--- In Indoor_Construction_at_yahoogroups.com, dgbj@... wrote:
>
> For a slow moving prop, you can count and time turns during
flight. At
> fixed intervals during the flight, count and time ten turns.
Divide ten by the
> times to get revolutions per second.
Have you ever done this?
<< Do this ten or twenty times during the
> flight. Record the time of each measurement. >>
But have you ever done this?
<You can then plot revolutions
> per second vs time. Draw a smooth curve through the points. Now
you can
> integrate the curve to get actual turns expended at each point in
time. Check to see if the total turns is consistent with the turns
actually used; turns wound in less turns remaining on landing. >>
Have you ever done this?
<< Now with turns against time known,
> use your unwinding torque curve to get torque vs time. From a
level flight
> test, you can then tell exactly the time the plane reaches level
flight, the
> length of the ascent and the length of the descent.>>
Have you ever done this? If so, on what model? Your plastic prop
Daniflyer?
You have time to answer every question about indoor, but only excuses
about not having built a real indoor model, such as LPP, and to
report results. Henceforth, this will be your price of admission to
continue teaching on Indoor_Construction.
The Moderator.
Received on Tue May 01 2007 - 09:42:25 CEST
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:45 CET