the Bumble Bee II

 

This was built and flown by Robert H. Starr in April 1988 at Marana Airpark outside Tucson, Arizona (below).  Apparently the 3 gallons is only is enough for 30 minutes in the air.

Data
Length: 8 ft 10 in (2.7 m)
Wingspan: 5 ft 6 in (1.68 m)
Empty weight: 396 lb (180 kg)
Max. takeoff weight: 574 lb (261 kg)
Power plant: 1 × Continental C85 4-cylinder air-cooled horizontally opposed piston engine, 85 hp (63 kW)
Fuel capacity: 3 US gallons (11.35 litres)
Maximum speed: 165 knots (190 mph, 305 km/h)
Cruise speed: 130 knots (150 mph, 241 km/h)
Stall speed: 75 knots (86 mph, 139 km/h)
Service ceiling: 14,000 ft
Rate of climb: 4,500 ft/min