Still trying to figure out my options here with my project.
Here is my setup:
RV6
IO-360-A4Jc (O360a4j with Bendix fuel injection & hollow crank)
Hartzell HC-C2YL-1BF/F7663-4 (the one for an O-320)
I asked Hartzel if i could simply swap out the Hub for one that would fit my blades and work on an IO-360 and their response
"This makes perfect sense, by swapping the hub it would be possible to save the blades. I’ve done some digging here on your behalf and tried to see if it would be possible. By moving from the 320 to the 360 you would be moving from the L flange to a hub with a “K” or “R” flange and that would change the hub and you’d be able to keep your blades. With that being said, Hartzell currently does not make an application which has the K or R flange hub with the F7663-4 blades. Please see the attached type certificate data sheet P920 (page 8 specifically). You’ll note that the only approved data we have for the 7663 blade is on lycoming 290, 320, and IO-320 engines.
Although it would be technically possible to swap the hub out and use the old blades (should function just fine), we do not have a model of propeller supported with data to support the vibrational loads associated with the new higher horsepower engine using these blades."
I believe I'm dealing with the same RPM's on the 360 vs the 320 @ 2700 but and similar MP - is it just a 'power' going to the blades issue that would cause vibrations?
Thoughts / advise?
Here is my setup:
RV6
IO-360-A4Jc (O360a4j with Bendix fuel injection & hollow crank)
Hartzell HC-C2YL-1BF/F7663-4 (the one for an O-320)
I asked Hartzel if i could simply swap out the Hub for one that would fit my blades and work on an IO-360 and their response
"This makes perfect sense, by swapping the hub it would be possible to save the blades. I’ve done some digging here on your behalf and tried to see if it would be possible. By moving from the 320 to the 360 you would be moving from the L flange to a hub with a “K” or “R” flange and that would change the hub and you’d be able to keep your blades. With that being said, Hartzell currently does not make an application which has the K or R flange hub with the F7663-4 blades. Please see the attached type certificate data sheet P920 (page 8 specifically). You’ll note that the only approved data we have for the 7663 blade is on lycoming 290, 320, and IO-320 engines.
Although it would be technically possible to swap the hub out and use the old blades (should function just fine), we do not have a model of propeller supported with data to support the vibrational loads associated with the new higher horsepower engine using these blades."
I believe I'm dealing with the same RPM's on the 360 vs the 320 @ 2700 but and similar MP - is it just a 'power' going to the blades issue that would cause vibrations?
Thoughts / advise?