Re: Screw size and speed

[VBra676539@aol.com]

In a message dated 7/17/99 4:24:44 AM, michaelbholt@juno.com writes:

<<Where did Perry get the reduction gears?   Any idea if a significant
amount of energy was lost in the gears?


All this, and it seems to me that a boat with two madly spinning tiny
screws would just look and sound funny.   Big screws may inspire
more respect.


Mike Holt>>

Easy enough to find gears, and I'm sure the losses are pre-figured. I've got 
some brochures from Boston Gear around here somewhere. I was talking to them 
about a centerline reduction gear to take my 2600 RPM mtr down to 300, and 
changing to a bigger prop, of course. When I relocate that stuff. I'll get 
back to you with it.

The Pisces boats had a pair of 5 hp motors (custom wound in-house with square 
wire, so they weren't much bigger than a 1 hp perm mag mtr) with a planetary 
reducer and turned 14" props. 175 pounds of thrust on those units, and Phil 
still uses them on Aquarius I (don't know about III) and the surviving 
operational Pisces boats along with Taurus, still use them. They are pretty 
good for their age.

As for looking funny, all this stuff looks funny. Just ask Tommy's mom.

Vance