Author Topic: Green Launch hydrogen gas gun launcher (Read 2970 times)

Asteroza · « **on:** 04/18/2022 09:00 am »

Forum search is failing me...

A hydrogen light gas gun launcher is vying for attention.

https://greenlaunch.space/

Echos of project SHARP and Gerard Bull (but they don't seem to be using a Martlet style projectile?)

They recently popped up over at the New Atlas science news site, even though they've been puttering along since 2017

https://newatlas.com/space/greenlaunch-space-cannon-gas-launch/

I suppose if SpinLaunch can get VC funds, these guys have a shot... pun intended

tankat0208 · « **Reply #1 on:** 04/18/2022 03:45 pm »

This is an interesting group, their apparent argument is it's optimized for the constellation of microsatellite : smaller the electronics get, more G-forces they can handle. They're also saying the constellation approach mean gun won't have to be adjusted significantly after each launch.

su27k · « **Reply #2 on:** 04/19/2022 06:43 am »

Hunter has been on The Space Show for several times, most recently appearance is from a month ago: https://thespaceshow.com/show/15-mar-2022/broadcast-3841-dr.-john-hunter

Robotbeat · « **Reply #3 on:** 04/19/2022 02:27 pm »

It’s probably a better approach than Spinlaunch. Easier to make the tube longer to reduce peak accelerations (scales linearly, unlike scaling cubed like spinlaunch’s vacuum chamber), and acceleration occurs along the long axis instead of to the side.

Nomadd · « **Reply #4 on:** 04/19/2022 05:26 pm »

Georges Melies beat them to it 120 years ago. He just forgot to call the gunpowder "green".

libra · « **Reply #5 on:** 04/19/2022 06:06 pm »

I raise you a Jules Verne, who got an Apollo program look-alike (Apollo 8 TBH) 100 years in advance, except with a huge gun rather than a Saturn V. With a launch pad (launch hole ?) in Florida less than 100 miles from future KSC.

Robotbeat · « **Reply #6 on:** 04/19/2022 08:07 pm »

Jules Verne used gunpowder or guncotton, whose maximum velocity is much less than hydrogen. Tsiolkovsky correctly pointed out gunpowder wasn’t nearly high enough gas velocity.