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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › S9252 or DS8311 what to do!
02-10-2006 12:35 AM  12 years agoPost 1
Wantobe3D

rrNovice

N.W. Ohio

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First helo Evo50 Hyper50 401 with9254 funtech, need help deciding what servos to finish with, i hear both are good. plan on using futaba 8u super

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02-10-2006 04:51 AM  12 years agoPost 2
jjay

rrNovice

San Diego, CA - USA

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S9252 or DS8311 what to do!
I have used the 9252's. The 8311's, I have not used but I get a lot of questions reqarding them at the local hobby shop that I work at. Bottom line they are about the same, I don't recommend the 9252 on your collective. I went with 9252's all around with the 611 for the tail because other people used the same setup and had good results. After a couple of flights with my 9252's I had a really bad crash. I started to question a lot of factor's (lock-out, power failure, Etc.) But after tearing my heli apart I found a faluire on the 9252 controlling my colllective. the servo was destroyed, down to the shaft's inside the casing. From the crash I witnessed, I am very sure that the servo gear had split right down the center, nothing that quality control can correct. I am still faithfull with the 9252 servo, but with the collective, I wouldn't use anything but a metal gear. I am willing to bet, if you measured amps on a meter, in flight, you would see more amps being use on the collective that everything else in the system. What ever way you decide to go, just my advise, stick with a super strong servo, like the ace line by thunder tiger.

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02-10-2006 12:55 PM  12 years agoPost 3
Eury

rrProfessor

Dover NH

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I wouldn't agree with your recommendation on the 9252s on collective. You had bad luck, there was a defect in your servo. Hundreds of people are using those on collective, and have been for years without issues.

Nick Crego

Citizen #0168

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02-10-2006 01:42 PM  12 years agoPost 4
Dr Lodge

rrElite Veteran

Guildford, Surrey - UK

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I'm using 9252 on the collective of a Milli II, no problems.

Vibe 90, Vibe 50, Vigor CS x2,
Dyna-x, Knight 503D, Logo 10,
TRex 500, Furion, Gaui EP200

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02-10-2006 04:51 PM  12 years agoPost 5
jjay

rrNovice

San Diego, CA - USA

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I agree, but I have seen two 9252's fail now in the last five month's, the third, mine bieng bad right out of the box, and doesn't really count. Like I said, just my advise, I am going to feel more confident with a metal gear taking the stress.

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03-13-2006 06:42 AM  12 years agoPost 6
hootowl

rrProfessor

Garnet Valley, Pa.

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I am no expert by any stretch here.

I'm also researching servos and found the S9252, although may be a good servo, it is not specifically recommended for heli's by Futaba. It's rated as an all purpose servo. Other servos are specificfied for heli like the S9255. I have no idea what makes one "heli" and the other not but I can tell you I lost a 9252 in a crash that had zero physical damage. Futaba said the amplifier was intermittant.

Wolves don't lose sleep over the opinions of sheep

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03-13-2006 06:47 AM  12 years agoPost 7
rickc

rrElite Veteran

Creve Coeur IL. (Peoria Area)

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I own both 9252's and 8311's. One Raptor 50 with 9252's and another Raptor 50 with 8311's. I have not had an issue with either brand. Both would be a great choice in my opinion. Out of probably thousands of 9252's being used they have a darn good track record.

Rick

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03-13-2006 03:25 PM  12 years agoPost 8
WreckRman2

rrKey Veteran

Orlando, FL

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I'd go with the 9252's simply because they are faster... the 8311's are nice but somewhat slow. I've used the 9252's on a Raptor 50, Evo 50 and now in a Evo 90 and never had a single issues except a couple of stripped gears from a crash.

________________
David Smith
407.937.9556

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03-13-2006 04:32 PM  12 years agoPost 9
hootowl

rrProfessor

Garnet Valley, Pa.

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Did some research.

Futaba S9252
GEAR: NYLON
TORQUE: 92
SPEED: .14
PRICE: $69.99

JR DS8311
GEAR: NYLON
TORQUE: 125
SPEED: .18
PRICE: $86

HITEC HS6965HB
GEAR: KARBONITE
TORQUE: 92
SPEED: .10
PRICE: $68

HITEC HS6985HB
GEAR: KARBONITE
TORQUE: 144
SPEED: .16
PRICE: $68

I think I'll get the 6985's for my Acrobat

Wolves don't lose sleep over the opinions of sheep

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03-13-2006 09:03 PM  12 years agoPost 10
Tron

rrApprentice

Morgan Hill, CA

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Hoot,

You sure you are not mixing 4.8V and 6.0 volt operating specs for the hitecs? I'm not certain, but I thought the 6965's were not that high unless they were on 6.0 volts.

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03-13-2006 09:23 PM  12 years agoPost 11
WreckRman2

rrKey Veteran

Orlando, FL

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HS6985HB on 4.8v

Operating Speed (4.8V): 0.16sec/60 degrees at no load
Stall Torque (4.8V): 144 oz/in. (10.4kg.cm)

HS6965HB on 4.8v

Operating Speed (4.8V): 0.10sec/60 degrees at no load
Stall Torque (4.8V): 92 oz/in. (6.6kg.cm)

________________
David Smith
407.937.9556

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03-13-2006 11:29 PM  12 years agoPost 12
hootowl

rrProfessor

Garnet Valley, Pa.

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Yes sorry I didn't read the chart correctly.

I edited my data.

Wolves don't lose sleep over the opinions of sheep

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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › S9252 or DS8311 what to do!
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