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Richard Casady

On Wed, 28 May 2008 07:43:48 -0700 (PDT), wrote:

As a general rule of thumb, a 32-lb thrust motor is approx equal to a
5 HP.

How do you figure? Thrust times speed equals HP. 1 pound of thrust
equals one HP at 375 MPH, for what its worth. To get that much power
with 32 pounds thrust requires a speed of almost 60 MPH. One HP is
about 745 watts or 550 foot pounds per second. Incidently, 5 HP
requires about 300 amps at 12 v. This will kill a reasonably big
battery in next to no time. As a general rule of thumb, thrust is only
loosely related to power.

Casady