Wooden Propeller Forum  

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

Reply
 
Thread Tools Display Modes
Old 05-30-2014, 10:09 AM   #1
tramp
 
Join Date: May 2014
Posts: 3
Default Trying to identify a wooden propeller

Hi there,
I am trying to identify this wooden propeller. I used the chart provided and the measurements most closely line up with it having been used on a BMW engine. The only large discrepancy is the hub thickness. This propeller's hub thickness measures 4 5/8s inches.
There is no stamping on the prop and the blades were cut down. The overall length of the item is 36 inches.
I understand that without stamping, identification is very difficult...but would anyone be able to provide any additional help?

Many thanks,
Jonathan
Attached Images
File Type: jpg 20140529_181900.jpg (108.8 KB, 14 views)
tramp is offline   Reply With Quote
Old 05-30-2014, 04:55 PM   #2
Dave
Moderator
 
Join Date: Jan 2006
Location: Vermont
Posts: 2,831
Default

Not much help, but I notice that it is a left hand thread, which is less common than right hand and sometimes (but not always) indicates a pusher application.

Even a "small discrepancy" in bolt circle diameter, center bore, or bolt hole size is probably enough to eliminate a specific engine. Hub thickness can vary a little bit due to normal expansion or shrinkage of wood with moisture, but the other measurements not so much.
__________________
Dave
Dave is offline   Reply With Quote
Old 06-11-2014, 01:52 PM   #3
tramp
 
Join Date: May 2014
Posts: 3
Default

Thanks for the reply, Dave.
I will post the measurements and perhaps that will help.
Thanks again,
Jonathan
tramp is offline   Reply With Quote
Old 06-11-2014, 07:15 PM   #4
Dave
Moderator
 
Join Date: Jan 2006
Location: Vermont
Posts: 2,831
Default

Try to measure the "bolt hole circle" as accurately as possible. It's the diameter of the circle on which all of the CENTERS of the bolt holes rest and can be determined by measuring from one edge of a bolt hole, across the middle of the hub, to the corresponding edge of the exact opposite bolt hole. The discrepancy from the actual centers will cancel out using that method.
__________________
Dave
Dave is offline   Reply With Quote
Old 02-09-2017, 08:56 AM   #5
tramp
 
Join Date: May 2014
Posts: 3
Default

I checked the bolt hole circle and it measures at 6 3/4". If that's helpful...
tramp 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 07:56 AM.


Powered by vBulletin® Version 3.8.9 Beta 3
Copyright ©2000 - 2017, vBulletin Solutions, Inc.