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HomeAircraftHelicopterThunder TigerOther › Raptor refuses to fly....
02-13-2006 12:37 AM  12 years agoPost 1
KillerKanopies

rrNovice

Bolivar, Mo.

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I've tried numerous times to get my Raptor off of the ground with no success. First problem I encountered was when the jamb nut unscrewed with the fan hub following right behind. That problem is fixed. The next try,as the heli became light on the skids, the blades sounded like they wanted to explode and the tail wanted to whip violently. Absolutely scary. After further investigation I found the tail rotor belt had worked it's way under the red guide wheel. I thought that was what caused the noise and the vibration right under the gyro made it go nuts. That problem fixed by tightening the belt. I thought for sure I had solved all the problems. Well, today I went out in the yard and powered up. The blades came up to speed and the horrible sound began along with the tail whipping.

I'm out of things to find wrong visually. I've checked for loose fitting connection. This is my first new heli. I had an old Shuttle ZX many years ago. I've been flying a Venture CP 30. I'm not totally new to the heli scene, but I still haven't learned all the in's and out's. Any help would be greatly appreciated.

Here's what I know now:
The blades are balanced and tracking good.
The paddles are aligned.
The belt stayed in the guide pulleys this time.
There's not really any out of the ordinary vibration that I can easily see. The exhaust diverter is barely shaking.

Thanks,
Acro

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02-13-2006 12:40 AM  12 years agoPost 2
Giggles

rrNovice

Denver CO

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Describe the "horrible sound". What it metal on metal or a crunching? Tell us a little more please.

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02-13-2006 12:48 AM  12 years agoPost 3
KillerKanopies

rrNovice

Bolivar, Mo.

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Imagine the sound the blades make when you hear when the blades go from one extreme pitch to the other. Most often heard when doing rolls or flips Kind of a loud chopping sound only it's constant.

The blades are Mavrikk G4 Carbon Pro's.

Acro

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02-13-2006 12:52 AM  12 years agoPost 4
JuanRodriguez

rrProfessor

The Villages, Florida

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Acro....
Believe me when I tell you that I am NOT trying to bust your balls.....

You need to get together with someone experienced to give you a hand getting things sorted out for you..... These "toys" are nothing to mess with and can be extremely dangerous..... Do yourself a favor and seek someone out before you seriously hurt yourself.....

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02-13-2006 01:04 AM  12 years agoPost 5
KillerKanopies

rrNovice

Bolivar, Mo.

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Hey Juan,

No offense taken. I appreciate your concern and do plan on contacting some local heli flyers for advice. Only problem is there are not many chopper flyers around here. The ones I do know require an hour drive.

I've been modeling for 20 years now and am fully aware of the risks associated with airplanes and heli's. I was hoping someone would recognize these conditions I descibed and hopefully point me in the right direction.

Regards,
Acro

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02-13-2006 01:07 AM  12 years agoPost 6
Butch

rrVeteran

New York

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Violent swing at liftoff could be the gyro is setup backwards.

Pitch and throttle settings might be off. Sounds like at spool-up, you have too much negative pitch.

I agree with Juan's suggestion!

The Whirlybug Bit Me!

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02-13-2006 01:15 AM  12 years agoPost 7
A. Bundy

rrElite Veteran

Aurora,IL. 30W/SW of Chicago

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1 hour drive is well worth it for good help starting out.

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02-13-2006 01:16 AM  12 years agoPost 8
Raffy

rrElite Veteran

Chicago, Illinois

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Your Main blades and Tail blades are installed backwards!

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02-13-2006 01:18 AM  12 years agoPost 9
JuanRodriguez

rrProfessor

The Villages, Florida

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Acro,
Glad you understand and that you've taken no offense.....

Really, one hour drive is NOTHING compared to the hassle you may encounter trying to do this on your own.... I too started the hobby flying airplanes but please believe me, helicopters are a whole different breed regardless of your RC experiences....

Initially, I drove approximately 45 minutes to a location where other heli pilots flew.... the "short" drive paid off in great dividends.....

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02-13-2006 01:34 AM  12 years agoPost 10
BarracudaHockey

rrMaster

Jacksonville FL

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Have you been to Raptor Technique and read through the build info to verify your setup?

http://www.raptortechnique.com

Andy
AMA 77227
http://www.jaxrc.com

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02-13-2006 01:34 AM  12 years agoPost 11
A. Bundy

rrElite Veteran

Aurora,IL. 30W/SW of Chicago

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Another great idea.

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02-13-2006 02:34 AM  12 years agoPost 12
lineman55

rrApprentice

Connecticut

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Would the belt be twisted incorrectly? causing the tail blades to turn backwards?

It only takes two things to fly -- airspeed and money

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02-13-2006 03:34 AM  12 years agoPost 13
KillerKanopies

rrNovice

Bolivar, Mo.

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This is what I was looking for. Thanks barracudahockey for the link. I found out my tail rotor blade grips were on backwards. That may be the problem. Could the blades have been fluttering causing that chopping noise?

Acro

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