Is this a WW1 propeller please?

[jennie]

Hi this is my first thread. I have rescued a propeller that a neighbour was throwing in the skip. It belonged to his father who was in the RAF during the war. The markings on the hub are as follows.
L AB 7931 RH D 2900
EXP . DE H4 P 2380
200 BHP G 200 N78
G 200 N78
Please does anyone recognise these? The propeller has part of one side missing.

[Dave]

It's likely WW1 era or very shortly after.

L AB 7931 - Drawing number ("AB"= "Air Board")
RH "Right Hand" - direction of rotation
D 2900 - diameter in mm
P 2380 - pitch in mm

EXP . DE H4 probably "experimental", DeHavilland 4 (DH4)

200 BHP - horsepower

G 200 N78 - production number


The reference I have lists that model for use on the Bristol Fighter or the DH9, not 4, so it's possible that the "EXP" goes with using it on the DH4.

[jennie]

Thanks Dave

The EXP. (with L over the . ) is inscribed on the underside of a blade away from the other inscriptions and has a 1cm square with what looks like AFO OOB inscribed.

[Dave]

The EXP. (with L over the . ) is inscribed on the underside of a blade away from the other inscriptions and has a 1cm square with what looks like AFO OOB inscribed.

Might be time for a photo . . .

Some of those letters fit into logical sequences, so when something "looks like" such and such it's time to look at the actual stampings.

[jennie]

Re photo

Will add photo as soon as possible when my son returns my camera. jennie