Re: Re: Propeller camber

From: Bill Gowen <wdgowen_at_gmail.com>
Date: Thu, 8 Apr 2010 20:45:05 -0400

My F1L prop has about 1/16" camber at the maximum chord of 1 1/2". This is about 4%. It has worked pretty well.

  ----- Original Message -----
  From: ykleetx
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Thursday, April 08, 2010 8:25 PM
  Subject: [Indoor_Construction] Re: Propeller camber


    
  Hi, Bob,

  I'm building a simpler version of Laurie Barr's F1L. In his plan, he calls for 14.7" diameter, 26" pitch, and 10% camber. Like John Barker noted in a related message, the 10% camber effectively adds to the pitch. 10% seems like a lot, but apparently this prop specification has worked well. I'm not sure what exactly to think, but am inclined to follow the specs to the plan and see how it works.

  I'm planning to build a helical prop form without camber using styrofoam and a hot wire (and I mean hot wire -- 1/16" music wire heated over the stove). I then want to build the camber form separately -- using either balsa or styrofoam. This way, I can be precise about the camber and experiment with different cambers without carving differently pitched prop forms.

  -Kang

  --- In Indoor_Construction_at_yahoogroups.com, <RLBailey_at_...> wrote:
>
> In addition to Nick's reply, I recommend 3 - 4% camber on blades. Much less usually means lots of revs and not much thrust.
>
> Bob
>



  
Received on Thu Apr 08 2010 - 17:45:16 CEST