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xntrick - 22 Jul 2004 01:55 GMT

That is fast n stable for the "Jett 50 with tuned pipe.

The lazer arrow cant handle it as it brickwalls over 120 mph. Yep seen
the "Diamond dust" n "whiplash and they are on the cards but maybe some
one else knows better.

Must be able to ship to Uk and sorry to ask for the holly grail but i
need to know how to get the noise down.....no dont laugh!

Regards to all <G>

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Abel Pranger - 22 Jul 2004 03:42 GMT

>That is fast n stable for the "Jett 50 with tuned pipe.
>
[quoted text clipped - 6 lines]
>
>Regards to all <G>

Not laughing, sounds like a lot of fun. Can't top the Whiplash or DD
options, but can comment on the noise. IIRC the DoE insists on a
limit of 82 dBA at 7 m, and BMFA is very much in league with them to
enforce it. Not hard if the prop (assuming a prop a .50 can turn
efficiently) is absorbing up to about 1.0 bhp; can be done up to 1.5
bhp or so if you really know what you are doing. Jett .50 with TP
and a modicum of tuning expertise, I'd expect 3+ bhp if you're only
half trying. That will put prop generated noise alone about 10 dB
above what the law allows. You might fudge a dB or two, but not a
whole order of magnitude.
Sorry 'bout that, but I didn't make up the laws of physics. That's
handled in the holy grail department.

Abel

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Model Forum / Radio Controlled / Air Models / July 2004

Looking for a Delta