | Retract Sequencer | MJOVAX::BENSON | | Mon Oct 05 1987 15:02 | 3 |
| Seems to me that Byron has a sequencing system for retracts that
is used on one of their jets.
|
320.13 | Question on Engine Sync System | LEDS::WATT | | Mon Oct 05 1987 16:51 | 2 |
| What do you do when the slave cuts out?
|
320.14 | Pray, mostly... | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Mon Oct 05 1987 17:29 | 15 |
| Work like hell to save the plane...
The ME262 1:1 was controllable by jusdiscious use of the rudder
to compensate for the thrust moment so far out on the wing.
(this i got from reading flight reports/instructions from german
and allied pilots. Probably easier said than done)
My guess is one would want to throttle back in a hurry and
basically "dead stick" it down. Premise here is that the plane has
the ground clearance and a flying attitude that will permit that.
Otherwise, you end up doing the same thing the 1:1 version did:
Crash due to uncontrollable dive..
md
|
320.15 | | AKOV11::CAVANAGH | We don't need no stinkin badges! | Tue Oct 06 1987 10:21 | 12 |
|
> What do you do when the slave cuts out?
It was entered as 'when the master cuts out'...
When/if the 'master' engine fails (out of gas, stall...), the slave
engine will also stop (IE: you are in for a dead stick landing).
|
320.16 | Every little bit helps | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Tue Oct 06 1987 10:51 | 6 |
| Yup.. Master goes and slave goes also and you dead stick. The good
thing is that is the slave goes, you *know* which engine is still
running and therefore hopefull will have the time/airspace to
react appropriately.
md
|
320.17 | more on motor sync toy | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Tue Oct 13 1987 10:44 | 15 |
| Got more info in the mail about the motor sync gadget.
Seems if the master quits, it uncouples the slave so you get at
least one engine. This leaves the pilot to guess which one is dead.
I'll have to investigate if it is possible to modify the thing to
behave the way I would "like" it too: If master quits, you dead
stick (ie slave quits too). If slave quits, you still have the master
available and get to work some to get the plane back on the ground
in one piece
BTW, there a 4 motor version available
md
|
320.18 | weight budget | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Tue Oct 13 1987 11:04 | 34 |
| Al's comment in an other note about fuel consumption got me thinking
about some of the weight budget.
OK, so we have two engines & fan. I figure about 16 oz apiece.
You also have to allow for fuel. Figure two tanks (placement probably
for & aft of the cokpit, like the proto) each 16 oz capacity. That's
another 32 oz in weight. Now we have the flight pack (servos, battery
pack, Rx).
Figure a potential for eight channels.(rudder:1 servo,
elevator: 1 servo. throttle: 2 servos. flaps: 1 servo. ailerons:
1, maybe 2 servos, retracts: 1 servo, Slats: 1 servo. Brakes:
1 servo. These last two option will probably left out but one
should plan for it anyway). Count on 2 battery packs to service
all that. Figure 40 oz. (For those who wonder whether this will
all fit, let me mention the the fuse is about 10 inches in diam
at the cokpit). That gives about 4- 4.5 lbs and still no airframe.
Count on at least 10 pounds for the airframe. Now this subject
(airframe) brings to mind what materials to use. I got a recommendation
to use Carbon fiber 'cause this plane is going to be able to hit
150 mph with no problem. Thing need to be rigid to hand the stresses.
I can see more $$$$ flying away.
I would tend towards wood (ply for formers, balsa for sheeting..)
(i know how deal with that. Carbon fiber would entirely new to me)
Anyone got any input on this ??
tx,
md
|
320.19 | Bingo !!.... Pay dirt | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Tue Dec 01 1987 10:44 | 56 |
| After some old gumshoe work & a tip, I now have hard info on a ME-262
ducted fan kit.
I got a note from Tom Sprecher telling me that he had run across
a "how to do it" mag on ducted fans. In this mag, there was was
a reference to a ME-262 kit. I got him to get me a copy of the mag
(after appropriate cajoling & offers of suds money).
