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Who first came up with ullage motors?
Jay Gallentine
post Oct 8 2006, 09:03 PM
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Hello everyone,

In researching a social history of unmanned spaceflight, I am stuck on (yet another) conundrum: who, praytell, first came up with the concept of a ullage motor, to settle fuel in a weightless upper-stage?

Right now I have it that it's the Soviets, in working out the bugs on their Molniya launcher, but what do people think?

Thanks much,
Jay Gallentine
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Jim from NSF.com
post Oct 9 2006, 01:43 PM
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Thor Agena had them for Discover
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- Jay Gallentine   Who first came up with ullage motors?   Oct 8 2006, 09:03 PM
- - Jim from NSF.com   Thor Agena had them for Discover   Oct 9 2006, 01:43 PM

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