Need HELP on Flaps!!! Please...

[brownie]

Hi everyone,

I need help/advice on issues with my Formosa II.

Scenario:
- Normal flight w/o flaps activated (not lowered), the controls are normal.
- When flaps are activated (lowered), setting to 50%, the plane rolls right.
It rolls to about 35 degrees angle of right bank.
- Checked on ground that the ailerons are balance (throw distance are equal).
- I don't think the C.G for the lateral is an issue as w/o flaps it flies straight and level.

What could be wrong?
I appreciate help from anyone.
Thanks in advance.

[jansonfinn]

Hi everyone,

I need help/advice on issues with my Formosa II.

Scenario:
- Normal flight w/o flaps activated (not lowered), the controls are normal.
- When flaps are activated (lowered), setting to 50%, the plane rolls right.
It rolls to about 35 degrees angle of right bank.
- Checked on ground that the ailerons are balance (throw distance are equal).
- I don't think the C.G for the lateral is an issue as w/o flaps it flies straight and level.

What could be wrong?
I appreciate help from anyone.
Thanks in advance.

u mentioned that the plane rolls to about 35 degrees angle of right bank n stop there after activiting the flaps? Or it continues to roll?

[brownie]

u mentioned that the plane rolls to about 35 degrees angle of right bank n stop there after activiting the flaps? Or it continues to roll?

it maintains are this angle of right turn. meaning to say, it fly round and round clockwise, though it is still manageble to have authority to keep it straight with left stick input.

i find it dangerous to land with 50% flaps, i dislodge the landing gear while landing flapless.

jason, hope u can help.

[randomtask]

Why don't you just try landing without flaps? Less hassle programming and grease in those landings.

Cheers,
Adnan

[jansonfinn]

it maintains are this angle of right turn. meaning to say, it fly round and round clockwise, though it is still manageble to have authority to keep it straight with left stick input.

i find it dangerous to land with 50% flaps, i dislodge the landing gear while landing flapless.

jason, hope u can help.

landing by flaps or w/o flaps is by skill. U dun depend flaps to land well. (To a certain extend). Flaps landing is onli more for scale purposes rather than the actual facts compare to the 1:1 real A/C.


IMO, U should learn landing w/o flaps 1st. tis the most basic in this hobby

[brownie]

landing by flaps or w/o flaps is by skill. U dun depend flaps to land well. (To a certain extend). Flaps landing is onli more for scale purposes rather than the actual facts compare to the 1:1 real A/C.


IMO, U should learn landing w/o flaps 1st. tis the most basic in this hobby

i know i should, agree totally but this ain't the issue isn't it guys?
Muhahha.i am not trying to say i am poor or good in landing. i am facing the flaps problem not the landing problem? i just wanna make use of the option or function? why land the airplane w/o flaps when u have one? do u expect the real pilot to do so as well? just joking, don flame me bcoz i say this...

[randomtask]

One way is to physically measure that both flaps go down the same distance. This may be one of the causes of your plane rolling to one side.

Cheers,
Adnan

[jansonfinn]

i know i should, agree totally but this ain't the issue isn't it guys?
Muhahha.i am not trying to say i am poor or good in landing. i am facing the flaps problem not the landing problem? i just wanna make use of the option or function? why land the airplane w/o flaps when u have one? do u expect the real pilot to do so as well? just joking, don flame me bcoz i say this...

Ok, back to the technical question. R u using flaparons or servos used purely for flaps?

[blueangel]

If there is tweak in the flaps say one side effect more than the other side, then the plane should keep rolling and rolling until drop and stall.

It is interesting to know that it only keep circling at that 35 degree bank round and round...

By the way, with the flaps it looks like a real plane during landing

Anyway I am also experimenting with DIY flaps/aileron setup on my otherwise rudder/elevator-only plane.

[joed]

Brownie I think you said it right. The issue is with the flaps.

Your problem sound interesting. Thou I have no id what could be the cause right now, may I suggest you check thru your Tx setting?

You may have activated some mixing function when you activate your flaps without knowing it. You could try....

[brownie]

Ok, back to the technical question. R u using flaparons or servos used purely for flaps?

i am using flaperon setting, flaptrm -50.

[brownie]

If there is tweak in the flaps say one side effect more than the other side, then the plane should keep rolling and rolling until drop and stall.

It is interesting to know that it only keep circling at that 35 degree bank round and round...

By the way, with the flaps it looks like a real plane during landing

Anyway I am also experimenting with DIY flaps/aileron setup on my otherwise rudder/elevator-only plane.

yep, dun understand why too, ok i may do a physical measurement of aileron throws instead of a visual one.

[brownie]

Brownie I think you said it right. The issue is with the flaps.

Your problem sound interesting. Thou I have no id what could be the cause right now, may I suggest you check thru your Tx setting?

You may have activated some mixing function when you activate your flaps without knowing it. You could try....

joed, thanx for ur understanding.
i am sure u r an uncle (osrry dun mean to say u r old) (just feel the maturity in ur statement).

i will check my transmitter as advice by u.

[blueangel]

yep, dun understand why too, ok i may do a physical measurement of aileron throws instead of a visual one.

I didn't do any measurements on my DIY flap/aileron. I just cut and hinge it and then set both servos of the same throw. But that is because my cutout area for the flap/aileron are small as compared to your Formosa II. So, if you do have a big surface control area, that means any little offset will greatly magnifies the problem ( aka roll ).

My DIy flaps/ailerons is only 1/3 of the wing span..... anyway, they didn't work effectively enough - didn't roll much . I will modify with a bigger flap/aileron to test again. Till then, I will definitely do what you gonna do today, check and measure

[blueangel]

I just move both flaps down and measure the gap. Simple