Re: Circle radius changes?

From: Bill Gowen <b.gowen_at_earthlink.net>
Date: Tue, 26 Dec 2006 17:02:17 -0500

Dave
In my experience most models open up the turn at the beginning of the flight. I think this is mostly due to the opposite stab tilt you get from motor torque. More left thrust is the most usual recommended fix if a fix is necessary. Differences in MS strength can make a difference in this effect.

  ----- Original Message -----
  From: torqueburner
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Tuesday, December 26, 2006 4:50 PM
  Subject: [Indoor_Construction] Circle radius changes?


  My SO students had their first flying session today. They trimmed for best cruise, as
  recommended last year by Bill Gowen. Then they wound to max and backed off, going for a
  flight just short of the ceiling beams. The better of the two planes was a bit overweight, 8.1
  grams, and did a best flight of 2:31, no touch, under a 19 ft. ceiling.

  On thing that was perplexing, was that the plane turned in a very wide circle at first, using up
  more than the width of a basketball court for the first half turn. After that, the circle was
  only about 2/3 as large for the rest of the flight.

  We're previously had some planes that would turn tighter in the beginning, but any ideas why
  the circle is wider right after launch? They are using a combination of left thrust, left rudder,
  and stab tilt - is one of these less effective when the plane is flying faster?

  Dave Drummer
  Kutztown Sr. High School



   

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Received on Tue Dec 26 2006 - 14:04:56 CET