Do you reconise this hull bottom?

[Blackfin26]

That hull has a lot going on. Looks great but maybe could use some weight up front. 24 degree deadrise with the sea craft bottom? 1200 ponies...70 top end?

[Capt Chuck]

70 mph top end ? I suppose those NC SKA boys are drooling -------> hey BA17 you looking ?

[FlyingTime]

Yes I know that hull...

[FlyingTime]

Aaron Croswait built the majority of the boat along with Chris Walker from molds and jigs we provided but it will be labeled as a Tribute 37. The plan is to have Aaron provide the parts and the final assembly rigging and finishing will be done at the Tribute facility in Jupiter. First run we saw 80.5 but only turning about 5600 rpm's. Was told that those engines don't start creating their power until 6400 with the rev limiter at 7200. Completely wrong props on her now, 5 blade 30's. Should have another set to run this week. The boat is far from finished and it will have about 600lbs more weight fwd so the bow will come down about 5 1/2" and stern lift about 3". We are expecting low 90's once dialed in. She turns very well at high speed by tracking on the aft longitudinal steps.

[flyingfrizzle]

Originally Posted by FlyingTime

Aaron Croswait built the majority of the boat along with Chris Walker from molds and jigs we provided but it will be labeled as a Tribute 37. The plan is to have Aaron provide the parts and the final assembly rigging and finishing will be done at the Tribute facility in Jupiter. First run we saw 80.5 but only turning about 5600 rpm's. Was told that those engines don't start creating their power until 6400 with the rev limiter at 7200. Completely wrong props on her now, 5 blade 30's. Should have another set to run this week. The boat is far from finished and it will have about 600lbs more weight fwd so the bow will come down about 5 1/2" and stern lift about 3". We are expecting low 90's once dialed in. She turns very well at high speed by tracking on the aft longitudinal steps.

Thanks for the insight, I imagine it dose perform well if you had you hand in it.

[Bushwacker]

Originally Posted by FlyingTime

. . . She turns very well at high speed by tracking on the aft longitudinal steps.

Nice work and beautiful pics Steve! She must be well balanced because it looks like her running angle up on plane is almost the same as when she's at the dock! I understand that designing a boat with those transverse steps that can make hard turns without spinning out is quite a challenge! Looks like you put some pretty good height on those aft longitudinal steps, so it sounds like you found a good solution with those big vertical surfaces that must have a good grip on the water! I always thought that adding some more aeration with transverse steps would be the next logical phase in the evolution of the VDH hull, so it's great to see that you're continuing to advance Moesly's ideas! Have you ever built any models to test out those ideas?

I have a good book by British naval architect Uffa Fox, and way back in 1912, by going to transverse steps, they got 55 kts out of a 40' 5.5 ton boat with a pair of very heavy 400 hp engines! Denny

[FlyingTime]

Originally Posted by Bushwacker

Nice work and beautiful pics Steve! She must be well balanced because it looks like her running angle up on plane is almost the same as when she's at the dock! I understand that designing a boat with those transverse steps that can make hard turns without spinning out is quite a challenge! Looks like you put some pretty good height on those aft longitudinal steps, so it sounds like you found a good solution with those big vertical surfaces that must have a good grip on the water! I always thought that adding some more aeration with transverse steps would be the next logical phase in the evolution of the VDH hull, so it's great to see that you're continuing to advance Moesly's ideas! Have you ever built any models to test out those ideas?

I have a good book by British naval architect Uffa Fox, and way back in 1912, by going to transverse steps, they got 55 kts out of a 40' 5.5 ton boat with a pair of very heavy 400 hp engines! Denny

Thank you Denny. We had CFD analysis done on a 75' convertible sportfish 3D model that recorded over 60 knots with 5200hp. But, the first real model testing was the 25' prototype that we've been running around for about 3 years now. That boat will run over 70mph with a Etec 250 ho mounted on a jack plate.

[Bushwacker]

Originally Posted by FlyingTime

. . . We had CFD analysis done on a 75' convertible sportfish 3D model that recorded over 60 knots with 5200hp. But, the first real model testing was the 25' prototype that we've been running around for about 3 years now. That boat will run over 70mph with a Etec 250 ho mounted on a jack plate.

I was thinking scale models (I'm showing my age!), but yea, if you have CFD capability, that's obviously the way to go! Analytical models allow you to quickly evaluate a lot of tweaks and provide good insight on what's really going on with the water flow along the hull! And having a prototype to verify the analytical model is even better! 70 mph on a 25' boat with about 275 hp is impressive! The bass boat guys would be jealous!

[manitunc]

Originally Posted by FlyingTime

Thank you Denny. We had CFD analysis done on a 75' convertible sportfish 3D model that recorded over 60 knots with 5200hp. But, the first real model testing was the 25' prototype that we've been running around for about 3 years now. That boat will run over 70mph with a Etec 250 ho mounted on a jack plate.

Is that prototype going to be made for general consumption? We need a new contender in the 25' single engine range. I want one.