by N3322G » Tue May 15, 2012 1:43 pm
Michael,
I have the K2U props and are very happy with them.
Heads up that they take a different torque value for install. When torqued incorrectly, it can and did damage the prop assembly and spinner.
Since my Mom worked with Hartzell to develop them and K2U got the STC, I know that the original 337 included a statement to allow 10% more take-off roll. We never noticed any difference and the STC you'll receive does not carry this warning. Cruise speed may improve a bit depending on the rest of factors for your aircraft. Another benefit is the heavier backplate that is not prone to cracking the way the original was - hope you get back flying soon.
Pat
Patricia Jayne (Pat) Keefer ICS 08899
PA-39 #10 Texas