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HelicopterMain Discussion › BIG servo
03-15-2003 01:07 PM  14 years agoPost 1
helimanzero

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Lancashire UK

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yo, I have have 5 servos but one is bigger than the rest, i have mounted it to control the rudder is this right please???

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03-15-2003 01:17 PM  14 years agoPost 2
vfastr6

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Cape Town, RSA

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What servos are they? Futaba/Jr/Hitec?

What model number for each?

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03-15-2003 01:17 PM  14 years agoPost 3
James Cistola

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Orlando FL.!!!

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Boy, You need help !! And you don't know how much !!!
You need to put in more info. on what kind of servo !!! Are you using a gyro ???what kind? And what are you flying, Like that! all that you THINK
James

If it's worth doing, then it's worth over doing

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03-15-2003 01:19 PM  14 years agoPost 4
helimanzero

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Lancashire UK

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4 x JR nes 507 and 1 sanwa srm 102 which is controlling rudder

csm 180 gyro

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03-15-2003 01:36 PM  14 years agoPost 5
James Cistola

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Orlando FL.!!!

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Can't help I know of the J,.R. 507(old) servos, But I don't know a thing on the gyro or servos (sanwa-102) It's nice to have this two mach for speed and capability !! Sorry (good luck)
James

If it's worth doing, then it's worth over doing

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03-15-2003 02:11 PM  14 years agoPost 6
omurru

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Australia

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never heard of the sanwa one. Whats the heli. I'd say put the sanwa one on throttle and the others on everything else, 507 on tail, elevator, collective and roll.

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03-15-2003 02:16 PM  14 years agoPost 7
helimanzero

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Lancashire UK

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thanx omurru, i will put the sanwa (biggest one) on throttle

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03-15-2003 02:17 PM  14 years agoPost 8
Optech

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San Diego, CA.

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Helimanzero,
The only data I could find on the JR servos is the newer #527 at .25sec servo speed and 40oz/in torque. I doubt your older #507 is better than that.

The Sanwa 102 is a better servo at .22sec speed and .50oz/in torque.
EDIT:... The Sanwa 102 is basically an Airtronics 94102. Sanwa is the company that actually makes Airtronics radios.

Your in kind of a dilema here. You want the fastest servo on the rudder, which you have now. However, you would also want the strongest servo on the collective. As your 102 is both your fastest and strongest it can't be in both places at the same time.

You didn't say what ship you have. If its a CCPM ship, like the Venture, ( I assume you have a .30 size bird), or a fixed swashplate ship like the Nexus, then I would leave things like you have it. But if you have a "standard" control ship like the Shuttle, Sceadu, or Raptor, then I would replace the 102 to the collective and use one of the 507s on your rudder. I doubt you'll see much difference.

If your flying a .50 size anything, put the 102 on the collective and get some better servos all around. Or, at least some more 102s for the cyclics as soon as you can.

In any case, I would suggest you get a Hitec 525 as soon as you could afford it and put it on the rudder. Its inexpensive, has a ball bearing, is fairly precise, fast, and works perfect with your CSM gyro.

Hope this helps,
Mike

Viva La Airtronics!

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03-15-2003 02:40 PM  14 years agoPost 9
helimanzero

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Lancashire UK

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thanks optech,

I found that JR nes-507 servos have :

Torque - 3.10 Kg/cm

Speed - 0.27 sec/60 Deg

I have the Moskito sport II, will it be ok if i use the nes- 507 on collective, roll, throttle and elevator

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03-15-2003 06:47 PM  14 years agoPost 10
Optech

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San Diego, CA.

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Okay, The Moskito is a fairly large heli. Doesn't it have rocking trays to achieve the collective function???

I'm not sure of the conversion from kg/cm to oz/in but I think 3.1 is a touch better than the Sanwa 102 rating. So yeah, leave the Sanwa on the rudder.

BTW.... Cool heli, I've always wanted to try one.

Have fun.,
Mike

Viva La Airtronics!

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