He's at Kingaroy for the club class and will be in the clubhouse about
now.....drinking ginger beer of all things!> Date: Thu, 9 Oct 2008 10:48:27
+1100> From: [EMAIL PROTECTED]> To: [email protected]>
Subject: [Aus-soaring] Looking for OBH> > Does anyone have contact details for
Bill Hatfield??> > Cheers> Mark> > > -----Original Message-----> From: [EMAIL
PROTECTED]> [mailto:[EMAIL PROTECTED] On Behalf Of Gary> Stevenson> Sent:
Monday, 15 September 2008 9:00 PM> To: Discussion of issues relating to Soaring
in Australia.;> [EMAIL PROTECTED]> Subject: Re: [Aus-soaring] Flying on Mars> >
How did that post from an earlier SF thread on this forum ("Dancers at> the >
End of Time") go -"Feekit"?> Gary> ----- Original Message ----- > From:
"Texler, Michael" <[EMAIL PROTECTED]>> To: <[EMAIL PROTECTED]>; "Discussion of
issues relating to Soaring> in > Australia."
<[email protected]>> Sent: Monday, September 15, 2008 11:47
AM> Subject: [Aus-soaring] Flying on Mars> > > >I have done some flying on
Mars.> >> > Pretend, anyway.> >> > I have X-plane 9 on my Mac at home, part of
the flight sim is the> ability > > to fly on Mars (with Martian elevation data
and terrain to boot).> >> > The main canyon (Valles Marineris) is up to 7km
(almost 23,000') deep> >> > Olympus Mons is 27km (88,500') above the mean
surface level.> >> > Hence the variation in air density between those two
places is huge.> >> > It is very tricky to fly.> >> > The air at mean Martian
surface is about 1% as dense as Earth's at see> > > level. The gravity is also
less than on Earth.> >> > Even taking off from the bottom of the canyon, your
indicated stall> speed > > and Vne are very close together (i.e. you are in
'coffin corner' for> most > > of the time).> >> > Your take off speed is very
near the speed of sound.> >> > Because of the reduced air density, control
effectiveness is very much> > > reduced, so turning is a slow process. Also, on
approach to land, and> drag > > producing devices (drogue chute, airbrakes,
flaps) don't work very> well, > > because of the thin air.> >> > Even slowing
down once on the ground is tricky, because of the reduced> > > gravity, the
weight of the aircraft on the wheels is less. About the> only > > way you can
stop is with arrestor cables.> >> > Have managed to take off from the plain
next to Olympus Mons and climb> to > > the top of Olympus Mons, but it took
several attempts because the> aircraft > > couldn't out climb the terrain.> >>
> I suspect thermalling on Mars might be out....> > (Unless you are very very
small)> >> > _______________________________________________> > Aus-soaring
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Date:> 9/14/2008 > 7:16 AM> > _______________________________________________>
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