Re: [PSUBS-MAILIST] Dive planes

Good tip on the propulsion weight. I'm working on a tubby little design using mostly old Perry parts (if I can get them). It will have a rolled tail cone, a forward dome and removable conning tower. The hull will be 55" OD and about 10 feet long, which will keep me at about 4 tons or a little less, which is small for a Perry, but needs power for the mass. The tail cone displaces a little over 1400 pounds, I think, and should have half that in buoyancy, so I'll be cutting it close on weight. Sound familiar? I was thinking a prop in the 18" to 24" range. We'll see how that works out. And expect it to have a big rudder, working dive planes and some small maneuvering thrusters. We'll see how that works. If I get 3 1/2 knots out of this thing, I'll be surprised. I'm designing for 1000 feet, so she's going to be a heavy little beast. Still trailerable though, sort of.

Frank I am at 12 hp. But like Vance has stated, I am paying for it in overall weight. Overall I am

thinking it is costing me about 600lbs. If I had it to do over again I am not sure I would go this way.

I am going to get the speed I wanted but it is a high price. I will be needing to add some

buoyancy, as at this point I would only have a 110lb drop weight and I want more.

I was worried that the prop would not work well, but my fears have been removed as it is

performing great. Very little cavitation 4 blade 14X13 bronze

Dean

In a message dated 9/13/2009 8:18:43 P.M. Central Daylight Time, ShellyDalg@aol.com writes:

Dean's sub has 10 horse or so doesn't it