Re: ram pressure

["mikey" <masa@psci.net>]

brian milchalk please change my e-mail address to masa2@psci.net. thank you.
mike schmitt, velocity elite n72m

----------
> From: Brian K. Michalk <michalk@awpi.com>
> To: Al Gietzen <alventures@email.msn.com>
> Cc: reflector@awpi.com
> Subject: Re: ram pressure
> Date: Thursday, May 28, 1998 10:52 AM
> 
> > At least one issue would be vapor lock.  When the electrical pump fails (or
> > electric system failure) you have no pump.  May not be a problem during
> 
> Hmm.  Okay.  Failure analysis:  What is more failure prone?
> I'm already installing dual batteries with primary and secondary
> busses.  Two boost pumps?  I don't know.
> 
> > Or even without vapor lock; can you get enough flow to the carb for full
> > power operation without pressure?  Don't count on it!
> 
> That's what the tests are for.  The Bingelis books outline tests
> for gravity feed.  You place the plane in level and at climb
> attitude.  Fill up the tanks and then make sure you get
> something like 1.5 times the fuel flow of max power operation.
> I'm not sure of the value, but it's like 1.5 or 2.  You have to
> go through all of the plumbing that includes filters and gascolators
> too.  Also make sure you are not getting any added benefit from 
> siphoning.  Another thing is that you must get this sustained
> rate until the tanks are empty.
> 
> I'd have to go look at the books again, but this is as well
> as I can recall at the moment.
> 
> -- 
> Brian Michalk  <http://www.awpi.com/michalk>
> Life is what you make of it ... never wish you had done something.
> Aviator, experimental aircraft builder, motorcyclist, SCUBA diver
> musician, home-brewer, entrepenuer and SINGLE!