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tional pull of the earth. Five g in a maneuver exerts 5 times the gravitational force of
the earth.
Maneuverability
Aileron Roll The aileron roll is simply a 360 degree roll accomplished by put-
ting in and maintaining coordinated aileron pressure. The maneuver is started slightly
nose high because, as the airplane rolls, its lift vector is no longer countering its
weight, so the nose of the airplane drops significantly during the maneuver. Back
stick pressure is maintained throughout so that even when upside down, positive seat
pressure (about 1 G) will be felt. As the airplane approaches wings-level at the end of
the maneuver, aileron pressure is removed and the roll stops.
Aileron Roll Loop
Loop A loop is simply a 360 degree change in pitch. Because the airplane will
climb several thousand feet during the maneuver, it is started at a relatively high air-
speed and power setting (if these are too low, the airspeed will decay excessively in
the climb and the maneuver will have to be discontinued.) The pilot, once satisfied
with the airspeed and throttle setting, will pull back on the stick until about three Gs
are felt. The nose of the airplane will go up and a steadily increasing climb will be
established. As the maneuver continues, positive G is maintained by continuing to
pull. The airplane continues to increase its pitch until it has pitched through a full cir-
cle. When the world is right-side-up again, the pilot releases the back stick pressure
and returns the aircraft to level flight.
Antonov-70
The Antonov-70 is a new propfan
1
powered medium-size wide-body short
take-off and landing transport aircraft designed a replacement for the An-12 'Cub'.
The An-70 belongs to a new class of short takeoff and landing tactical military trans-
ports.
The An-70 is capable of carrying practically any item from military armament
and equipment nomenclature with a total weight of up to 47 t. The aircraft is capable
of delivering 20-35 t of cargo over the range of 5,000-6,600 km at cruising speed of
750 km/h, air dropping
2
of personnel and vehicles including single cargoes of up to
20 t from both high and low altitudes, deliver}' of 300 soldiers and evacuation of
206 wounded and sick. Depending upon the type of operation and takeoff
weight, the An-70 can be operated on both average-strength hard-surface runways
and unpaved 700-900 rn strips with low surface strength. In case of short takeoff
and landing on 700 m unpaved runways, the An-70 is capable of carrying 20-30 t of
cargo over the range of 1,200-3,000 km. Four D-27 engines with counter-rotating
SV-27 propfans ensure high cruising speed and 20-30% fuel saving in comparison
with modern airplanes with turbojet engines.
1
propfan – тяговый вентилятор
2
dropping
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