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HomeAircraftHelicopterHIROBOOther › EVO 50 Servos
02-07-2006 04:36 PM  12 years agoPost 1
The_Widowmaker

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Bear Valley Springs, CA

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I got my EVO 50 done and have a question on servos. I have a 9254 on the tail. I can't recall the model number on the front servos but they are JR digital with .18 response.

My question is what would be the benefit of faster servos up front, say 9254's ? I understand they are going to move from center to end of travel faster so I guess the first part of a manuever like a stationary flip would be faster but the after that initial increase in reaction the rest of that manuever would not be any faster. Am I wrong?

"I'm a Virgin.. I'm just not very good at it. "

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02-07-2006 04:44 PM  12 years agoPost 2
BarracudaHockey

rrMaster

Jacksonville FL

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9254's are tail rotor servos.

You want 9252s on cyclic and collective if you want Futaba digitals.

Digitals hold position better and generally react faster than analog servos. You didn't say what JR's your running, and torque is equally important or more so than speed.

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

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02-07-2006 05:10 PM  12 years agoPost 3
spritefiend

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Camarillo, CA

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if you have a gov that will support digital you can use one on the thr

SPECS: Speed: .14 sec/60 degrees (based on 4.8V rating)
Torque: 92 oz-in (6.6 kg-cm) (based on 4.8V rating)

thats the specs on a 9252, anything equivelent will be mmmNICE

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02-07-2006 05:10 PM  12 years agoPost 4
Cranium

rrApprentice

Orlando, FL

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The centering of digital servos is better than analog which is the reason to go with digital as I'm sure you know.

In my opinion the torque is the biggest factor to consider. When you push the servo in flight you want to make sure it will put it where you want and hold it there.

The speed of the servo is less important. If you want to do a stationary flip, you throw the stick to the top (or bottom) and hold it. The servo may have the capability to get there a few milliseconds sooner (not noticable) but the flybar paddle angles would be the same. So you are correct, the rates would not be affected.

Also consider that stick movements are usually smooth and not banging them around as fast as you can so the time you take to put the stick to the top would be slower than the servo is capable of.

If you are happy with the torque of the JR servos then I would see no reason to change them.


I do not fear computers. I fear the lack of them.-- Isaac Asimov

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02-07-2006 05:30 PM  12 years agoPost 5
The_Widowmaker

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Bear Valley Springs, CA

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My front servos are all DS811. I'm running 4.8 V so its .18 speed and 54 torque. I just don't want to waste money if these specs are sufficient.

"I'm a Virgin.. I'm just not very good at it. "

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02-07-2006 05:35 PM  12 years agoPost 6
spritefiend

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Camarillo, CA

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i ran a quick search on them and a few people are running 811s on an evo with no problems. id say go for it.

search term "ds811 evo"

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02-07-2006 05:47 PM  12 years agoPost 7
The_Widowmaker

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Bear Valley Springs, CA

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Thanks for the info.. gotta head to airport and will deal with this later.. thanks

"I'm a Virgin.. I'm just not very good at it. "

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