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Gasser Helicopters Gasser Specific Discussion


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Old 11-20-2012, 04:50 AM   #1
acrow
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Default Throttle Servos For Gassers

Hello Gasser RC Heli pilots.

I have searched the forums and haven't found any recent discussions on suitable throttle servos for gassers.

What I'd like to see is:

1) What qualities are needed for a gasser throttle server.

2) Recommended throttle servos for low voltage (nom 5 volts).

3) Recommended throttle servos for LiFe(2S).

4) Recommended throttle servos for LiPo (2S).

A discussion in one thread should be useful for newcomers to gassers and others needing to replace throttle servos.

Regards

Acrow
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Old 11-20-2012, 05:32 AM   #2
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I think you don't see much discussion since it is not a highly stressed servo. I grab used cyclic servos I have kicking around, DS610, DS620, S9452 have all worked without issue. On any heli with a governor, you do need reasonable speed for the servo to react quick enough. Just because gassers are not cheap, I would not use a cheap servo on the throttle.

Linkage on a gas servo is important.
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Old 11-20-2012, 05:36 AM   #3
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Quote:
Originally Posted by fastflyer20 View Post
I think you don't see much discussion since it is not a highly stressed servo. I grab used cyclic servos I have kicking around, DS610, DS620, S9452 have all worked without issue. On any heli with a governor, you do need reasonable speed for the servo to react quick enough. Just because gassers are not cheap, I would not use a cheap servo on the throttle.

Linkage on a gas servo is important.
+1

I use DS650's on my 2 gassers. Over 2 years and no problems so far.
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Old 11-20-2012, 08:00 AM   #4
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+2
I run Futaba BLS 451 on all my Gassers at 8.4V.
Works fine. No Failures.
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Old 11-20-2012, 10:51 AM   #5
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As I'm running Savox servos, I went it the SC-0352 Digital servo


Dimensions(mm):* 40.7X20.2X39.4
Weight(g):* 42.0
Speed(@4.8V sec/60):* .16
Torque(@4.8V oz-in):* 58.3
Speed(@6.0V sec/60):* .13
Torque(@6.0V oz-in):* 90.3
Gear:* Industrial Plastic
Bearing:* 2BB
Case:* Plastic

All for $27.00

Powered with a LiFe 2100mah pack.

Works for me
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Old 11-20-2012, 07:56 PM   #6
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I plan high voltage system as I already have 3 HV for cyclic, I made a long search and I bought this:

Hitec HS-5495BH Digital Standard High Voltage; 23,95$ + 7$ shipping.
Karbonite gear
Speed: 6.0v / 0.17 sec/60
Speed: 7.4v / 0.15
Torque: 6.0v, 88oz
Torque: 7.4v, 104oz

I don't know if it's good, other HV option are 4X this price.
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Old 11-20-2012, 08:33 PM   #7
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Hyperion make some nice servos, they have HV ones that are less than $40. Not tried their STD size ones, but no issues with their mini or micro versions.
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Old 11-21-2012, 01:40 AM   #8
acrow
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Thanks for the replies so far.

I was hoping there would be more discussion on nylon gears versus metal and things to watch out for due to additional vibrations from gasser engines.

Regards

Acrow
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Old 11-21-2012, 08:07 AM   #9
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From what I have read, most of the time guys seems to use what they have laying around for throttle servo, and it's often plastic or carbonite gear. I read a few case of stripping metal gear, I can guess it's due to the gear ratling with vibration, but other have reported good success with metal gear, I can't comment further, I don't have any experience with this.

I would like to read here some experience with metal gear also.
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