How are 4-bladed props made?

01-08-2008, 09:11 PM

I'm curious about the construction of 4-bladed propellers. It is essentially two regular propellers that are "notched" and fitted together. Or are alternating laminations laid down in the two directions, or what?

MWP_Lamar · 01-09-2008, 10:30 AM

Of the ones I've seen they are made from two props that are notched.

Lamar

Dave · 01-09-2008, 02:27 PM

Some were made with overlaping joints so it was a true 4 blade. I think I have some drawings of the process from Paragon. I'll see if I can dig them out.

Dave · 01-09-2008, 06:37 PM

Here's a page from a 1920 Paragon brochure showing the construction of a 3 bladed prop at the hub:

01-10-2008, 02:00 PM

Very interesting! That would certainly test the skills of any woodworker!

I suppose I was primarily wondering about the techniques used on earlier WWI era 4-blades props such as the ones used on the RE8s and DH4s, as well as some variants of the SE5a.

01-08-2008, 09:11 PM	#1
abufletcher Guest Posts: n/a	How are 4-bladed props made? I'm curious about the construction of 4-bladed propellers. It is essentially two regular propellers that are "notched" and fitted together. Or are alternating laminations laid down in the two directions, or what?

01-09-2008, 02:27 PM	#3
Dave Moderator Join Date: Jan 2006 Location: Vermont Posts: 2,832	Some were made with overlaping joints so it was a true 4 blade. I think I have some drawings of the process from Paragon. I'll see if I can dig them out. __________________ Dave

01-09-2008, 06:37 PM	#4
Dave Moderator Join Date: Jan 2006 Location: Vermont Posts: 2,832	Here's a page from a 1920 Paragon brochure showing the construction of a 3 bladed prop at the hub: __________________ Dave

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01-09-2008, 10:30 AM	#2
MWP_Lamar Moderator Join Date: Jan 2006 Location: Louisiana Posts: 762	Of the ones I've seen they are made from two props that are notched. Lamar

01-10-2008, 02:00 PM	#5
abufletcher Guest Posts: n/a	Very interesting! That would certainly test the skills of any woodworker! I suppose I was primarily wondering about the techniques used on earlier WWI era 4-blades props such as the ones used on the RE8s and DH4s, as well as some variants of the SE5a.