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06-04-2004 01:42 AM  13 years agoPost 1
helicopter34

rrVeteran

New Jersey, exit 82

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What is everyone using for their tail drive pinion. Are you guys using the conical plastic one. I got tired of stripping the conical little things so I put a 9T steel pinion on it. Now I strip the main gear because the pinion sometimes jumps the gears, even with a really tight mesh. I just put a 11 T steel pinion on because it had more defined teeth and I thought it would sit better on (even though I am decreasing my tail rpm). Just wondering if anyone else is doing this.

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06-04-2004 04:00 AM  13 years agoPost 2
parrott

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Morehead City NC

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The plastic conical ones work fine. The biggest thing is you need the oneway clutch installed. This will help alot. I have probably 30 flights on my plastic one.

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06-04-2004 04:44 AM  13 years agoPost 3
hornet dave

rrKey Veteran

Cedar Rapids, IA USA

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no no no no no. get that metal pinion out of there, unless it's conical like the stock plastic tail drive pinion. A straight cut pinion will not mesh with the conical crown gear on the main gear properly. The original Hornet FP from two years ago used a different main gear, and a standard pinion was used for the tail driveshaft. However, that design would strip if you even thought about touching the tail rotor onto grass, hence the current design using the conical pinion.

To get the plastic conical pinion to stop stripping, you just need to swipe the top of the main gear (the part that touches the lower main shaft bearing) with a file or sandpaper a few times in order to raise the main gear just a fraction of a millimeter. This will result in a tighter gear mesh between the conical pinion and the crown gear, and you probably wont strip one out for the rest of the year. Be careful when you trim the top of the maingear, you dont want to take too much off, so just remove a tiny bit of material, check the fit, and remove a little more if necessary.

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06-04-2004 12:15 PM  13 years agoPost 4
Gary Jenkins

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Nowhere, US

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What is the oneway clutch going to solve?

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06-04-2004 10:51 PM  13 years agoPost 5
parrott

rrNovice

Morehead City NC

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It lets the tail rotor stop when you cut the throttle while the main rotor keeps turning. If the tail rotor gets caught in the grass it will keep the pinion from stripping.

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06-04-2004 11:14 PM  13 years agoPost 6
helicopter34

rrVeteran

New Jersey, exit 82

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Ninguna mas pinions

I just ordered new conical pinions.

I have been struggling with this damn tail drive shaft all night. All my setups using aluminum tubing and carbon rod scraps broke or vibrate too much

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06-05-2004 01:46 AM  13 years agoPost 7
Gary Jenkins

rrElite Veteran

Nowhere, US

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If for land under power your screwed the auto hub doesn't do you any good.

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06-05-2004 03:41 AM  13 years agoPost 8
parrott

rrNovice

Morehead City NC

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I did say when you cut power and I usually cut power when I land.
Why don't you just buy the parts that are made for the Hornet?

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09-12-2004 04:19 PM  13 years agoPost 9
Hivoltage

rrApprentice

Ohio

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Sanded too much off the main gear?

I must have sanded too much off the main gear, when I went to remove my front pinion the carbon rod where the front gear goes on was frayed.

I took that whole top off the main gear like somebody told me....WRONG. Anybody agree?

I Dont Have No Stink'in Signature

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09-12-2004 04:24 PM  13 years agoPost 10
johnb

rrKey Veteran

Guildford, Surrey UK

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where the front gear goes on was frayed
that can happen if you use snips or such like to cut the carbon rod.

I had problems killing the conical gears and raising the main gear up by the sanding method definitely has fixed the problem,

jb.

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09-15-2004 08:46 PM  13 years agoPost 11
HeliHerb

rrNovice

Falls Church, VA

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pinion problem

I had some slippage and was destroying the 10-tooth conical every ten flights or so. Am using the one way from DeeTee. I determined mesh was the problem and causing eventual tail gear slippage. You cant sand down the top of the one way main gear, as the bearing sits there.

I removed the main gear and the washer above it which sits between it and the bottom of the main frame. I thinned the washer very carefully on some high grit paper about 1.5 thousandths of an inch and replaced everything. Gear mesh between conical and main gear conical is now perfect and very smooth.

Herb

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