hitcttd

My Feedback: (8)

Hey,
First of all i dont think i've ever been the first to respond before...

Here are some guidelines for servos, i think they are the same for 26cc and 50cc

for all surfaces -
- Metal gears are crucial
- Transit time of less than .14, .12 or less is ideal
- At least 111 ounces of torque - (different for rudder)
- Digital for smooth movement, not a MUST but really nice

For Rudder
- Quick transit time - .12 or less
- Loads of torque 140oz +
- I like to use a high quality one here

Elevator
- Quick transit time - .12 or less
- Not TOO much torque, since each elevator has it's own in most cases... ohhh 120oz+
- I like to have digital servos here as well

Ailerons
- Transit time can be a little less, mine are like .15
- A little more torque than elevator, 3d planes generally have HUGE ailerons - 120oz+
- Speed isn't too important, but nice to have .15 or less

Throttle
- important, engine vibrates like mad, get a good servo here HS 81 MG i like

Things to remember
- 3D flying is all about rudder and elevator -- ailerons are used a lot but don't do the kinda of stuff the tail surfaces do
- Use quality servos -- metal gears are really good to have. I've come to find that most JR SPORT servos don't really cut it
- Gas engines vibrate tremendously, so i really really highly recommend metal gears
- Digital servos are really nice because they are really smooth
- Coreless servos are really nice for the same reason

Here is the setup i have on my funtana (comparable to a 26cc plane)

Rudder - Hitec 9525 - $100 / 131 oz torque / .1 transit time (i'm really skating on thin ice with that low torque, but i love the servo... It's a digital coreless, it's friggin smooth, and friggin fast, jesus christ it's nice

Elevator - Hitec 5625 - $55 / 130 oz torque / .12 transit

Ailerons - Hitec 5645 - $55 / 160 oz torque / .16 transit

Throttle - hitec 225

On my 46CC gasser i have JR 2721 coreless servos all the way around, they are so smooth it's sick

for FUTABA, a lot of people at my field use Futaba's 9451 series, good speed, okay torque, not sufficient for rudder though....

If cost is an issue, you can get Hitec's 625 servos, they are about 30 dollars and have good performance for the price, in fact, they meet all of the criteria i mentioned... A lot of people use them... My friend has them in his showtime 90, works great and more!

.2 or more transit time is too slow for 3d i think

That's all i got for now

hope this helps

Have FUN!