List of private spaceflight companies

Columns: Company name | Engine | Engine type | Applications | Status
Accion Systems Inc | MAX-1 , TILE | electrospray ion | small satellite / CubeSat | Development | Ad Astra Rocket Company | VASIMR | plasma propulsion | space tug/orbital transfer vehicle | Development | ARCA | Executor | LOX / RP-1 | IAR 111 , Haas 2 , Haas 2b , Super Haas | Development | Blue Origin | BE-3 | LH2 / LOX | New Shepard | Operational | Blue Origin | BE-4 | LOX / CH 4 | Vulcan , New Glenn | Development | CU Aerospace | PUC | microcavity discharge | small satellite / CubeSat | Development | CU Aerospace | CHIPS | resistojet | small satellite / CubeSat | Development | CU Aerospace | PPT-11 | pulsed plasma | small satellite / CubeSat | Development

Example questions:
Who was the private spaceflight company with a retired hybrid engine acquired by ? | The private spaceflight company located outside of the US uses which type of jet engine ? | The engine being developed by the private spaceflight company headquartered in Kent has how many applications ? | The spaceflight engine in an operational Falcon 1 uses which type of injector ?

Answers:
Sierra Nevada Corporation | Precooled | Two | Pintle