JR 821 servo ?
05-23-2007, 06:02 PM
#2
RE: JR 821 servo ?
G'day Mate,
Yes they do have Karbonite gears. http://modelflight.com.au/digital_servos.htm
Yes they do have Karbonite gears. http://modelflight.com.au/digital_servos.htm
05-23-2007, 07:58 PM
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RE: JR 821 servo ?
Hi,
Thanks for the info. I wish they were made of nylon. They can take more of a shock. Took out the output gear for no reason at all.
RD
Thanks for the info. I wish they were made of nylon. They can take more of a shock. Took out the output gear for no reason at all.
RD
05-24-2007, 02:21 PM
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RE: JR 821 servo ?
And that was proven to be operator error due to using Loctite on the horn screw. I have been using the 821's in 4 different 1.20 size planes up to 13 pounds that see extreme 3D flying, and have not had a single problem. They're a great servo. I also use them in my Falcon heli.
ORIGINAL: BarracudaHockey
They have been shearing output shafts they circulated some warnings about appropriate use.
They have been shearing output shafts they circulated some warnings about appropriate use.
05-25-2007, 08:20 AM
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RE: JR 821 servo ?
I did not use any Locktite. The plane is a Giant Spotster with a Fuji 32. It has only a barndoor aileron
and small throws. The engine vibration did it. It took a tooth out of the main gear.
RD
and small throws. The engine vibration did it. It took a tooth out of the main gear.
RD
05-25-2007, 09:56 AM
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RE: JR 821 servo ?
Well, now you know the major reason why we never use nylon geared servos in a gasser. You failed to mention that in your first post. Especially a Fuji.
ORIGINAL: rhd-RCU
I did not use any Locktite. The plane is a Giant Spotster with a Fuji 32. It has only a barndoor aileron
and small throws. The engine vibration did it. It took a tooth out of the main gear.
RD
I did not use any Locktite. The plane is a Giant Spotster with a Fuji 32. It has only a barndoor aileron
and small throws. The engine vibration did it. It took a tooth out of the main gear.
RD
05-25-2007, 08:49 PM
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RE: JR 821 servo ?
These gears are not nylon. They are karbonite which is very brittle and will shatter. I have four gasers with nylon geared servos and never a problem. A G62, G38, G23, and an SPE 26. I have a Saito 100 that vibrates much more than my Fugi.
RD
RD
05-26-2007, 10:05 AM
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RE: JR 821 servo ?
True, they are not nylon, but you must treat them as though they are. JR does not condone the use of those servo's in a plane bigger than a 12 pound craft, nor gassers. If you're running a gasser with nylon servo's, then I hope you're caught up on your prayers, especially running a Fuji, lol.....
ORIGINAL: rhd-RCU
These gears are not nylon. They are karbonite which is very brittle and will shatter. I have four gasers with nylon geared servos and never a problem. A G62, G38, G23, and an SPE 26. I have a Saito 100 that vibrates much more than my Fugi.
RD
These gears are not nylon. They are karbonite which is very brittle and will shatter. I have four gasers with nylon geared servos and never a problem. A G62, G38, G23, and an SPE 26. I have a Saito 100 that vibrates much more than my Fugi.
RD
