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HomeAircraftHelicopterMain Discussion › which Futaba digitals for eCCPM ? best performance needed..
05-06-2005 12:15 AM  13 years agoPost 1
I3DM

rrProfessor

Israel

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Hello guys,
i was thinking of trying either 9350 or 9451 servos (can use 6V) on one of my (soon to be bought) Furies - what do you guys think ? ill have another heli with 94758Z servos, it could make an interesting comparison !!

has anyone tried any of these before ?
thanks.

www.liorzahavi.com

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05-06-2005 12:46 AM  13 years agoPost 2
Dr.Ben

rrMaster

Richmond, VA, USA

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The 9350's have been used on collective in mCCPM machines long enough that I think they can be trusted. I not seen a posted in recent memory where one had puked on someone. I know that some guys have used the 9451's with no issues, too. JK had them in a R50 on 6V at IRCHA '04 and they were blazing fast. The stats are almost a wash, with the 9451 being 2 1/100's faster faster with about 10 ounce/inches less torque. In an eCCPM model where collective and cyclic loads are shared, I suppose you might choose the 9451 since it is a little faster and you are comparing to the speedy ATX servo.

Don't ignore the 9351 either. It's the slowest of the three at 0.13s/60d at 6 V, but BRUTALLY strong at 192 oz/in of torque. That ought to give you enough collective power.

Ben Minor

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05-06-2005 12:53 AM  13 years agoPost 3
I3DM

rrProfessor

Israel

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interesing Ben, thanks a lot for the input.

so fat the 9451 has my vote.. due to speed.

anyone else care to share comments ?
thanks.

www.liorzahavi.com

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05-06-2005 01:06 AM  13 years agoPost 4
Dr.Ben

rrMaster

Richmond, VA, USA

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ESPECIALLY, someone who has a lot of time on a set please comment on geartrain longevity. I know that Futaba specifically addressed this issue with the 9255's. Mine are holding up well. The 9451's, etc are task designed car servos. I'm not sure how Futaba looked at gear wear in the car servos. I'm no driver, but I would think that a fuzz of backlash on car might have a few less ramifications than it does on an eCCPM set up where all three servos need to be dead nuts as long as possible. Indeed, I'm at a loss to find an servo application in the modeling world so completely hypercritical of servo performance as eCCPM, at least if you're looking at the fine details of interaction, set up and longevity of said set up. Yeah, planks guys gang servos on a surface, but at least that surface pivots on one hinge line in only one dimension.

Ben Minor

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05-06-2005 01:17 AM  13 years agoPost 5
steve9534

rrKey Veteran

yakima, wa.

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Servos
I haven't tried the 9451's but I do believe that they are the successors to the 9450 servos which I had 6 of. All of the 9450's wore out the gear train to the point that the servos were failing in flight in less than 2 years. I have a 9350 on collective in my R90 and it's going strong at about 1 year and many, many flights. Hope this helps. steve

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05-06-2005 03:07 AM  13 years agoPost 6
KC

rrElite Veteran

WA

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Lior, I use 9350s as collective servos in my raptor 50 and 90, they have held up well and are under more stress than they would be in eccpm.

the 9350 is 0.11, kinda too fast for a collective servo unless you use one for the throttle too ($$$), I get around the speed by using a 9252 on throttle at 95% atv and I use 140-150% atv for the 9350.

I like to trade the speed for the resolution as I find a lot more collective control in using full atvs anyways, and the throttle isnt behind when I need a fast delivery.

fwiw, my furies had 9252s and were trouble free, 290 flights in less than 6 months on one of them. all my other servos in my raptors are 9252s.

9252s are a sort of modern 9202, maybe not sexy or fast, but I just stick with them because they have done me well for a couple years now.

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05-06-2005 07:20 AM  13 years agoPost 7
mainshaft

rrNovice

Bangkok Thailand

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Try s9351. It is better than 9451 or 9350. I'm using with my Tempest with 4-cell pack. Almost none of swashplate interaction.

Mainshaft

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05-06-2005 10:39 AM  13 years agoPost 8
I3DM

rrProfessor

Israel

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thanks guys.
where can i see specs of that 9351? havent seen it online.

www.liorzahavi.com

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05-06-2005 10:47 AM  13 years agoPost 9
mrNoodles

rrProfessor

Borlänge, Sweden

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05-06-2005 10:51 AM  13 years agoPost 10
I3DM

rrProfessor

Israel

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That 9351 looks impressice with 0.13 speed and 192 oz\in ! (for 6V).

my next question would have to be - do the 9350, 9255, 9351, 9451 have different gears ? arent all of these metal geared (maybe the 9255 isnt) and thats it ? how can one wear more then the other ?

so far the 9451 still wins as far as speed and torque, but you guys got me thinking about longeity.. has anyone tried 9451's on eCCPM ?


here is the optimal dada for these servos:
9350: 139 on\in, 0.12 (6V)
9351:192 oz\in, 0/13 (6V)
9451: 121 oz\in, 0.10 (6V)
9255: 112 on\in, 0/17 (4.8V)

www.liorzahavi.com

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05-06-2005 01:42 PM  13 years agoPost 11
armageddon

rrVeteran

N. Y.

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4 x 9451's on My Predator Gasser SE (eCCPM) and they are
perfect.

.

WHAT SIGNATURE?

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