3 bladed wood props

[Fred Quedenfeld jr]

Any body know what these are or what they are used for
Thanks
Fred Q fredf2c@copper.net

[bob whitney]

they are OLD 3 Blade props probly not safe to use but would be good for static scale judging 

[Will Davis]

I have a few of these that came with apost ww2 Japanese kit , , collectible, but not safe to fly ,

[MikeyPratt]

Any body know what these are or what they are used for
Thanks
Fred Q fredf2c@copper.net

Hi Fred,
I think they are hand made and maybe not that old.  When we were trying to get the OS 40 SFR to run properly many of us (me included) hand built props just like that.  Many of the hand made three blades were keyed and epoxied together from cut down props.  I made a number of them from Rev-Up 13 X 5, 12 x 6, and 11 X 5 props.  Many of the flyers used aluminum plates (washers) on each side of the prop hub.  They were also drilled and tapped for 4-40 flat head bolts threw each blade.  They worked pretty good and you really were bummed when you broke one lol.  I'm sure glad we now have C/F props and about all we to do is repitch them, thanks you prop makers!!

Later,
Mikey

[RandySmith]

The props you pictured  are  definitely  static props, please  do NOT  run the on a motor, those are  not safe

Randy