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HelicopterMain Discussion › HV throttle servo
06-17-2014 03:31 AM  3 years agoPost 1
OT45

rrApprentice

Kingston, NY

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I need to get a new HV throttle servo for my nitro. My hyperion atlas failed in flight. I'm running 2s lipo and sk540 governor. What do you guys recommend? There seem to be a lot of new choices out there since I last bought anything HV.
Reliability and reasonable price is a must. Anyone using the spectrum h6160hv?

scratch building is not just for planks

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06-17-2014 03:46 AM  3 years agoPost 2
John Krebs

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Pittsburgh, PA

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I use the Futaba S3051HV. I think it was $39.95. Runs on straight 2S LiPo.

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06-17-2014 04:19 AM  3 years agoPost 3
3dgimble

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Rochester

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I do 3D, I used a SK540 for about a year, used a fast tail servo for my throttle. Some guys use slow or less than cyclic slow servos, but I think that may contribute to poor governor performance.

I use a Fut S9254 with a Stepdown Pro(its good value, very small, will regulate from 6-12v down to 5v very reliably).
If I had a more pricey choice I would go with something that has nylon gears, fast and HV, but what I have is more than good enough for doing 3D.

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06-17-2014 06:11 AM  3 years agoPost 4
Brett C

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PHOENIX, AZ, USA

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Futaba 3072 HV has worked well for me. I think it's 40-50 bucks. If your into hardcore 3D, i hear it's good to match the cyclic. With my flying style i don't know if i could tell the difference.

Nitro will never die!!!

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06-17-2014 12:17 PM  3 years agoPost 5
Richardmid1

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Leeds, England

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I run a very small 2-6s input 5v output BEC to an Align DS655. Works a treat and saves some money!

60% of the time, it works every time!

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06-17-2014 07:14 PM  3 years agoPost 6
OT45

rrApprentice

Kingston, NY

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Thanks for the input guys. I'm not adding any regulator. less stuff to go wrong.
BTW, how do you know if the gain is correct on the throttle? I left mine stock, I think at 50% if I remember correctly and it flew fine with that for at least one season. No surging or odd response noted except just before it failed. One brass servo gear was very worn in one spot on the failed servo. Indicating it did a lot of work. Maybe too much at the idle up setting?

scratch building is not just for planks

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06-17-2014 07:30 PM  3 years agoPost 7
3dgimble

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Rochester

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One brass servo gear was very worn in one spot on the failed servo. Indicating it did a lot of work
That is why I believe a nylon tail servo is better suited.
Besides the regulator I mentioned runs inline between servo and fbl, no additional leads needed. Its invisible almost.

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06-17-2014 09:52 PM  3 years agoPost 8
Dan Minick

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Columbus, WI

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MKS 767. All metal gear and case. Works a charm.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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06-19-2014 03:21 AM  3 years agoPost 9
haha

rrApprentice

Woodstock,GA

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jr 8717 hv, works extremely well

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06-19-2014 11:34 AM  3 years agoPost 10
Richardmid1

rrProfessor

Leeds, England

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Hitec HS5565MH, would be the most cost effective option and it has 0.09 speed at 7.4v!

60% of the time, it works every time!

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06-19-2014 05:21 PM  3 years agoPost 11
ticedoff8

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Morgan Hill, CA. USA

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BTW, how do you know if the gain is correct on the throttle? I left mine stock, I think at 50% if I remember correctly and it flew fine with that for at least one season. No surging or odd response noted except just before it failed. One brass servo gear was very worn in one spot on the failed servo. Indicating it did a lot of work. Maybe too much at the idle up setting?
Assuming this servo was new when you mounted t on the heli (as a throttle servo) I would suggest the throttle linkage / carb barrel might be stiff and hard to rotate.

If the engine is tuned up nice and strong, then too much gain will cause the tail to vibrate - like too much gain in the tail rotor gyro. But it will be most apparent at a hover.

But, if the linkage / carb is stiff, then the gain will have little affect - the servo is working too hard to.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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08-14-2014 10:33 PM  3 years agoPost 12
OT45

rrApprentice

Kingston, NY

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Just an update, I have settled on the spectrum h6160hv servo for the throttle. So far works well. I have flown about 5 gal of fuel since the install and kept the stock setting of 50 for the gain on the sk540. I'll let you know how it holds up...

scratch building is not just for planks

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08-14-2014 11:31 PM  3 years agoPost 13
rhodesengr

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Pleasanton, CA USA

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take a look at the Protek servos on Amain. The 250T is technically a cyclic servo but would make a great throttle servo. The 230S is technically a tail servo but would also be a great throttle servo. It is also on sale right now. If you are using a governor, some people argue that a tail servo is good for the Throttle because it can take the constant electronic updating.

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08-15-2014 05:34 AM  3 years agoPost 14
3dgimble

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Rochester

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Sorry rhode but, stay away from the 230S. serious problems with failing, to back me up look at the price of it, its down to $50 for it and no one is buying it. The 230T cyclics are fine just the tail.

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08-15-2014 09:43 AM  3 years agoPost 15
cabeng

rrApprentice

South africa

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http://www.hobby king.com/hobby king/store/__24764__TGY_306G_HV_High_Voltage_Ultra_Fast_High_Torque_MG_Digital_Alloy_Cased_Servo_3_7kg_05sec_21g.html

Best Throttle servo , I have well over 200 flights on my 700n and 100 flights on my 600n , multigov pro on 600 and cgy 750 on 700 , works a charm and does not miss a beat!!

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08-15-2014 05:13 PM  3 years agoPost 16
rhodesengr

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Pleasanton, CA USA

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Sorry rhode but, stay away from the 230S. serious problems with failing,
How about the 250S? Does it have failure issues like the 230S? My 250S has been working fine. I though the only difference between the S and the T was the case.

Can you point me to the evidence about 230S failing? I'd like to read through that.

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HelicopterMain Discussion › HV throttle servo
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