List of private spaceflight companies

Columns: Company name | Engine | Engine type | Applications | Status
Reaction Engines Ltd | SABRE | hybrid air-breathing /chemical | Skylon | Development | SpaceDev | RocketMotorOne | hybrid | SpaceShipOne | Retired | SpaceX | Kestrel | LOX / RP-1 | Falcon 1 second stage | Retired | SpaceX | Merlin | LOX / RP-1 | Falcon 1 , Falcon 9 , Falcon Heavy first stage/boosters | Operational | SpaceX | Merlin Vacuum | LOX / RP-1 | Falcon 9 second stage , Falcon Heavy second stage | Operational | SpaceX | Raptor | LOX / CH 4 | SpaceX Mars transportation infrastructure | Testing | TGV Rockets | RT30 | LOX / JP-8 | Michelle B | Development | Virgin Galactic | RocketMotorTwo | hybrid | SpaceShipTwo | 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