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General control line discussion => Open Forum => Topic started by: Greg Hart on February 04, 2014, 03:03:49 PM

Title: 4 blade cf props
Post by: Greg Hart on February 04, 2014, 03:03:49 PM
Who makes good 4 blade CF props?
Title: Re: 4 blade cf props
Post by: Mark Scarborough on February 04, 2014, 03:35:06 PM
Greg,
why a 4 blade,, and what size,, I have a 4 blade CF prop I wont use,,
Title: Re: 4 blade cf props
Post by: Steve Helmick on February 04, 2014, 05:17:42 PM
For CF props, I'd check with Randy Smith, Alan Resinger, Bob Whitney and Eliminator Props (see Vendor's forums) in no particular order. I know Randy had a few sizes of 4 blade CF props at one time...doubt about the others. Brian Eather might...ask Alan about that. Three blades are easier to source!  H^^ Steve
Title: Re: 4 blade cf props
Post by: Greg Hart on February 04, 2014, 06:00:30 PM
Mark, going on a spitfire using a RO-jet 61 Not sure what size 4 blade would work best??
Title: Re: 4 blade cf props
Post by: Doug Moon on February 04, 2014, 06:58:31 PM
Your max dia will probably be 12" but you may end up with a happier motor on 11.75" dia with 3.75-4-4.25 pitch range.  I used to run Eather 4 blades for a long time and 12x3.5 was an awesome prop.  I have another with 3.5 pitch and can't get anything else to fly on it.  Not much traction. 
Title: Re: 4 blade cf props
Post by: Paul Taylor on February 04, 2014, 07:06:36 PM
Some Supermarine Spitfire's used 3 blades.
Title: Re: 4 blade cf props
Post by: bill rutherford on February 04, 2014, 07:46:13 PM
The very first spitfires used two blade props Wood I think. Bill Rutherford
Title: Re: 4 blade cf props
Post by: Mike Keville on February 04, 2014, 07:47:48 PM
Quote from: bill rutherford on February 04, 2014, 07:46:13 PM
The very first spitfires used two blade props Wood I think. Bill Rutherford
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True.  Spit' Mk. I - two-bladed wooden props.
Title: Re: 4 blade cf props
Post by: bob whitney on February 04, 2014, 09:08:03 PM
it would take about $40 for mold material and the frame for a 12 in 4 blade prop plus  2 props to make the master
Title: Re: 4 blade cf props
Post by: Trostle on February 04, 2014, 09:21:32 PM
Quote from: Paul Taylor on February 04, 2014, 07:06:36 PM
Some Supermarine Spitfire's used 3 blades.

And some Spitfires used 5-blade props and there were some Seafires that had two three-blade counter rotating props.

KT
Title: Re: 4 blade cf props
Post by: Mark Scarborough on February 04, 2014, 09:55:29 PM
Greg, Private message me, or email me
Title: Re: 4 blade cf props
Post by: MarcusCordeiro on February 05, 2014, 09:56:36 AM
Kaz Minato has them...
Here's one on the nose of my friend Rafael's Trivial/PA 65

Marcus