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Old 09-07-2008, 12:04 PM   #11
Bob Gardner
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I have found out a little more but not much. The Avro Anson and Airspeed Oxford both used the PW Wasp Junior. Two thousand Ansons were built in Canada with this engine. But I think the props for these would have been a different shape from a Watts prop, having been made locally in Canada.

The diameter of 7.25ft is close to the diameter of the Watts prop fitted to the Cheetah engine in the Anson and Oxford, which used fixed pitch props.

My guess is that yours is one of a limited run of props made by Watts for the Wasp Junior engine which might have turned up in Britain on the occasional ac requisioned by the RAF such as a Staggerwing, A17, Beechcraft Expeditor, Goose and Lockheed 10 and 12A's or for Canadian Ansons and Oxfords, if any of those got to Britain.
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Old 09-10-2008, 05:02 PM   #12
tnowak
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Hi Bob,

I am still trying to figure out which airframe this prop may have been for. Can you by any chance tell from the Dwg No. or any other info I provided the approximate year the prop would have been manufactured?

You mentioned "mid 1930s" a few posts back when they stopped stamping info on the hub. Does that suggest this prop was manufactured pre 1930s?

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Tony
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Old 09-11-2008, 05:45 AM   #13
Bob Gardner
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Good Morning Tony,

I can't offer much more help. My intuitive feel is that the prop dates from WW2. It's a British prop. British aircraft with a Wasp Junior engine are rare. If Watts drg nos are sequential (they do seem to be) your prop was designed around 1939-40 and probably the design remained in use throughout the war. Those last three digits (777) might possibly be a date of manufacture and if so would be written in the format, for example, 7.42 or 7/42 indicating July 1942.

I suggest that some hours googling might produce a result (it often doesn't). It might produce RAF aircraft which used the P&W Wasp Junior engine. It might find a photo of such an aircraft on the ground where you can compare your prop with the prop on the aircraft. This probably won't give a definitive answer but might give you a shortlist of possibilities.

If you discover anything, please let us know on this forum.

With regards,

Bob
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Old 09-22-2008, 09:29 AM   #14
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Hi Bob,

Well, have spent a good few hours Googling and think I have identified the likely airframe - an Airspeed Oxford.
As far as I can tell this was the only British twin engined aircraft of that era to be fitted with fixed pitch props and later re-engined with P&W Wasps. The only photos I have been able to find aren't conclusive as, although the prop looks similar (side on view only), I can't be 100% sure if the pic shows a Wasp or Cheetah engined aircraft.
All other likely candidate airframes (US and UK) fitted with the Wasp engine always have VP or CS props. The Wasp is a powerful engine so it seems (to me anyway) quite unusual to find a fixed pitch wooden prop for the engine.
Perhaps it is a "maintenance" spare or similar to "get me home"?
Regards

Tony
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