Re: Using nuclear power to make renewables and a hydrogen economy cost effective
From: Ian St. John (istjohn_at_noemail.usa)
Date: 11/10/04
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Date: Tue, 9 Nov 2004 20:35:41 -0500
Hatunen wrote:
> On Fri, 5 Nov 2004 19:32:36 -0500, "Ian St. John"
> <istjohn@noemail.usa> wrote:
>
>
>> The measure of efficiency in rockets is ISP. That is, the momentum
>> change per pound of fuel.
>
> That may be an odd definition of efficiency, which is normally
> defined as energy out divided by energy in.
It depends on what you are describing, now doesn't it? Fact is that ISP is a
measure of ROCKET performance, not energy transfer. The 'efficiency' has to
be in terms of impulse(the *purpose* of the rocket motor) per unit of fuel
(the *cost* of the motor)
>
> I think what you are describing is "specific impulse" or
> something.
Exactly what I said.
>
> ************* DAVE HATUNEN (hatunen@cox.net) *************
> * Tucson Arizona, out where the cacti grow *
> * My typos & mispellings are intentional copyright traps *
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