| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1227.1 | ASTRO P-68 does exist | ROCK::MINER | Dan Miner, DTN:225-4015, HLO2-3/D11 | Tue Jul 10 1990 09:29 | 31 |
| > Now I found out that Astro Flight has an Astro P-68 Victor in their
> program. Is this a model of the Partenavia P-68 Victor and a twin?
> Although I've got enough projects in my shop for at least a year
> to come, I like to dream a bit on an electric twin. Can any of you
> fill me in on the details (wingspan, -area, length, recommended
> motors/batteries, weight, built up wings or foam etc etc.)? Maybe
> there are even kit reviews or photos out there and someone could
> do me a favor and send a copy to Hartmut Klingenberg @ KBO?
Yes, it is true that Astro Flight has produced a kit for the
Partenavia P-68 for quite a few years and it is indeed a twin. I
have seen a few fly and they fly very nicely. The only facts that I
know for sure that it is designed for two Astro Cobalt 05 motors
(125 watts) and 14 cells. The wings are built up from balsa. It is
designed to have no landing gear to conserve weight and drag.
I would *GUESS* that the wingspan is about 48 inches and the
fuselage is about 36 to 40 inches. I'll try to remember to look up
the actual specs at home tonight.
_____
| \
| \ Silent POWER!
_ ___________ _________ | Happy Landings!
| \ | | | | |
|--------|- SANYO + ]-| ASTRO |--| - Dan Miner
|_/ |___________| |_________| |
| / | " The Earth needs more OZONE,
| / not Caster Oil!! "
|_____/
|
| 1227.2 | DO-228 questions | ROCK::MINER | Dan Miner, DTN:225-4015, HLO2-3/D11 | Tue Jul 10 1990 09:35 | 15 |
| > One of the new things ROBBE brought out this year is a nice (but
> expensive) kit of a Dornier Do-228. They claim that this is the
> first kit of an electric twin in volume production.
Oops - I forgot to ask this in my last reply: Is the Dornier Do-228
the German plane from WW-II that has an engine in front and another
in back? *That* plane is the plane I've been dreaming about
building when I build my first twin.
BTW - when you say the kit is expensive, how expensive is it and
what is included with the kit? Can you also please post the specs
for that kit? (Wingspan, weight, construction materials,
recommended motors, etc.) Thanks.
- Dan Miner
|
| 1227.3 | Do-228 Regional Airliner | KBOMFG::KLINGENBERG | | Tue Jul 10 1990 10:03 | 40 |
| Dan,
thanks for the replies so far. I'm looking forward to see the specs of
the P-68.
The Do-228 is a fairly new plane (went into service somewhere in the
eightees). It is kind of ugly, but has it's charme. It has got a
rectangular fuselage with a long nose, a high wing with two turboprop
engines (I think PT 6). It has got 19 seats (at least the 228-100 which
is modelled by ROBBE) and is in service with several regional airlines
all over the world. One flies regularly over our town on it's way
between Munich and Friedrichshafen. The real interesting thing is the
wing. It's called TNT (Tragfl�gel neuer Technologie = Wing of new
technology). It has an interesting shape with a several times swept
leading edge (I think you call it Schuman planform) and especially the
wingtips have a shape that reduces induced drag significantly. The
plane has good STOL performance (for island hopping or third-world
countries), but still reasonable flight performance.
The ROBBE model has a 1500 mm wingspan (59 in) and should be powered by
14 cells, probably two motors in the ASTRO 05 range. It has got a very
small landing gear that looks as if it might need a paved runway. And
the price (retail) is DM 299,- (ca. $ 175,-). That's most of what I
know. Sorry, I don't have a ROBBE catalogue (but you should have the
newscatalogue I left with DECRCM). If you need any further details,
please let me know, and I'll have a look at the kit the next time I see
our hobby shop.
The plane you were thinking of is the Do-335. Not really sure about the
name, I seem to recall 'Ameisenb�r', but Al Casey mentioned 'Pfeil'.
Maybe both names were used for this one. I described it a bit in a note
in Trivia some time ago, but have yet to see an electric model of it. A
guy from the club I belonged to ten years ago had a nice glass
fuse/foam wing kit, designed for a .60 and a .40-.60 engine.
