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Old Dec 10, 2012, 10:58 AM
RknRusty is offline
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United States, SC, Columbia
Joined May 2010
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Hi Ming. The needle is a Kustom Kraftsmanship 128tpi needle sold by Texas Timers for running pressure bladders. I'm using the thin walled tubing that TT recommends with identical setups on three of my planes. It's very stiff to turn and after every flight it's in the same place as when I launched.

There is one thing different about it from the other two I am flying. The engine peaks at only 1-1/3 turns. My two others peak at 2-1/2 and 3-1/2 turns on their Tee Dees. And it's very difficult to set slightly rich off-peak for launching. You can hear in the video how long it took to unload and come up to full speed, so I figured it was set plenty rich. Usually the Baby Flite Streak takes a lap to unload too, buts .051 runs beautifully.

I'm always careful to evacuate the bladder and not to pump any air into it. I haven't tried swapping needles, venturi's, etc. yet. Maybe it's as simple as boring the venturi a little wider.

I'll look for your Tube videos. I like watching combat planes.
Rusty
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Last edited by RknRusty; Dec 17, 2012 at 10:44 AM. Reason: removed a mistype
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