"G0MRL" wrote in message
...
I have a wooden prop, which has been in my family for many years. I know
very little about it. Can anyone help?

It has the following information on it :

Admiralty Design (Transfer)

TREPACO
Trevor Page & Co Ltd (Transfer)
Norwich Eng

The following info is all stamped in the wood.

448 (Suspect this is a serial number)
AD545RH
D2520
P1580
90HPCURTIS

Two stampings which say AOP & ADP (Not very clear)

99.5 inch x 3.75 inch thick, blade approx 9.5inch max width
Central boss 7.75 inch diameter

Weight 20lb

6 holes for bolts, central hole approx 2.625 inch


I'd love to know what aircraft it may be from, and whether the family info
that it dates from the 2nd World War is correct, and what sort of value it
has. It seems to be in pretty good condition.

Thanks in advance.

LB

It is a Curtiss OX-5 (US made) prop. Probably dates from post WWI. D and P
are pitch and diameter in mm. OX-5s were used on Jennys during WWI and any
number of post WWI planes through the '20s into the early 30's. The engines
were 90hp water cooled V-8s and were surplused after the war for next to
nothing. They were not known for reliability but then none of the engines
at the time were known for reliability. They had a unique single pushrod
that operated both the intake and exhaust valves. A number of the engines
are still being flown. Worth a couple of hundred dollars US if in good
condition. They are fairly common. Please don't make a clock out of it.
Keep it original.