The Ekolot JK 01A Elf is a Polish mid-wing, single-seat motor glider, designed by Jerzy Krawczyk, produced by Ekolot of Krosno and provided as a complete ready-to-fly aircraft or as a kit for amateur construction.
Ekolot JK 01A Elf Wikipedia
The JK 01A Elf was designed by Krawczyk, based on the earlier work of American designer Alex Strojnikun. It features cantilever wings, a single-seat enclosed cockpit under a bubble canopy, fixed landing gear and a single engine in pusher configuration.
The aircraft is made from composites. Its 11.12 m (36.5 ft) span wing has an area of 10.80 m2 (116.3 sq ft), flaperons and provides a glide ratio of 26:1. The standard engine used was a 20 hp (15 kW) JPX D-320 two-stroke, but this engine is no longer available and any small horizontally-opposed engine in the 20 hp (15 kW) range can be used. An engine of this power provides a takeoff run of 150 m (492.1 ft). The propeller used has a folding design to reduce drag and the fuel tank fitted has a volume of 15 litres (3.3 imp gal; 4.0 US gal). The landing gear uses dual, close-set mainwheels and a smaller nosewheel, with no wingtip wheels
The company provides complete ready-to-fly aircraft and kits which offer the aircraft in various states of completion.
The first flight was made on 8 July 2006. There is no evidence of production beyond 2007/8.
Data from World Directory of Leisure Aviation 2011-12 and Ekolot
General characteristicsCrew: one
Length: 5.65 m (18 ft 6 in)
Wingspan: 11.12 m (36 ft 6 in)
Height: 1.92 m (6 ft 4 in)
Wing area: 10.80 m2 (116.3 sq ft)
Empty weight: 52 kg (115 lb) including ballistic parachute
Gross weight: 230 kg (507 lb)
Fuel capacity: 15 litres (3.3 imp gal; 4.0 US gal)
Powerplant: 1 × JPX D-320 two cylinder, air-cooled, two stroke aircraft engine, 15 kW (20 hp)
Propellers: 2-bladed floding composite
PerformanceCruising speed: 110 km/h (68 mph; 59 kn)
Stall speed: 42 km/h (26 mph; 23 kn)
Never exceed speed: 125 km/h (78 mph; 67 kn)
Maximum glide ratio: 26:1
Rate of climb: 2.5 m/s (490 ft/min)
Rate of sink: 0.6 m/s (120 ft/min)
Wing loading: 21.3 kg/m2 (4.4 lb/sq ft)