Identifying propeller Bristol Jupiter

[vanbeekzwart]

Hi all,

I am new on the forum, and i just accuired a wooden propeller.
I live in the Netherlands, so the might be some errors in my writing!
On top of the propeller hub there are a few identification marks.
The marks that i could not read are marked with a dot.

Bristol
Jupiter
B . . . . P3156
D25 . 0 P2620
Left Hand

On the bottom of the hub there are the folowing marks.

15275
10-11-22

I think that it was made 10-11-22
The propeller hub has 20 holes and there are no metal protection strips on the propeller ends.
The propeller was a gift from Anthony Fokker to an theatre in Amsterdam where they use to hold meetings and briefings.

I hope someone can help me identify this propeller

I will send a picture later.

[Dave]

The Bristol Jupiter was an engine developed around that time, but that was also late in the War and propellers for it might not have been included on some of the lists that included WW1 aircraft. Some aircraft are mentioned on the link above.

Bob Gardner may have some more specific information about the engine and perhaps be able to narrow down the numbers, but a photograph including close ups of the stampings would be the next step.

Note the photo of the hub showing 10 "pairs" of holes, consistent with what you describe about 20 bolt holes.

If you can carefully measure the length from tip to tip in millimeters, that information might help fill in some of the numbers that you can't determine.

[vanbeekzwart]

additional info

Dave,

The lenght of the propeller is 290 cm (2900 mm) or 114.2"
I did some research myself, and it is possible that it might be an propeller from a Fokker F-VIIA.

Regards, and thanks

Bas

[Dave]

It certainly looks like that's one of the possibilities.

With a measured diameter of 2900 mm, you would expect the "D" number to be "D 2900". (The "P" number is the pitch in mm.)

[vanbeekzwart]

Pictures

Dave,

I attached the pictures.

Bas

[Bob Gardner]

Baz,

I can't offer any help, I'm afraid. Your guess about the Fokker connection seems eminently likely. Congratulations on owning a prop with a connection to Anthony Fokker.

With kind regards,

Bob

[vanbeekzwart]

Bob,

Thank you for your reply.
I am verry happy with this propeller.
Its my second prop.
I also own a Hamilton Standard propeller from an Beech Staggerwing.

I found out that i have an other connection with Anthony Fokker.
My grandfathers father (sgt du Pree) invented the synchronised machine gun together with warrant officer Boevink.
The Dutch air force didnt liked the idea, and gave the patent to Anthony Fokker.
We all know what happened with this invention!!

regards, Bas