FlyBoyDavid

I'm in the process of building a Lanier Stinger .10 with an OS .15. I've got some HS-55's laying around. Will they be enough for the Stinger? I plan on using 1 for each aileron. I know that shouldn't be a problem. What about the elevator and rudder? I've also got some HS-81's I could use. What do you think?

Thanks for the help.


David

jetranger-RCU

My Feedback: (1)

Those servos are made for park flyers they won't hold up at all. The 81,s should be fine, I have hs60,s in my stinger 10 one in each wing because they are small

FlyBoyDavid

HS-60's have .2 oz more torque than the HS-55. Is it just because they are bigger?

efarmer

HS-55s are pretty beefy... they'll work just fine. I have put them in 170mph electric planes with no problem at all, as well as on 30" long 2" chord flapperons... again, no problem.

A step above the HS55 is the JR 241... killer little servo. Very tight geartrain, good power, good centering.

Best,
Eric

AndyW

My Feedback: (1)

It appears that the HS 55s ought to be OK on a .10 size plane, especially if you are using one for each aileron. HOWEVER, my concern is that, like the HS 50s, they have no grommets. It APPEARS that both were intended for electrics and not for IC engines. I've got one 55 and three 50s that I'm ready to unload for that reason. Not to mention the ridiculous, skinny little servo arms and the skinny, ridiculous mounting lugs. What were they thinking of?

FlyBoyDavid

I've used them in 90mph electrics. Twister to be exact. I've just never used them with tail controls this big. I think I'm going to use 81's for the tail and 55's for the ailerons and throttle. If it doesn't work. It'll be a lesson learned. Thanks for the help.

David

goldguy

Those 55 many put out the touque required, but what about those tiny little teeth on the gears and the hard mounting. That would be my concern.

I would go with the 81's.

AndyW

My Feedback: (1)

Frank,

Good point about the gears. Another concern when running glow.

FlyBoyDavid

Excuse my ignorance. This is my first glow built plane(not first flown). What do the teeth of the servo have to do with the plane being glow or elctric?

goldguy

Those HiTec 55 servos have very tiny little teeth on the servo gears and that is what transmits the power from the motor to the out put arm. Those teeth will not take much of a load before they strip and if it happens in flight, you will land permanently!!!

The reason I mention this is my experience with their older 80 and 101's, always carried extra gears with me. Just bang the rudder on your tailgate when getting it out of you vehicle and you were replacing the gears.

The teeth in the newer 81's seem to be moulded of the same material, but I have had no problems with stripping gears. The great thing about these servos is their versatility, you can use them in small 1/2A and 15 sized models.

AndyW

My Feedback: (1)

The difference between glow and electric is that glows transmit a great deal of engine vibration to the servos and all their components. Say your .049 does 16,000 rpm. That's over 4 explosions of the combustion chamber per second. Your control surfaces have weight and the vibration induced into them will transmit down your pushrods and into the gear train. This will cause your motor brushes to see a tiny oscillation of the motor shaft and see more wear than they might,,, etc, etc. There's a very good reason that servos have always been offered with grommet mounting. By some complex mix of physics, engine vibration might not be such a great factor in very small servos and control surfaces but I doubt that anyone has done the science to prove that. Why take a chance for the sake of grommets worth .005 cents?

FlyBoyDavid

goldguy,
I've stripped a few 81's and 55's myself. All on elctric planes. Not one of them was stripped in flight. All because I banged the controll surface or pulled on something a little too hard. So I know how that goes.

Thanks again for the help. I apreciate it.

David


Build to fly. Not to crash.