Wooden Propeller Forum  

Go Back   Wooden Propeller Forum > Wooden Propeller Identification > "Modern" Wooden Propellers

Reply
 
Thread Tools Display Modes
Old 06-03-2018, 11:38 PM   #11
dairwin
 
Join Date: Jan 2011
Location: Kirdford, West Sussex.
Posts: 26
Default

Quote:
Originally Posted by n99jh View Post
Hi Dairwin

Thank you so very much for your help. The 330 cm diameter converts well to an approximately 10' 6" diameter propeller, however, I doubt that the other number is the pitch, that would mean 11' pitch !?
The Hurricane Watts propeller has a 11.25' diameter and pitch of 21.3' (see photo). So don't dismiss the pitch; these are very pitchy propellers optimised for high speed only.

DAI
Attached Images
File Type: jpg P1030692 copy.jpg (71.6 KB, 4 views)
dairwin is offline   Reply With Quote
Old 06-07-2018, 06:26 AM   #12
n99jh
 
Join Date: Jun 2018
Posts: 4
Default

Quote:
Originally Posted by dairwin View Post
The Hurricane Watts propeller has a 11.25' diameter and pitch of 21.3' (see photo). So don't dismiss the pitch; these are very pitchy propellers optimised for high speed only.

DAI
I have done some more research and found that the Hawker Hector which used the same Napier Dagger engine as used on the MB.2 had a Watts Z.3040 propeller, 10.9' dia. and 12.15' pitch. This may very well be the same propeller as the one loaned to Sir James Martin.
You are correct about the pitch!
n99jh is offline   Reply With Quote
Old 06-07-2018, 06:44 AM   #13
dairwin
 
Join Date: Jan 2011
Location: Kirdford, West Sussex.
Posts: 26
Default

Quote:
Originally Posted by n99jh View Post
I have done some more research and found that the Hawker Hector which used the same Napier Dagger engine as used on the MB.2 had a Watts Z.3040 propeller, 10.9' dia. and 12.15' pitch. This may very well be the same propeller as the one loaned to Sir James Martin.
You are correct about the pitch!

For the Z.38 Hurricane propeller, the Rolls-Merlin II could only develop approx 2,100rpm at take off. The equivalent Watts used on the early Spitfire Mk1 had a take off length of 450 years, but when changed to the two-position deHavilland propeller the take off run reduced to 230 yards as that propeller was optimised with fine pitch.

The photo is my Merlin II with a Z.38 propeller. The pitch is evident!

DAI
Attached Images
File Type: jpg P1040886 copy.jpg (94.8 KB, 4 views)
dairwin is offline   Reply With Quote
Old 06-26-2018, 08:12 AM   #14
dairwin
 
Join Date: Jan 2011
Location: Kirdford, West Sussex.
Posts: 26
Default

Quote:
Originally Posted by n99jh View Post
I am back at it

Would really appreciate any information regarding the pitch of this propeller.

Thanks

Joshua
Joshua,

Came across another photo of a Watts for a Kestrel V.

DAI
Attached Images
File Type: jpg P1040083.jpg (87.0 KB, 3 views)
dairwin is offline   Reply With Quote
Old 06-26-2018, 06:19 PM   #15
n99jh
 
Join Date: Jun 2018
Posts: 4
Default

Quote:
Originally Posted by dairwin View Post
Joshua,

Came across another photo of a Watts for a Kestrel V.

DAI
Thank you very much, your help is much appreciated.
n99jh is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 03:08 PM.


Powered by vBulletin® Version 3.8.9 Beta 3
Copyright ©2000 - 2018, vBulletin Solutions, Inc.