| Title: | Welcome To The Radio Control Conference |
| Notice: | dir's in 11, who's who in 4, sales in 6, auctions 19 |
| Moderator: | VMSSG::FRIEDRICHS |
| Created: | Tue Jan 13 1987 |
| Last Modified: | Thu Jun 05 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 1706 |
| Total number of notes: | 27193 |
Ace 4-40 upgrade to ace 4 - ?
After the resent demise of my first 4 - 40 at the hands of a 91
surpass last Friday, I started building another one on Saturday. This
one will be extensively modified to handle the power of the 91. The
original was totally stock, with the 91 mounted to it, and the wing
just couldn't handle it.
I am done building the fuselage, and have 1/2 of the left wing built
On the fuselage I modified the area for the tank so I can use an 11
oz hayes. I had a 10 oz flex tank crammed in the first one, and it was
a pain to remove and install. I also moved the firewall back 1/2 inch
to help compensate for the weight of the 91. As in the original, the
throttle, rudder, and elevator servo's are installed in the rear of the
fuselage under the turtledeck to help balance off the 91.
I added 2" in height to both the vertical stab and rudder. This will
help offset the engine torque, and will give be additional ruddr area.
Mods on the wing include: CLipping 3 inches off each wing tip. This
will change the wing span from 57" to 51". I am removing most or all
the dihedral from the wing, and modifing the wing tips ala the Wot-40
and UNIC. The wing will be sheeted and glassed out to 10" from center.
The original only had 4" sheeted and glassed. The main spruce spars
(top and bottom) have been upgraded by 1/16 inch to 1/4 * 3/8. I am
adding horizontal webbing to the main spar in addition to the original
vertical web's. I am also adding vertical webbing to the rear spar.
I am also going to use a wider chord aileron stock for the flaps and
ailerons to compensate for the "clipped wing"
The wing will be bolted on with 4 bolts instead of the original
rubber band arrangement.
The undercarraige will be custom fashioned fron 5/32 music wire. I
am attempting to stop the landing gear form ripping out the bottomof
the plane which was common with original. In addition, it will allow
the groung clearance for the 14/5 prop I will be using.
As with the original, I will be using micro servo's in the wing to
drive each aileron, and I will have flaps driven off the original
aileron linkage.
Target weight is 5 pds, 12 oz. The original was 5 pounds, 6 oz with
the 91 installed.
Target completion in 2 weeks. 3 weeks on the outside.
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1224.1 | CONSTRUCTION PROCEEDING | WMOIS::DA_WEIER | Mon Jul 02 1990 17:46 | 27 | |
Well I am one and one half weeks into the process of building
my new Ace 4-40 version. I think I will call it an Acro-Ace, or Ace-Acro,
but first I will see how it flys.
The wing is esentially complete and ready for Mono-koting. The
wing is much stiffer than the original. I also took all the dihedrel
out. I decided not to bolt on the wings, and will once again rely on
rubber bands. I only have a limited knowledge of bolting wings on, and
I don't want that to be the cause of the next crash! I also went with
flat wing tips instead of the type on the Unic's and Wot-4's. This will
keep the wing slightly shorter, and easier to transport. It was also
faster to build, and I am trying for a short build time. I also used
CA and .6 oz cloth on the wing. It worked great, except the cost, and
I just used automotive primer to fill in the fiverglass weave. Worked
great!.
The fuselage is almost complete. I just epoxied the the horizontal
and vertical stabs on today. The major work left to do is the
covering, running/connecting all control rods, hinging, and other
finish work.
If it wasn't for the fact that I am leaving on vacation this
Saturday, It would probably have been ready for flight trials by
Sunday.
Getting close,
Dan W.
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| 1224.2 | Nearing Completion | WMOIS::DA_WEIER | Wings are just a place to hang Ailerons | Tue Jul 17 1990 19:47 | 36 |
Since returning from vacation on Saturday, I have been Monocoating,
Monocoating, and Monocoating. I am finally finished except for the
trim. I got the opportunity to use my newly purchased heat gun. It
really seems to make for a neater job. I covered the plane in metallic
red and metallic blue with white trim. The red and blue are a very
dark combo, so I hope the white will offset the red/blue and provide
decent visiability. Since the last note, I have opted for 2 changes
to the plane:
- I will be trying a 12.5/7 3 blade Graupner prop and spinner.
This will help with ground clearance, but the real reason is I
love the way they look and I have always wanted to try one.
Besides, its worth it just to aggravate John Ross at the CRRC
meeting. (Seriously, I will be very cautious when operating the
engine with this prop).
- I am using J-Tec rubber engine mount bolts to help diminish
noise and vibration.
The good news is that the projected weight looks like it will be
5 pounds +/- . This will be 6 oz lighter that mt last 4-40 with the
91 installed, and 12 oz less than my original projection for this
plane. With the lighter weight and the clipped wing, I should not
have any problem with vertical performance, I only hope the flaps will
be effective enough to allow for decent landing speeds.
I decided to stick with the stock landing gear until I can fashion
up a new U/C. Hopefully I will not rip it out first.
Hoping to have it basically done for the CRRC meeting on Wednesday,
and ready for its first flight on Saturday. If I don't count 1 week
when I was gone on vacation, it will be 3 weeks from start to finish.
(Is this good enough for an honorary degree from the Dan Snow school
of speed building? )
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