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HelicopterOff Topics › Heli Explosion
06-02-2004 09:19 AM  13 years agoPost 1
K-Lo

rrApprentice

Monterrey Mexico

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I had a crash this week, this time not involving pilot error (well at least from the flying point of view), i am posting this here to share what happend to me on the field so others could use caution.

I was hovering my heli (raptor 60) at about 3 meters from the ground, when i heard the revs go up, i was planning to land fast after i heard this when suddenly a big bang (gunshot type of noise) was heard. Blades and all flew all over the place. No one was hurt, but it was scary.

A close analisis to what happend is that the blades (wooden blades) give due to over speeding them, i did had them glued well and everything was in flying order, we thought at first that the battery blew but the battery was well and alive. So the conclusion we draw was that the blades give.

The reving up happend when the ball link of the throttle was a bit stuck and suddently it de-stuck and the revs came up abruptly, so the motor gave lots of revs and the blades just broke. The whole heli was saved, except for blades, boom and flybars. Everything else was a miracle.

DO NOT OVER SPEED YOUR WOOD BLADES!

I was using them since i was learning new things and wanted to keep the crash cost down, well they prove to make the crash a bit more expensive

Do what you can with what you have. Often is more than enough.

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06-02-2004 02:01 PM  13 years agoPost 2
Vance

rrVeteran

York ,PA

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Could you please explain how the ball link for the throttle gets "stuck" and "de-stuck". Furthermore, I don't understand how the throttle linkage "de-sticking" can make the headspeed go ballistic. The throttle is coupled to the pitch, so your pitch/throttle curve should take care of that.
The TT wood blades are not known for thier quality so one could theorize that your headspeed didn't really shoot up "too" high, but rather the blades themselves just plain suck and broke. There are quite a few people flying wood blades up around 2000 RPM.
One thing to consider is getting some fiberglass blades. I seem to recall being able to buy some 680's for about $35.00. No glue or shrink wrap to worry about. Double check the balance though. I am at work and don't have the website for the blades right now.
Vince D

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06-02-2004 02:08 PM  13 years agoPost 3
Raffy

rrElite Veteran

Chicago, Illinois

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fiberglass blades. I seem to recall being able to buy some 680's for about $35.00.
Hmmm, where?
If that were true, I woould stock 4 of them for the price I paid for each.

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06-02-2004 03:26 PM  13 years agoPost 4
Tripen2

rrApprentice

Back in Tucson, AZ

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well they are $38.00 with shipping for 600mm, it might take a little time to get them, i ordered some on may 12 and they just shipped yesterday. So they might be on backorder again. click on the link below, do a search in assc. for fiberglass.

http://www.airborne-models.com/

Mike

16hrs to build 30secs to crash
Raptor 90
Raptor 50V2
Trex, HB CP

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06-02-2004 06:16 PM  13 years agoPost 5
Waldo

rrVeteran

Middle of the corn patch (Iowa)

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I wouldn't buy airborne models blades, the last 3 sets of 550's I got from them were warped beyond use 0 degrees pitch at the root of the blade and + 5 degrees at the tip. Use to swear by the 550's the 600's and 680's have way to much flex to be any good IMO. I no longer buy from them, spend a little more and get some good blades.

P.S. I get flamed every time I say this but I'll say it again, if you can afford a 60 sized helicopter you can afford good carbon blades, and I would never use wood blades on a 60 helicopter.

[b]Bill[/b]

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06-02-2004 06:17 PM  13 years agoPost 6
blakka_1

rrElite Veteran

London/Enfield

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A CRAPtor blew up?
like you once said to me seneca!!!

"any heli will blow up if not setup correctly"

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06-02-2004 06:20 PM  13 years agoPost 7
blakka_1

rrElite Veteran

London/Enfield

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so what exactly makes the raptor crap?

what do other helis have that the raptor doesnt?

what can other helis do that a raptor cant?

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06-02-2004 06:23 PM  13 years agoPost 8
blakka_1

rrElite Veteran

London/Enfield

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and I was here first
cheater

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06-02-2004 06:30 PM  13 years agoPost 9
the collective

rrKey Veteran

Bayside, NY, U.S.A

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so what exactly makes the raptor crap?
The company making them, as far as I'm concerned. I'll never buy anything from Thunder Tiger.

