RunRyder RC
 6  Topic Subscribe
WATCH
 1 page 721 views POST REPLY
HomeAircraftHelicopterHIROBOOther › belt issues
05-06-2005 07:03 PM  13 years agoPost 1
synodontis

rrKey Veteran

United Kingdom

My Posts: All  Forum  Topic

I rather not post this problem but it wouldn't go away and I need to see what other people's experiences are.

My Sylphide has had a lot of flights and every time I had to change the belt. Why? Simply because it keep on losing teeth! I've posted in the JR section before and they tell me to tighten it - so I did and it still loses teeth.

Now the Sylphide belt is exactly the same as the Freya belt (only difference is that it runs on metal pulleys), so what are you all Freya users experiencing? Do you lose teeth as well and it this just the nature of the beast.

This losing teeth issue is making me want to fly my Freya WC more.

SKS

PM  EMAIL  GALLERY  Attn:RR  Quote
05-06-2005 07:17 PM  13 years agoPost 2
mrNoodles

rrProfessor

Borlänge, Sweden

My Posts: All  Forum  Topic

No problems at all with the belts.
Been flying my Freya for 2½year, mostly all year round.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
05-06-2005 07:21 PM  13 years agoPost 3
synodontis

rrKey Veteran

United Kingdom

My Posts: All  Forum  Topic

my plastic Freya has no belt problems as well, so what is it with the Sylphide? But then again I haven't been flying it much, but I don't beat the life out of my Sylphide either.

Do you keep the belt rather tight?

PM  EMAIL  GALLERY  Attn:RR  Quote
05-06-2005 08:58 PM  13 years agoPost 4
Kinger

rrElite Veteran

Granville, OH

My Posts: All  Forum  Topic

Just curious, when you say the two belts are the same, what are you basing that on? Are you talking about the diameter of the belt, the stretch characteristics, the color, the shape of the teeth?

PM  EMAIL  GALLERY  Attn:RR  Quote
05-06-2005 09:24 PM  13 years agoPost 5
slant911

rrVeteran

Las Vegas, NV. Hirobo, Magnum Fuels, MAH

My Posts: All  Forum  Topic

No problems on any of my freys either going just over 2 years now on the original. I make it tight enough that if you push with "some" pressure that the belt goes about half way when looking at the tail drive counter gear.


John B. McNamara

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
05-06-2005 10:55 PM  13 years agoPost 6
synodontis

rrKey Veteran

United Kingdom

My Posts: All  Forum  Topic

Kinger,

If you look at the belt on the Sylphide and on the plastic Freya then you will see hat they are exactly the same! Same manufacturer and marking. I have both helis. My plasic Freya has a broken one way hub that I need to replace - probably get the K&S one - hence I haven't been flying with it much.

Please help me out. I don't know what it is that I'm doing wrong. I don't even fly the Sylphide aggressively (actually I wouldn't know how !).

Should I change the tail pulley to the plastic one that's used on the Voyager 50, but I can't do anything about the pulley on the main transmission case.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-07-2005 03:15 PM  13 years agoPost 7
4cyclic

rrKey Veteran

Montreal, Can. and northern Vermont

My Posts: All  Forum  Topic

Hirobo belt system = bulletproof .

J.L.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-07-2005 03:30 PM  13 years agoPost 8
Blair

rrKey Veteran

Republic of Canuckistan

My Posts: All  Forum  Topic

I've had a few belt heli's and have never even heard of a belt shaving teeth (Never had a JR heli though )

I suspect something might be up with your pully's. Mis-machined or just plain wrong. How are the teeth coming off? Is the belt left ragged or is it a clean cut?

Blair

PM  EMAIL  GALLERY  Attn:RR  Quote
05-07-2005 04:20 PM  13 years agoPost 9
TMoore

rrMaster

Cookeville, TN

My Posts: All  Forum  Topic

I concur with all my right honourable mates that fly Hirobo re., the belt issue. Damn, I sound just like an MP.

