From my collection The Hon Mr’s Victor Bruce’s Blackburn Bluebird. Photographed at Sealand c1930.

John

I can never look at photos like these without thinking “how many of those poor baskets made it out of there”. I visited Changi Jail a short time ago.

John

Coming back to this one. This (and do I understand others) was found in Croydon. It could be that they were test or development propellers and disposed of through ADC at Croydon where huge numbers of aeroplanes and components from Ex goverment stock were marketed in the early 20’s for next to nothing.

John

A back track on this . The Okapi used a four blade prop so of all the possibles I think that you are looking at an early Horsley as the other contenders used four bladers. The problem is the HP shown as the Condor IA is a nominal 650HP and the Horsley didn’t fly until 1925. The Westland Yeovil and Avro Aldershot are early contenders ,the Aldershot flying in 1922. both used two blade props.

John

I think Low’n’Slow is on the mark. I forgot that many Cirrus engines have right hand rotation. So Avian, Bluebird or Moth perhaps.

John

I think that it has very little Supermarine provenance. It’s certainly an early prop and with the low power slim hub possibly pre first war. Most of the early Supermarine designs favoured
four blade pusher or tractor props. It’s the wrong blade shape for the PB.9 IMO.
The hub markings would solve it.

John