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In a message dated 9/21/2006 5:39:02 P.M. Central Standard Time,
aadamson@highrf.com writes:
So....
(don't ya just love it when an email starts this way :) )
I've seen
most IO-550's with 2 boost pump switches. I'll assume they are
used
as follows.
Low Boost - switched on at or above 10K feet and run for
the duration of the
flight at that level to provide added purging of vapors
or bubbles that
might exist in the lines
High Boost - Prime at
startup.
.......................So,
could you splain to me, what the various boost modes are or if there
is
another compromise that I haven't thought of with one
switch.
Alan,
So, think about what you should be doing before a hot start - circulating
cool fuel thru the heat soaked engine pump, throttle body and back thru the
return line. Which switch to twitch begs the cool fuel tool query.
Someone who has suffered the vapors will surely answer.................
Grayhawk
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