As mentioned previously, a company called Air Flair builds such
a kit. Now I was a bit concerned 'cause the mag said the info
on ducted fan kit manufacturer went back to 1981. The mag also
mentioned the model had been designed by one Tom Cook (shown in
the mag with a nice F4 Phantom).
hey, what the hell, so I fired off a letter (the address listed
is in Kansas City) since ATT has no phone number under that name.
Last night, I got home and had this letter waiting for me containing
kit complete specs:
Scale: 2" = 1' - wingspan: 84", fuse length:69"
Flying weight: 15 - 19 lbs (15 optimum)
Power: Dynamax unit with .60 size engine
Kit contains:
- fiber glass fuse with molded vertical stab
- left & right engine nacelle matche to wing plan form
- 2 cowlings & cowling liners (fiberglass)
- 2 DF tail pipe
(All part made of polyester resin & 2 layers FG cloth)
- .40 canopy
- 3 sheets (36X48) full size plans. Shown on plan are all ribs
dihedral braces, bulkheads, bellcrank mountlayout for flaps,
ailerons. Engines, & detail drawing of landing gear doors,
etc.
- 2 sheets factory drawing package, one sheet showing camouflage
layout.
- 3 sheets of stencil layouts
Price: $295. shipped vie freight line collect.
All wood parts for wing, rudder, stab etc not included in kit !!!
I tyhnk I'm going to try to buy the plans only, so I can get an
idea of what I'm getting into !!
Oh! Almost forgot the address:
Air Flair Mfg Co.
Box 11702,
Kansas City, MO, 64138
tel: 816 353 7854
(BTW, there is an other Air Flair Co in the model plane business.
They are located in Fairborn OH. See ad on page 4 of RCM, Jan 88)
|
320.20 | "WHERE ANGELS FEAR TO TREAD"...... | GHANI::CASEYA | THE DESERT RAT (I-RC-AV8) | Tue Dec 01 1987 14:06 | 30 |
| Marc,
Please believe that my purpose for reiterating the following statement
is not to discourage you but to, again, urge the utmost caution
in approaching the ME-262 project. Like you, I've always been
fascinated by the -262 and count it among my all-time favorite WW-II
aircraft but I'll never build one. The large investment of time/
effort/expense versus the high potential for losing the ship to
the deadly assymetric thrust of an engine-out situation simply cannot
be balanced in my personal ledger...and that's with considerable
twin recip-engine time in my R/C log book.
I applaud yer' dedication and wish you ultimate success pursuing
the -262 project. I feel I'd be less than open with you if I didn't
offer for your consideration the fact that Tom Cook discontinued
personally kitting the -262 after losing 3-consecutive Masters-quality
ME's to the dreaded assymetric thrust syndrome. On the occasion
of our first meeting, I asked Tom about the -262 as I was interested
in it myself and he warned me off saying that if it "ever" became
a truly successful model, it'd do it "without" him. He said he was
thoroughly disgusted with it and had washed his hands of it "forever."
These thoughts/impressions came from a highly experienced jet modeler
who ejoys the earned reputation of being one only 3 modelers considered
to dwell on the leading-edge of jet technology. I respected his advice
and took it!
Please go into this project with eyes "wide" open and honestly consider
and appreciate all the possible ramifications.
Adios and, sincerely, best of luck, Al
|
320.21 | .... HUMANS WILL GO ANYWAY. THNK THE LORD FOR THAT | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Tue Dec 01 1987 16:00 | 34 |
| I was going to prefix my last note with:
"I can hear Al from here: Don't touch it, you'll be sorry".
but I decided to leave him the privilege..
I can only answer this: Just because there have been many failures
doesn't mean one should not try again. Eventually, sufficient knowledge
will be gained that allows to deal with the problems. As an example
that why I got interested in the engine synchronizer to try to
address the 1-engine out problem. Besides I'd like to given the
opportunity to fail.
