ORIGINAL: Crabstick
Hi guys
I am wondering about possible techniques to land the low wing cap, its a 1m wingspan ep - I have a turnigy 3536c 1100kv with an apc 11X4 slowfly, hyperion titan 30a and a 2200mah lipo - plane weighs about 700 grams, and i have got flaperons - but havent used them to land yet
it flies beautifully as its overpowered and unlimited vertical is an understatement, but the first three landings i managed to flatten the landing gear - it doesnt land like my e-starter or 3d sukhoi profile :P
what point if any should i start dialing in some flaperon ? how much, what sort of speed should i be landing at?
cheers
Matt
Matt:
You should learn how to slow fly your airplane. How do you suppose Jets land?
Suggest you go to altitude and set your powerhouse motor at about 1/3 throttle and pitch trim the airplane to fly level. Fly around for a while maintaining altitude and doing shallow turns until you are comfortable with the handling. Then without changing trim, add a bit of power to make gentle climbs, and decrease power to make gentle descents.
Then fly a traffic pattern using power to descend and land. If you feel the trim speed is still too fast (too much float before touchdown), then go up and practice at a slower trim speed and try again.
I'm assuming that you wingspan is about 40 inches, and average chord about 8 inches; so at 24.7 oz (700 grams) your wing loading is about 11 oz/sq ft. Applying Kieth Shaw's formula, your Cap 232 stall speed is about 15 mph and a good approach speed for landing would be about 20 mph.
Don't know if these numbers mean anything to you, but if you can find the trim speed of your airplane of about 20 mph, you would be able to use the throttle to control your descent, and with a touch of the elevator to flare, you can have a consistent good landing every time.
This is applying what aussiesteve is telling you in the post #2 above.
If you try it, you might like it, and you might continue to use it!
feihu