The angle of the blade changes from tip to base. The pitch, shouldn't
change.
Mach moves the center of pressure and center of lift back on an airfoil.
Airfoils that work well at mach aren't very similar to good "slow"
airfoils.
On Aug 5, 2012 7:51 PM, "Larry&Sallie Flesner" wrote:
>
> >
> >What
>
>What about the different tip shapes being used these days. Does that help in
>reducing the tip sound on props of bigger diameters?
>I'm not sure of this question as well, I have heard of props that have
>multiple pitches set along the blades that work better at different RPM's. I
>understand th
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Phillip Hill
Sent: Sunday, August 05, 2012 7:01 PM
To: KRnet
Subject: Re: KR> RE: 2300 Propellor
The 'p' tip on the Prince prop does improve performance and is quieter.
On Aug 5, 2012 6:54 PM, "Brian and Sue Dev
The 'p' tip on the Prince prop does improve performance and is quieter.
On Aug 5, 2012 6:54 PM, "Brian and Sue Deveson"
wrote:
Hi,
What about the different tip shapes being used these days. Does that help in
reducing the tip sound on props of bigger diameters?
I'm not sure of this question as
No, most fixed pitch props have higher bade angle at the root than at the
tip...sort of like the wing on a plane, the pitch angle is higher at the
root than at the tip. The pitch of a prop is derived from the pitch
measured at 75% of the radius of the prop.
On Aug 5, 2012 6:54 PM, "Brian and Sue D
understand that most fixed pitch propellers have a constant pitch along the
blade.
Thank you
Brian
Bundaberg Aust.
- Original Message -
From:
To: "KRnet"
Sent: Monday, August 06, 2012 12:53 AM
Subject: Re: KR> RE: 2300 Propellor
Here in lies a paradox of sorts.
An ai
Just bought a Sterba prop. Contact him by email for best results. Very easy to
work with. Peter
Here in lies a paradox of sorts.
An air propeller's tip speed limit is about 900 ft/s (speed of sound). The
rule is to keep max tip speed below 900ft/s.
The prop is at its most efficient tip speed at just below 700 ft/s (above
which compressibility starts to degrade efficiency). So lets aim for
Concur on calling Joe, and or Ed Sterba. I've got a Revmaster 2100, but I
don't know of anyone running the 2300 on a KR. I could be mistaken. My prop
diameter and pitch is 54" x 54" using on a trigear. Prop by Ed Sterba. 52"
is common as well but not over 54 to keep tip speed below the magic
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