At the moment, it's not built. And its not likely to be built soon
'cause of budget consideration. My disposable income has suffered
major trauma due to the fact that my mechanic found a way to
dump my TV, VCR & tape deck on the floor (climbed on rocking chair
to reach cable TV converter, rocking chair went dragging mechanic
holding to converter for dear life, converter is attached to TV
that is attached to VCR that has tape deck on top of it.). Alles
kaput...
I also need to complete my RC training program. That is going to
take a while too and more $$. I will in all likelyhood build other
ducted fan models before the ME-262 to find out if I really want
to go forward into that area of RC.
AL, the advice is well taken and I understand very well the risks
and consequences. I'm trying my damnest to minimize/reduce them.
TTFN
md
|
320.22 | Who goes bump in the night? | MDSUPT::EATON | Dan Eaton | Tue Dec 01 1987 17:00 | 4 |
| RE:-1
I just have to ask. Is "my mechanic" another name for you? 8^)
Dan Eaton
|
320.23 | Insurance? | K::FISHER | Battery, Mags, & Gas Off! | Wed Dec 02 1987 09:04 | 23 |
| > 'cause of budget consideration. My disposable income has suffered
> major trauma due to the fact that my mechanic found a way to
> dump my TV, VCR & tape deck on the floor (climbed on rocking chair
> to reach cable TV converter, rocking chair went dragging mechanic
> holding to converter for dear life, converter is attached to TV
> that is attached to VCR that has tape deck on top of it.). Alles
> kaput...
Check out your household/renters insurance. You would be surprised what
they cover. I have had my sliding glass door replaced because it
fogged up inside and my freezer replaced because it burned up.
In the first case glass breakage. The insurance rep said there must be a
crack (even tho hidden under an edge) or else it wouldn't fog up between
the thermo panes. In the second case since the motor actually had caused
flames it was covered by fire insurance. Sounds like a household accident
to me.
_!_
Bye ----O----
Kay R. Fisher / \
================================================================================
|
320.24 | its tough luck charlie.. | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Wed Dec 02 1987 10:02 | 8 |
| re .-2 Mechanic is 5 yr old son.
re .-1 Already did. Insurance covers 17 "perils" (war, flood, malicious
damage, fire, etc.) and damage to stucture (like son putting
rocks through windows). This case not covered. Now if my
father had tripped and done all this, I'd be all set. His
insurance would cover that.
md
|
320.25 | Plans are in !! | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Mon Dec 14 1987 10:22 | 36 |
| Ok.. I ordered the plan set from Air Flair. Got them Friday.
There are a number of deviations from the prototype.
First the nacelles or 1/2 inch bigger in diam (this was done to
accomodate the dymanax unit). The VIOJETT will fit is a scale sized
nacelle (6 inch). Also the engine opening is 5 inches (dynamax fan size).
If the opening is scale it should be 3 inches. Now this may not
be feasible if one wants to get good performance. I have to
contact Bob Violett on this one.
This wing airfoil is Semi-Symmetrical and much fatter than the
original.A quick measurment showed that the lower half of the airfoil
appears to be close to the proto's airfoil. The wingtips also are not
scale. It makes the wing look funny. The incidence is 0 deg.
(not suprising is airfoil is different). Proto had +2 deg.
The elevator hinging is done straight. On the proto, the hinging
line was almost parallel to the stab leading edge.
The rudder hinging line goes the full length of the fin. This is
not the case for the proto.
The main landing gear does not appear to be located properly (wider
track) I'll have to look at this one in more detail.
The fuse outline looks on the money. This is difficult to judge
cause the kit has a fiberglass fuse. There are no fuse details
in the plan set
(Hey, Al: Did Tom Cook make a built-up fuse (formers & sheeting)
in his first versions or did he go to a fiberglass fuse directly ??
