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HelicopterRadio - Servo - Gyro - Gov - Batt › 9254 for throttle?
03-17-2009 09:56 PM  8 years agoPost 1
Blackhawk6

rrVeteran

Livonia, Mi

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Is the 9254 a good for a throttle servo? I've seen it done alot but is it a good move? I have a GV-1 on my 600 and the governor manual says to use a faster servo. Do I need anything more than the 3151 that I'm currently using?

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03-17-2009 09:59 PM  8 years agoPost 2
jsenicka

rrProfessor

Eagle River, WI

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Monster overkill, plus you then need to worry about voltage to the throttle servo...

I run .16 servos across the board for throttle on all my governors

Jim Senicka
Team Manager, GrandRC Flight Team

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03-17-2009 10:01 PM  8 years agoPost 3
canbarelyhover

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Sunnyvale, CA

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speed aside, is there any benefit to running a digital servo on throttle?

Citizen #830

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03-17-2009 10:47 PM  8 years agoPost 4
phil evon

rrApprentice

Central New Jersey

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using a 9254 would be pointless. the servo speed is much faster than the engine can respond. plus, i believe the 9254 is only able to be used with a gyro because the gyro converts the signal to the proper pulse rate. it would probably burn up in a short time running right off the receiver.

AMA 125840

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03-17-2009 10:57 PM  8 years agoPost 5
BarracudaHockey

rrMaster

Jacksonville FL

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Thats not true of the 9254 it "will work" but like Jim said, its monster overkill. The GV1 can't operate fast enough to take advantage of a high speed servo and theres no point yanking a throttle arm back and forth faster than an IC engine can respond to throttle changes.

Its the 9251, 9256, and BLS251 that have to be hooked up to a gyro that supports 760us center pulse.

In short, you wont gain anything over a 3151

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

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03-18-2009 12:02 AM  8 years agoPost 6
phil evon

rrApprentice

Central New Jersey

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i wasnt to sure about the pulse rate..thanks for clearing that up but the response rate of the engine itself wont keep up with that servo anyway.

AMA 125840

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03-18-2009 12:43 AM  8 years agoPost 7
Blackhawk6

rrVeteran

Livonia, Mi

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Thanks guys! I saw that the GV-1 recommends a servo that has a speed of .16 or faster. Is the 3151 going to be ok, or should I invest in something else?

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03-18-2009 12:52 AM  8 years agoPost 8
Mizark

rrApprentice

Sydney, Australia

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The 3151 will work fine but its up to you whether or not you want to spend the extra cash.

The other guys are right, the motor cant respond fast enoughso a ultra quick servo doesnt do anything. I have tried different servos on throttle in the past & you cant notice the difference.

Personally, I run 9254's in my 600N & N9. The way I look at it, if I am running all this good gear (other electrionics) why skimp on the throttle servo

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03-18-2009 01:05 AM  8 years agoPost 9
Blackhawk6

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Livonia, Mi

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Great points! Thanks a lot!

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03-18-2009 01:10 AM  8 years agoPost 10
deafheliflyer

rrKey Veteran

Arizona

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hi

so.. with the GV-1, anything below .18 doesnt do crap... With the Multigov, the faster, the better??? In other words, with the Multigov, .06 would be noticable versus .18??

Im running a 9252 with MultiPro Gov

Michael

Crash-Prone and overcoming it!!!

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03-18-2009 09:26 AM  8 years agoPost 11
Chickenrun

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Lincolnshire England​UK

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Can any engine follow at the higher servo speeds ???

Cheers

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03-18-2009 12:31 PM  8 years agoPost 12
BarracudaHockey

rrMaster

Jacksonville FL

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You may be interested to note that Bob dropped super servo mode on the Multigov. Why? Because its simply not needed.

The throttle servo has no load.

The throttle servo only moves a small portion of its travel in idle up.

And agian, no matter how fast you yank the throttle arm around a carborated engine can only respond so fast to throttle changes.

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

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03-18-2009 02:53 PM  8 years agoPost 13
Pinecone

rrKey Veteran

Maryalnd

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You can save some cash and weight by going to a mini or even micro servo.

You can pick up a DS285 pretty cheap and it fits sideways in the hole for the standard servo without any adapter or mod.

Terry
Blade CP Trex 450 SE
QJ EP8v2 EX Gaui Hurricane 550
Vibe 50 Bergen Intrepid Gasser

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