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slyck(at)frontiernet.net
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 Posted: Tue Sep 25, 2007 4:40 am Post subject: bad vibes update |
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I got the 70" warp 2 blade pitch fine tuned. Overall better
performance than the powerfin
due to less drag. -Not quite as good in climb but has a wider envelope.
The downside is a significant rough spot at 2000 rpm which is easy to
avoid and
a pulsating in and out sound at cruise settings. Sounds like a
Hughes 269.
I'll run it for a while and see if I can get used to it or drives me
nuts.
BB do not archive
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Tue Sep 25, 2007 4:54 am Post subject: bad vibes update |
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> a pulsating in and out sound at cruise settings. Sounds like a
| Quote: | Hughes 269.
I'll run it for a while and see if I can get used to it or drives me
nuts.
BB do not archive
|
Bob B:
My buddy's 3/4 scale Jenny with 3 cyl Geo mad a
"rum........rum...........rum" sound when it was flying at cruise. I could
hear in from the ground. He was running a two blade wooden prop. It was
pretty long and I can not remember the exact length. Redrive, cog belt, was
constantly trying to eat its self. Did a lot of serious experimentation and
testing. Never could get it to operate reliably. Eventually sold it.
john h
mkIII
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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