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Old 11-29-2011, 03:36 PM   #11
pmdec
 
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Hi Dave,
Quote:
Originally Posted by Dave View Post
This is a good example of how altering the light source can sometimes be used to better determine the stampings.
.../...
Also of some interest is the still partially visible notation at the base of the decal, which I presume to have read "marque déposée"..../...
Yes, different light sources and different view angles is often the only way to read the markings.
About "Marque déposée", you are right: it is exactly what is on commercial Ratmanoff papers.
Also, at the blades feet, you may have a stamp, on the intrados side.

Sure you may use the data I posted. I sent you a PM.

Regards,
PM
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Old 11-29-2011, 06:47 PM   #12
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Here is the preliminary revision for the page showing the Normale propeller. Any suggestions for improvement or clarification is welcome . . .
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Old 01-23-2012, 02:15 PM   #13
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Default Anzani Helice Normale

Can you show a photo or describe the prop hub dimensions?

For example: dia main bore/front to back thickness of hub/dia of bolt circle.

Any idea what the propeller pitch is, or the type of wood?

Thanks.

-pete
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Old 01-23-2012, 02:31 PM   #14
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Quote:
Originally Posted by drrivah View Post
Can you show a photo or describe the prop hub dimensions?

For example: dia main bore/front to back thickness of hub/dia of bolt circle.

Any idea what the propeller pitch is, or the type of wood?

Thanks.

-pete
I'll try to get measurements later today. I don't know what type of wood it is. Perhaps walnut (based on the appearance of the grain, primarily) with a more amber shellac but I can't be sure. The pitch is not stamped on it.
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Old 01-23-2012, 02:43 PM   #15
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Default Prop

I believe "PAS" is the French for pitch (of a screw). Should be about half the diameter.

Thanks.

-pete
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Old 01-23-2012, 03:55 PM   #16
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It's just not stamped on this particular propeller. I believe it can be calculated based on the angle of the blade at various distances from the hub, but I'm not sure the technique for doing it, and I think it's a trigonometric function.
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Old 01-24-2012, 06:25 AM   #17
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I have only just read this thread; and I have read it from beginning to end with mounting admiration. It is a perfect example of how successful this website is. Thank you Dave and Lamar for setting it up.

Bob
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Old 01-24-2012, 02:49 PM   #18
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Default Anzani W hub dimensions

Hi Folks:

Here is a rough draft of an Anzani W (~25-30 hp) hub plate superimposed on a wooden hub. Been interested in props and relative performance for a replica Anzani engine (1:1).

Bleriot reports after flying the English Channel his Anzani W ran at 1200 rpm, although others report 1200-1600 rpm for this engine. A/C performs well with
a C65 engine as well with scaled down prop.

Can't quite discern the prop type mounted on the original Bleriot XI/Anzani W in Paris. However, from this forum, sounds like Ebora, Chauviere (IPC) and Ratmanoff Helice Normale were used on Bleriot XI at varous dates.

The cover photo newpaper report on the Channel crossing from the English newspaper "Daily Graphic" July 26, 1909, looks most like a Chauviere. The original flew only once with prop broken on landing in England.

Would greatly appreciate measurements on Ebora, Chauviere and Ratmanoff hubs in millimeters for the following (see diagram):

D1=diameter of shaft opening; R1=outer radius from dead center to outermost rim of bolt hole (maybe easier to measure rim of central to outer rim of bolt hole); and R2=inner radius of bolt hole ( dead center to rim or rim to rim if easier, in mm).

Finally, outer and inner diameter between bolt holes.

More later on prop diameters and pitch, and substitute engines for the Bleriot XI.

Thanks, all.

-pete

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Old 01-24-2012, 04:20 PM   #19
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Quote:
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Thank you Dave and Lamar for setting it up.
Thank you for your kind words Bob but I deserve zero credit. Dave's "the man".

Lamar
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Old 01-24-2012, 04:34 PM   #20
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Hi,
Quote:
Originally Posted by drrivah View Post
Hi Folks:

Here is a rough draft of an Anzani W (~25-30 hp) hub plate superimposed on a wooden hub. .../... .
All credible historical pictures of THE Blériot XI (the one which crossed the Channel first) show an 8 bolts Chauvière prop fitted to a semi radial 3 cylinders Anzani engine.

PM

Remark : This engine is not a "W" engine, which is something very different. The French word for this kind of engine is "en éventail" (literaly, hand fan shaped).

Last edited by pmdec; 01-24-2012 at 05:42 PM. Reason: less confusing text
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