/ Dornier Do-28
The type designation Dornier Do 28 comprises two different twin-engine STOL utility aircraft, manufactured by Dornier Flugzeugbau GmbH.
Most of them served with the German Air Force and Marineflieger and other air forces around the world in the communications and utility role.
Dornier Do 28 A/B/C
Prototype, first flew 29 April 1959 with two 180 hp (130 kW) Lycoming O-360-A1A engines and fixed pitch two-blade propellers.
Designation of production aircraft with 250 hp (190 kW) Lycoming O-540-A1A engines and a 7 ft increase in wingspan.
First flown on 20 March 1960 at Oberpfaffenhofen.
One aircraft was used for the personal transport of the German Defense Minister, Franz Josef Strauss.
Floatplane conversion of the Do 28A-1 by the Jobmaster Company of Seattle, Washington, United States.
Do 28A with enlarged nose, additional fuel tanks, increased tailplane area and powered by 290 hp (220 kW) Lycoming IO-540 fuel injected engines and three-blade constant speed propellers.
Proposed floatplane conversion of the Do 28B-1 by the Jobmaster Company of Seattle, Washington, USA.
Variant with turbocharged Lycoming TIO-540 engines.
Designation of a proposed eight-seat version with two 530 shp turboprops but this design was not pursued.
Dornier Do 28 D Skyservant and derivatives
Redesigned aircraft with box fuselage, larger wing, new tail and two 380 hp (280 kW) IGSO-540 engines.
Production version of the Do 28D, with 0.5 m (1 ft 7½ in) greater wingspan and higher gross weight.
Dornier Do 28 D-2
Increased maximum take-off weight, strengthened fuselage with enlarged cabin, 172 built.
Do 28D modified as a pollution patrol aircraft
In 1980 one German Air Force Do 28D-2 aircraft was fitted with two Avco Lycoming TIGO-540 turbocharged engines.
Do 28D-5X Turbo Skyservant
Prototype version powered by Lycoming LTP-101-600 turboprops rated at 298 kW (400 shp) each.
One built, first flying on 9 April 1978.
Do 28D-6X Turbo Skyservant
Prototype version powered by PT6A-110 turboprops, also rated at 298 kW (400 shp) each.
One built, first flying on 4 March 1980 later redesignated Dornier 128-6.
A Do 28D fitted with a new, high technology wing of 19.97 m (55 ft 8 in) span for trials, powered by two 533 kW (715 shp) Garrett TPE331-5-252D mounted on the wing, first flown on 14 June 1979.
Wing later used in the Dornier 228.
Do 28 G.92
1995 conversion of Do 28D powered by two Walter M601-D2 750 hp turboprops used for skydiving operations.
Improved version of Do 28D-2, replaced D-2 in 1980.
Production version of the Turbo Skyservant
1 or 2
12 or 13 passengers
11.41 m (37 ft 5 in)
15.55 m (51 ft 0 in)
3.90 m (12 ft 10 in)
29.00 m2 (312.2 sq ft)
2,304 kg (5,079 lb)
Max take-off weight
4,015 kg (8,852 lb)
893 L (236 US gal; 196 imp gal)
2 × Lycoming IGSO-540-A1E air-cooled flat-six engines, 280 kW (380 hp) each
3-bladed Hartzell constant-speed propellers
325 km/h (202 mph, 175 kn) at 3,000 m (10,000 ft)
241 km/h (150 mph, 130 kn) at 10,000 ft (3,000 m) (econ cruise, 50% power)
104 km/h (65 mph, 56 kn) (power off, flaps down)
Minimum control speed
65 km/h (40 mph, 35 kn) (power on, flaps down)
2,950 km (1,830 mi, 1,590 nmi) (with max fuel)
7,680 m (25,200 ft)
Rate of climb
5.3 m/s (1,050 ft/min).
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