Re: Re: VD formula

From: Bill Gowen <b.gowen_at_earthlink.net>
Date: Thu, 26 Oct 2006 13:31:14 -0400

A quick explanation:
VD means variable diameter. VP means variable pitch. Both are methods of slowing prop RPM's and the model's climb rate during the high power part of the flight. Without one or the other of these methods it's generally necessary to launch with less than the maximum number of turns in a motor. Some competition classes prohibit the use of such devices. In those classes flaring props are used to get a VP effect without the mechanism. In very high ceiling sites it's not usually necessary or desirable to use VD or VP or flaring props because you want the model to climb as high as possible.

  ----- Original Message -----
  From: mike k/ mary
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Thursday, October 26, 2006 12:51 PM
  Subject: Re: [Indoor_Construction] Re: VD formula


  You are not alone Barry, I am in the dark. N^2, I think might be to the
  second power. (.) I think might be times. VD could that be variable
  diameter or distance from the center? All
  of this is new to me.
  mike k



   

[Non-text portions of this message have been removed]
Received on Thu Oct 26 2006 - 10:32:34 CEST