The first stage, and particularly the strap-on boosters, never get to anything like orbital velocity, so the fuel needed to decelerate is reasonable. SpaceX business model is based on the extra fuel and having the take-off thrust 20% more than is needed for just the payload is cheaper than binning an expensive set of rocket engines every launch.
The first stage, and particularly the strap-on boosters, never get to anything like orbital velocity, so the fuel needed to decelerate is reasonable. SpaceX business model is based on the extra fuel and having the take-off thrust 20% more than is needed for just the payload is cheaper than binning an expensive set of rocket engines every launch.