Identifying WWI prop - Page 2

AFBreest · 05-26-2015, 10:37 PM

After doing a little follow up research it appears that the Nieuport 16 and Nieuport 17 were both powered by a 110 HP LeRhone engine.

I couldn't find any caudron aircraft powered by a 110 hp engine.

Any chance it came off of an AVRO aircraft like my dad was originally told?

Thanks!

Dbahnson · 05-27-2015, 06:28 AM

Yes, it has unfortunately been sawn in half at some point.

pmdec · 05-27-2015, 07:44 AM

Hi,

Can you post:
- larger and clearer pics of the "flat" sides,
- one of the bottom lamination of the pic which read 110 CLERGET: it seems there is a letter there, just on the left of the saw line.

Regards,
PM

AFBreest · 05-27-2015, 01:54 PM

Hopefully these help!

Front side

AFBreest · 05-27-2015, 02:01 PM

Backside of prop.

AFBreest · 05-27-2015, 02:06 PM

And I see the extra writing. I believe it states:

13
110 CLERGET RH
1576 ( the number 6 could also be a 0, 8, 9)

Bob Gardner · 05-27-2015, 04:00 PM

Hi AF,

The drg number P23 is a drawing number of the British & Colonial Company listed for the Nieuport 17, powered by the 110hp Clerget engine. The prop may have been made for British Nieuports by this company but it might equally have been made by another company using the P23 drawing.

French Nieuports were bought by the British in WW1, and came with engines and props which were then made under licence in GB. So PM is correct that the prop design is French. P23 is the drawing number of the B & C copy. Only a small number of these Nieuports were bought for the RFC. They partially equipped four RFC squadrons.

The diameter of 8' 5" translates as 2570mm. I have recorded one other with a smaller diameter of 2496mm, a difference which is outside the design limits, so the prop may have been used on some other aircraft as well as the Nieuport 17.

With kind regards,

Bob

AFBreest · 05-28-2015, 09:44 PM

Bob and PM,

Thanks for all of the great info on this prop! It's great to have a little more accurate history on it since it's been in our family the last 30 years.

You both mentioned the drawing number on the prop linking it to the Nieurport 17 aircraft. What database are you drawing from to look that information up? Is it online somewhere or in a book I can purchase?

Thanks!

Andrew

Dbahnson · 05-29-2015, 06:24 AM

Quote:

Originally Posted by AFBreest

You both mentioned the drawing number on the prop linking it to the Nieurport 17 aircraft. What database are you drawing from to look that information up? Is it online somewhere or in a book I can purchase?

Sure is. Bob wrote the books listing all the available information on both British and German propellers.

You won't find a more comprehensive source anywhere in the world.

pmdec · 05-30-2015, 07:24 PM

Hi,

If the prop has been made by Régy, it would have a "stamp" on the blades (each side of the hub) like those:

They read: "Les Fils de Régy Frères" (The Sons of Régy Brothers) and "HÉLICES RF" (RF PROPELLERS).

They could be very faint.

If they are not there, it would say, IMHO, that the prop has been made by a licensee in France or in England.
Bob could have more info: why there are no batch and prop numbers (if made in England) and why measurements are feet and inches (it seems to me that in the WW1 era, English props measurements were ine millimeters). It could be because it was made in France (and French prop makers thinking about feet and inches easier or mandatory in England?).

Regards,
PM

05-26-2015, 10:37 PM	#11
AFBreest Forum Contributor Join Date: May 2015 Posts: 15	After doing a little follow up research it appears that the Nieuport 16 and Nieuport 17 were both powered by a 110 HP LeRhone engine. I couldn't find any caudron aircraft powered by a 110 hp engine. Any chance it came off of an AVRO aircraft like my dad was originally told? Thanks! __________________ - Andrew

05-27-2015, 04:00 PM	#17
Bob Gardner Moderator Join Date: Jan 2006 Location: The North of England Posts: 1,734	Hi AF, The drg number P23 is a drawing number of the British & Colonial Company listed for the Nieuport 17, powered by the 110hp Clerget engine. The prop may have been made for British Nieuports by this company but it might equally have been made by another company using the P23 drawing. French Nieuports were bought by the British in WW1, and came with engines and props which were then made under licence in GB. So PM is correct that the prop design is French. P23 is the drawing number of the B & C copy. Only a small number of these Nieuports were bought for the RFC. They partially equipped four RFC squadrons. The diameter of 8' 5" translates as 2570mm. I have recorded one other with a smaller diameter of 2496mm, a difference which is outside the design limits, so the prop may have been used on some other aircraft as well as the Nieuport 17. With kind regards, Bob __________________ Bob Gardner Author; WW1 British Propellers, WWI German Propellers http://www.aeroclocks.com

05-28-2015, 09:44 PM	#18
AFBreest Forum Contributor Join Date: May 2015 Posts: 15	Bob and PM, Thanks for all of the great info on this prop! It's great to have a little more accurate history on it since it's been in our family the last 30 years. You both mentioned the drawing number on the prop linking it to the Nieurport 17 aircraft. What database are you drawing from to look that information up? Is it online somewhere or in a book I can purchase? Thanks! Andrew __________________ - Andrew

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05-27-2015, 06:28 AM	#12
Dbahnson Administrator Site Admin Join Date: Nov 2008 Posts: 1,048	Yes, it has unfortunately been sawn in half at some point.

05-27-2015, 07:44 AM	#13
pmdec Forum Contributor Join Date: Nov 2006 Location: France Posts: 543	Hi, Can you post: - larger and clearer pics of the "flat" sides, - one of the bottom lamination of the pic which read 110 CLERGET: it seems there is a letter there, just on the left of the saw line. Regards, PM

05-30-2015, 07:24 PM	#20
pmdec Forum Contributor Join Date: Nov 2006 Location: France Posts: 543	Hi, If the prop has been made by Régy, it would have a "stamp" on the blades (each side of the hub) like those: They read: "Les Fils de Régy Frères" (The Sons of Régy Brothers) and "HÉLICES RF" (RF PROPELLERS). They could be very faint. If they are not there, it would say, IMHO, that the prop has been made by a licensee in France or in England. Bob could have more info: why there are no batch and prop numbers (if made in England) and why measurements are feet and inches (it seems to me that in the WW1 era, English props measurements were ine millimeters). It could be because it was made in France (and French prop makers thinking about feet and inches easier or mandatory in England?). Regards, PM