Fokker F27 Friendship

Fokker F27 Friendship
US Army · Public domain · source
Name	Fokker F27 Friendship
Type	Regional airliner / Transport
Manufacturer	Fokker
First flight	24 November 1955
Produced	1955–1987
Number built	581

Fokker F27 Friendship The Fokker F27 Friendship is a twin-engined, high-wing turboprop regional airliner developed by Fokker in the 1950s as a successor to piston-engined designs. It combined advances in Rolls-Royce Dart turboprop power, modern aerodynamics influenced by De Havilland research, and manufacturing techniques used across Netherlands aerospace to meet demand from carriers such as KLM and Aero Holland. The type entered service during the jet age alongside aircraft like the Boeing 707 and Douglas DC-3, yet established a long career in regional and military roles worldwide.

Development and Design

Development began after Fokker evaluated postwar market needs and consulted operators including KLM and British European Airways. Design led by chief engineer Wim van der Horst (company engineers included alumni from Lockheed and de Havilland), adopted a high-mounted wing, full-span flaps and a fuselage cross-section inspired by research at National Advisory Committee for Aeronautics predecessors and European wind tunnel work at NLR. Powerplants were licensed Rolls-Royce Dart turboprops, benefits being reliability demonstrated on types such as the Vickers Viscount. Structural techniques incorporated aluminium alloys used by Messerschmitt survivors and avionics from suppliers linked to Honeywell and Collins Aerospace precursors. The Friendship featured a pressurised cabin, large cargo doors reflecting civil operators like KLM and military transporters like Royal Netherlands Air Force, and noise/efficiency improvements compared with contemporaries like the Ilyushin Il-12.

Variants

Multiple versions addressed civil and military markets: the early F27-100 and F27-200 series tailored for short-haul carriers including Austrian Airlines and Aer Lingus; later stretched and updated models such as the F27-300 series ordered by Garuda Indonesia and Air France regional divisions. Military and special-purpose conversions included maritime patrol versions used by Royal Australian Air Force, VIP transports for Royal Air Force and feeder freighter conversions for cargo operators like FedEx precursor contractors. License-built and derivative manufacturing involved Fairchild with the FH-227, collaborations touching companies like Short Brothers and maintenance networks linked to SABENA and Cimber Airlines. Modernisation programs integrated avionics suites from Garmin-linked firms and engine overhaul packages by MTU Aero Engines and Pratt & Whitney affiliates.

Operational History

The Fokker F27 entered service during an era where carriers such as KLM, Austrian Airlines, Aerolíneas Argentinas, Ansett Airlines of Australia, and Eastern Air Lines sought reliable regional types. Its range and field performance made it popular in diverse theaters: Arctic operations near Svalbard, tropical networks in Indonesia, and rugged routes in Nepal and Ecuador. Military operators included the Royal Netherlands Air Force, Royal Australian Air Force, and Royal New Zealand Air Force, deploying the type for troop transport, medevac and maritime surveillance alongside aircraft like the Lockheed P-3 Orion. The FH-227 variant served US commuter airlines and regional carriers under regulatory frameworks influenced by International Civil Aviation Organization standards and bilateral agreements with agencies such as Federal Aviation Administration.

Operators

Civil and military operators spanned continents: European carriers such as KLM, Austrian Airlines, Aer Lingus, SAS (Scandinavian Airlines), and British European Airways; Asian operators including Garuda Indonesia, Japan Air Lines feeder services, Philippine Airlines affiliates; African carriers like South African Airways and Kenya Airways predecessors; Oceania users including Ansett Airlines of Australia and Air New Zealand regional wings; North and South American operators across the United States, Mexico, Brazil and Argentina. Armed forces and government operators included the Royal Netherlands Air Force, Royal Australian Air Force, Royal New Zealand Air Force, Indian Air Force and maritime agencies in Norway and Canada.

Accidents and Incidents

Like many types in long service, the Friendship experienced incidents involving operators such as Aerolíneas Argentinas, Avianca predecessors, and regional US carriers. Investigations by authorities including Dutch Safety Board-equivalents and the Federal Aviation Administration often cited factors familiar in aviation accident reports alongside lessons implemented across fleets. Notable investigations referenced procedures from International Civil Aviation Organization Annexes and led to airworthiness directives issued by EASA successor organisations and national civil aviation authorities.

Technical Specifications

The F27 featured twin Rolls-Royce Dart turboprops driving four-blade propellers, a high-mounted wing with double-slotted flaps, and a fuselage cross-section accommodating up to 52 passengers in typical layouts used by KLM and Austrian Airlines. Systems integrated hydraulic actuation similar to designs found on De Havilland types, avionics packages evolving toward equipment from suppliers associated with Honeywell, Collins Aerospace, and later retrofits by Garmin. Performance parameters—cruise speed, range, payload—placed it between contemporaries such as the Handley Page Herald and successors like the ATR 42 and Bombardier Dash 8 families developed by ATR and de Havilland Canada.

Legacy and Impact

The Fokker F27 influenced regional transport design, prompting license production and derivative projects like the Fairchild FH-227 and informing later designs by Fokker such as the F28 Fellowship; it also shaped route development for carriers including KLM and Garuda Indonesia and supported military logistics for nations including Australia and Netherlands. Its widespread use fostered global maintenance and training networks tied to organisations such as IATA and shaped regulatory experience for authorities including FAA and EASA-line agencies. The type remains part of aviation heritage collections in museums associated with Aviodrome and other aerospace institutions.

Category:Fokker aircraft