ORIGINAL: jaka
Hi!
Don't missunderstand me...APC make very good props but under certain conditions, like in Q-500 pylonracing over here in Sweden where we use 80/20 fuel and 10x6 props, RAM and Graupner Cam-props beat APC!
But!...In Sport 40 pylon (That we raced 15 years ago) where we used 9x7, 9x6,5 and 9x6 props and (428) Q-500 pylon where we run Nelson and Jett engines ...APC was and is king!
So it kinda sounds like APC is tops in the 9" prop range and Graupner for the 10" props.. I'll look into it more later on. Thanks for the information, Jaka.
On a side note - The 9x7 and 10x5 APC props I have were really difficult to balance for some reason. I'm guessing the hole in the hub is off-center a tad bit. I got them as close as one could get.. The bigger APC props I have (13x6 and 13x7) were almost dead-on balanced.
Are the RPM limits higher on the Graupners/RAM props vs. APC? I know the APC's are supposed to handle more RPM than any MA prop made (
AFAIK), but what is the limit? I've been a little leary of spinning this 9x7 at 16,500rpm because of the cold. I'd hate it to flex and break throwing chunks in whatever direction they decide to go.. (Haven't been bit by a prop yet - I'm keeping my fingers crossed)