southern safaris wrote:Prototype wrote:The Jx is just as dead at 6k with a 268 as in the 4k range! My 2 blade likes 5200 with a 2.68.........because they are unlike any other prop I've used?
Fitting for the snap of holley 4bbl or nos but very timid everywhere else.
If they weren't so wide I'd almost say they were designed for aircraft apps!
Hey prototype can you elaborate on your findings a little more .... I'm interested on the" just as dead at 6k as 4k " part I'm tuning in a new boat right now with a 2 blade jx and been everywhere from 4600-5400 just playing with it kinda want to compare your feelings to mine so to speak, I just didn't follow you I guess on your first post (sorry I'm just a simple minded fella) most have to write real slow for me cause I don't read real fast
I've found the JX likes pitch in the mid 20's on mine with a 268! Low 20's it just spins up to burn fuel and not impressive at all. Pitching it to 30, my motor with the jx just can't handle that drag. I would think it has a relationship with torque and all the other crap like boat length and width and load, but I have a unique situation to test it under load and obstacles! I am finding the jump point/snap,,,, in the jx loaded or unloaded which I've never found in the s or ngr's.
Kwan missed my post about the jx having a power band when it grabs air. The good thing is there is only one band/shot to the jx.
Never twisted a s or ngr as high as I've twisted a jx. never had a need too. That's why I state a smooth prop through all ranges or a needy prop through limited ranges.
But it is easy on the ears regardless!!