Am 05.12.21 um 14:27 schrieb Bruno Berger (bruno.berger):
Am 05.12.2021 um 14:21 schrieb Uwe Klein:
Am 11.11.21 um 22:02 schrieb Peter Fairbrother:
On 11/11/2021 19:28, Matthew JL wrote:The payload does not only have translational speed at release
Spinlaunch is just space guns wrapped in a new package.A 230gr .45 ACP bullet from a Thompson M1A1 submachinegun has a muzzle
energy of 633J. At 800 rounds per minute that's 8.437 kW.
Allowing for 90% electrical-mechanical efficiency, a Turnigy 5500mAh
4S2P 140C Hardcase LiPo Battery weighing 543g can supply that much power
for 30 seconds plus.
Just sayin'.
but also exits with some rotation.
( rpm equivalent to the rotating "starter" arm )
How do they fix that?
uwe
They didn't. That's why it comes out "sideways" of the window port and
it continuous to tumble during the flight because the fins catch up.
Most people didn't realize that
