Propeller Hub for WWI 80 HP Le Rhone Rotary Motor

 Back in January 2013 I wrote about de-rusting a propeller hub and then discovering it was a metric hub.  I've just learned that this hub fits an engine from earlier in the First World War.  It's for an 80 HP Le Rhone rotary motor.  It does not fit the larger motors like the 110 HP version.  It may fit the 60 HP version but I have not found data for the hub on it and they only made a few hundred of them.

 The first piece of data was from The Handbook of Instructions for Airplane Designers, second edition, February, 1921.  This book was produced by the Engineering Division of the Air Service.  The focus is on the dimensions which are relevant to making the propeller.  The dimensions are:

A - Hub Shaft O.D. 60 mm (2.362")
C - Prop. Bolt Centerline Diameter 120 mm (4.724")
D - Hub Flange O.D. 150 mm (5.905")
E - Number of Bolts - 8
F - Dia. of Bolts - 10 mm (0.394")

On-line I found some drawings which show the dimensions related to attaching the hub to the shaft.

The shaft is 42 mm O.D. at the nut end of the shaft.
The taper increases the diameter as a 10% cone.
The threaded end of the shaft (where the retaining nut screws on)
    is threaded for 18 mm.
The thread has on O.D. of 40 mm and a pitch of 1.50 mm.

All of which says this hub works on an 80 HP Le Rhone.  With magnetic inspection for cracks and fresh nickle plating it would be ready for use.

Anyone need a prop hub for their project?
Some of the planes which used the 80 HP Le Rhone either as the primary or alternate motor were:

1913 - Morane-Saulier L
1913 - Morane-Saulier N
1914 - Nieuport 10
1915 - Nieuport 11 (Bebe)
1916 - Nieuport 21 (as trainers)
1914 - Bristol Scout C
1915 - Bristol Scout D
1915 - SPAD A-2
1916 - Sopwith Pup
1916 - Vickers F.B.12
1917 - Thomas-Morse S4c

Old Metric Propeller Hub For Wood Propeller

 With the OX-5 Engines were 2 propeller hubs for wooden propellers.  This one is complete except for needing to be re-plated with Nickle plating.  It is also in serviceable condition. It was completely orange with rust when I stared.  It cleaned up nicely in the Electrolytic de-rusting bucket. It's the rusty one at the top.

The more amazing thing, when I started measuring it, was it's Metric not English.  It fits a tapered shaft with a 10 mm key.  There are 2 sets of 8 bolt holes for 10 mm bolts.  The inner set is 110 mm on centers and the outer is 120 mm on centers.  The propeller would have been 90 mm thick with a 60 mm hole. The outside diameter of the hub and of the plate is 150 mm.

 The front plate is splined to the hub with 4 10 mm splines.  Modern (1930's +) light plane hubs do not attach the front plate to the hub. The hub is held to the shaft with a nut which is threaded to the hub and to the shaft.  This nut is held in place with a clip which is locked by safety wire around it in the gap between the hub and nut.

The nut outside, hub to nut, thread is 50 mm diameter with 1.25 mm pitch threads.

The nut inside, shaft to nut, thread is 40 mm diameter with 1.25 mm pitch threads.

There are areas which either still have plating or the plating was still protecting the base metal before derusting.

The back of the hub is stamped with a (part number ?) 150 and below it, around the flange to the bottom, with the symbol for Omega.  There is also what appears to be a QC acceptance stamp near one of the inner bolt holes.  The front plate is stamped the same but the number is 151.

The million dollar question is what engine does this fit?  Any help out there?