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tail heavy bipe

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tail heavy bipe

Old 11-04-2004, 03:51 AM
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trentos
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Default tail heavy bipe

i have just finished setting up a 40 size bipe which is a JUNGMEISTER (manufacturer unknown) and when ready to balance i found the point and lifted,,, and it was really tail heavy,
so i mooved the tank up as far as possible and all the gear up under the tank and then balanced and it was still dangerously tail heavy,
so worst came to worst and i put some lead in the cowl,
and that made a difference but still a little tail heavy,,

so i am asking does any body have a JUNGMEISTER biplane if so r they ment to b a little tail heavy???,,
or does anybody have any other ideas on how to defeat this problem with tail heavyness???
Old 11-04-2004, 07:09 AM
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pettit
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Default RE: tail heavy bipe

Remember this advise:

"Nose heavy planes fly poorly.

Tail heavy planes fly once!"

Try moving servos and battery as far forward as possible. Consider an on-board glow plug lighter.

Use a "heavy hub" in place of your prop nut (they're 2 ounces)

Put the weight on the engine mount or firewall, not the cowl.

Under any sort of vibration, the extra weight on the cowl will shake it off the plane.

Bottom line: add as much weight as necessary to balance
Old 11-04-2004, 07:21 AM
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DBCherry
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Default RE: tail heavy bipe

Agree.

You could also try moving the engine forward as much as possible, maybe add a 1/4" (or two) ply shim behind the engine mount.
Dennis-
Old 11-04-2004, 07:35 AM
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ksechler
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Default RE: tail heavy bipe

You could also put on a bigger engine. If you have to add weight you might as well get something for it!
Old 11-04-2004, 07:35 PM
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trentos
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Default RE: tail heavy bipe

yes well the mount is not a screw on!! it is a build on
so its a reall hair bitter!!
ive balanced it so far and i hav 2 hold it a fingertip further bak than where its sposed to be balanced is that 2 much???

im am goin to test fly it to morro so yeh!
Old 11-04-2004, 07:51 PM
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trentos
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Default RE: tail heavy bipe

yes well the mount is not a screw on!! it is a build on
so its a reall hair bitter!!
ive balanced it so far and i hav 2 hold it a fingertip further bak than where its sposed to be balanced is that 2 much???

im am goin to test fly it to morro so yeh!

it looks so good i just dont want it to hav a bingle
Old 11-05-2004, 12:32 PM
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MinnFlyer
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Default RE: tail heavy bipe

ORIGINAL: pettit

Bottom line: add as much weight as necessary to balance
Ditto!

Many people feel that adding weight will bring the wrath of the airplane gods down upon you - - - B.S.!

Adding weight is not a sin - trying to fly a tail-heavy airplane is!

So like Dick said, add as much as you need.
Old 11-05-2004, 03:20 PM
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CrashBurn69
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Default RE: tail heavy bipe

Depends on how big your finger tip is lol. Thats not bad, Just remember dont make sudden elevator movement until you get a feel for the plane. But a lot of bibes are a little tail heavy because the nose is so much shorter than the tail, and it calls for adding weight. Just remember to test how slow it stalls way up high so you know how much you can slow it down to land, from adding wing loading in the extra weight.
Old 11-05-2004, 07:53 PM
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trentos
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Default RE: tail heavy bipe

WELL THANX EVERYONE today is its maden flight so i will report back tonite whether its the gr8est plane or whether its in a million pieces!!

yeh well i tried most of ur ideas but most were not able.. so to the frild i go

-TRENT-
Old 11-06-2004, 08:14 AM
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CrashBurn69
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Default RE: tail heavy bipe

How did it go?

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