SpecificationsEF_Large

  • Span 17.0 m./ 55.77 ft
  • Area 17.95 sq. m. / 193.21 sq.ft.
  • Aspect ratio 16.1
  • Airfoil Wortmann FX-S02-196 ,
  • Empty weight 360 kg. / 794 lb.
  • Payload 240 kg. / 529 lb.
  • Gross weight 600 kg. / 1,323 lb.
  • Wing loading 33.4 kg. / sq. m. / 6.84 lb. / sq. ft.
  • Structure fiberglass and foam wing, fiberglass honeycomb sandwich fuselage and tail.

Performance

  • L/D max. 35 85 kph / 46 kt / 53 mph
  • Min. sink 0.65 m/s / 2.13 fps / 1.26 kt
  • 67 kph / 36 kt / 42 mph

Other

  • Country of origin Germany
  • Designer Rudolf Kaiser
  • No. of seats 2
  • No. in the U.S. ~35

Schleicher ASK21

The ASK 21 is a two-seater mid-wing with T-tail. This aircraft stands out particularly by its wide range of flying tasks. The ASK 21 accompanies the student pilot from instruction up to the first cross-country or competition flights.

N421EF Library ( 7 Documents )

N421EF Originating Factory Documents and TBO
 460.08 KB
 Last Updated Date: 04-24-2018

N421EF Registration
 35.24 KB
 Last Updated Date: 04-24-2018

Registration certificate. Always consult the aircraft documentation for current certificate. 

N421EF Pickup from Bozeman, MT
 731.44 KB
 Last Updated Date: 11-29-2018

Pickup of 85F, in June 2014, from Bozeman Montana by Peter Baur, Scott Westfall, John Seaborn and Brody.

ASK21 AD - Notes and Technical Notes
 338.76 KB
 Last Updated Date: 11-29-2018

Airworthiness directives and technical notes related to the ASK21.

ASK21 Brochure
 310.73 KB
 Last Updated Date: 11-29-2018

Sales brochure

ASK21 Impressions
 220.6 KB
 Last Updated Date: 04-24-2018

Bill Daniels gives his impressions on the ASK21.

ASK21 Instructions for Continued Airworthiness
 Last Updated Date: 04-24-2018

ASK21 Preflight
 891.85 KB
 Last Updated Date: 11-29-2018

ASK21 Repair Manual.pdf
 Last Updated Date: 04-24-2018

ASK21 TSA Spirals
 274.72 KB
 Last Updated Date: 11-29-2018

From our friends at the TSA, flying the ASK21.

N421EF Flight Manual Supplemental for Spin Weights.pdf
 Last Updated Date: 04-24-2018

N421EF Flight Manual
 6.39 MB
 Last Updated Date: 02-09-2021

N421EF Original Wt and Bal in KG
 443.03 KB
 Last Updated Date: 11-29-2018

Weight and balance numbers for you European types.

N421EF Original Wt and Bal in LBs
 393.55 KB
 Last Updated Date: 11-29-2018

The human understandable numbers

N421EF Weight & Balance
 1.98 MB
 Last Updated Date: 10-01-2025

A weight and balance was performed o n glider N421EF, an Alexander Schleicher ASK 21
S/N 21905. Attached are the worksheet and relevant page of TCDS G47EU.
Empty Weight.: 862 pounds
Position o f CG: 29.8 inches aft of leading edge datum

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