Could use an electromagnetic rail to slowly but surely accelerate and launch it up to to cruising altitude https://en.m.wikipedia.org/wiki/Rocket_sled_launch ht

Could use an electromagnetic rail to slowly but surely accelerate and launch it up to to cruising altitude https://en.m.wikipedia.org/wiki/Rocket_sled_launch https://en.m.wikipedia.org/wiki/Rocket_sled_launch