Jeff Spitzer wrote:
At 05:54 PM 2/15/99 -0800, you wrote:
Jeff Spitzer wrote:
At 10:05 AM 2/15/99 -0800, you wrote:
The first thing that happens when a prop throws a blade
is the engine departs the airframe because of the severe
unbalance and resulting severe vibration. This means you
will die as the airplane will be uncontrollable with a
way too far forward CG.
In a tractor AC if you have the presence of mind you can push over in
a vertical dive once the engine leaves the airframe and just
before you augar in.... flare to crash land. This is not something
one can practice.
I hate to be so upbeat about this but I don't feel I have
the knowledge and experience to do a variable pitch three blade.
Paul Lamar
Actually, no. In a pusher, losing the engine will cause a forward C.G.
which only increases your trim drag and minimum controllable speed based on
tail power. You could theoretically dead stick it in at some higher than
usual airspeed. In a tractor the aft c.g would cause an immediate and
total loss of static stability which results in the falling leaf scenario.
Did you remember your parachute?
Jeff Spitzer
I disagree. Canards don't have a lot of control authority.
I doubt you will get it much below terminal velocity.
If the engine falls off your go'ing to die. It will probably
augar in like a lawn dart.
You got to push the tractor over right now so the CG is lined up with
the drag vector. Since the firewall is now exposed it will have
much higher drag than the canard without an engine which will
also help the tractor.
Paul Lamar
Who said anything about canards? Any airplane that has suitable landing
characteristics (i.e. enough elevator power to get near Clmax at landing
speed) will have plenty of elevator power to maintain reasonable speed with
a c.g. shift forward attributable to an engine loss. I'm sorry to say your
understanding of stability is lacking Paul. You're push it over and you'll
be o.k. scenario is analogous to saying that an excessively loaded column
won't buckle as long as noone touches it or moves it. Stability by it's
very nature doesn't allow some singular solution because if the system is
unstable an infintesimal movement away from such position leads to
divergence. Such is the case for an airplane with c.g. behind the neutral
point and without high speed computers to electronic/computer controls to
catch it. This is the fundamental definition of static stability.
Jeff Spitzer
Its a joke Jeff!!!!!!! Where's your sense of humor?
If your in a tractor airplane and the engine rips off your going to die
anyway.
Nobody can flare from vertical terminal velocity and live. Not even
Bob Hoover. He is the only guy I know that has come close.
BTW Do you have Fluid-Dynamic Drag?
Paul Lamar
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