--- In Indoor_Construction_at_yahoogroups.com, dgbj@...
Gary H wrote,
<<I expect I will use a fixed blade prop of fairly conventional
design>>
In Limited Pennyplane, they are all "fixed blade." I am talking
about obvious flaring vs. non obvious flaring. Since your theory is
all about efficiency and assumes that maintaining highest efficiency
also delivers the highest TIME, I think you should have to stick to a
non flaring prop for this experiment. Is not a high flaring prop,
which presumably flares away from the pitch it was formed to,
generally accepted as somewhat less efficient than a (reasonably
pitched) non flaring prop, all other things equal?
<< but if I decide I can get better efficiency with a twisting prop,
I will do so.>>
Oh, oh. So how will you KNOW what is more "efficient?" Seems it
ought not be according to raw TIME, because then you are measuring
the same thing, the only thing I am measuring. And after that, you
may discover that a less efficient, heavier motor swinging a bigger
hammer less efficiently, can lead to more TIME.
Gary wrote,
<<I will not accept any limitations that are not equally
applicable to all entering the contest.>>
Everyone else is also free to accept the same limitations you have
already imposed in trying to teach us things like this,
gARY H wrote,
<<The important question for prop design is not about using it to
control RPM but using it to convert torque energy into altitude
energy with the greatest efficiency.....If the plane climbs too fast
with an efficient prop, a thinner motor producing less torque is
indicated. If the plane is capable of hitting the ceiling, a motor of
lower weight is indicated.>>
Surely the above is NO limitation upon achieving your efficiency, so
please use only your own advice in this challenge.
<<(am I
actually capable of building a prop without several points of
innovation? Idoubt it.)>>
Oh, please, please innovate a better prop, at least if measured by
time. I will gladly copy it, fly with it, and give you the credit.
Mark Bennett
(can't I speak as a regular citizen too?)
Received on Fri Mar 23 2007 - 07:57:55 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:45 CET