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08-21-2008 06:28 AM  12 years ago
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Nycatt

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New York

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Tail Control Rod
Can anyone please tell me the total length or pretty close to it of your tail control rod giving you 90 degrees at the slider and straight at the bellcrank. Then the rod from bellcrank to the servo. I'm pretty close but I just want to compare.

Thanks



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08-21-2008 10:42 AM  12 years ago
alchemist

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Auckland,New Zealand

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You will actually find if the front bell-crank is at 90degrees and the rear tail-slider arm is at 90degrees (exactly, as suggested in the build videos) to the boom, that the front bell-crank will bind before the rear hits the outer side (hub side) of the tail shaft. Admittedly you are talking about a couple of mm on the non torque facing/resisting side of the tail blade.

All that said, to get max mechanical throw in both directions on the tail sider (without the bell-crank at the front binding) the rear tail slider arm needs to be slightly off 90degrees when the front is exactly 90degrees.

Rather than trying to take an exact measurement and building the push-rod, prepare the rod and place it on the heli and build it to suit, which is what I did
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08-21-2008 10:51 AM  12 years ago
Dood

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Wescanson

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I screwed the balls on the threaded rod first (screwed them on half way)
Then set them in.
getting everything at 90 degrees, I ended up with 6mm of exposed threaded on each end. Thats what worked for me. Your results may vary.

One strong word of advice, though...

When you're gluing the rods in, Glue one side at a time! Let it cure for a couple hours, then go back and do the other side.
If you try to do both ends at the same time, you're gonna have a + air pressure inside the rod, and one side is going to keep sliding out on it's own. You'll be fighting it for hours. Ask me how I know.
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08-21-2008 10:28 PM  12 years ago
Nycatt

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New York

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I ended up with 6mm of exposed threaded on each end.
Is that with the ball links on or off?



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08-21-2008 10:36 PM  12 years ago
Dood

rrProfessor

Wescanson

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with the links ON, threaded on 50% of the way.

Don't take my word for it though. Center everything up to 90 degrees, and "dry fit" everything before final gluing.

And I threaded the balls on just half way, so there be plenty of threads to adjust the balls in either direction if I needed to.
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08-21-2008 10:45 PM  12 years ago
Nycatt

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New York

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Ok. So it sounds like you left 12mm of threaded rod. You put the ball links on half way and your left with 6mm exposed. Gotcha

Thanks



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08-26-2008 10:29 PM  12 years ago
Nycatt

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New York

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Dood

You were right on the money. 6mm showing was perfect.

Thanks again



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