REFLECTOR: 2 bladed prop

[Gary Stull]

I have to agree on that one. I have a 2 bladed prop for a back-up. Extremely noisy and not as afficient as my 3 blade Performance prop
  ----- Original Message ----- 
  From: Jim Agnew 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Sunday, September 16, 2007 6:47 PM
  Subject: Re: REFLECTOR: 2 bladed prop


  Sam DaSalvia has extensive experience with two blade props.  They are noisier and vibrate more.  If I'm not mistaken the EZ wing is above the prop center-line and doesn't seem to have as much of a problem.  He bought my old Catto 3 blade and only uses the 2 blade as a backup.

  Jim
   
  James F. Agnew
  Jim_Agnew_2 at Yahoo.Com
  Tampa, FL
  Velocity 173 Elite Aircraft Completed & Flying 



  ----- Original Message ----
  From: Chuck <c.harbert at comcast.net>
  To: reflector at tvbf.org
  Sent: Sunday, September 16, 2007 4:18:41 PM
  Subject: REFLECTOR: 2 bladed prop


  Does anyone have any experience running a 2 bladed prop on a V? I know the 
  long EZ racers use them, but I wondered what are the pro's and con's of 
  these props. I know you would get a "blanking" when going thru the 
  horizontal wing/cowl area, and you'd increase the horsepower per blade. It 
  would be noisier and less smooth, but lighter than a 3 blade. I've read that 
  a 2 blade is theoretically the most efficient type prop, but aren't as good 
  for takeoff and at higher altitudes. I gues if the racers use them, they 
  can't be that bad.

  Chuck H 

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