mduslick

My Feedback: (1)

Hello my wonderful RC family! I was wondering if anyone could recommend a minimum toque rating for a nose-wheel servo when used in a pull-pull cable steering setup. The plane should weigh around 12 to 14 lbs approximately and be a trike configuration. Retract is Robart 710RS with a trailing link strut (haven't decided on mfg yet)... and nose wheel diameter will either be 2-1/4" or 2-1/2". Also, will be taking off and landing on relatively smooth grass strip.

P-Y

My Feedback: (1)

The torque requested depends of your runway.
A grass' runway require more torque than a concrete one.
Anyway, I would say that any high torque servo would do the job.

mduslick

My Feedback: (1)

yep, it's a grass strip... by high torque, do you mean 60 oz-in, 80, 100, or what?

P-Y

My Feedback: (1)

I use a 100oz/in on one of my plane, but around 70 should probably be enough.

mduslick

My Feedback: (1)

by the way... are you using air-up/air-down, or air-up/spring down on the plane?

mandtra

My Feedback: (29)

if it were mine i would go with a metal gear servo , in the grass and landing in a crosswind there will be a lot of stress on the front wheel you can get a HD 1501 for around $ 18.00 from TBM or plane addicts ,

mduslick

My Feedback: (1)

Wow! I just checked planeaddicts... 215 oz-in for $18.00?!?! I hate to ask but is there a catch?

mandtra

My Feedback: (29)

there are probably 50 of those servos at our flying field in everything from a 40 size to a 35% IMO there the best off brand avail. As always ***buy the best you can afford*** but those will do a fine job IMO

Steve Percifield

My Feedback: (14)

Actually, in your instance torque is not that great. You need to use metal gears with a ball bearing out put. Anything around 50 oz/in would be adequate.

mduslick

My Feedback: (1)

gotcha. Now as for the steering cables, is there a good tecnique for getting the tension just right? The 710RS is spring-down and as I understand it, if there is too much tension on the cables, the gear may not lock in the down position, and of course if it is too loose, it will look like the pilot spent too much time with his ole pal Samuel Adams!

mandtra

My Feedback: (29)

I dont know what your talking about HD 1501's have 234 oz at 6v

mduslick

My Feedback: (1)

From website:
>>>"Power HD -1501 MG OUT OF STOCK
HD-1501MG 236 oz analog servo with universal connector.

-Uses ONLY MPI FUTABA arms.

-Operating Speed: 0.16/0.14 sec/60°
-Stall Torque: 215oz-in. at 4.8v, 236 oz-in. at 6.0v
-Dimensions: 40.7x20.5x39.5 mm
-Weight: 60(g)
-Operating Voltage: 4.8/6.0"