Ramjet bypass duct and preburner configuration

Ramjet engine

Ramjet propellants

Ramjet/scramjet inlet isolator unstart prevention

Recoup turbojet engine

Reduced noise jet engine

Reduced toxicity fuel satellite propulsion system

Reduced toxicity fuel satellite propulsion system including...

Reduced toxicity fuel satellite propulsion system including...

Reduced toxicity fuel satellite propulsion system including...

Reduced toxicity fuel satellite propulsion system including...

Reducing skin friction drag

Reduction of depressurization thrust termination jolt

Regenerative piston engine for combustion of liquid monopropella

Regenerative piston liquid propellant rocket motor

Rocket augmentation for combined cycle turboaccelerator jet...

Rocket engine

Rocket engine

Rocket engine

Rocket engine nozzle