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FAF EFW N-20 Arbalete (Crossbow)


Jet-Powered Research and Development Aircraft (1951)


Aviation / Aerospace

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Image from the Public Domain.

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The EFW N-20.02 Crossbow was an outgrowth of the N-20 program which sought a locally-designed and developed jet fighter for the Swiss Air Force.



Authored By: Staff Writer | Last Edited: 04/18/2016 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.
The EFW N-20 "Arbalete" ("Crossbow") was born as an off-shoot to the EFW N-20 program, an indigenous initiative on the part of the Swiss government to field a homegrown jet-powered fighter. The program produced a wooden glider for testing as the N-20.01 and the N-20.10 full-scale aircraft. While not adopted for formal service by the Swiss Air Force, the program provided excellent experience for engineers and local industry. The N-20.02 existed as another test aircraft in the series, being dimensionally similar to the N-20.01 glider.

The glider form proved the overall design and configuration of the aircraft sound, one that envision a central fuselage containing the pilot, cockpit, avionics and fuel. The fuselage was straddled by a swept-back wing unit of particularly thick chord. A tricycle undercarriage was used that was retractable. The cockpit, covered over in a large transparent canopy for excellent vision, was set well forward in the fuselage.

The N-20.01 glider went airborne (by way of tug aircraft) on April 17th, 1948. This laid the foundation for the N-20.02 with the major difference being installation of 4 x Turbomeca Pimene I turbojets of 242ln thrust. The engines were set in individual nacelles along the mainplane trailing edges, each pairing in an over-under configuration. Altogether, the engines were of low thrust and did not provide the necessary power to achieve high speed envelopes but proved suitable for the data collection needed to advance the program.

At the time of its completion, the N-20.02 marked the first-ever Swiss jet-powered aircraft.

This test article went airborne for the first time on November 16th, 1951 and managed a maximum speed of 354 miles per hour in the sixteen minutes the aircraft was in the air. The results were promising, showcasing an aerodynamically clean form with good maneuverability. 447 miles per hour was later achieved in a diving action.

The N-20 project was eventually terminated by the Swiss government which led to development of the FFA P-16 (detailed elsewhere on this site). However, this too was cancelled and the Swiss Air Force relied on a foreign solution to its jet fighter force, the British Hawker Hunter. The Arbalete endured in research for a few years longer, being given up for good in 1954.

The full-sized N-20 "Aiguillon" managed some ground running and a few "hops" but little else - doomed by its underpowered engine arrangement and politics.

Specifications



Service Year
1951

Origin
Switzerland national flag graphic
Switzerland

Crew
1

Production
1
UNITS


Eidgenossische Flugzeugwerke (EFW) Switzerland
National flag of Switzerland Switzerland (cancelled)
(OPERATORS list includes past, present, and future operators when applicable)
X-Plane (Developmental, Prototype, Technology Demonstrator)
Aircraft developed for the role of prototyping, technology demonstration, or research / data collection.


Length
24.7 ft
(7.53 m)
Width/Span
24.8 ft
(7.55 m)
Height
10.2 ft
(3.12 m)
Empty Wgt
3,307 lb
(1,500 kg)
MTOW
4,409 lb
(2,000 kg)
Wgt Diff
+1,102 lb
(+500 kg)
(Showcased structural values pertain to the FAF EFW N-20.02 production variant)
Installed: 4 x Turbomeca Pimene I turbojet engines developing 242lb of thrust each.
Max Speed
354 mph
(570 kph | 308 kts)
Ceiling
26,247 ft
(8,000 m | 5 mi)
Range
249 mi
(400 km | 741 nm)


♦ MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030


(Showcased performance specifications pertain to the FAF EFW N-20.02 production variant. Compare this aircraft entry against any other in our database. View aircraft by powerplant type)
None.


N-20.02 "Arbalete" - Base Series Designation; one aircraft completed for testing.


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