Design 

Jerzy Krawczyk, in addition to Ekolot’s Junior and Topaz, has several light aircraft, cropspray, and sailplane designs to his credit. In creating the Elf he has employed composite sandwich and carbon structures to achieve the exceptional strength and durability required to pass UK BCAR Section ‘S’ , German and other Airworthiness Requirements.

The Elf meets all of our original design criteria, is a delight to fly, and possesses exceptional soaring capabilities.

Engines



                                   JPX                                                       Polini Thor 200 EVO

Our prototype used the JPX 330 engine which, unfortunately, was withdrawn from production in 2006 after over 20 years in the market. This has now been replaced by the highly regarded Polini Thor 200 EVO.

Control 

The Elf employs full span flapperons, and airbrakes, and has excellent rudder/stick co-ordination. The NN17-18 aerofoil possesses mild stall characteristics and overall, the handling conveys a strong sense of stability and security to the pilot. 

Specification and Performance

Elf XM Motorglider

Empty Weight

135kg

Max Take-Off Weight

250kg

Minimum Pilot Weight

55kg

Never Exceed Speed VNE

95mph

Manoeuvring Speed VA

68mph

Stall Speed -6º Flap

38mph

+15º Flap

34mph

Climb Rate -6º Flap

640' min @ 56mph

+15º Flap

590' min @ 51mph

Min Sink Rate

216 ft/min (1.1ms) @47mph

Glide Ratio

21:1 @ 54mph

Fuel Consumption, Cruise

4.5 ltr/hr

Fuel Tank Capacity

15 litres + 2 litres reserve

Note: Elf XS performance to be confirmed after full evaluation.


Estimated cruise ± 80mph @ ± 5 ltr/hr

Transport and Assembly 

The Elf can be transported in its custom trailer and is a two-man 15-20 mins assembly. Controls
are self-locking and each wing has two mainspar, and one rear spar pin. Tailplane attachment is
by two bolts and a control horn bolt and nut. 

A special tool is supplied for pin extraction during disassembly. 

Operation 

If unloaded from a trailer, the Elf requires two-man assembly. If hangered, the Elf is a one-man arrive-and-fly aircraft which can be taxied out to take-off. 


                              


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