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Real Raptors . Mikado Modellhubschrauber . GrandRC

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Crashed? Discussion and Photos > R50 LongRanger - Just about crapped my shorts
 
 
fritzthecat
Key Veteran
Location: New Orleans

I did a little review on the Throttle Jockey in the Electronics forum so read about it there.
I installed the TJ in my scale raptor because the fuse makes the heli sound different and I can't tell rpms anymore. So I set it up for 1450 and 1520 main rpm and went flying.
First tank was nice, the TJ worked as advertised and passerbys were suitably awed by my flying skill and the scale body.
Midway on the second tank I landed to change #s in my radio and got ready to take back off. I throttled up and the engine whined, tailblades reved and nothing on the mains. I figured the engine kicked over and ran backwards. Reved up and down, pinched fuel line but no go. So I shut the engine off and picked the heli up by the rotorhead. Lifting up the whole rotorhead and mainshaft slid up about 3 inches. I just went H..S.. and clenched my cheeks. On the bench I looked in and found the lower Jesus bolt was gone. I have a Heliproz purple slipper on it and the long bold holding the slipper, one way sleeve and mainshaft together disappeared.
I went home and had a beer, or two, or three to calm my nerves. I was going to paly the Lottery but that would make no sense now since I've used up all my luck for this year.
My lucky Rapster:


If you read my TJ review I noted that during rpm changes the engine yelped and kicked. I guess one of those kicks was too much for the bolt and sheared it. Pressure kept most of it in until I landed.

Fritz


'Send Money, Women and Guns!'
04-20-2003 Over year old.
 
 
Jagboy69
Key Veteran
Location: Lake Mary, Florida (20 mins East of Orlando)

WE really need a fix for this jesus bolt thing.. In the Real aircraft world. we use good hardned safety pins for high stress areas.. like landing gear downlocks and such... but good hardened excessively shanked bolts would work better... glad you caught it before flying.. could have sucked really bad..

Jason /// Sceadu50/9chp WWW.Jagboy69.com
04-20-2003 Over year old.
HOMEPAGE  
 
 
Copter Doctor
Elite Veteran
Location: daleville/ft.rucker, al

same thing happened to me

the bolt in the main gear on my huey with hawk mechs sheared. i realized it when i shut down and picked up the heli. scary. it has a longer shanked bolt in it now.

drive a rotary, fly a rotorcraft
04-22-2003 Over year old.
HOMEPAGE  
 
 
Vitya
Veteran
Location: North York, Ontario

You lucky guy, im glad nothing happned to your heli, same as im glad my pitch servo decided to go to -2 degress when i had training gear on
04-22-2003 Over year old.
HOMEPAGE  
 
 
Bignose
Senior Heliman
Location: England

Jesus bolt shear

You lucky b*******d!!! On my V1 50 the Jesus bolt sheared at about 40ft, and just about totalled the heli. It is a known problem with TT - the bolts they supplied for the V1 were totally unsuitable, not being shanked at all. V2 are better, but still not fully shanked, as the bolthole in the mainshaft is slightly longer due to the driven tail.
05-01-2003 Over year old.
 
 
Isaac F
Key Veteran
Location: Panama Republic of Panama

I use Long Shank Stainles Steel Screws. You can get it in www.microfasteners.com

Good luck,

Isaac
05-01-2003 Over year old.
 
 
Isaac F
Key Veteran
Location: Panama Republic of Panama

I use Long Shank Stainles Steel Screws. You can get it in www.microfasteners.com
05-01-2003 Over year old.
 
 
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Crashed? Discussion and Photos > R50 LongRanger - Just about crapped my shorts
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