"Ken S. Tucker" wrote in
:

On Jun 4, 7:56 am, Big John wrote:
On Mon, 2 Jun 2008 11:19:41 -0700 (PDT), "Ken S. Tucker"



wrote:
On Jun 2, 10:13 am, Tina wrote:
On Jun 2, 12:01 pm, "Ken S. Tucker" wrote:

On Jun 1, 4:39 pm, Tina wrote:

The induction port for the ram air on the m20J bypasses the
air filter as well, so we typically observe about a half inch
improvement in MP. That's in line with some of the other
numbers offered here.

I guess there's no free lunch. There is no way we want to have
an IO540 pull the airplane along, nor do we want the fuss with
turbo charging. The payback for our typical for real flight
mission is just not there. My thought was and is that if it
was something pretty obvious someone would have done it on a
homebuilt. Actually, knowing some of those guys, it does not
have to be obvious at all, they are really creative designers.

Tina, I think this analysis you posted is good,
" It's only a 360 cubic inch engine turning at 2300 RPM or so.
Isn't that a demand of, let's see, at 23 inches mp at sea level
that's 23/30 * 2300/2 * 360 / 12^3 or 180 cubic feet a minute? "

I see Tango 2 Denny has some interesting ideas.
Ken

Well, I think it's a dead issue for us. What is fun to think about
is, let's see, about 200 cubic feet a minute, that's 40 cubic feet
of oxygen a minute, or about 3 pounds. For 50% more O2, 1.5 pounds
a minute, or say 20 pounds to get to a pleasantly high altitude.
Maybe that translates in to dewer weighing a total of 50 pounds
with liquid O2? But it would make 15 inches of MP look like 22 or
so as far as the engine is concerned. I better get back to my day
job.

Without crackin' the books and pounding the abacus,
you look like +/- 20% using BoE (Back of Envelope)
calculation, which means you get either 80% or 120%
on your physics exam, you choose.

Resolved: psychologists should not be permitted to minor in the
physical sciences. All in favor?

OR pilots should not be permitted to engage in
psychology in this group, now what's the chances
of that happening...is "nil" close :-).
Ken
PS: What's the rationale of the 12,000' cruise?
You know about the "bends" don't you, if not
just read Berties post!

************************************************** *

Ken

Have you ever talked to anyone who got the bends flying? I have
thousands of hours and never have.

I have gone to 43K+ and made supersonic dives to 10K +/- with no
problems.

I have cruised for hours at 30K cockpit pressure and no problems
during let down and landing.

Is Mt. Everest summit at ~29K?
You can get a quick overview here,
http://en.wikipedia.org/wiki/Decompression_sickness
Ken


You're an idiot.


How's that kill file working out, BTW?

Bwsawahwhahwhahwhahwhahhw!



Bertie