On Mar 1, 2006, at 2:33 PM, Peter wrote:

> And why is such a design 'lighter' than a turbopump ? A 20hp
> turbo (automotive, built of  common materials and not aerospace
>  stuff) is smaller than a six-pack of beer and weighs under 4 kgs.

> Afaik gas pressurized fuel feed for rockets was abandoned
> since the 1950's. No ?
>
Certainly not in the amateur rocketry space, where 4kg is quite
heavy...

BillW
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