Auxiliary take-off boosters igniting.
Close-up of the rockets!
SE <<FWOOOOSH>>
UrsusArctos: For military nerds out there, the Eva transporter looks like a scaled-up Northrop XB-49, a jet-powered flying wing from the late 1940s/early 1950s. Rocket-assisted takeoff (RATO) was used during the turbojet era, but it fell out of service because modern turbofan engines generate their maximum thrust at sea level.
