What is 'pitch'?

[achris]

I have been reading quite a few threads lately where people refer to the propeller pitch as 'degrees'...
That makes me want to


​​​
The pitch of a propeller is a measurement of how far forward, in inches, that propeller would move in one rotation, assuming no slip.

I have a 17P (17 INCH pitch) propeller on my engine....

This is what 17 degrees looks like....



This is what that propeller looks like from the side....



Firstly, you'll also notice the blade angle changes between root and tip, so how
can the pitch be referred to by angle?
Secondly, does that blade root angle look even remotely like 17 degrees? No, so
stop referring to propeller pitches in degrees, or I may have to send this guy out after you!



Cheers.

Chris….
iboats moderator.

 

[Scott Danforth]

pitch is what you do when you are in sales..... or is that drink on the expense report.
pitch is what happens when you "toss" a baseball
pitch is what oozes out of a pine tree
pitch is also the measured forward motion of a screw in one revolution

 

[Chris51280]

:lol: Make it a sticky.

 

[GA_Boater]

I use a pitch pipe to measure. Sounds good to my tin ear! :lol:

 

[Faztbullet]

That 17° is usually rake which people get confused.

 

[QBhoy]

So funny. Love this !

archimedes would be proud of you Chris !

 

[achris]

So funny. Love this !

Archimedes would be proud of you Chris !

Yes, Archimedes was almost right, but in the end he screwed it... :laugh::laugh::laugh:

Chris.......

 

[Old Ironmaker]

Pitch is also fine metallurgical non combustible coal used in Ironmaking also known as braise.