12'4" wooden prop

[synergy]

Suspended on ceiling and unable to see any stamps, nos, ect on reverse side.
Uncut with blades covered with a protective black linen type material.
Maybe unused and originally thought to be a Watts make.
Too long for Spit/Hurri/Fury and has low speed tips.
Poss. seaplane but...…….any body go any further ?

[Dbahnson]

There's not too much to go on. At that size it might be for an airship of some kind, and note that it's a left hand thread, which can indicate a pusher configuration.

[Bob Gardner]

Hello Synergy!

Your prop is British and probably dates from late WW1 or the 1920's. Can you tell us how long it is? I might then be able to identify it. It has none of the characteristics of a Watts prop, nor is it from a seaplane. It is probably covered in Irish Linen painted black, which is characteristic of RAF props from 1918 until circa the mid 1930s when a Hydulignum finish came into use. This was a process devised in Germany in the 1930s and made under licence in GB. It is described elsewhere on this forum. The process used many thin laminations glued together, a process today called laminates, and the laminates were put into a sheath before the whole prop was immersed in liquid resin at a high temperature.

With kind regards,

Bob

[Dbahnson]

In the thread title it’s 12 feet, 4 inches. Note the 10 bolt hole hub and the left hand thread.

[synergy]

Old 12'4" propellor

I will get back on here when the prop is on the floor and I can read the other side of the boss

[dairwin]

Suspended on ceiling and unable to see any stamps, nos, ect on reverse side.
Uncut with blades covered with a protective black linen type material.
Maybe unused and originally thought to be a Watts make.
Too long for Spit/Hurri/Fury and has low speed tips.
Poss. seaplane but...…….any body go any further ?

Wrong rotation for a Merlin, and the Spit/Hurricane used a 12 bolt Watts hub.

[synergy]

It is a Watts propellor

Got off the ceiling:

DRG No WATTS Z1651/1.....TIGER 1V

REVERSE SIDE OF BOSS: 34792....B7014.....DEC/34....D12-25'....P 9 5'...

[dairwin]

Blackburn Shark, Armstrong Siddeley Tiger IV radial engine.

[synergy]

Thank you....any idea of value.....It is possible this prop was never used....no wear marks or fatigue showing......Pete

[dairwin]

Thank you....any idea of value.....It is possible this prop was never used....no wear marks or fatigue showing......Pete

I wouldn't really know, but everything has a value to a collector. There won't be many surviving, but there probably isn't any demand either. I am not aware of any museum examples of the Shark.

However it is a Watts propeller, designed by the great British airscrew designer Dr HC Watts.