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Re: REFLECTOR: Canard Well
James F. Agnew wrote:
> Alan Shaw wrote:
> > Rene' Dugas wrote:
> > > Dear Folks,
> > > What is the deal with the canard well? I'm attaching the elevators
> > > now(actually yesterday). Why would we want a well at all? Why not a
> > > glass shelf to cover the big well constructed to not interfere with the
> > > hinges of course? If not fiberglass the flexible teflon sheating
> > > reinforced to prevent air flow into the well.
> > You are describing the gap seal again. I thought I put that to bed when I
> > explained that's how we got the test plane to deep stall TOO EASY.
> > > Do we not aspire to
> > > laminar flow here too?
> > That's always gone after the widest point anyway.
> > > I do not understand why we want air to go into
> > > this well. HELP me aerodynamically.
> > When we slow down and put the elevator down then air goes through the gap
> > and over the top of the elevators providing the type of lift and pitch
> > control that we need.
> > > I potted my elevators a tad too deep so i'll be
> > > sanding off part of my top overlap
> > If you cut that any more your gap may become to big at neutral.
> > > I'm also planning a fuel cut off valve (on and OFF) near the pilot from
> > > the sump to valve to gascolator on firewall. Any suggestions.
> > Yes, don't bother. Fuel shut off valves are for problems with fires when
> > your engine is on the front. With a rear engine problems associated with
> > all that extra plumbing or the valve or the people using the valve (and the
> > airplane) are far far more likely to get you hurt than by not having a shut
> > of at all. Planes frequently crash because the fuel valve is in the wrong
> > position...if there is not one then it is always in the "right" position.
> > This seems to be another thing like the human appendix that airplanes have
> > picked up. It might just get infected some day an need some fast hot cajun
> > surgery. The Velocity has it's own special "appendix".....that is
> > something it was born with, that does it no good, but can cause a lot of
> > problems especially when your bird first gets kicked out of the nest.
> > Any guesses as to what it is?
> > Alan Shaw
> Alan, I don't know how I can have the valve in the wrong position, its
> on or off. If the valve is off the engine isn't running. To shut it
> off you must first raise the switch protector cover and then throw the
> switch which then turns on a red flashing light to let you know that you
> just shut off your fuel. If you have an engine fire there is no was to
> stop the windmilling prop from continuing to pump fuel into the engine
> compartment. With the Franklin it is worse since the carb is so low
> that the fuel will just run out by gravity.
> // James F. Agnew
> // Tampa, FL
> // Velocity 173 FG Elite ( http://www.VelocityAircraft.com/ ) under
Boy! I'm beginning to get confused by all this. If I have an electrical
failure, how does the electric shuttle valve work to turn off the fuel?
Also, I was taught to turn off the master and the mechanical fuel valve
to "OFF", and unlatch the door just before "splash down" (front
engine of course). Why did a French man name Berlot have to change
every thing 90 years ago?