Posted: 10/29/2009 12:15:02
A fellow Chapter 93 member is looking for some identification help for this prop. It was given to him by his uncle, but unfortunately has had the blades cut off about 1 foot from the center of the hub. It has the markings "U S Propellers Inc" on one side and the opposite side is marked "DES 44K7797" and "SERAF4310060". A number on the hub side is "10060".
It's curious that this prop had only 4 bolt holes which appear, not surprisingly, to be somewhat elongated and the prop looks to have some friction charring under the crush plate and hub.
Posted: 10/29/2009 22:56:59
This looks very much like a drone prop. Probably mounted on a Nelson or McCullough 2 stroke engine. They turned pretty high RPM therefore used small diameter high pitch wood props.
The number SERAF4310060 is a typical Air Force number indicating:
The 44K7797 may be the diameter and pitch info. Ie. 44" dia and 77" pitch at tip and 97" pitch at root.
This is all is an educated guess, but I think it's on the right track.
Posted: 11/1/2009 13:51:41
John, I too think you are right... Love your picture of the Spartan Executive. I used to work on them at the Spartan School of Aeronautics in Tulsa Ok. I was a student there, advanced students were allowed to work on live aircraft. I recall a model 7W? Years later . I regrett that I did not purchase an Executive that was for sale in Denver Co. It had a stick instead of a wheel. I recall that the owner had an aircraft seat company. What an airplane, years ahead of its time.