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gino 11-17-2013 04:25 PM

Garuda propeller
 
5 Attachment(s)
Hi

I have this Garuda Propeller with following inscriptions:

GARUDA
PROPELLER
D.R.P.
NR 3222

100 PS
MERCEDES. 6 CYL
D 270 BLATTER 025
STG 140

GEPRUFT
FLERS ABT2

STAND
1270

GEPRUFT
P&W



Here my questions:
What is FLERS ABT2 ?
What are the small stamps (cross) on picture 5 ?
Which airplane type ?
Are those metal hub plates original ?

thanks
Best regards
Gino

gino 11-17-2013 04:34 PM

5 Attachment(s)
some more pictures

gino 11-17-2013 04:38 PM

3 Attachment(s)
and more pictures

Dave 11-17-2013 08:06 PM

Nice prop and decals. What is the measured length from tip to tip?

gino 11-18-2013 03:29 AM

Measured lenght is 270 cm.

Gino

Dave 11-18-2013 06:22 AM

1 Attachment(s)
I think maybe you need to remove the metal hub assembly to get a good look at the wooden part of the hub. I'm not sure what's beneath it on this picture.

http://woodenpropeller.com/forumvB/a...1&d=1384773608

Usually the holes in the plate cover wood completely, but you can see a bevel underneath this one, and it looks as if the wood has been painted beneath the holes as well.

It's a very nice looking prop!

Bob Gardner 11-18-2013 08:09 AM

'Morning Gino,

Answers in red. I've translated all the data for the benefit of other forumites.

GARUDA PROPELLER Formed in 1910 in the Neukölln suburb of Berlin
D.R.P. Deutsche Reichspatent. The German system of registering patents in use from 1871 to 1945.
NR 3222 serial number

100 PS MERCEDES. 6 CYL 100hp Mercedes engine. 6 CYL indicates it was made shortly after Mercedes added two more cylinders to its four cylinder 70hp engine.
D 270 Durchmesser - diameter in cm
BLATTER 025 Blattbreite, blade width, a term found on Garuda propellers as in BLATTBR 028 indicating a blade width of 28cms.
STG 140 Steigung pitch

GEPRUFT Found to be airworthy
FLERS ABT2 Flieger Ersatz Abteilung Flyers Replacement Division. Rarely seen. I have only seen this stamp once before, on an early Heine prop. Perhaps this training organisation did its own proofing until superceded by P & W in 1915? (Prüfanstalt und Werft der Fliegertruppe the Test Institute and Hangar (or workshops) of the Flying Troops.) I would welcome some elucidation!

STAND 1270 Abbreviation Standdrehzahl test engine speed. Translates as the Condition Speed, a parameter the propeller had to achieve.

GEPRUFT Found to be airworthy
P&W Prüfanstalt und Werft der Fliegertruppe the Test Institute and Hangar (or workshops) of the Flying Troops. It combined to form the FLZ in 1917 so P & W on a propeller dates it to 1915 to 1917.

Here my questions:
What is FLERS ABT2 ? See above
What are the small stamps (cross) on picture 5 ? I don't know
Which airplane type ? Alb B1, Ru Taube
Are those metal hub plates original ? Probably

With kind regards,

Bob

Bob Gardner 11-18-2013 08:47 AM

Gino,

Last night I finished my book on German makers from Adastra to Garuda. Your photographs came just in time. May I include them in the book?

With kind regards,

Bob

gino 11-18-2013 09:16 AM

Hi
Thanks Bob and Dave for your help.
Of course Bob, you can use those photo's for your book.
If you need some better pictures or different size, let me know and
I ll send them to your personal mail adress.
I am trying to remove the metal hub plates but seems to be not
very easy. I have removed the bolts and the ensemble seems
to be loose now but I not able to split the back plate from the front
plate.Are they screewed or are the pressed together?
best regards
Gino

Bob Gardner 11-18-2013 09:36 AM

Thanks Gino,

Congratulations on finding this wonderful prop.

I would be grateful if you could send me photographs. Do you have my email address? Please send the photographs at about 1mb (or bigger). This will enable me to put large photos in my book.

I advise not doing any more to the hub plate. German ones can be extremely difficult to remove. I know of a marvellous Fok D VII prop except for the hub, where it looks as though someone has used a crowbar or perhaps has hammered steel wedges between the wood and metal. Your prop is better left untouched. And I think the metal hub to be genuine. (If it came off easily it wouldn't be genuine!). I have photographs of similar hub plates, although not exactly so, on Garuda props.

With kind regards,

Bob


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