MarcusJsutton

After progressing through high wing trainer, to a small scale low wing aerobatic and a medium scale warbird, I have decided to move on to slightly larger and more capable aerobatic models, and have recenly bought a 65" span Flair Giles 202 (ARTF....too lazy to build, sorry!!), and an OS 120FS to pull it along. In terms of servo requirements, I hear different opinions from different people. Some say Standard servos will be fine, some say I should get a high torque one for the elevator, and some say I should be using high torque all over (with the obvious exception of the throttle!). Others seem to think I should be using digital servos all over, but financing that seems a little frightening! I'll be putting a Futaba reciever in it, so would prefer to go Futaba for servos too. Are there any aerobatic guys out there, who have experience of similar models, able to offer some advice? Thanks. Marcus.

shaun1

Hi Marcus,

I would recommend futaba 3001's as they are ball raced, fairly quick and have 3 kg's of torque for less than £10 (www.alshobbies.com). Digitals are good servos but come with a price and may not make significant difference to you at this moment in time. If you want a servo with some extra torque on elevator I would use a JR 591 which have 5 kgs of torque and they have compatible plugs with futaba receiver and are only about £13.

Hope this helps

Regards

Shaun

MarcusJsutton

Thanks Shaun for that. Most people that I speak to think that standard servos, or perhaps 3001s will be enough. I'm just a little wary that some say go high torque, some say go metal gear, and some say go digital. I think I'm tempted to go for 3001s on everything except the elevator, where I'll put a high torque metal geared one to be sure!

Cheers,

Marcus.

shaun1

Marcus,

The metal gear servo to get is a hitec hs 625 mg, amazingly quick and upto 7 kilo's of torque. I never risk standard hitecs but there specialised servos are fantastic they are around £29.

Regards

Shaun

MarcusJsutton

Wow, that was a quick reply! Thanks again,

Marcus

Geistware

My Feedback: (16)

I would recommend using your standard servos on 6 volts.
This will give you 52oz-in of torque which should be more than enough.
I did this until I went to planes larger than 1/4 scale.

kris1

Marcus

If you haven't made the plunge yet, I have just completed and flown mine. YS 120 and servos are hetec 300 for thottle, Hitec 525 for ailerons, Hitec 605's for rudder and elevator. I am running them on 6V. It will happly climb on K.E. but have not tried K.E. loops yet.

Cheers

Kris

FHHuber

Normally, the rudder is the first place you need a stronger servo.

The ailerons tend to get the extra power needed by getting the dual servo treatment.

The rudder has to deal with the tailwheel (or nosewheel) loads... and its often got more area than the elevator. Rudder has always been the surface I've had the most trouble with preventing flutter on when using standard servos... and I tend to put a 70 in-oz there while still using a S-3004 on elevator in a .60 size model.