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05-16-2011 02:10 AM  7 years agoPost 1
LETSHUNT

rrNovice

Somewhere,Ca

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Two weeks ago while flying at a local field, the belt on my Furion 6 broke apart in mid flight. Luckily I was able to auto rotate it to a safe landing with no other damage besides the belt and the rear right plate. Before the belt broke, I had no indications of any issues with my belt drive. After talking to a couple of Furion owners, a few had similar experiences with their belt systems. Today, at the field, a fellow Furion owner was flying his Furion 6 and his belt broke in mid flight. In speaking with the owner, he had a similar incident the week before. What I am wondering if any other Furion owners had any similar situations happen to them and if so, what corrective actions were taken? I’m a very meticulous owner, I always pre-flight my heli’s before flying. Today, on one of my pre-flights, I noticed my belt started to fray. After further evaluation, the strand on the belt started to show. What kills me is that this belt is only 2 weeks old with approx. 30 flights. Any ideas or help to resolve this issue would be greatly appreciated.

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05-16-2011 02:44 AM  7 years agoPost 2
RobMcQuillen

rrKey Veteran

Rochester, NY

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Make sure your belt is not to loose, it will cause the belt to fray and eventually brake. I have my pretty tight, and on my original belt from DEC 2010 and it is in great shape. I love the Furion, being a belt driven helicopter, there has been more than one time that I've hit the tail on the ground in low flips or piroflips and didn't hurt a thing Cant beat that now!

These are high quality belts and should not be braking if your belt tension is set correctly....

Rob

Rob McQuillen

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05-16-2011 02:54 AM  7 years agoPost 3
LETSHUNT

rrNovice

Somewhere,Ca

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Thanks for your reply Rob. The first time my belt broke, I figured that the tension was too loose causing it to fray. But since I installed the new belt, I checked the tension and it felt tight. Today, I checked the bearings and everything looked good. I still have yet to find a solid reason why the second belt started to fray. Don't get me wrong, I love my Furion and think it's the best thing since sliced bread. However, issues like this drive me nuts

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05-16-2011 08:43 PM  7 years agoPost 4
JeffM1999

rrApprentice

Erie, CO

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Would it help to lubricate it or would it make the problem worse...

I have been putting some tri-flow on my T-Rex450 belts for awhile and have had pretty good luck, but I just got a Furion and have been noticing a few of these tail belt threads, and I would like to decrease the odds of this happening to me.

LETSHUNT: Do your friends lube their belts, and do you? Wonder if there is a trend regarding that.

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05-16-2011 09:46 PM  7 years agoPost 5
rich m

rrVeteran

Stroudsburg, PA. USA

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I wouldn't recommend lubricating your belt. I think doing so will only increase the chance of the belt slipping in the event that it is not quite tight enough. I have 2 Furion 6's that I have been flying since last August and I have gotten well over a hundred flights on each belt in both machines. I set my belt tension on the tight side and I check it quite often. The belt that you have that is frayed I would just replace. The cost of a belt belt is not worth risking a crash over. I don't mean to insult you but make sure that when you install the belt you don't have an extra twist in it. If you have the belt off I would also take the boom out and make sure it isn't bent a little bit causing it to rub the belt. Post a picture of the front and rear of the belt. Maybe someone will spot something that you have missed.

Team Heli Wholesaler

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05-16-2011 09:54 PM  7 years agoPost 6
rstacy

rrElite Veteran

Rochester, NY

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That belt is practically bullet proof!
The only time we ever had a belt break was when I was running it too loose and it got pinched between the pulley and the frame. That happened early on and since then we have not changed a belt. I have found that they like to run on the tight side.
Check to see where your belt is riding on the pulleys. Make sure that something isn't out of line causing the belt to ride off of the edge.

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05-17-2011 03:12 AM  7 years agoPost 7
Ghostrider

rrElite Veteran

San Diego, CA

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I have to agree with rstacy and rich m. I have hundreds of flights on my 6 with zero issues. I have had to tighten the belt every so often but to me, that is routine maintenance.

I would venture to guess you were running it too loose.

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05-17-2011 10:45 AM  7 years agoPost 8
francis234

rrNovice

malaysia

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a bend tail boom might be the problem. or maybe check the pulley at the tail . make the gear at the pulley is at good sharp

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05-18-2011 09:51 PM  7 years agoPost 9
hyflyr

rrApprentice

Baton Rouge, LA

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Tail Belt
For what its worth I have noticed the belt may have a tendency to walk out of the groove in the rear pulley. The belt will then wedge between the idler pulley and the raised smooth edge part of the main drive pulley. This causes the fraying you are experiencing. Proper alignment of the boom and the belt tension will prevent this from happening. I check the belts tendency both with the belt loose and tight and adjust the boom till the tendency goes away in either case. This way if the belt stretches or for some reason gets a little loose the belt won't get frayed. The idler pulley appears to be a waste because the if belt is ever loose enough to touch it, it causes the belt to wedge and fray. It really needs to be setup to keep the belt aligned properly so the belt will stay in the main groove.

Scott

Scott

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05-19-2011 03:01 AM  7 years agoPost 10
cbaquol

rrVeteran

Phoenix, MD

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Like people above have already stated, the belt is pretty solid. I would say I have a few hundred flights on my original belt. Its been through a collllldd winter, and because it would warm up in flight I had to keep an eye on the tension every now and again, but never has it frayed or broken. Personally, I like to make it almost as tight as I can, if you were to try to pinch the belt at the tail rotor, the insides will bearily touch each other. Some people might think its a little on the tight side, but for me it works great. Keep an eye on the tension and you should have minimal maintenence with it

Baltimore Boyz

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05-19-2011 03:31 AM  7 years agoPost 11
LETSHUNT

rrNovice

Somewhere,Ca

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Thanks, for everyones input. I believe Scott ( hyflyr ) is totally correct. I have spent the last few days checking and re-checking the operation of the tail pulley system. What I have notice that belt tension is key due to the tendency of the belt walking out of the groove in the rear pulley. The only that modification I made was de-burring the sharp edges on the tail idler pulley to prevent fraying. I flew 5 flights this after noon and all is well. I am really enjoying this heli. Once again Thank you all.

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05-31-2011 10:26 PM  7 years agoPost 12
Axeman

rrApprentice

Auckland, New Zealand

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Belt fraying potential causes?
Guys,

Just putting my new Furion6 together and I noticed a couple of things that may cause/contribute to potential belt fraying:

The motor bearing block (part 129-64) is nicely bevelled/rounded on one surface.

I think this rounded side should be facing down towards the bottom of the heli so that if the belt touches it, the belt doesn't rub against a 'sharp' side.

I think the flange of the bearing should be on the top surface of the bearing block, so the belt can't hit it from underneath.

Also, I got a new Scorpion HKIII 4035-560 and the motor shaft was too long and stuck out by 7mm from the bottom of the bearing block 129-64. I think the belt could hit this, so I had to cut the motor shaft down by about 6mm.
The instructions on Page21 also says that the shaft should protrude from the pinion (not bearing block) by only 6mm (not 13mm as in my case with the new HKIII motor).

Anyway, hope this helps.

Cheers from New Zealand!

Steve.

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