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Dennis,
First let me say that you and your brother
apparently have too much spare time on your hands (just kidding!). Actually I'm
pretty impressed that you'd take the time to do this and document
it.
Having said that, I think Al makes a couple of
good points - you could conceivably make up a significant amount of the
measured difference with a good ram air system in flight.
And finally, while you are right - that you cant
buy much of a turbo for $500, it wouldn’t take much of a turbo to get an
additional 1.2". This looks like a lot of work ( and added complexity, failure
modes, etc...) for not a lot of payoff.
Mike
Sent: Monday, February 15, 2010 8:43 PM
Subject: [FlyRotary] Re: Air Pump
The problem I have with a belt driven unit is the bearings and
pulley - they increase the width and make it hard to fit between the engine and
motor. Attaching the fan to the crankshaft pulley solves that problem if a
fan can be found that will produce the needed air flow at our design rpm.
Plus one of the largest leaf blowers new is less than $500. Can't
buy much of a turbo for that price!
Dennis H.
Bill Bradburry
wrote:
Dennis,
I think the Lycosaurous people get about ¾ to 1 inch
of improvement with ram air at a couple of hundred mph. That seems
consistant with the airspeed of the air from your blower. Your idea to
attach a centrifugal blower up to the pulley is a good one. You could
make it belt driven like the alternator and with a small pulley, crank it up
to about 12K rpm!
Pictures??
Bill B
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