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Old 06-17-2013, 05:41 PM   #1
kernowman
 
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Default Help needed with indentification of a four blade propeller

Hi,

Hope somebody might be able to help.

I have a four blade wooden propeller that has many years ago been 'modified' to make a clock case. Unfortunately, it now has a badly fitted quartz clock. I am looking to replace the clock with a period movement, but I am stuck for information about the original propeller, particularly the date.

The details marked on it are -
200 HP
WTLO
DG2
The above three marks are stamped individually in the wood between the blades.

On on face it has 736 marked twice, and a small square (about 1/2") with what looks like some figures in it, although this is barely legible.

It has eight holes on a 6.1/8" PCD, taking 7/16" bolts.

It is 4.1/4" thick - unfortunately, the centre hole has been 'hacked out' to take the quartz movement, so the original size is unknown.

Any help would be much appreciated - would love to know what it was originally fitted to, but would think there was only a slim chance of finding this out.

Regards,

Richard
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Old 06-17-2013, 06:03 PM   #2
Dave
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Are those stampings clearly legible, or could they be something else?
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Old 06-17-2013, 06:06 PM   #3
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The stampings are about 1/2" high, very deep and legible, and I would say definitely done when it was made
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Old 06-17-2013, 06:16 PM   #4
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Do the square stampings look like these? Four bladed propellers were mostly manufactured in England, but the stampings don't follow the usual British configuration, which typically included a drawing number, the diameter and the pitch.
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Old 06-17-2013, 06:38 PM   #5
kernowman
 
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I should have updated my profile - I am from the UK. The large square looks very much like the one on mine, but, as I said, anything in it is not legible
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Old 06-27-2013, 05:23 AM   #6
Bob Gardner
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Please add some photographs to this thread showing the complete prop and a close up of the hub markings. And please measure the diameter of the prop from one tip to the other in mm.

With kind regards,

Bob
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Old 06-27-2013, 05:44 AM   #7
kernowman
 
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Bob, one problem that I did not mention earlier is that the blades have been cut off at the hub, so all I have to go on are the markings on the hub, and the holes in the hub. Was hoping the 'WTLO' might have thrown a bit of light on the subject.
Will photograph hopefully tonight and post.
Best regards,
Richard
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Old 06-27-2013, 06:21 AM   #8
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Noting that the thickness of the hub is 4 1/4 inches, I'm wondering what 200 HP engines utilized that sized hub. The OX5 was one engine that did, but it was not 200 HP.
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Old 06-27-2013, 10:43 AM   #9
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Richard,

So far then, it is British and probably dates from WW1. The square AID stamps are airworthiness stamps. The 200hp engine is likely to refer to the Beardmore, Halford and Pullinger engine, often stamped as 200hp BHP, which has confused thousands!

We might be able to decipher more from the photos. Close-ups in focus and of all the lettering please. After twenty-five years of study in this subject I have got squinting down to a fine art!

With kind regards,

Bob
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Old 06-27-2013, 01:54 PM   #10
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Dave/Bob,

Bob, hopefully the photos might help. Let me know if you need any further information.







Dave, there is a possibility that the hub was originally thicker and the front? skimmed off when the clock was made, but I do not know enough about the shape of propeller hubs to to say if this has been done.

Best regards,
Richard
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