Re: Re: Prop Stalling

From: Bill Gowen <b.gowen_at_earthlink.net>
Date: Thu, 31 Jan 2008 09:07:45 -0500

Brant
The situation you describe is not necessarily something to correct. It is a great way to increase your flight time. The trick is to get the plane into that kind of flight profile without crashing. If you can get everything to work, it will give an effect similar to dropping a heavy ribbon under the old rules. I've replaced the MS on my LittleSquare with one that is much weaker in hopes of inducing that kind of flight pattern.

  ----- Original Message -----
  From: brantfredrickson
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Thursday, January 31, 2008 8:48 AM
  Subject: [Indoor_Construction] Re: Prop Stalling



> plane would start climbing out and then would sort of stop and fall
> backwards a bit then resume climbing. Is this a prop stall ???

  Hi Leroy,

  When we use the term prop stalling, the model won't climb at all.

  However we have had flights similar to yours. We found that at high
  torque, the model will dip the left wing and the model will circle
  around without climbing until the motor unwinds enough for the model
  to fly without the left wind dipping, then the model starts to climb.
  We correct for this by adding wash-in the the left wing to compensate
  for the higher launch torques.

  Also high launch torques have a tendency to pull the tail down. This
  also prevents the model from climbing until the motor unwinds enough.
  The only solution we found for this is a building a stiffer motor
  stick/ tail boom combination.



   

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Received on Thu Jan 31 2008 - 06:07:50 CET