Dornier Do 28 A/B

Dornier Do 28 A-1, G-ASUR, right side, parked on grass
Do 28 A-1 c/n 3051, G-ASUR (N123CA)

Introduction

Dornier Do 28 is a family of twin-engine light utility aeroplanes from Dornier Flugzeugwerk. Substantially based on their relatively popular single-engine Do 27, the Do 28 A-1 with two 250HP Lycoming O-540 engines, first flew on the 20th of March 1960. Having generally good flight characteristics except for poor single-engine performance, Do 28 A was developed three years later into the Do 28 B, with two 290HP IO-540 engines, three-bladed propellers, larger tail, and redesigned nose. The Do 28 B was followed by an entirely new and larger design, only superficially similar to the previous models: the Do 28 D. All three types had good "short take-off and landing" (STOL) capabilities. This page focuses on the Do 28 A.

Do 28 A-1Do 28 B-1Do 28 DDo 27
Length (m)9.29.011.49.6
Height (m)2.82.83.93.5
Wing span (m)13.813.815.512.0
Wing Area (m2)22.422.429.019.4
Empty Weight (kg)1670172522381050-1100
Take-off Weight (kg)2450267040151570-1850
Max Speed (km/h)280302250-296
Cruise Speed (km/h)250280272215-250
Landing Speed (km/h)8585
Service Ceiling (m)5900630076803600-5600
Range (km)1150178028751100-1360
Take-off distance (m)310272546260-140
Landing distance (m) 210225530165-290
Seats (crew + pax)2 + 62 + 62 + 124/6/8

Identification

All models have a high-mounted wing without struts and two engines unusually arranged on stub wings at the bottom of the fuselage with the fixed main landing gear underneath. The A model can be distinguished from the B model by larger, more prominent exhaust outlets, two-bladed propellers, nose profile, and landing light in the wing tip.

Do 28 A recognition features
Do 28 A-1 D-ILPB (painted as CA+041), Dornier Museum. (image source)

The B model had smaller, more streamlined exhaust outlets, three-bladed propellers, and landing light in the nose.

Do 28 D recognition features
Do 28 B-1 10013 (image source)

The D model is larger and more angular. The engine nacelles and fuselage are almost rectangular in cross-section, whereas they are oval in the A and B models.

Do 28 D recognition features
Do 28 D 58+85 (image source)

History and uses

The type's good STOL characteristics meant that it was often used to transport passengers or cargo to small, unimproved 'bush' airstrips. As well as official military operations, the type was used by Air America and Bird & Sons, both CIA front companies, in south-east Asia before and during the Viet Nam war. Even more notoriously, five examples were used by the short-lived Katangese Air Force. At least one was used for missionary work in the Pacific. The type was also used for air taxi work by such operators as Deutsche Taxiflug (D-IBAG) which later merged with Deutsche Nahluft to become Air Lloyd (operating D-IHUL). The type was also used by FINA (PetroFina) in Canada, Rosenthal China, and the French Customs service.

Flight reports

Certification

RUAG Aerospace currently hold the type certificate, A.360 for all Do 28 models and Do 128. The US FAA has corresponding type certificate 7A13. RUAG also hold the type certificate for the Do 228 which they have developed into the Do 224NG.

An Airworthiness Directive list can be downloaded from the LBA (Luftfahrt-Bundesamt, German aviation authority), but it seems like the actual ADs are not available electronically.

Engine

All piston-powered versions of the Do 28 (A, B and D) used a version of Lycoming's 6 cylinder O-540 (horizontally opposed, 540 cubic inch) family of engines.

Do 28 A-1Do 28 B-1Do 28 D-1 & -2
TypeO-540-A1DIO-540-A1A5IGSO-540-A1E
Power (HP)250 @ 2575 rpm290 @ 2575 rpm380 @ 3200rpm
Fuel deliverycarburettorfuel injectionfuel injection
Air deliverynaturally aspiratednaturally aspiratedsupercharged
Propeller Drivedirectdirectgeared (77:120)

Books

Airframes by Number

Sixty series Do 28 A-1 were built, numbered 3001 to 3060. Sixty subsequent Do 28 B were numbered 3061 to 3120.

Constr. nbrRegistrationNotesFate
3000PT-IIP (Do 28 A prototype, Brazil)Cert of Airworthiness expired 1979.
3004D-IHULwritten off 1972
3005OY-AIWPicture: after crashwritten off 27-JUL-1960
3007SE-CONwritten off 1963
3009D-IBYDwritten off 1973
3010D-IATA
3011N2001F
3023N12828
3024D-IDTFOperated by Air Lloyd, crashed and repaired, Germany, 10-SEP-1963
3025D-ICTFOperated by Air Lloyd.written off 13-oct-1964
3027N2002F
3030EC-BNHwritten off 11-jan-1975
3034N96155written off 20-jun-1977. Hit trees on go-around
3044PJ-ADIwritten off 17-may-1971
3047F-OCBR
3048D-IBEWOperated by Air Lloyd. Lost in mid-air collision with Lockheed Starfighter DA+103written off 02-jun-1965
3049ST-ACM written off 01-jan-1970
3050D-IBEX, CS-AIO, N20LP Owned by me. In storage, complete but not airworthy, Auckland, NZ.
3051D-IBOM, G-ASUR, N123CAOne of the few flying examples left. Lives at Shuttleworth, UK.
3056HB-LCKwritten off 02-jun-1979
3058XW-PCTwritten off 24-mar-1976
3059HS-CHIwritten off 22-oct-1979

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