On Thursday, January 28, 2021 at 1:00:36 PM UTC-5, Jim Wilkins wrote:
"Eli the Bearded" wrote in message ...
In rec.crafts.metalworking, bruce bowser wrote:
On Saturday, January 9, 2021 at 5:45:56 PM UTC-5, pyotr filipivich wrote:
Oh yes, and mower blades can be used to make plane blades -
regular or shaped for a molding plane. All depends on where you want
to invest your time.
You mean adjustable blades for aircraft engines?

No, like the wood shaping tool called a "plane".

Elijah
------
the flat ones make planes (math sense) out of wood
----------------------------------------

Adjustable blades on an airplane engine nearly killed Howard Hughes.
https://en.wikipedia.org/wiki/Hughes_XF-11

Nowadays, the FAA (Federal Aviation Administration) certifies them, like with Hamilton-Standard's Ground Adjustable Prop.