It's been my experience that debris or tooth shape on the pulleys will kill the belts in short order. Go to the manufacturers web page or email them and get the tooth profile or reference someone like Stock Drive Products. Toothed belts have a standard tooth profile that is to be adhered to. If you are using aluminum pulleys I suspect that someone is playing fast and loose with the belt profile specs and incorrectly machining the pulleys. It won't take much. You should see debris coming off of the belt in the form of dust as well.

TM

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
05-07-2005 07:20 PM  13 years agoPost 10
synodontis

rrKey Veteran

United Kingdom

My Posts: All  Forum  Topic

Blair, TMoore,

Now I really am p*ssed. After about 30 flights or so the belt would start losing teeth, this is not good since I was told by someone that this was the norm for what we should expect.

These are stock JR metal belt pulleys, and yes I get the damn fine black dust in the transmission case section where the pulley is. I don't get in it the tail pulley, since, as you can see in my gallery, the tail case is open so any dust would get blow out.

I have a K&S tail pulley so I'll see if that helps, but unfortunately I'll still be using the same pulley in the heli body.

Thanks to all. Any more suggestions? To have this on a high end heli is laughable! Hmmm, maybe I'll turn traitor and commit to the Eagle 3 WC, they looking pretty damn sexy from what I hearing

PM  EMAIL  GALLERY  Attn:RR  Quote
05-07-2005 10:14 PM  13 years agoPost 11
heliandy3

rrNovice

England

My Posts: All  Forum  Topic

had the freya two years .never had a problem .

PM  EMAIL  GALLERY  Attn:RR  Quote
05-07-2005 10:36 PM  13 years agoPost 12
synodontis

rrKey Veteran

United Kingdom

My Posts: All  Forum  Topic

I better eliminate all possibilities before anything else:

1) it can't be my belt since it's the same as you Freya fliers are using. To be doubly sure of this I actually ordered the Hirobo part and used it on the Sylphide - and it still lost teeth!

2) it coud be me having bad pulleys, this machine was one of the first batch in production, I'll try to swap out the pulleys from my third machine to see what happens and inspect the ones that I have taken out

3) it could just be the pulleys, in which case I hope to replace them with K&S or plastic ones

4) it could be other issues that I'm not aware of so I'll still have to ask around. This what I do not like to happen

Urrgh . .

BTW: my pastic Freya never gave me any grief

PM  EMAIL  GALLERY  Attn:RR  Quote
05-08-2005 04:16 AM  13 years agoPost 13
Jason Cummings

rrVeteran

St. Louis

My Posts: All  Forum  Topic

After a little over 2 years of abuse I managed to strip some teeth of a freya belt. 2 years on one belt is acceptable to me. Some thing you may want to look into and I'm not sure what you could do about it. On the original vigor with the belt drive it would strip the belt pretty easily (so I 've been told by a good source, I"ve never actually owned one) the problem was that the pulleys were very small and only a few teeth would bite at a time. So with such a large force on a few teeth and they would strip out in flight. TMoore also has a good point about the machining being a little off.

Synergy Field Rep

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
05-08-2005 04:44 AM  13 years agoPost 14
Freya

rrApprentice

Seattle, Washington

My Posts: All  Forum  Topic

Could it possibly be that you are getting more than a half twist in the belt? If the belt rubs against itself it will take teeth off also.

The only time i had a belt problem or failure on a hirobo was when i sheared the boom off in a real nasty crash

PM  EMAIL  Attn:RR  Quote
05-08-2005 09:23 AM  13 years agoPost 15
synodontis

rrKey Veteran

United Kingdom

My Posts: All  Forum  Topic

Freya,

No chance of that happening! I made damn sure, I suppose that's why I've been told to tighten the belt to prevent that from happening. Also if it did happen, if you think carefully about it, I should be losing teeth at uniform intervals on the belt, I'm not, it's only on a few places.

Hirobo St.Louis,

I think you have a seriously valid point. Looking at the old Eagle belt drive they do seem to have much more teeth.

Alas the Sylphide will never be shaft drive - unless K&S start doing an upgrade.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 721 views POST REPLY
HomeAircraftHelicopterHIROBOOther › belt issues
 Print TOPIC  Make Suggestion 

 6  Topic Subscribe

Thursday, June 21 - 3:33 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online