Prop Size Question

[Dhadley]

Re: Prop Size Question

Sounds like a good plan. When you start looking at props take a look at the Turbo Lightning Jr. A very good prop.

 

[Hunky Dory]

Re: Prop Size Question

Great thread! I learned alot just lurking. Tilting, cavitating in turns, porpoising -- all fixed by optimizing vertical adjustment! Who knew?<br /><br />Is this worthy of FAQ status? It's certainly a comprehensive hands-on tutorial in how to set-up an outboard -- especially since we were privvy to first hand observation of both extremes as well as the final spot-on optimization. <br /><br />Is there any sweeping generality about where the anti-ventilation plate is best placed in relation to the at-speed waterline?

 

[Dhadley]

Re: Prop Size Question

Great thread! I learned alot just lurking. Tilting, cavitating in turns, porpoising -- all fixed by optimizing vertical adjustment! Who knew?

Hummmm.....I wonder who......<br /><br />As far as the X dimension, that'll come with experience. The final X dimension is a marriage between the hull and prop and is goverened by intended use. <br /><br />Some props run higher than others. In this case the Raker runs higher than an SSTII. A Stiletto might run a tad higher. A Turbo, especially a Lightning Jr will run higher yet. A 4 blade Turbo will run higher than that. <br /><br />Then you have set back. Generally speaking, the further back the motor sits the higher it'll run. And hull design. A hull with a pad and step will have a greater X dimension than a standard V. A tunnel will run a higher dimension yet. <br /><br />And so on. Very simple. Ya fool with this stuff for 40 years and it just comes naturally. Then they go and build a new prop. Or hull design. Or gearcase shape. Or..........