PROP IDENTIFICATION DESIRED

[Pubsman]

I have an approx 6' wooden prop I inherited from my Father (who inherited it from a family relation somehere in the South of England). The details stamped on the Boss are as follows:

WATTS 400
D. 1900 . P. 1290.
CHERUB 2-1
4.24.

There is also a symbol showing a three-square "pyramid" shape. Inside the top square is a smaller square with a large numeral 2 inside. The bottom 2 squares have large "D" shapes in them with a large dot in the left one and another large numeral 2 in the right one.
If needs be I'll try and post a photograph if anyone wishes.

Thanks in advance.

[Bob Gardner]

Greetings,

Your prop is from the late 1920's and is from a Hawker Cygnet powered by the Bristol Cherub engine.

D and P indicate the diameter and pitch in mm.

With regards,

Bob

[Pubsman]

Hi Bob,

Thanks for the info.

Any clue as to what the symbols I described mean?

Thanks

[chiltonman]

Hi Pubsman

This prop is probably from a Cherub but not from a Cygnet as that had a direct drive Cherub with typically a prop of not much more than four feet in diameter. Can you let me have the diameter that the prop bolts are drilled on also the actual dia of the bolt hole.

Thanks
Roy

[Pubsman]

PROP IDENTIFICATION DESIRED

Hi Roy,

Thanks for that info. I'm currently reading your reply on holiday in Malta. I'll post the measurements when I return home next week. Any clues as to what the symbols mean? I'll post a picture if useful.

Thanks,

Ian

[Bob Gardner]

I think a photo of the prop and of the markings would be most interesting. I suspect they are air worthiness markings (AID) but I would like to see them.

The only Bristol Cherub engine listed in my prop data base is the Mk III fitted to the Hawker Cygnet with the Watts drg no. of 444, so an identification of this prop (Watts 400) by Roy would be most welcome.

I have looked up the Bristol Cherub, an engine I knew nothing about, to discover that it was tiny and produced around 34hp. I shall be interested to discover in what circumstance it drove a six foot prop.

Regards,

Bob

[Pubsman]

Bob/Roy,

There are 6 holes of approximately 9mm (3/8 in.) in diameter. "Pairs" of holes are 10cm (3 15/16 in.) apart across the diameter.

Some pictures of the details are at:

http://i226.photobucket.com/albums/d...010661copy.jpg

http://i226.photobucket.com/albums/d...010658copy.jpg

http://i226.photobucket.com/albums/d...010645copy.jpg

http://i226.photobucket.com/albums/d...010644copy.jpg

Hope the above helps. If you need any further info, just ask.

Thanks,

Ian