Merlin engine

We all know SpaceX's Merlin engine, but which of these other companies has an engine named "merlin"?

• Rolls Royce

• Pratt and Whitney

• General Electric

• Briggs & Stratton

Which fuel injector type is used on Merlin?

• Pintle

• Coaxial Swirl

• Showerhead

• Cross-impinging

  doublet

Which type of ignition was used on Merlin 1A?

• Torch ignition

• TEA-TEB

• Pyrotechnic ignition

• Laser ignition

Which type of cooling was initially used on merlin?

• Ablative

• regenerative

• fuel-rich combustion

• film cooling

About how much percent is the current sea level thrust of merlin 1D as opposed to the thrust of merlin 1A?

• 250%

• 125%

• 175%

• 200%

How many times did a falcon rocket launch with a merlin 1B?

• 0

• 3

• 5

• 11

Who was the chief engineer of Merlin development?

• John Insprucker

• Tom Mueller

• Joao Semedo

• Gwynne Shotwell

What is so special about the Merlin actuator system?

• It uses high pressure fluid from the turbopump

• It only actuates on one axis

• It's pneumatic instead of hydraulic

• It actuates on 4 axis

Which company was contracted for the design and building of Merlin 1A?

• Barber-Nichols

• XCOR aerospace

• Moog-ISP

• PLD Space

Why did the COTS Demo flight 1 launch use a shorter upper stage merlin engine bell?

• SpaceX was testing a new bell design.

• They had to cut off a meter of the bell due to a manufacturing error

• They were using a 2-part extendable bell design.

• They used a sea level engine due to vacuum engine shortages