The Lockheed JetStar was first flown on the 4th of September 1957 in response to a USAF requirement. Designed by Kelly Johnson (according to user jetstar on airliners.net, a former pilot of the plane), it had 4 engines and was the first dedicated business jet to enter service. It was also eventually used by the USAF as the C-140 JetStar.
The original plane as shown above had only 2 engines, but due to problems with building the Bristol-Siddeley Orpheus turbojets which the prototype had, they were eventually switched out for 4 P&W JT12 turbojets as no other engine available in the US at the time would have enough power AND fit in the nacelles.
I hope you’ve at least learnt more about this amazing plane even if you don’t want any more GA aircraft (but why wouldn’t you?)
Have a great day!