28 x 30 Propellers 2" bore -4 blade -LH & RH

[SKYCHENEY]

These are all sold.

Repower props are 30x28 Dynaquads

[cww]

These are all sold.

Repower props are 30x28 Dynaquads

Is that prop size just a starting point? You kept the same gears right? Won't she be under-propped if you are going from 430shp to 600hp+ and you're within an inch or two of your original size? That's a large increase in power.

[SKYCHENEY]

Is that prop size just a starting point? You kept the same gears right? Won't she be under-propped if you are going from 430shp to 600hp+ and you're within an inch or two of your original size? That's a large increase in power.

New gears. Same ratio. That's the starting point. Its a long story, but here is the results before dialing it in. Hit 22kts but more work to do yet.

[Bob Quinn]

That is impressive! Do the new motors turn higher rpm's?

[offshoretoys]

Still have a second set of wheels for sale? 28x30 Dyna quads?

[SKYCHENEY]

All spare props are sold.

New engines should turn 2300 loaded.

New wheels are 4 blade.

So, here is the bad news. I bought the engines and gears from the local Cat dealer. We all thought these were 2:1 reduction gears. Everything was engineered around this. Now, we all know these are 1.5 to one gears and I can only make 1890 rpm. The Cat dealer has acknowledged the mistake and has ordered new gears (that won't be here until January). I'm disappointed as I should be finished with this project but it's going to drag on. We did hit 22kts while being way over-propped. But the real numbers won't be available until we swap out the transmissions. I won't run them overloaded, so for now I get to run at hull speed and wait.

[cww]

All spare props are sold. New engines should turn 2300 loaded.New wheels are 4 blade. So, here is the bad news. I bought the engines and gears from the local Cat dealer. We all thought these were 2:1 reduction gears. Everything was engineered around this. Now, we all know these are 1.5 to one gears and I can only make 1890 rpm. The Cat dealer has acknowledged the mistake and has ordered new gears (that won't be here until January). I'm disappointed as I should be finished with this project but it's going to drag on. We did hit 22kts while being way over-propped. But the real numbers won't be available until we swap out the transmissions. I won't run them overloaded, so for now I get to run at hull speed and wait.

You hit 22kts overpropped by 50%. That thing is going to fly when you’re done.

[SKYCHENEY]

Cat just ordered new transmissions. They expect them to be delivered in January. For now, I'm just running over-propped but only at hull speed. SO No new performance numbers until next spring.