Sent: Friday, March 19, 2004 9:49
PM
Subject: [FlyRotary] Re: Cooling
Ducts
The 1.75" dia tubes should enable it to breath fairly well
even with the long lenghts of runner. It will be interesting to see what
you max rpm turns out to be.
Hi Ed.
Well, I'm expecting good power, and am more interested than anyone to see what
the climb rpm is on the first flight. I haven't changed the pitch of the
prop, so this will be a direct comparison between the turbo installation at 5
psi, and the new NA version. I'm actually willing to run 7500 rpm
for speed runs if necessary. We'll see how that works
out.
As for cooling
ducts, there's NFW my ducts are going to come close to resembling what
you suggested. When I actually started looking at it today, I realized
that the sides of the inlets are almost a straight shot back to the evap core
since the core is mounted at an angle. The closest side to the inlet is
only about 4 inches, and the longest is only about 9 inches. Not going
to do much shaping in that small of a space. I'm afraid I'll have
to hope for brute force cooling, with minimal assist from proper
shaping.
I only got
the rough foam cores made today. They fit inside the cowl, and I
marked the inlet. Tomorrow, I have to actually shape it, and
hopefully have time to glass them also. Have I ever mentioned that I
hate fiberglass :-)
Rusty
You gotta do what you gotta do,
Rusty
However, my ducts are inlets are 7"
from the core at their longest, so sounds pretty much the same
constraints. I know - you just don't want to do all that 'figguring and
calclating" - well, always time for that the second time around (if you need
it of course {:>)).
Yes, it will be very interesting to
see how your NA stands up to your turbo installation at 5 psi.
And, Yes, you have mentioned hating
fiberglass. Despite the fact I've now done plenty of it and am
considered the "fiberglass man" around our pea patch - which means I'm the
expert because I've actually put resin to glass - I still hate it.
However, there is no question it is the way to go for some things as far as
time is concerned.
Good luck and let her
roll
Ed
Anderson