Re: Lifter - Autonomous with Aerodynamics? (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Fri, 19 May 2006 00:09:47 +0800
From: Peter Terren <pterren@xxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Lifter - Autonomous with Aerodynamics?

Hmmm... No one has, true but consider the case of lifter propulsion PLUS 
aerodynamics and the figures change. The Gossamer Albatros flew a 30kg plane 
with a 70kg person with 200W. If that 70kg person is a lifter supply instead 
then this is a large supply easily capable of 1kW at 100kV perhaps.
This is only 1kg of thrust (at 1g/watt) but I am not sure how that compares 
with 200W power to an efficient prop.  Anyone care to contribute to these 
figures?
http://en.wikipedia.org/wiki/Gossamer_Albatross
Peter
http://tesladownunder.com/Lifters.htm

> ---------- Forwarded message ----------
> Date: Tue, 09 May 2006 19:16:34 -0700
> From: David Mathes <airman@xxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Lifter (fwd)
> In a word No, nada, zilch.
> No one to date has made a lifter that is self contained in the public 
> sector.
> No one has used nuclear material in producing a lifter power supply.
> In particular, the grams per watt is too high. A self contained 
> (autonomous) lifter will have a 1 gram per watt or less efficiency. Or put 
> another way, the power/mass ratio in Watts per gram needs to exceed 1, 
> preferably 10.