Can we change the ailerons on the Supercub and make it better?
I was doing a bit of SC.org research and came up with the following posts. These are taken out of context and pasted here as thought provokers. Are the ailerons on the PA12 really that much better? Is it just the LE shape of the aileron that makes all the difference or is it in the total bellcranks, pulleys, shape, system package? I do not really want to completely redesign the wing (and fuselage) but if all we are talking about is reshaping the aileron, hangars and false spar....then I would ask...why not?
Surely someone else has thought of this or done it. I understand the PA14 wing is similar to the PA12 wing. Yes/no? How does it compare to the SC.?
The next point is that if it is such a great idea why has it not already been done? We have a lot of flexibility with the experimental Supercub movement currently underway. Wayne Mackey, Calkins, Crash, Jerry Burr,.....you guys have a lot of experience. What do you think? Can we change the ailerons on the SC and make it better?
I think some development has been hampered by having to stay certified but in the last 7 or 8 years we have seen a great deal of innovative work with the SQ2, Carbon Cub, and thrustline development, widebodys etc.
The PA-12 aileron is physically different than the PA-18 aileron (compare the leading edge of each), and this difference in combination with the cable routing and bellcrank system in the PA-12 make the Cruiser a MUCH nicer handling airplane. PA-12 ailerons are lighter and more responsive, and also offer a cleaner installation aerodynamically (and aesthetically) due to the fact that all the cables are internal.
The shape difference of the ailerons is the most noticeable difference. Some will say that this is the reason for more authority especially at lower speeds. My take is that while this may help---I see the big difference being the differential ailerons on the 12. Deflection being 31deg up and 25 down for a combined total of 56 degree range. The 18 is equal deflection up as down for a combined range of 36 degree (18 up 18 down). I have also suspected for some time that this difference contributes to the moose stall more readily in the 18 than the 12.
12 vs.18 wings
I've had about a dozen of each, and I've always felt that the 12 has a far better roll rate and aileron response.
Does this difference have anything to do with the quicker aileron response of the 12 ?
Russ, copy the PA-14 as close as you can. It has great performance with stock ailerons and flaps. It's roll rate is even faster then a stock PA-18 wing.
if you use the PA12 ailerons on yourPA18, you'll have to add the PA18 aileron horn the center hinge, or totally modify the aileron control system to the PA12 configuration. I would sell the PA12 aileronsand buy a set of PA18 ailerons. You might even be able to trade a set to someone.
Lot less trouble in the long run.