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Ultralight sailplane
AL-12
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Currently among the proponents of soaring flight
there is more and more discussion of the idea of a sailplane that
could have some of the positive features of hang gliders and rigid
wing gliders.
The possibility of soaring flight while using narrow thermals
and "microlift", to takeoff from hang gliding sites, and to have
the simplicity of quick rigging and ease of transportation as
well as low cost of the aircraft is something that many soaring
pilots have stated a desire for.
At the same time it is desirable for this aircraft to have great
aerodynamic performance - especially with it's glide ratio, wonderful
controllability, good stall and spin characteristics, as well
as provide for a higher comfort during flight, which should enable
longer soaring flights without tiring as quickly.
The NEW sailplane offered by Aeros is produced according to a
classical diagram. The glider takes off by way of air towing or
winch towing. The sailplane's design allows mounting the retractable
launcher for autonomous takeoff and climb. A comfortable cockpit
is equipped with adjustable pedals and seat back that can be adjusted
to the pilot's height up to 195 cm. There is a space for a backpack
parachute. The sailplane can come complete with an optional rescue
system.
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For transportation purposes all control and stabilizing surfaces
are removed, the cabin is detached, the wing with the tail beam
is put into a package 0,2 0,58 5,7 m. The 0,6 0,86 3 m cockpit
can be transported either as a whole assembly or in parts (cockpit,
fuselage spine fairing, cockpit enclosure). For rigging the sailplane
you will need around 40 minutes. |
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Take-off |
In flying
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Towage |
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AL12M
-Powered version ultralight sailplane
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On October, 8, 2005 the first flight of a powered sailplane AL-12M
with a retractable power-unit took place. The sailplane was piloted
by its chief design engineer and the Aerola company top-pilot
Nikolay Kononenko. The AL-12M has been brought to the take-off
field on a car roof rack. Within an hour and a half the sailplane
was rigged up and prepared for tests.
A flying tests program started with taxiing and trial take-off.
The power-unit based on Solo-210 engine (16 horse-power) provides
for self-taxiing on a field, take-off and acceptable climb rate.
During the first day six flights have been performed. The sailplane
demonstrated excellent stability and controllability. Also in the
air the engine stop and restart as well as the propeller centering
have been checked. The power-unit was fixed in a released position.
An in-flight retraction and extension of the power-unit will soon
be tested.
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T E C H N I C A L D A T A |
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AL-12 |
AL-12M |
Empty
weight |
80 kg |
120
kg |
Max
takeoff weight |
185
kg |
220
kg |
Wing
span |
13,3
m |
13,3
m |
Sail
area |
13 m2 |
13 m2
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Pilot
weight |
60-110
kg |
60-100
kg |
Stall
speed |
34-40
km/h |
39-45
km/h |
Max
airspeed |
140
km/h |
140
km/h |
Best
glide ratio |
27
(at 60 km/h) |
27 (at
65 km/h) |
Min.
sink rate |
0,5-0,6
m/s (at 45 km/h) |
0,7-0,8
m/s (at 45 km/h) |
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