The full scale was powered by an engine somewhat more powerfull than a K&B .45 and a Scozzi fan. It had a Garrett ATF-3 turbofan that made 4,050 lbs of thrust.
The Compass Cope R was one of the first, and at that time the largest (81 ft. span) RPV to take off and land on a runway. It had a retractable tricycle landing gear system.
It was a big bird for that time. 81 ft span, 37 ft long, and 8ft high to the top of the engine pod. The gross weight was a little over 14,000 lbs. It had an unrefuelled endurance of 30 hours.

It was the grandpappy of the totally autonomous RQ-4A Global Hawk. Global Hawk has a 116 ft wingspan--more than a Boeing 737. Power is an Allison turbofan with 7,500 lbs of thrust.
From the east coast, the Global Hawk can taxi out, take off, climb to 65,000 feet, transit the Atlantic and Europe, fly the programmed mission(s) over lets say, Boznia for 24 hours, then cross Europe and the Atlantic , get in the pattern and land among other traffic (under ATC control) and taxi back to the programmed lat-long parking spot the mission planners have selected, and shut down. It requires absolutely no human intervention in the performance of a normal mission. It can also be retasked during a mission as required by satcom, and recovered at a different base. All imagry and data can be downlinked in real time (satcom again), to area and theater commanders and interpreters while performing the mission.
We recently flew from Edwards AFB to Australia, by way of some other garden spots, and flew a month's worth of maritime recon missions for the Australian Air Force. That bird flew back to EAFB upon completion of the Aussie missions.
BTW, we carry 2000 lbs of combined recon payloads as well.

Harley Condra
BVM REP
RAM REP
Kid in the candystore.