Unfortunately, he built it when I left the club, and I never saw it
fly. I think there are kits or at least plans around for this beast. If
you are further interested, let me know.
Regards,
Hartmut
|
| 1227.4 | More P-68 Specs | ROCK::MINER | Dan Miner, DTN:225-4015, HLO2-3/D11 | Wed Jul 11 1990 17:36 | 25 |
| Well, I couldn't find any information at home that came directly
from Astro Flight, but I did look up the specs for the P-68 in last
year's Tower Hobbies catalog:
56 inch ( = 1422 mm) wingspan
48 ounce flying weight
(fuselage length not given... I forgot to write down price...)
The picture *IS* shown with landing gear and Tower Hobbies (and
Astro Flight too?) recommends 1.5 inch ( = 38 mm) nose wheel with
1.75 inch ( = 44.5 mm) mail wheels.
The P-68 that I have seen fly did not have the landing gear
installed.
_____
| \
| \ Silent POWER!
_ ___________ _________ | Happy Landings!
| \ | | | | |
|--------|- SANYO + ]-| ASTRO |--| - Dan Miner
|_/ |___________| |_________| |
| / | " The Earth needs more OZONE,
| / not Caster Oil!! "
|_____/
|
| 1227.5 | I'm building the Astro P-68 Partenavia | LEDS::COHEN | There's *ALWAYS* free Cheese in a Mousetrap! | Mon Jul 16 1990 16:25 | 27 |
| It just so happens that I'm building an Astro P-68 (have been for over a
year, it's one of those slooooow projects).
The plane is designed to fly on anything from 035 Ferrites to 05
Cobalts. That means power is anything from 10 cells to 14 cells. Most
definitely intended to be flown with landing gear! Originally a flat
bottom wing with flying stab, Astro discontinued and then reintroduced
the kit (about 2 years ago) as a semi symmetric with conventional
stab. The kit contains all hardware but the electricals and the wheels.
Buildup is pretty easy. tail surfaces are slab balsa, the fuse is
pretty much just a box. There's some amount of sanding for nacelles and
nose, but other than that, not much else that's even remotely difficult.
You end up with a standoff scale type model of the Partenavia P-68
Victor twin engine commuter plane (it's built in Brazil, if I recall).
The plane can be built either three or four channel (Throttle, aileron &
elevator, optional rudder). Astro claims it'll be airobatic. I intend
to fly on 12 800MAH sized cells, with speed control & all four channels.
I'll be using two Astro 05 Cobalt car motors I got cheap (they're not as
fast as the airplane motors, but have more torque, hopefully they'll fly
it OK. I'm going to use 7-5 or 7-6 props instead of 6-4 or 7-4).
The kit itself was fairly inexpensive. Less than $50.00, I think. It's
the power system that'll kill you in these planes. Cobalt motors are
generally not cheap, speed controls that'll handle 14 cells aren't,
either.
|
| 1227.6 | Can you send the instructions?? | KBOMFG::KLINGENBERG | | Tue Jul 31 1990 12:45 | 26 |
| Randy,
thanks a lot for your reply. Sorry for not answering, I was very busy.
Your reply made me a lot more curious about the Victor. Since you've
got it - would you be able and willing to send me a copy of the
building instructions (to Hartmut Klingenberg @ KBO)? I haven't even
seen a picture of the model yet.
> The kit itself was fairly inexpensive. Less than $50.00, I think. It's
> the power system that'll kill you in these planes. Cobalt motors are
> generally not cheap, speed controls that'll handle 14 cells aren't,
> either.
I know, oh how well I know. And it will take me some time to save the
money for two cobalts... But maybe ferrites will do, I'm just about to
start using rare-earth magnet motors and we'll see the difference in
performance. On the other hand, I need a controller for 12 cells anyhow
(for my Fiesta), and there is one model available that is parted into
controller and power part. For multiple motors, you can plug more power
parts into one controller, put the power PCBs close to the motors and
reduce the influence of EMI. If I keep dreaming about a twin, I might
take that controller into consideration.
Best regards,
Hartmut
|