>
> Here is the results of my adjustments to the Great Planes Super
> Decathlon.
>
> After having relatively poor results with stall strips alone, I
> decided to rework the wing. I sliced the covering along the underside
> of the wing parallel to the leading edge approximately 15 in long and
> along the outer edge of the wing. I then carefully peeled back a
> triangle of covering to expose the better portion of the outer two > bays.
>
> I generously sprayed the exposed wood with an ammonia/ water solution,
> app. 25% ammonia. Be careful, so much ammonia will take your breath > away, literally!
>
> After it had soaked for 20 minutes I placed two blue foam supports
> app. 1 inch thick under the wingtip trailing edge. Then I clamped the
> center of the wing as gently as possible to the table, making sure the
> center section of the wing was in complete contact with the table.
> Finally I placed weights on the outer wingtip leading edge to bend the
> whole wing structure down. I used about t 5 lbs on each wingtip. I let
> this stay about 20 hours.
>
> When the weights were removed I had achieved around 1.5 to 2 degrees
> incidence from the root to the tips. I also repositioned the stall
> strips to right next to the fuse and reduced them to 6 inches.
>
> In addition to this I set my dual rate to 70% of normal throw and the
> exponential rate to 80% and I linked my aileron to the rudder through
> a switch on the transmitter to get better turn control.
>
> The resulting flight characteristics were dramatically improved. Take
> off was more normal with no tendencies to drop a wing. This plane
> prefers to keep the heat on. When it slows it kind of wallows thorough
> the turns. You must also keep an eye on the nose when making slow > turns. Keep it down.
>
> My landings were normal and I had no tendencies to tip stall at slower
> speeds. It does slow down fast though due to the front surface area. >
> I must admit that I did not do any extensive slow speed stall testing
> at any height. My last experience with that dead spin has made wary of
> pushing this plane to the limit.
>
> I am running a TT 46 pro that's barely broken inn. It seems to be
> plenty of power for this model. The total weight is about 6.5 lbs. >
> I am reasonably satisfied with the results. As I get more accustomed
> to this plane's quirks I will undoubtedly find out exactly where it > stalls. ;)
>
> For the time being I intend to handle this plane like the proverbial
> Siamese cat, for those of you who have been near one of those... >
> There is no doubt in my mind that you should add washout if you're in
> the building stage. Some may argue that you will lose some acro
> abilities but better to fly many times with less acro than only once > with full spin!
>
> Thanks for everyone's help. I hope this info will assist anyone
> building this model.
>
> Cheers,
>
> Roy