Just thanking my luck.... - RCCanada - Canada Radio Controlled Hobby Forum
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Old 08-21-2004, 08:47 PM   #1
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Just thanking my luck....

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... Flew my 1.20 size sukhoi today. was windy. Half way around first circuit, I noticed a wheel pant was twisted so that the back end was pointing down!

Immediately came in to land... hoping the landing would push back the pant so that the wheel was again on the ground. It was a good gentle landing, and I was lucky, the pant rotated back to where it belonged. When the plane lost most of it's speed, I turned it to taxi back to the pits area.... and the complete wheel, pants, axle, and everything just fell off the main gear support..... The nut on the inside had come off. I killed the engine, went up to the plane and found everything except the nut right there, including a washer that sits between the nut and the main gear.

How's thast for lucky. I guess if I had rolled or banked in the direction other than the circuit I had already done, I would have lost the wheel in the air. Would have made for a very messy landing.

Anyways, I guess I have just discovered one more thing to pre-flight.

"wheels attached to plane - check!"

if only...
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Old 08-21-2004, 10:08 PM   #2
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Lock-tite Gus, Lock-tite!!!!
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Old 08-21-2004, 11:33 PM   #3
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I lost a wheel in my Cub last Friday...one of those expensive Dubro 1/4 wheels too! My Dad saw it fall off, but could not pinpoint a location. The one wheel landing took a bit of concentration, and as soon as it was down and rolling, I killed the engine. When the axle stub hit, it nosed up ever so gently, then back down on all two wheels. No damage except the lost wheel.

The wheel collar was cinched down and lock-tited. I wish someone would invent something that is a massive improvement over existing wheel collar technology.

The sooner you fall behind, the more time you will have to catch up.
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Old 08-22-2004, 12:55 AM   #4
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I had the same thing happen about 10 years ago on a little Q40 racing plane. One wheel came off in flight and ripped the fuse up on landing pretty good. After that I made it into a hand launch plane and it worked out really well!

One common misconception about Loctite is that it'll just work if you put it on the fastener. In reality, both the fastener and the threaded hole/nut must be clean of any lubricants... Use rubbing alcohol to clean them. Otherwise the loctite can become virtually useless as is will not cure up properly.

That and people often assume a one size fits all approach with the stuff. as a rule of thumb, 242 is a decent removable strength compound, and its commonly available. I think there is a better one that's more aimed at smaller fasteners, but 242 will do for the collar set screw. I know of a permanent compound that will work well for the collar on the shaft fit, but I forget the number now. That would be then next best thing to welding them together...

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Old 08-22-2004, 07:20 AM   #5
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Dont use wheel collars! They are an item invented by the devil and promoted by the wheel manufacturers.
Use a self locking nut if yours is a threaded axle,or the applicable brass tube soldered to the wire axle with the wheel drilled to fit and secured with a washer and cotter pin...........a little work but paid for by the first wheel you dont lose.
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Old 08-22-2004, 07:36 AM   #6
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great idea Kevin, i hadn't thought of that, usually i grind a flat spot on the axle and then cinch the wheel collar down.
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Old 08-22-2004, 07:51 AM   #7
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Sometimes the simplest things escape me

Hey Kevin,

Could you give me alittle more detail about how you do the brass tube/sleeve? If you sloder it on, with the wheel in place, will the heat from the soldering iron not travel through the wire and melt the wheel hub?
Ted LeBlanc
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Old 08-22-2004, 08:30 AM   #8
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Re: Sometimes the simplest things escape me

Originally Posted by Noin
Hey Kevin,

Could you give me alittle more detail about how you do the brass tube/sleeve? If you sloder it on, with the wheel in place, will the heat from the soldering iron not travel through the wire and melt the wheel hub?
No that's why Kevin said to resize the wheel hole to allow for the extra dia of the brass tube.

Kevin I assume that you cut down the axle so it is just a litle longer then the thickness of the wheel and the brass tube extends say a 1/8" to 1/4" beyond this and that is where you drill the whole for the cotter pin? Otherwise why not just drill through the axle directly and use washers and a cotter pin? Other then the axle being to hard to drill through.

Kevin feel free to correct as you see fit!
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Old 08-22-2004, 09:46 AM   #9
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I usually smear bit of silicone (caulking) on the end of the wheel collar/axle when I install them. Havent had one like that come off, but its still easy to get them off when you need to.

On a larger model, I like Kevin's idea.
Andrew Coholic -MAAC #26287L

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if its got a wing or two and an engine - I like it!
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Old 08-22-2004, 10:35 AM   #10
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Even a piece of fuel tubing on the end; Many trust that for their clevises too.
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