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Old 12-19-2011, 12:50 PM   #1
gino
 
Join Date: Nov 2010
Posts: 64
Default 200 hp siddeley propeller identification

Hello
I recently bought an other propeller to expand my collection.
Unfortunately the propeller was hanging outside on a hanger when I bought
it in France, near to Charleville. Because of this, the canvas got damaged quite badly. However the wood is not that bad and inscriptions easy to read.
Here some details:

9 bolt holes

front : G 1329
N 14
SIDE: B 7935 RH
200 HP
SIDDELEY

OTHER SIDE: DIA 2900
P 2320
BACK: 2815

4 small AID stamps with number 5

The inscriptions on the hub side are all vertically.

Does somebody know what date this propeller is listed and who build the
propeller? Is this a possible DH9 or Bristol propeller?

I see that often shellac is recommended to seal the wood before applying
beeswax but wondering if their is an other recommended sealing product
which may be used safely i.s.o shellac?

Does anybody has an idea how to glue the loose canvas parts back to the
propeller?
Looks like the canvas was initially dark green coloured. Is this normal?

Thank
Gino
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Last edited by gino; 12-19-2011 at 02:08 PM.
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Old 12-19-2011, 09:53 PM   #2
pmdec
 
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Hi,

Think it is the one of the picture below. It has been oiled or varnished from the days it was hanging outside... So, it is too late using shellac.

Bob Gardner will tell you a date from the G batch number and some destination (engine/aircraft) from the B7935 drawing number.

Regards,
PM
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Old 12-20-2011, 03:41 AM   #3
gino
 
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Hi

Thats the one. Somebody also painted the prop tips red.
Doesn't look it was oiled or varnished. On my pictures the wood looks
dark but this is because I took the pictures when the wood was still wet after cleaning.
I will remove the red paint and try to preserve the propeller.

best regards

Last edited by gino; 12-20-2011 at 08:26 AM.
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Old 12-20-2011, 07:20 AM   #4
pmdec
 
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Hi,
Wet! I didn't think to this option... Good news!
Think you are right about removing the red paint.
Regards, and best wishes for your preservation work,
PM
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Old 12-20-2011, 08:32 AM   #5
gino
 
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Hi

What kind of products do you use in France to seal the wood. Anything alse
except of shellac?


best regards
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Old 12-20-2011, 06:20 PM   #6
pmdec
 
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Hi Gino,

To my knowledge, shellac is the best, and used by museum. One day, I thank about polyvinyl alcohol (used as mold release: see http://en.wikipedia.org/wiki/Polyvinyl_alcohol ), but I never tried it. In fact, except a light wash, insecticide and picking up loose fabric or small parts of wood, we do nothing to our props! We consider them as evidence of an industry and not as decorative objects (but they ARE décorative!!!).

Regards,
PM
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Old 12-21-2011, 05:23 AM   #7
Bob Gardner
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Greetings Everyone,

Complements of the Season.

The data on the hub translates as follows;

AB7935 the Air Board Drawing number for a prop used on the Bristol Fighter (the Bristol F2B) and the AIRCO DH9.
G1329 N14 The fourteenth prop of the one hundred made in production batch 1329, which can be dated approximately to mid 1919.
200 hp Siddeley. The BHP engine modified and made by Siddeley.
D2900 the diameter in mm
P2320 the pitch in mm

Note that this was a standard prop, which means it was judged by competition to be amongst the best, for the F2B and DH9 from July 1919 onwards. However it was listed with a pitch of 2380mm. But several examples exist with a pitch like this one of 2320mm so there was some reason in operational use for this preference.


With kind regards,

Bob
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Last edited by Bob Gardner; 12-21-2011 at 09:50 AM.
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Old 12-21-2011, 06:49 PM   #8
gino
 
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Hi Bob
Thanks for the information.
Do you also have an idea which company made this propeller and
do you have more info on the AID stamps with nr 5 in it.

Best regards
and merry x-mass to all viewers.
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