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Home✈️Aircraft🚁HelicopterThunder TigerOther › Tail case breaking
09-05-2006 03:55 AM  14 years ago
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Slowpoke

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Dublin, OH

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Tail case breaking

I've got a Raptor 50 that I've broken 3 right side tail cases in the past couple months. No crashes, no hard landings. Any idea what can cause the case to break? Always breaks in the same place. All parts in the tail are stock, except the 92mm plastic Freya blades and the upgraded SUS tail hub. I've got 2 other Raptor 50s that have never had the problem. Strange.
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09-05-2006 04:33 AM  14 years ago
3Dx

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Monterrey NL

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Mmmmmmmmm that is so weird…….
Especially whit no crashes…
Did you buyed NEW?
Team JR/Spektrum, Team Vibe, Team CYE, Team Next D/Rave, Team Outrange Batteries, Team RedFox Fuel
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09-05-2006 04:54 AM  14 years ago
3Dx

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How tight is your belt.
that may be the problem for sure!!
Team JR/Spektrum, Team Vibe, Team CYE, Team Next D/Rave, Team Outrange Batteries, Team RedFox Fuel
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09-05-2006 05:51 AM  14 years ago
HUTCH964

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Taylor,Texas 76574 local airport T74

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Belt too tight or bent tail out put shaft.. I would think it is your tail shaft & check your tail blades make sure their weight are the same..

Also check the bel-crank on the pitch slider and tail control rod for free movement..Food for thought!


*****
Tim
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09-05-2006 06:49 AM  14 years ago
alvinrc

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Mobile, AL, USA

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The bolt that goes through the TR case and the TR belt idle pulley might have been tightened too much in attempt to get the sloppy fit of the pulley as small as possible.
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09-05-2006 10:30 AM  14 years ago
Yug

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UK. Herts

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2 of may cases have broken in exactly the same way. It was all down to tail rotor balance. Not static balance, but aerodynamic balance due to asymmetrical blade tips.Vegetable rights and Peace
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09-05-2006 11:27 AM  14 years ago
colsy

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Cambridge, UK

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I have had one broken the same way, mind you i do bash mine about.

This should cure it.


Colin..
Only Quote From Experience.
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09-05-2006 12:22 PM  14 years ago
Alexander01

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Sweden

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Quick UK's upgrade looks interesting.QuickUK Team Pilot SAB Team Pilot
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09-05-2006 12:29 PM  14 years ago
Yug

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Colsy, is that the production one you just got? Looks like the slot is shorter so a bit stronger.

Was the gear & brace an exact fit or did you have to shim them ?
Vegetable rights and Peace
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09-05-2006 12:35 PM  14 years ago
helifundi

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Lick Run, PA

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Do any heli websites in the US have the Quick UK tailcase in stock?
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09-05-2006 12:46 PM  14 years ago
colsy

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Cambridge, UK

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Damn thing was a PERFECT fit, no shimming required very very impressed, my only moan is the asthetic finish as with all the silver stuff from QUK never seems as nice as the bling colours.

Colin...
Only Quote From Experience.
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09-05-2006 01:00 PM  14 years ago
Yug

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Thats intereseting. Looks like a few small tweeks were made prior to the release part. Without the shims, when the brace was done up it would pull the sides in slightly which means that the bearings wouldn't be dead square on the tail shaft. All that was required was a standard shim washer on the gear and an 0.17mm shim on the brace.Vegetable rights and Peace
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09-05-2006 01:30 PM  14 years ago
Slowpoke

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Dublin, OH

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The tail shaft was new, as well as the cases. I do run the belt on the snug side, I'll loosen it up a bit and see if that helps.
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09-05-2006 01:37 PM  14 years ago
Yug

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UK. Herts

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Slowpoke - what tail blades are you using, & what boom ?
How the the tailbrip bearings feel ?
Vegetable rights and Peace
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09-05-2006 02:00 PM  14 years ago
HUTCH964

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Taylor,Texas 76574 local airport T74

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Believe it or not I have gotten NEW tail shafts from TT bent ever so slightly but bent none the less.. Yes the Quick UK metal tail case will stop the breaking but you still need to look for vibration in the tail.
I had the same thing happen too me 2 times in a row with the same tail shaft I thought was new and straight, when I replaced it I never had a problem again but I didn't wait around for it to either I got a metal tail case and never looked back.

Good Luck Slowpoke!


*****
Tim
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09-05-2006 02:27 PM  14 years ago
Slowpoke

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Dublin, OH

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Yug, I'm using the Mavrikk aluminum boom from Heliproz, and 92mm plastic Freya blades. The bearings in the tailgrip are brand new, the bearings on the tailshaft are less than a year old.

Hutch964, I'll double check the tailshaft for trueness. I'd love to get the new Quick UK case, but want to make sure everything is running properly first.
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09-05-2006 02:34 PM  14 years ago
Yug

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UK. Herts

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when switching to idle up, do you hear any strange tail sounds or does it remain very smooth sounding ?Vegetable rights and Peace
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09-05-2006 03:06 PM  14 years ago
Slowpoke

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Dublin, OH

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Yug,

I'm not using idle up yet, I'm still in the beginning stages, just doing forward flight and circuits. I'm running my headspeed around 1700-1750.

I did notice one thing, my tailblades have grass stains on them, as I fly in medium length grass, could landing in the grass put enough stress on the tail to break the casing??
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09-05-2006 03:12 PM  14 years ago
Yug

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UK. Herts

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very much doubt it. As well as checking the shaft for straightness, have you balanced your tail blades ?Vegetable rights and Peace
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09-05-2006 07:05 PM  14 years ago
Slowpoke

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Dublin, OH

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no, I've never balanced tailblades before. I'm going to pick up a couple extra tailshafts tonight and double check them for trueness.

Thanks everyone
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