If he did the former, I'd love to get my hands on the originals)
I think I'm also going to get the version from the outfit in germany
& compare the details.
|
320.26 | SORRY..... | MAUDIB::CASEYA | THE DESERT RAT (I-RC-AV8) | Mon Dec 14 1987 10:48 | 7 |
| Marc,
Tom built a plug and pulled a fiberglass fuse from it for the prototype
and subsequent models. To the best of my knowledge, he never had
any drawings for a conventional built-up fuse.
Adios, Al
|
320.27 | | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Mon Dec 14 1987 11:16 | 12 |
| I must admit I'm not too suprised given the size of the model.
A couple of other things I forgot to mention: The stap airfoil
is also thicker than the proto.. The flaps are shorter (that because
the nacelles are bigger. The ailerons are somewhat longer and
The wing is well designed for rigidity with a laminated former running
just about the whole length of the wing. It also builds the dihedral
right in. Save on grief...
md
|
320.28 | THERE'S PROBABLY A REASON FOR DEVIATIONS......... | MAUDIB::CASEYA | THE DESERT RAT (I-RC-AV8) | Mon Dec 14 1987 11:35 | 20 |
| Marc,
The differences [departures from scale] yer' noticing are not in
the least unusual for a jet. As you've correctly surmised, the
DF unit "requires" certain concessions be made to such things as
nacelle diameter, air-intake area, etc. and these concessions "can"
"domino" into other deviations, vis a vis the smaller flaps.
Also, aifloil sections are frequently changed to make them more
suitable/safer than a scale arifol might be to model application.
Even Cooks F-4 has many small deviations such as larger air intake
scoops to enhance the operation/reliability of the DF unit(s).
Correcting hinge-lines, minor outline corrections, etc. won't cause
any grief but I'd be careful of altering airfoils, areas, moments, force
arrangements [incidence], etc. cause there's most likely a verrry
good reason they're the way they are, no doubt arrived at the "hard'
way, i.e. by trial [crash] and error.
Adios, Al
|
320.29 | | BZERKR::DUFRESNE | VAX Killer - You make 'em, I break 'em | Mon Dec 14 1987 12:28 | 21 |
| no debate form me on these, especially the wing airfoil mods.
At the moment, the only things I'd even consider changing would the
nacelles outer diameters (make them smaller) to fit the VIOJETT
with a straight-through air flow, adjust the flap size to match,
rework the wing tips and rudder/elevator hinge lines to have
"more scale" appearance.
AIrfoil re-do, leading edge slats and scale engine inlet/outlets
would be left for evaluation for a follow-on version.
Btw, an other interesting oberservation: I recall plan locations
for servos & Rx but nothing for fuel tanks. This was most noticeable
'cause rudder & elevator servo are mounted right against the back
of the cokpit bulkhead. That where the fuel tank is located in the
proto. Anyone got any ideas on this one. A pair of 11cc (.77) engines
of going to require a fair bit of the stuff and that takes up space,
not to mention weight. (Under the cokpit is out of the question,
thats where the main gear is stored in flight.
md
|
320.30 | TANK LOCATION COULD BE TROUBLE........ | MAUDIB::CASEYA | THE DESERT RAT (I-RC-AV8) | Mon Dec 14 1987 14:47 | 36 |
|
Marc,
The "saddle" tanks commonly used in jets where engine(s) is/are mounted
conventionally in the fuselage are probably out of the question owing
to the restricted available space in the nacelle(s)..."unless" you
could go to the smaller Viojett DF units and, by retaining the larger
[non-scale] nacelle intended for the Dynamax, have space to mount
a pair of saddle tanks in each nacelle. To me, this would be ideal,
though the additional weight out in the wings might be undesireable
from a stability perspective.
Most likely, Tom used a main tank(s) in the fuse with (ARRRGGGGGGH!!)
pumps to provide the necessary fuel draw to the engines. Gawd! I'd
hate to add one more potentially unreliable factor to an already
tenuous setup! Fuse mounted tanks would also necessitate some sort
of coupler/decouplers in the fuel lines, another potential problem
area...air leaks would "literally" kill you with this bird. Only
other thing I can think of is mounting the tank(s) on or in the
wing. Kent Walters uses sort of a "wet-wing" setup in his 13' B-17
in that he built fuel-bays right into the wing, into which he inserted
plastic hospital IV bags which feed small header tanks in each
of the four nacelles via a Robart (ARRGGGGH!!) pump on each O.S.
