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HomeAircraftHelicopterHelicopter Main Discussion › Shaft driven as opposed to belt
01-16-2010 04:20 AM  8 years agoPost 1
bensidus197217

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Richmond B.C. Canada

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Don't laugh! I have a Kyosho Nexus that I'm going to fly ASAP and I noticed when I was spooling up the engine that the gear noise at lower speeds is very loud it did settle as head speed picked up. Now am I hearing gear lash noise or is there some other part of the head etc that rattles or is loud at lower RPM? The blades were not mounted at this time due it being initial startup and systems check. Is there a belt drive system I can adapt to this heli or would that be a waste of time changing over to get rid of the gear noise. I have a Raptor60 as well and is there a belt drive system for those? The Raptor I will do the bling and upgrade thing but the Nexus is my disposable heli once my skill level takes me to the Raptor stage. Any imput will be welcome. Thanks

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01-16-2010 05:01 AM  8 years agoPost 2
philip 01

rrElite Veteran

ft worth

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my first heli was a nexus in the summer of 1998. it quickly became a shuttle z-ts. as i recall the nexus had a wire drive for the tail.

i wouldn't sink any money into a nexus. just keep flying it til it explodes and scrap it.

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01-16-2010 06:13 AM  8 years agoPost 3
bensidus197217

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Richmond B.C. Canada

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Yes I think so. As far as the Raptor60 goes is there a belt system to replace the wire drive or is that not a good idea? The Kyosho I will likely keep flying till there are no parts to be had or I grow out of it whichever comes first

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01-16-2010 02:18 PM  8 years agoPost 4
hanzuki

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London, Ontario-canada

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The heli is designed to be spun up with the load from the main blades present. I'll bet if you have the main blades the lash noise is lessened or gone. Its generally not a good idea to spool a heli up with out the main rotor anyway.

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01-16-2010 02:39 PM  8 years agoPost 5
Don

rrApprentice

WI

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I agree with having the blades on it when you spool it up. I recall hearing a noise similar to what you describe when I spooled up without blades on.

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01-16-2010 04:35 PM  8 years agoPost 6
gftazz

rrVeteran

upstate N.Y. in the Adirondacks

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R60 is torque tube drive.
The Raptors in the larger sizes 60 and up are all torquetube drive. It's a shaft drive. The Ghobee has a belt drive for theirs but i think they are out of business now. Most of the 50 and smaller sizes were belt drive but there are quite a few now that are shaft drive also.

Oh No Someone Please Stop Me Before I Go Broke With This Heli Thing!!

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01-16-2010 10:41 PM  8 years agoPost 7
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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it is possible the guides for the wire drive are worn out....it wasnt designed well.

i had converted my nexus to torque tube a number of years ago. i cant recall where i got it though, it had been so long.

Shawn
Team Leisure-Tech
Team HelixRC

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01-17-2010 12:58 AM  8 years agoPost 8
bensidus197217

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Richmond B.C. Canada

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I tried to fly the Nexus today it spun up full blast on throttle and full pitch got light on the skids thats all. I noticed that on fast idle the blades were barely moving I think maybe the clutch is gone. When I had it apart the steel clutch surfaces had some deep scoring don't remember what the clutch bell looked like. Anyone have a good clutch for one of these?

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01-18-2010 01:36 AM  8 years agoPost 9
Copter Doctor

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Enterprise/ft.rucker ,al- home of army aviation

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its funny to hear about a nexus, i flew a couple for years back then. that design is what i like to call "pre 3d out of the box" design. the wire driven tail will whip and thats what yuo are hearing, thye discs the wire runs thru may be worn but other than that, no big deal. like mentioned, it isnt worth the time or money cobverting it to a tube drive and i dont believe theres a belt drive conversion available.
if it is only getting light on the skids like you described, the you dont have enough pitch or if the clutch is gone, then a new one is in order. the nexus was agreat machine butlike all the kyoshos, theres no point in getting even a current model because they are always replaced by a newer design that wont share parts with the one you got that is now discontinued
i think you are on the right track however,learn as far as it will take you then may it rest in peace

drive a rotary, fly a rotorcraft

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01-18-2010 01:56 AM  8 years agoPost 10
bensidus197217

rrNovice

Richmond B.C. Canada

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I understand you can reline the clutch bell. I can build up and machine the other part if it won't screw with the temper.It looks to be hardened or spring steel either one cannot be welded without damage so my only option is maybe a thick enough lining in the bell. As far as conversions go I can pull the parts out of it and put them into one of the cheap chinese ones fly that with the respect due to it

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