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Home✈️Aircraft🚁Helicoptere-Elec-Helicopters New or Limited ActivityMS Composit › Walt's tail drive--does it make the tail conicals sit slightly askew?
11-08-2005 07:28 PM  14 years ago
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johnny b

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Central Coast, CA

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Walt's tail drive--does it make the tail conicals sit slightly askew?
I've acquired several Hornets and a box full of spares in good trades over the past six months.

This last week I tore down and rebuilt four different Hornet tails. Each one had mesh issues and other tail issues, which leads me to believe that the #1 reason people bash the Hornets (and/or sell them cheap or trade them away), is they don't get the tail set-up right.

The CF drive tails were easy to get properly aligned. But I have one Hornet with the upgraded Walt drive. Try as I might, the conicals don't line up exactly like Darkhorse or Eric L's site's pictures. Real close but not quite. It runs smooth and all, but I was wondering if when you use Walt's tail drive upgrade, if other people have noticed this.

Trust me, those conicals are on TIGHT. But I've tried to align them for a prettier mesh, and they just don't line up the same as the CF drive tails. If I line them up "perfect," the conicals are way too tight on one another.

Just checking. Thanks.
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11-08-2005 07:43 PM  14 years ago
Blade-X

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Singapore

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I dun lie mine up exactly, cos when I do that the mesh is really awful and ain't free running. And plus the added friction gives me bad tail vibes.
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11-08-2005 07:52 PM  14 years ago
johnny b

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Central Coast, CA

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Thanks for the thoughts. Mine has plenty of gear meeting gear, so its not going to slip out easily or anything. And it spins very well. If I made the conicals line up "pretty," they would be way too tight on each other.

For some reason, the tails with the CF drive shafts line up much more like they're supposed to, so I just wanted to check on this.
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11-08-2005 10:15 PM  14 years ago
Micro-Maniac

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Pasco,Washington Formerly: Captain Chaos

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I spent a lot of time playing around with my Walt tail drive getting the fit just right in the tail boom.

If my rear gear was on too far, the bearings would get sandwiched too tightly when I pushed the front conical on causing a grainy feel when spun.

If the rear gear wasn't on far enough, the bearings would get pushed out the ends of the boom slighty causing a small bit of sloppiness.

Mine ended up with the front bearing being well sandwiched between the lip of the Walt drive and the front conical gear, and the rear gear positioned just right to sandwich the bearings in the boom well but not un-sandwich the front bearing between the Walt drive and front conical gear.

There was room on the rear of my Walt drive shaft for another bearing so I used one of the original center bearings that fit on the end of the Walt shaft itself between the bearing with the rear gear in it and the lip of the Walt drive shaft. I figured this would be a good suppliment for the bearing on the plastic gear to be coupled with a bearing on the metal shaft as well.

The result of all this is very smooth. I really like it.

The mesh on the main gear seems fine to me, but I couldn't get around having to leave a bit of lash in the tail gear box for it to spin smoothly enough to meet my satisfaction.
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11-08-2005 10:57 PM  14 years ago
johnny b

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Central Coast, CA

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Thanks for the input guys.

Sounds like I'm okay. It runs very smoothly and has good teeth contact, just isn't picture-perfect alignment like most pics of good set-ups shows it should be.

In contrast, the CF drive tails all set-up for perfect alignment. Funny that none of them came to me this way, just took some time and effort to get them aligned and smooth.

The tail's the really only tricky part of this little heli, isn't it?
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11-09-2005 12:26 AM  14 years ago
Micro-Maniac

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Pasco,Washington Formerly: Captain Chaos

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Eh, forget what I wrote here before. I took my tail box apart and reassembled it again but couldn't reproduce that nice gear mesh I thought I had before. It still requires a bit of lash for it run smoothly. The only thing I actually fixed was the output shaft wobble/vibe and I'll put that fix in a post over in the tail vibe thread.

Sorry,
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