.90. The system is far from proven at this stage as it's only been
tried once during the [so far] sole flight of Kent's beauty. Kent
"did" run exhaustive tests of the system in an Ugly Stik prior to
installing it in the "Fort," however, and it "seems" to work OK.
Kent's concerns about building a vacuum as the IV bag is pumped
out "seem" to have been unfounded though he/we don't fully understand
the why of it. My advise, once you've progressed to that stage,
would be to get plenty of input from the likes of Larry Wolfe, Bob
Violett, Tom Cook or, you've got a real good jet jockey reasonably
close to you (New Jersey) in Bob Fiorenze. You certainly can't
afford any half-assedness in this vital/critical area.
Adios, Al
|
320.31 | I know this is cheating, but...... | SNOC01::BROWNTONY | Tony Brown Sydney, Australia | Wed Dec 23 1987 21:40 | 12 |
| For what it's worth: I vaguely remember seeing a plan for an ME-262
driven by a single .40 (prop) with a span of about 1.4m.
This might be an interesting hack model to learn a little about
the flying charateristics, assuming that it's reasonably close to
scale etc. etc.
Let me know if you are interested and I will research the source.
Good luck.
Tony
|
320.32 | | CLOSUS::TAVARES | John--Stay low, keep moving | Mon Dec 28 1987 12:05 | 19 |
| In the December 1987 issue of Model Builder there is an article
on Jets At The Belleville Fly-In, which mentions Dr. Jack Tse's
fleet of planes: "In addition to the SR71s, F-18s, and ME-262s
that Jack brought last year...."
Jack Tse is well known for showing up with a large fleet of
planes. The article states that he produces "fiberglass, foam,
and machined specialty parts for his designs on a custom basis."
I even have an address and phone, from the mag:
Dr Jack Tse
Suite 102,
3040 Palstan Road
Mississauga, Ontario Canada
Phone: (416)275-7256
This information was printed on pages 85 and 86 of the mag.
|
320.33 | Its not a cheat | BZERKR::DUFRESNE | VAXKLR - You make'em, I break'em | Sun Jan 03 1988 23:33 | 8 |
| re .-2 : one engine in the nose would not be cheating all: The me-262
V1 had just that configuration. They had the airframe ready before
the engine. Henschel was having a devil of a time getting the power
up to spec so the engineers decided to test the airframe.
re .-1 I'l gert in touch with him. tx for the tip.
md
|
320.34 | I KNOW SOMEONE WHO MIGHT BE OF HELP... | SCOMAN::JNICHOLS | | Fri Feb 05 1988 22:05 | 17 |
|
I'm new to DEC and to notes, but have a interest in RC in general
and ducted fans in particular. My father has a close friend who
has been building ducted fans for 25 years. His name is Mike Kulczyk
and he now calls Austin, Texas home. He wrote a ducted fan column
in one of the magazines, but I'm not sure if he still does or which
magazine it is/was. Anyway, several years ago, he built a Me-262
which flew very well. I'm not sure the engine size, but it had
retracts, flaps, etc. If your interested, I'll be glad to get you
his address and phone#. Mike is a very nice person who is a long
time addict to this, and I'm sure he would be more than happy to
talk to you.
Jim
|
320.35 | Sure, fire away !! | BZERKR::DUFRESNE | VAXKLR - You make'em, I break'em | Mon Feb 08 1988 14:30 | 6 |
| Hey, I'll take any help I can get and any possible source for Me-262
designs.
tx in advance
md
|
320.36 | Plan details | SNOC01::BROWNTONY | Tony Brown Sydney, Australia | Wed Feb 10 1988 19:42 | 21 |
| Marc
The Autumn 1986 copy of the English magazine Radio Control Scale
Aircraft Quarterly has a design for 262 driven by a single OS40 with
prop. The plan is available from the publishers:
Plan number RSQ 1525
ASP Plans Services
PO Box 35
Wolsey House, Wolsey Road
Hemel Hempstead, Herts. HP2 4SS
U.K.
