Lang Prop of America - Plane ID Help Needed

[Toxo]

Experts,

I am looking for help to identify a propeller I have and to which plane it was originally designed for. I received this propeller from my Father-in-Law who has had it for at least 3 decades. I don't know how he came to posses the propeller but I know he never did identify the airplane it would have been used on.

Looking at the prop, it's clear that it never was used. The hub doesn't have holes for the bolts to attach to the plane/engine so I assume this particular propeller failed inspection for one reason or another or maybe it was just extra stock.

I have taken several pictures of the decal, Hub Markings and 16:9 end-to-end picture.

If anyone is able to assist me in this search it would make an old man very happy. My plan is to order a large print of the airplane and frame it and put up next to the propeller. I'm hoping to present this framed picture as a Christmas present this year.

Thank You in Advance!

Tox

[Dbahnson]

I think the 101 model number is consistent with the 100 HP Gnome engine, but I don't know for which aircraft. (That's based on a publication I have that the 101-B model was designed for that engine.)

I think your assumption that it was rejected is probably correct. The "SC" indicates a Signal Corps number and the inspection stamp below that is typical of the Air Service. The fact that diameter is in metric units suggests that it may have been manufactured in the U.S. for a British built aircraft being used by the Air Service in the U.S., but that's just my wild guess.

If you can find a propeller listing for 101 A, I think that would be your best match. My best guess is that it was for a Thomas Morse Scout, similar to this propeller but the Scout was also flown with a 100 Gnome engine. Both engines used an 8'2" prop. At first glance your's looks like it's stamped 2.40 meters, but it would be unusual to have two zeros in that sequence, so I suspect the stamp is actually 2.499 m, which does correspond to 8'2".