I made the mistake of buying an Ace DDVC charger from them two years ago. Ace used to be a decent company before TT took them over.

The charge came with no leads. I ordered a set of leads for Airtronics, and was told they were on back order. I waited patiently for an entire summer, finally I told them I wanted to send the charger back if they couldn't furnish leads for it. They asked me to wait, it wouldn't be much longer.

Finally, when the next summer began and I still didn't have my leads I called and told them I was through waiting and wanted to return the charger... At that point they informed me that I was crazy if I thought they'd take back a charger that was over a year old.

That DDVC represented the last time I buy anything from Thunder Tiger.

The Raptors might be good, might be crap, I really don't know and don't care. I'll never find out because I'll never buy a TT product again.

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06-02-2004 06:33 PM  13 years agoPost 10
Ted Toth

rrElite Veteran

Myrtle Beach S.C.

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At that point they informed me that I was crazy if I thought they'd take back a charger
did they use "crazy " or refer to


.

You don't stop laughing because you grow old, you grow old because you stopped laughing.

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06-02-2004 07:01 PM  13 years agoPost 11
A. Bundy

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Aurora,IL. 30W/SW of Chicago

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Grind that axe.

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06-02-2004 07:04 PM  13 years agoPost 12
blakka_1

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London/Enfield

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ive never had a problem dealing with TT

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06-02-2004 07:14 PM  13 years agoPost 13
heli1man

rrApprentice

Chautauqua Lake, NY

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question with a question

Seneca,
You did'nt answer blakka's question. You sound like a politician throwing it back like that. JUST ANSWER THE QUESTION!!............YOU CAN'T HANDLE THE TRUTH........oops sorry time for my medication and nap now.

Bill

Eco 8 Brushless, MS composits Raptor30v2 39TT 550TT carbons Shogun 400 Brushless 3 cell lipo.

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06-02-2004 07:16 PM  13 years agoPost 14
blakka_1

rrElite Veteran

London/Enfield

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You did'nt answer blakka's question. You sound like a politician throwing it back like that. JUST ANSWER THE QUESTION!!............YOU CAN'T HANDLE THE TRUTH........oops sorry time for my medication and nap now
lol. dude, just let it go, i cant be assed to argue anymore, im gona go rip up da skies wid my rappy now, see you guys later

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06-02-2004 07:30 PM  13 years agoPost 15
Temjin

rrApprentice

Walnut CA, HsinChu Taiwan

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A CRAPtor blew up?
Obviously you can't comprehend, it's the blade not the Heli.



Life is short. Offend as many people as you can. - Tom Leykis

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06-02-2004 07:42 PM  13 years agoPost 16
blakka_1

rrElite Veteran

London/Enfield

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blah blah blah

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06-02-2004 07:47 PM  13 years agoPost 17
Temjin

rrApprentice

Walnut CA, HsinChu Taiwan

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I am just saying why is it mechanical when its another brand and blades all the time when its a CRAPtor?
You are just saying it, do you have any proof? If not, just stop pulling crap from your behind.



Life is short. Offend as many people as you can. - Tom Leykis

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06-02-2004 07:47 PM  13 years agoPost 18
blakka_1

rrElite Veteran

London/Enfield

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Typical newbies I guess,you kids will learn
lol. "danny szabo" & "alan szabo" = raptor flyers

yeah us young kids learn pretty fast dude, we just too much for you old foe'gies

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06-02-2004 07:52 PM  13 years agoPost 19
blakka_1

rrElite Veteran

London/Enfield

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nowadays it is real easy to learn to fly these toys.
your right it easy to fly these things now days, any1 can fly them, but not many can fly them like a professional - that takes time

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06-02-2004 07:54 PM  13 years agoPost 20
Temjin

rrApprentice

Walnut CA, HsinChu Taiwan

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YOur right is no proof either way this guy "claims" it was the blades but how do we know for sure.
You can tell from below
The reving up happend when the ball link of the throttle was a bit stuck and suddently it de-stuck and the revs came up abruptly, so the motor gave lots of revs and the blades just broke. The whole heli was saved, except for blades, boom and flybars. Everything else was a miracle.
That's what he observed and experienced, the chance is the greatest.



Life is short. Offend as many people as you can. - Tom Leykis

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