RE: Screw size definitions

["Stymer" <stymer@home.com>]

Second number is pitch.



-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of
VBra676539@aol.com
Sent: Monday, July 19, 1999 2:30 PM
To: personal_submersibles@psubs.org
Subject: Re: Screw size definitions



In a message dated 7/19/99 4:28:40 PM, Ray.Keefer@eng.Sun.COM writes:

<<Hi,

[snip}
> Perry  boats turned 36 X 36 3-bladed bronze props (they weighed 175
pounds!)
> that  were driven by 10 hp 120V Reliance motors through reduction gears
and

[snip]
> memory serves with 17 to 1 gear  reduction. They turned a 28 X 24 bronze
> wheel and ran nearly 5 knots on the  surface.
>

Could someone explain the dimensioning to a prop? I assume "wheel" also
meant
prop. Like:

36 x 36 3-blade Bronze
 |    |  |        |
 |    |  |         --->  Material it was made out of.
 |    |  |
 |    |	  ---> 3 blade
 |    |
 |     ---> ?
 |
  ---> 36inch diameter


Thanks,
Ray>>

Sorry. 36" diameter (circle turned) and 36" pitch, ie., a one to one prop.
Vance