ORIGINAL: atomic monkey
I am building my first large R/C plane, a CG Super Chipmunk. I keep seeing forums saying that they are upgrading their airplanes (all types of planes) to two servos for the ailerons. This is my first aileron airplane, I have made many large gliders and small 2 channel airplanes. What is the real reason for two servos? Is one not strong enough or are they too far apart and a long control arm might flex? I would love to not go with another servo, but I want to do what is right. I would really appreciate your opinions! Thank you.<br type=''_moz'' />
Keep it lite and keep it simple, I laugh when I see the "I upgraded to two servo's for ailerons"! Full scale aircraft use them and so should you. I use the fewest servo's possible on any build, bell-cranks are extremely reliable and maintenance free when installed correctly. If you are a sloppy builder or super lazy, then I guess they might be to much trouble, but I personally think installing a servo with a door is more work. ARF's started this out of ease of manufacture, but if you are building something use bell-cranks. I even use Bell-cranks in my ARF's when I bash them. The aerodynamics behind keeping the outer wing panels as light as possible is well known.
I made some custom bell-cranks for my 82" Corsair out of PC board, and it even uses scale hinging.