Neumann Drive

Point out news stories, on the net or in mainstream media, related to polywell fusion.

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Carl White
Posts: 290
Joined: Mon Aug 24, 2009 10:44 pm

Neumann Drive

Postby Carl White » Wed Oct 04, 2017 5:25 pm

Anyone heard of these people?

http://neumannspace.com/science/

They claim to have made an ion drive that has broken the record for ISP using solid fuel and a process similar to arc welding.

Exhaust velocity of up to 140 km/s. Exhaust is quasi-neutral.

Video on how it works: https://www.youtube.com/watch?v=4TVipU98g9s

krenshala
Posts: 880
Joined: Wed Jul 16, 2008 4:20 pm
Location: Austin, TX, NorAm, Sol III

Re: Neumann Drive

Postby krenshala » Wed Oct 04, 2017 5:40 pm

Checking the website, they list a number of different fuel types they have tried. I think I most enjoy the ones that didn't work. e.g., Bismuth.

in the article they wrote:Bismuth was a material we had high hopes for. It has been used as propellant in other electric spacedrives, notably in the work done by Massey on Bismuth-fuelled Hall Effect Thrusters at Michigan Technological University.

There are reasons to think Bismuth would have been a good fuel for the Neumann Drive – it’s a heavy element, non-radioactive and with a low ionisation energy and a potentially useful electron cross-section.

We were hoping for decent results.

We were horribly, awfully, wrong.


If nothing else, they have good writing skills. ;)

ladajo
Posts: 6084
Joined: Thu Sep 17, 2009 11:18 pm
Location: North East Coast

Re: Neumann Drive

Postby ladajo » Wed Oct 04, 2017 5:47 pm

A little thin on details, however intriguing. Has this not been tried before, maybe 70s or 80s?
What are the actual power requirements per unit thrust is my biggest question.
The development of atomic power, though it could confer unimaginable blessings on mankind, is something that is dreaded by the owners of coal mines and oil wells. (Hazlitt)
What I want to do is to look up C. . . . I call him the Forgotten Man. (Sumner)

Carl White
Posts: 290
Joined: Mon Aug 24, 2009 10:44 pm

Re: Neumann Drive

Postby Carl White » Wed Oct 04, 2017 7:11 pm

There's some discussion on:

https://forum.nasaspaceflight.com/index ... ic=42920.0

Bunch of numbers here:

http://neumannspace.com/blog/fuel-of-th ... olybdenum/

They say they should be able to maintain a power efficiency of 20 micronewtons per watt.

Diogenes
Posts: 6824
Joined: Mon Jun 15, 2009 3:33 pm
Location: Ft. Sill Oklahoma

Re: Neumann Drive

Postby Diogenes » Wed Oct 04, 2017 7:38 pm

Carl White wrote:Anyone heard of these people?

http://neumannspace.com/science/

They claim to have made an ion drive that has broken the record for ISP using solid fuel and a process similar to arc welding.

Exhaust velocity of up to 140 km/s. Exhaust is quasi-neutral.

Video on how it works: https://www.youtube.com/watch?v=4TVipU98g9s



Yes. Heard of them a long time ago. For some reason, metallic fuel didn't grab me very much, but it's hard to argue with efficiency even if you don't care for the method used to obtain it.
‘What all the wise men promised has not happened, and what all the damned fools said would happen has come to pass.’
— Lord Melbourne —


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