I/O (Sterndrive) Conversion to Outboards

[jlh3rd]

"and we shall see how it all works out in terms of the boat performance "

that's the million dollar question.

 

[redneck joe]

i think he is actually in for under $100k....

 

[Pmt133]

Do you have a proposed set of metrics to assess boat performance? Or is feels good enough, good enough?

 

[redneck joe]

feels good is always enough.

 

[tpenfield]

Do you have a proposed set of metrics to assess boat performance? Or is feels good enough, good enough?

The happiness meter will include the following inputs . . .
.

 

[Pmt133]

Makes sense, fuel usage is always smiles per gallon anyway.

 

[redneck joe]

explain the trim metrics; not familiar.

 

[tpenfield]

explain the trim metrics; not familiar.

Trim is the angle of the keel vs. water level. So, a zero angle would be even with the water level. Generally, you want a slight upward angle at rest and not too much upward while underway.

I’m hoping for a slight up angle at rest (0.5-1.0 degrees). And less than 3 degrees underway. The Naval Architect modeled a 7 degree bow rise coming out-of-the-hole and about 2 degrees at WOT

 

[tpenfield]

Speaking of WOT . . . In discussing propeller pitch with the re-power shop we came up with a 19” pitch as the starting point (19 x 16). Estimated top speed would be in the 51-53 mph range if the engines can make their WOT speed of 6,000 RPM