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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › What is the best servo to use with CSM 720?
02-09-2006 10:54 AM  12 years agoPost 1
nicco

rrVeteran

Sweden

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Is it JR 8700G or Futaba 9251?

Or something else?

/N

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02-09-2006 10:55 AM  12 years agoPost 2
jb_turner

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USA

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Well the JR Guys will say the 8700 and the Futaba guys may say 9251.

JB "Do a SEARCH" Turner

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02-09-2006 11:48 AM  12 years agoPost 3
davehour

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Guayama, Puerto Rico 00785

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02-09-2006 08:08 PM  12 years agoPost 4
I3DM

rrProfessor

Israel

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9251 is the best. at least from my expirience.

www.liorzahavi.com

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02-09-2006 08:56 PM  12 years agoPost 5
DOKEY

rrProfessor

Northamptonshire UK

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JR 8700g, Futaba 9251 and the 9256, seem to be the common servos for this gyro.

I have used both the Fuataba's and I am perfectly happy with them.
(although they do require a little different setup between the two)
I would put my money down on a 9251 as being my first choice I think.

Ryan.

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02-09-2006 08:57 PM  12 years agoPost 6
Dorset Boy

rrApprentice

Dorset England

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9251 gets our vote

Century Helicopters, Coolpower Fuel, Flight Power Batteries, CSM Gyros, Futaba from Hobby Hangar

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04-10-2006 05:34 PM  12 years agoPost 7
3drcheli

rrNovice

West Sussex, UK

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I am just in the process of choosing a new gyro to swap for a 601 and was curious as to why you choose a 9251 over the newer 9256.

Just hoping I have better luck with the 720 than the 560 in my Bergen 90s. The piro consistancy was great, but I just couldn't get the tail to hold (?!) I will be getting a new servo aswell because my 601/9251 will be swapped out for a 401/9253 in another heli.

I find piro walls of death hard enough with the 601 let alone the 401, so great piro consisitancy is what I am after - err and some time/weather to practice.

Kevin

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04-10-2006 06:28 PM  12 years agoPost 8
DOKEY

rrProfessor

Northamptonshire UK

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I imagine that most pick the 9251 over the 9256 as they have the 9251 from the 601 gyro.
From my style of flying I can not easily tell a difference in performance from the 9251 to the 9256.
I find piro walls of death hard enough with the 601 let alone the 401, so great piro consistency is what I am after - err and some time/weather to practice
You will certainly enjoy the 720 as the piro consistency is certainly better than the 601 from my experience and the tail is locked in at all times like the 601.

Ryan.

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04-10-2006 11:03 PM  12 years agoPost 9
raptorheli2

rrElite Veteran

rip off britain and no changing it

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i've treid 9251 and 8700g on my 720.not much difference if any performance wise. but i had seven 9251 servos in 2 years (some wore and some failed early on) so i stopped using them, went to 8700g and won't be going back.

cheers


www.waterfoothelis.com

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04-11-2006 12:45 AM  12 years agoPost 10
Yug

rrMaster

UK. Herts

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Never had a problem with 8700G apart from gear wear. Unfortunately, I've heard of several failures with the futaba servos, and only one with the 8700.

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04-11-2006 12:52 AM  12 years agoPost 11
bobj

rrVeteran

United Kingdom

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Hi

All tail servo's fail eventually, vibration or a poor set up can kill them quickly or ingress of oil on a rear mounted servo.
The higher the performance of the servo then the more it is open to abuse, the 9251 and 9256 just plain work quicker than the 8700 so will/can wear quicker, vibration getting to the gyro will keep the servo
extra busy so cause a 9251/56 to run hot and shorten it's life.

BTW the 9251 works Very well with the 720, would expect the 9256 to be as good if not slightly better.

Cheers
Bob J

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04-11-2006 12:57 AM  12 years agoPost 12
Yug

rrMaster

UK. Herts

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Good point Bob.
Oil ingress can be a major problem although I've never had it cause a failure. Something I've been meaning to try is using a large disc to help shield the shaft from oil.

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04-11-2006 01:12 AM  12 years agoPost 13
MJA

rrKey Veteran

UK

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I have used the 9251 and 8700G with the SL720 that's on my Evo50.There was a performance edge with the 9251 but it wasn't massive compared to the 8700G.What i did think was disappointing is the 8700G didn't save as much battery power per flight as it does with the SL560
(when comparing it to a 9251 GY601 combo used in same heli
),so i'm going to be sticking the 9251 back on the 720.

Martin

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