Questions tagged [rs-68]

The RS-68 engine is used on the Delta 4 family and burns LOX/LH2.

Filter by
Sorted by
Tagged with
19
votes
1answer
2k views

Why not use Sparklers on Delta-4 Heavy launches to burn off the hydrogen?

With three CBC (Common Booster Core) modules firing their RS-68A engines simultaneously, a Delta 4 Heavy launch is an impressive sight. The RS-68 is a LOX/LH2 engine. As part of the launch sequence, ...