2 Tail belts in one week.

[Tim Procter]

Is that unlucky or have I a problem with my 450SE v2.

Flew it Sunday morning when the tail belt broke and managed to get it down without any damage, But when it happened again tonight I feel there there must be a problem somewhere, Hence I got it down for a second time again with no damage luckily hitting the hold switch promptly.

Now the belt tension is not too tight (when you nip the belt together it touches no problem) but I fail to see why a second belt has broken after only around 15 packs through it.

Flying idle up every flight with all standard parts as it came new before Christmas. Checked the pulley's/bearings/tail boom is straight/fitted a new tail rotor shaft/Everything is in-line.

The heli fly's absolutely fine with no problems at all but I feel my luck can't last if these keep snapping.

Any thoughts guy's.

[nookybear]

i have also had the same problem on my v2 so am taking a look on here to see if its a commo problem

[moonmanflyer]

Had my first one go on me last week, no warning just snapped, have noticed my lads one starting to fray on the edges so to be safe will change that one also.
Think it is a case of keeping a close on on them, i know someone who flys very hard 3D and he has never had one go.

[nookybear]

look in the 450 specific section on page 4 there is a bit about removing idler pulley on tail gear box.
i will try that as i have lost a few belts now only on my v2 version v1 seems to be better. also heard about silicon spray on the belts but cant find ant more info on that

[LipolyGone]

Belt tension is a real killer on the 450 se v2.
You should be able to put your small finger in the cutout & push the tail belt across so it just touches the other side under moderate tension any tighter than this & you will fray & snap belts.
You also need to spray the belt with silicon polish to help keep it supple I think this is mainly down to the tight radius of the pinions on the heli causing premature belt wear when it's over tight.
Martin

[heliward0]

yea i heard some thing about removing the belt tentioner on the tail-box? a few say this cured the problem,,

[Tim Procter]

Had my first one go on me last week, no warning just snapped, have noticed my lads one starting to fray on the edges so to be safe will change that one also.

Jeebus James the belt that has snapped tonight is all frayed down one side and thought it could be rubbing somewhere but I have looked at every angle and there is nothing rubbing or catching anywhere..

Not happy its happening but glad I arnt the only one..

[Tim Procter]

look in the 450 specific section on page 4 there is a bit about removing idler pulley on tail gear box.
i will try that as i have lost a few belts now only on my v2 version v1 seems to be better. also heard about silicon spray on the belts but cant find ant more info on that

Also just had a PM from someone (thanks timmy) who mentioned removing the said pulley from the tail and run it without..

Is this possible.??

Thanks for the tip BTW.

[Buccaneer]

Good evening Tim

[robgt]

Yes, it's the idler pulley on top of the tail gearbox and can be removed - shouldn't be any problem as lots of people have done it.

Cheers,
Rob

[Tim Procter]

Good evening Tim

Hello Ian, You having fun..

[timmmy]

you 100% have the belt twist as manual,then spin the blades by hand to see if its trying to ride over to one side on the pully at the back if the belts are shredding on the side id look at removing the pully the silver idle pully on the top 100% people are removing it mate

my first one shredded i put a new one o nand checked the twist etc again and now its been fine for as long as you have seen it flying with the pully on

[Tim Procter]

Yes, it's the idler pulley on top of the tail gearbox and can be removed - shouldn't be any problem as lots of people have done it.

Cheers,
Rob

I take it you have removed yours Rob, Did you have problems with belts snapping too..

[Sieze2]

I used to go through lots of belts on my 450 SE v2. I removed the idler pully, stopped setting the belt so tight , and used WD40 on the belt to keep it lubed up. That totally fixed my problems, now the belts last 150 flights or so.

[Mikee]

After two belts in one week and heli was 2 weeks old then .. I saw this on Ebay and bought it.. never had a problen since.. Removing the idler wheel is also a good option and the guys on Helifreak have all done it
my Ebay special idler pulley for 450