Price is #6.25( pounds sterling)
The same magazine has a description of the prototype and a part
view of their scale drawings. These are sold as plan number 2891
price #1.80.
Please send me your mail address if you want a copy of the (brief)
construction article.
Tony
|
320.37 | Plastic Me 262 Super Detail kit | JUNIOR::NEWBERY | D Doright-MadCap Mountie or KGB Agnt? | Mon Mar 07 1988 15:54 | 7 |
| while visiting the local pusher at lunch today I saw a 262 Master
Scale kit in plastic 1/32 scale for 60US. It was/is put out by a
Japanese outfit (Hegwa I think) and looks like it has details up the
.... You might want to look into it as a reference for you project.
Maybe use it to see what details you want or can include and which
to leave out to make room for the radio and related gear.
|
320.38 | | BZERKR::DUFRESNE | VAXKLR - You make'em, I break'em | Tue Mar 08 1988 09:18 | 6 |
| $60.. yeech.. They don't give that stuff away, do they ??
Last time I built a plastic (loong, long, log time ago), prices
were aroung $5.
md
|
320.39 | real expensive AND real nice | DRUID::TRUEBLOOD | Penguins are clever little sods | Tue Mar 08 1988 10:34 | 5 |
| re: .37/38 It's made by Hasegawa/MiniCraft. REAL superdetailed
stuff, not one of those Monogram jobs where the pieces don't fit,
and the decal patterns are molded in the body, etc....
DT
|
320.40 | an A for $25.oo | JUNIOR::NEWBERY | D Doright-MadCap Mountie or KGB Agnt? | Tue Mar 15 1988 16:48 | 6 |
| The $60 one is a 262 B. I also saw today a $25 version by the
same company (hasegawa) of the 262 A. It wasn't labeled super scale
but I would assume its as good outside as the other but with less
detail parts. I believe these were 1/48 scale. The Hobby Emporium
in Nashua has both kits; low on the shelf in the back left corner
of the store should you wish to find them 8^)
|
320.41 | | CLOSUS::TAVARES | John -- Stay low, keep moving | Tue Mar 15 1988 18:02 | 2 |
| Isn't that a little expensive for 1/48 scale?
|
320.42 | It's all in the eye of the beholder | BZERKR::DUFRESNE | VAXKLR - You make'em, I break'em | Wed Mar 16 1988 09:32 | 5 |
| a 1/6th scale flying version will set you back about $2000.00.
It's a matter of perspective.
md
|
320.43 | plenty of interior detail | DRUID::TRUEBLOOD | Penguins are clever little sods | Wed Mar 16 1988 12:00 | 8 |
| Judging from the photo in the new Hasegawa catalog the
$60 dollar job has hatches that open to reveal the
cannons, jets, etc and it also has a highly detailed
cockpit. (They also describe the landing gear detail as
being razor sharp or some such thing, which is of little
interest to myself as I haven't shaved for 2� years. :^)
DT
|
320.44 | | BZERKR::DUFRESNE | VAXKLR - You make'em, I break'em | Thu Mar 17 1988 12:14 | 6 |
| ..and I haven't had a razor to mine for over 15.
I guess I'll have to look the plane up once I get the stuff on the
bench out of the way.
md
|
320.45 | more model sources | BZERKR::DUFRESNE | VAXKLR - You make'em, I break'em | Thu Apr 07 1988 10:38 | 24 |
| Ok, we have two more sources for models:
Tony Brown send me a extract from RC Scale Aircraft (Autumn 86)
that describes a prop driven (single engine in the nose) model.
Engine size is .40. wing span is 1.3 m. Scale is ok. Fixed gear
or none (ie hand launch).
