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HelicopterMain Discussion › rudder servo
09-02-2009 08:40 PM  8 years agoPost 1
trickytiker

rrApprentice

england

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what is the app speed of a jr 8717 servo running 8volts and could it be used as a tail servo

i have problems with spelling

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09-03-2009 10:38 AM  8 years agoPost 2
trickytiker

rrApprentice

england

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is this a hard question

i have problems with spelling

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09-03-2009 01:14 PM  8 years agoPost 3
BarracudaHockey

rrMaster

Jacksonville FL

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I personally wouldn't run a servo at a high frame rate, at that voltage and don't see a need to.

Andy
AMA 77227
http://www.jaxrc.com

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09-03-2009 02:54 PM  8 years agoPost 4
chopper_crazy

rrElite Veteran

Delphos, Ohio

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I wouldn't use it on a tail but here are the specs:

Specs
Type: Ultra Speed Heli Cyclic Servo
Torque: 160 oz/in @ 4.8V; 196 oz/in @ 6V
Speed: .09 sec/60° @ 4.8V, .07 sec/60° @ 6V
Dimensions (WxLxH): .83" x 1.59" x 1.57"
Weight: 2.36 oz
Gears: Metal

It's a complex, costly, glow powered anti-gravity machine!

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09-03-2009 02:58 PM  8 years agoPost 5
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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I use my 8717s on a direct 2s lipo setup with no issues. I also don't use one on the tail. I have a 9256 and a BLS 251 to do those jobs.......Ron

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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09-03-2009 08:28 PM  8 years agoPost 6
MartyH

rrProfessor

USA

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I wouldn't use an 8717 on 8 volts on the tail. Heck They're stupidly fast and strong on 6 volts in the normal positions.

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09-04-2009 09:21 AM  8 years agoPost 7
dialarotor

rrElite Veteran

Traverse City, Michigan

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If you have one just sitting on the workbench and need a tail servo, yes it would be fine, overkill but fine and as stated, no need to cook it at 8V.

RapRexSynLog Pilot

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09-04-2009 04:37 PM  8 years agoPost 8
trickytiker

rrApprentice

england

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i may try one to see the how it works i usually use bls 251
or jr 8900

i have problems with spelling

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09-04-2009 05:02 PM  8 years agoPost 9
jschenck

rrProfessor

La Vista, NE.

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I would be nice to have a tail servo that can take straight 8V with the high frame rate and 760 signal - a high voltage setup with no regulator. My current thought and direction is 2S Li-FePO4 batteries and servos that can run 7V.

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09-04-2009 07:28 PM  8 years agoPost 10
Git

rrVeteran

Brunei

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I would be nice to have a tail servo that can take straight 8V with the high frame rate and 760 signal - a high voltage setup with no regulator. My current thought and direction is 2S Li-FePO4 batteries and servos that can run 7V.
align is coming out with ds650 i think.. ridiculously fast looking at the specs at align website. if its running the same components like the 610/620, they should, in theory, be able to handle 2s unregulated as well.. like so many are doing to their cyclics including me plus at the tail, there'll be less load. its not stated that its 760us though..

Alees Rush 750

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