RunRyder - Important Joker part failure.

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e-Minicopter Joker > Important Joker part failure.

clay454
Senior Heliman
Location: Ohio

[img] /helicopter/gallery/33800/fault.jpg [desc]

This issue happened to my Maxi Joker 2 cameraship. Might be old news to some. The tail drive pinion top had fallen off out of nowhere. Luckily I was just hovering low to the ground. The belt fell off and the tail stopped!!!!!!! I saw the pmetal piece hit the ground a minute before it happened. I got it on the ground with minimal damage. If this would have happened up high you would be reading about me in the paper. I know it was installed right because I checked it religiously. Plus the pinion and roller were still in place. I made sure the roller had no part in this. It was still in place perfectly lined up with the pinion not interfering. If this cap comes off. You will crash. Its that simple. Might want to check those pinion caps. (gallery picture)

Since this happened out of nowhere when it appeared fine. Im scared it will happen again. Its easy to see how it happens if you look at the piece. It might be a good safety measure to extend a small piece of aluminum over the top of the gear. It very well would save you if the top pops off like mine. Theres a pic of the problem in my gallery.

clay

01-25-2006 Over year old.

HOMEPAGE

bell-230
Key Veteran
Location: sonoma, ca (currently milano italy)

maybe try some green loctite in there, i use it for all bearings or any situation a shaft is holding something.

ian brooke
k2shots.com

01-25-2006 Over year old.

HOMEPAGE

z11355
rrMaster
Location: 10000 is enough time wasted.

no, you're not understanding.

The upper 'flange' on the pulley came off the pulley.

That allowed the belt to move up (and off the pulley).

Part failures do happen but how sure are you that the
belt was running in the pulley the way it should and not
applying a force to the edge of the flange? Or belt tension
was too loose?

Especially in the cold Ohio winter? Perhaps the belt loosened
and slapped the flange enough?

01-25-2006 Over year old.

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clay454
Senior Heliman
Location: Ohio

I know the obvious thing would be to look at human error. The belt was riding nice and taught. I had several flights on it. Plus I check it before every flight. My roller was in the pinion groove but not contacting anything. Even if the belt was to tight or loose(wich it wasnt) it shouldnt have happened. I believe a part that critical should be able to withstand that. The only thing I can think of that I would have done is the installation. Maybe I loosened or banged the top when trying to install it?

clay

01-25-2006 Over year old.

HOMEPAGE

z11355
rrMaster
Location: 10000 is enough time wasted.

I'm not attacking.

Just going through the different fault scenarios.

01-25-2006 Over year old.

HOMEPAGE

clay454
Senior Heliman
Location: Ohio

javascript: view('/helicopter/gallery/33800/fault.jpg'

sorry,,,I didnt think you were. Didnt meen to sound defensive. I just wanted to explain why I thought the setup wasnt an issue.

clay

01-25-2006 Over year old.

HOMEPAGE

z11355
rrMaster
Location: 10000 is enough time wasted.

no problem.

I know here in the Northeast, almost no matter how tight I make
the belt, when I fly in the cold, it loosens up.

I *reallly* wish the d@mn boom & attach block had a groove/pin
to keep the tailshaft horizontal.

01-25-2006 Over year old.

HOMEPAGE

Squirrlybird
Veteran
Location: Suffolk, Va US

Have you spoken with Joe yet? Part #357 is a preassembled part. How is this part held together?

Sorry to hear about your bird. Congrats on the minimal damage though. Good luck in getting it back up quickly.

01-26-2006 Over year old.

clay454
Senior Heliman
Location: Ohio

Who is Joe? I usually get my parts from fx aeromodels. They dont seem to know the first thing about helicopters. But they have been tremendous as far as customer service.

clay

01-26-2006 Over year old.

HOMEPAGE

tabbytabb
Elite Veteran
Location: seattle

I had a similar failure but mine did not shear completely off, the flange seperated and was spinning freely only held on by the center portion.

Something to keep an eye on!

Tabb

01-26-2006 Over year old.

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Squirrlybird
Veteran
Location: Suffolk, Va US

Joe is the US distributor for the joker. jokerusa.com. I wasn't aware that this heli could be bought anywhere else in the US. He is a pleasure to do business with.

01-26-2006 Over year old.

z11355
rrMaster
Location: 10000 is enough time wasted.

I know on my machine, the belt rides near the bottom of the
pulley and I can see 1-2mm of aluminum pulley between the
top of the belt and the flange in question.

01-26-2006 Over year old.

HOMEPAGE

the19hole
Heliman
Location: Lexington, KY

I check both of my Maxi's tonight. When the pulley turns the belts drive down on the pulleys. Makes sense with the twist direction of the belt. The flange at the top of my new Maxi (never in the air yet) has a small warp in the flange though.

01-27-2006 Over year old.

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RoadkillBC
Senior Heliman
Location: SE Wisconsin

For what it's worth, mine rides against the bottom of the pulley also (Joker 2).

01-27-2006 Over year old.

HOMEPAGE

clay454
Senior Heliman
Location: Ohio

Oddly my new gear runs at the bottom also. I probably had a defective part and overlooked it. Does anyone run a 14t front and 14t rear pinion for the tail? I believe they should both be 16t but I cant find any in stock.

clay

01-27-2006 Over year old.

HOMEPAGE

z11355
rrMaster
Location: 10000 is enough time wasted.

it's part 358.

If you're desperate and Joe can't get you one, I have
a NIP one I can send you.

01-27-2006 Over year old.

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electro212
Veteran
Location: Lancaster Pa

where is the pic of the bad part??

01-27-2006 Over year old.

HOMEPAGE

z11355
rrMaster
Location: 10000 is enough time wasted.

check Clay's gallery

01-27-2006 Over year old.

HOMEPAGE

electro212
Veteran
Location: Lancaster Pa

ok i see it

01-27-2006 Over year old.

HOMEPAGE

flyboy
Elite Veteran
Location: California

Here is an assist with the part in question.

I have not had any problems with the four or five that we are flying.

I order from both Fx & Joker-USA (Joe Howard) Both are great to deal with. Joe is by far and above one of the best sources of info concerning the Minicopter helicopters and Jokers in general. (Now if we could just get him to update his website, with better pricing and parts avail.) he would rule the world!

www.joker-usa.com
www.fxaeromodels.com

Flyboy

01-30-2006 Over year old.

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e-Minicopter Joker > Important Joker part failure.

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