(Tony: I tried to send you mail to tell you everything came through
but NMAIL gave up after 3 days with node unreachable msg)
The other is a german kit. To quote Bob Day:
"There was a feature (bob: In RCM/E ?)
on the Nuremburg show this month... There it was, another
me262a. This time they said it was produced by Bauer Modelle,
and was 1/6 or 1/8 scale, I can't remember which, but it
was 2085mm span.... Designed for 2 x .60 fans...... "
I hope to get more details shortly.
md
|
320.46 | You're welcome | SNOC01::BROWNTONY | Tony Brown Sydney, Australia | Tue Apr 12 1988 22:06 | 21 |
| Marc
Glad to see that you received the plan OK. Can't understand why
you had electronic mail problems, but I'm a little busy to investigate
at the moment.
Did you see the review in RCM earlier this year on the engine
synchronizer? Sounds like an essential item.
Good luck
Tony
P.S. To all you graphics fiends, I've just had a chance to catch
up after a few hectic months and I feel a little left out without
a logo. Is this mandatory for one's self esteem? Perhaps mine should
be:
+
------|------
Tony
|
320.47 | ANOTHER CLUE...... | GHANI::CASEYA | THE DESERT RAT (I-RC-AV8) | Wed Apr 13 1988 11:31 | 13 |
| Marc,
Look inthe latest (June) issue of either M.A.N. or M.A. in the coverage
of a foreign (German?) tradeshow and you'll see a nice pic of a
framed-up ME-262. The manufacturers name (which I forget) is given
but no other details appeared. Still, maybe it's another _lead_
for you.
|
| | 00 Adios, Al
|_|_| ( >o
| Z__(O_\_ (The Desert Rat)
|
320.48 | IT'S IN M.A.N. | PNO::CASEYA | THE DESERT RAT (I-RC-AV8) | Fri Apr 15 1988 11:48 | 22 |
| Marc,
Re: .-1, the article I referred to appears in the June issue of
Model Airplane News. The article by Chris Chianelli, titled "Nurnberg
Mission," covers the Nuremberg Tradeshow in West Germany. The author
states that all the merchandise pictured _would_ become available
in the U.S. which would lead ont to believe that the ME-262 will
be available here someday.
As I said, details are sketchy at best but, from the picture of
the unfinished airframe, the model appears to have a gel-coated
glass fuse and straight glass nacelles with, most likely, balsa
sheeted, foam-core flying surfaces. No dimensional information
is provided but the kit comes from Bauer and is intended for twin
Bauer fan units. If you have any idea what size a Bauer fan is,
you could guesstimate the size from there.
|
| | 00 Adios, Al
|_|_| ( >o
| Z__(O_\_ (The Desert Rat)
|
320.49 | | BZERKR::DUFRESNE | VAXKLR - You make'em, I break'em | Fri Apr 15 1988 13:03 | 7 |
| ok, that's that same kit the Bob Day refered too. Now, I guess it's
a simple matter of finding out who imports Bauer models into this
country !!.
anyone care to try to find out or has any pointers ?
md
|
320.50 | What's the status ? | LYOISA::CAMPS | | Tue Jun 15 1993 10:19 | 7 |
|
A long time ago since the last reply !
What is the status of a dual Ducted Fan ME262 kit ? (I have some interest
in building one).
Gilbert
|
320.51 | Its on hold. | COWBOY::DUFRESNE | | Tue Jun 15 1993 11:01 | 14 |
| The last two years have not been the best for me, personally. This has caused
havoc with my plans.
On this front, I have focused on getting background info on the Me-262 and
keeping an eye out for models, since I plan to build an FAI quality version,
probably 1/6th or 1/5th scale.
I've also moved to Europe. I can now access documentation from local sources.
And can track the development for the new JPX mini-turbines.
On the more practical side, I focusing on getting "my wings back" and re-tooling
my workshop. I don't expect to get a model going for at least 18 months.
md
|