Alexander Schleichers
ASK 21Mi
Simply autonomous.
Overview
Target
Concept
Technical Data
Power-Plant
Airframe
Features
Target
• Self launching double seater, easy to handle on ground and in
the air
• Flight training with instructor and student on their own,
requiring no further personal
• Training ranging from basic training to cross-country
• Aiming for clubs as well as for flight schools
• Ratings for retractable engines in a double seater
• Making the ASK 21 workhorse more attractive for cross-country
flights and maybe for private owners
Concept
ASK 21 Mi
• Abandon Aerobatic Category in exchange higher masses
• Insert well-proven fuel injected
power-plant of the ASH 25Mi
• Lightweight design in tailcone
and tail fins for c.g.
• Reinforced cockpit for crashrequirements
Technical Data
Basic Data
(may be subject to change)
Variant
ASK 21Mi
ASK 21
Category
Utility
Aerobatic
approx. 500kg
approx. 375kg
Max. Take-off Mass
705kg
600kg
Max. non lifting components
510kg
410kg
approx. 200kg
approx. 220kg
280km/h
280km/h
C.G. Range
234 – 469mm
234 – 469mm
Wing loading
33 - 39kg/m²
26 - 33kg/m²
Empty Mass (average equipment)
Useful Load
VNE
Technical Data
Data related to Powered Flight
Power (Start)
(preliminary)
37,3kW (50PS)
Take-off roll distance (max. mass, grass)
270m
Take-off distance over 15m (max. mass, grass)
515m
Time to reach 500m GND after take-off
3min
Climb rate (max mass, sea level)
Range (max mass, saw tooth)
Noise (ICAO Appendix 16, Chapter X)
approx. 2,25m/s
approx. 500km
65,1dB(A)
Power-Plant:
Rotary engine
known form ASH 26, ASH 25, ASW 22
• Low vibration level due to complete
balancing of rotating masses
• Low vibration increases fatigue life and
reliability
• Prototype has now 430 starts and
• 70 engine hours in club
• Fuel injection
Whole Power-plant
removable as single unit
Water cooled casing
and air cooled rotor
Airframe
• Aluminium fuel tank (less smell) for 23Ltrs
• External filler, suitable for customary
fuel station nozzles
• Large engine bay for good accessibility
• Carbon fibre horizontal fin and Kevlar
vertical fin
• Wheels at the wing tips
• Large main wheel (380x150-5)
Features: Complete Engine Controls on
both seats
Features: Steerable Nose Wheel
Questions..?
ASG 29