Let's say someone comes up with a model for the old Pan Am Clipper, that
wants to land fully loaded with passengers and half loaded with fuel. The
actual aircraft will sink it's fuselage as far as 5 feet into the water,
perhaps more if landing in 'seas'. There absolutely must be some code to
support sea planes landing in the water.
The only references I can find seem to be rather old:
http://naca.central.cranfield.ac.uk/reports/1945/naca-report-810.pdf
'Analysis and Modification of Theory for Impact of Seaplanes on Water'
(that seems to be a NACA not NASA doc for you historiuans!)
However, if there is at least a primitve method of dealing with seaplanes,
perhaps simply not setting crash condition to true, and increasing headwind
up to a resistance equating the floats hitting the water, that would deal
with the condition in the short term.
Then, there is the issue of jet propelled aircraft. I have some wonderful
footage of an F-14 doing a fly-by of a carrier at 20 feet off of the waves.
Sure, it looks cool... but according to historic data you can only pull this
move if you are going at least as fast as xx knots. If you fly a turbojet
powered airplane too slow, too close to the water, then the forward
turbulence of your aircraft will cause you to ingest water through your
intakes.
How about a prop plane like a C-123? The farthest a propeller's blade is
going to reach is a good 4 feet above the bottom of the fuselage? Shouldn't
FG be 'smart' enough to realize that in extreme conditions a plane like this
could, theoretically, touch the surface of a body of water yet still not
crash?
Sigh... I guess I have been looking for a part of FG to work on. If someone
makes it so I could work this issue and come up with some reasonable rules,
so that it doesn't end up with patch-on-patch-on-patch to deal with the
issue of aircraft intersecting water.
----- Original Message -----
From: "Lee Elliott" <[EMAIL PROTECTED]>
To: "FlightGear developers discussions" <flightgear-devel@flightgear.org>
Sent: Friday, June 10, 2005 4:59 PM
Subject: Re: [Flightgear-devel] poll
On Friday 10 Jun 2005 21:20, Ampere K. Hardraade wrote:
hmm... flying undersea. Isn't that what submarines do?
Ampere
That's an interesting idea:)
Relative viscosity of water must be a bit like super/hyper-sonic
in air but the relative speed-of-sound for the mediums won't
match at all.
Is there any close analogue to cavitation with propellers?
LeeE
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