Beechcraft Duchess

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American light twin-engined airplane

title: "Beechcraft Duchess" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["beechcraft-aircraft", "1970s-united-states-civil-trainer-aircraft", "low-wing-aircraft", "t-tail-aircraft", "aircraft-first-flown-in-1974", "twin-piston-engined-tractor-aircraft", "aircraft-with-retractable-tricycle-landing-gear"] description: "American light twin-engined airplane" topic_path: "geography/united-states" source: "https://en.wikipedia.org/wiki/Beechcraft_Duchess" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary American light twin-engined airplane ::

::data[format=table title="Infobox aircraft"]

FieldValue
nameModel 76 Duchess
imageFile:N60244 1978 Beech 76 Duchess.jpg
captionA Beech 76 Duchess on final approach
typeFour-seat cabin monoplane
manufacturerBeechcraft
first_flightSeptember 1974
introduction1978
primary_userFlight schools
produced1978-1983
number_built437
developed_fromBeechcraft Sierra
::

|name = Model 76 Duchess |image = File:N60244 1978 Beech 76 Duchess.jpg |caption = A Beech 76 Duchess on final approach |type = Four-seat cabin monoplane |manufacturer = Beechcraft |first_flight = September 1974 |introduction = 1978 |retired = |status = |primary_user = Flight schools |more_users = |produced = 1978-1983 |number_built = 437 |developed_from = Beechcraft Sierra |variants = ::figure[src="https://upload.wikimedia.org/wikipedia/commons/4/44/Beech_76_N6697D_Timm,_Milw,_WI_07.06.06R_edited-2.jpg" caption="US registered 1979 model Duchess"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/8/8e/Beechcraft76DuchessC-GJFE02.jpg" caption="1979 model Duchess"] ::

The Beechcraft Model 76 Duchess is an American twin-engined monoplane built by Beechcraft intended partly as a low cost introduction to twin-engine aircraft.

Development

Developed as Model PD289 (Preliminary Design 289), the prototype was unveiled on November 4, 1974, although it had first flown in September 1974. The Model 76 was designed as an economical twin-engine trainer for the Beech Aero Centers and to compete with the similar Gulfstream Cougar as well as the Cessna 310.

The first production version flew on 24 May 1977, and the name "Duchess" was chosen through a company competition. Construction of the Duchess was set for a new factory built at the Liberal Division, with deliveries beginning early in 1978.

Production of the Duchess continued until 1983, with no significant changes. A single example was tested with turbocharged engines in 1979, but did not proceed to production.

Design

The Duchess is an all-metal low-wing monoplane with retractable tricycle landing gear and a T-tail. It seats four. The design used components and the bonded wing construction from Beechcraft's single-engined Musketeer line. The basic fuselage and wing structure was adapted from the Model 24 Sierra, a Musketeer variant with retractable landing gear, but the Sierra wing spar was redesigned to support the added weight of the engines. Nose landing gear from the A36 Bonanza was used.

The Model 76 incorporates right and left "handed" Lycoming O-360 engines that rotate in opposing directions to eliminate the critical engine during single engine operation.

In 1979, a single example was converted to test the turbocharged versions of the engine. The cowlings were reshaped and the exhaust moved to accommodate the aft-mounted turbochargers.

The Duchess wing is of aluminum honeycomb construction fastened by bonding, rather than rivets, to reduce cost and produce a smoother aerodynamic surface.

T-tail

The use of a T-tail on the Model 76 met with mixed critical reception when the aircraft was introduced. Plane & Pilot pronounced: "Outstanding design characteristics of the new Duchess include an aerodynamically advantageous T-tail, which places the horizontal surfaces above the propeller slipstream for better stability and handling.", while Gerald Foster said: "[Beechcraft's] interest in T-tails was perhaps an affectation triggered by their wide use on jet airliners". AVweb wrote that Beechcraft adopted the T-tail after flight tests revealed that the initially used conventional horizontal stabilizer was too small and suffered from buffeting problems, increasing noise and vibration during flight; moving the horizontal stabilizer out of the propeller slipstream eliminated the buffeting and the need for enlargement while adding only 15 lb of weight. Additionally, the T-tail design moved the stabilizer rearward, increasing its effectiveness and giving the aircraft a broader center of gravity range. The later Piper Seminole also adopted a T-tail.

Variants

;Model 76 Duchess :Four-seat, twin-engine (Lycoming O-360), low-winged trainer with bonded aluminum construction. ;Model 76TC Duchess :Unofficial designation for single test aircraft using turbocharged Lycoming O-360.

Operators

The aircraft remains popular with flight training schools.

Specifications

::figure[src="https://upload.wikimedia.org/wikipedia/commons/0/08/Beechcraft_76_Duchess_3-view_line_drawing.png" caption="3-view line drawing of the Beechcraft 76 Duchess"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/d/de/Beechcraft_76_Duchess_C-FDMO_instrument_panel_01.JPG" caption="1976 model Duchess instrument panel"] ::

|ref=Jane's All The World's Aircraft 1980–81. |prime units?=kts General characteristics

|genhide=

|crew=1 |capacity=3 passengers |length sigfig=3 |length m= |length ft=29 |length in=0+1/2 |span m= |span ft=38 |span in=0 |height m= |height ft=9 |height in=6 |wing area sqm= |wing area sqft=181 |airfoil=NACA 632A415 |aspect ratio=7.973:1 |empty weight kg= |empty weight lb=2460 |gross weight kg= |max takeoff weight lb=3900 |fuel capacity=100 USgal Powerplant

|eng1 number=2 |eng1 name= Lycoming O-360-A1G6D |eng1 type=air-cooled flat-four engines |eng1 kw= |eng1 hp=180

|prop blade number=2 |prop name=Hartzell HC-M2YR-2C(L)EUF/F(J)C 7666A constant speed propellers |prop dia m= |prop dia ft= |prop dia in=

Performance

|perfhide=

|max speed kmh= |max speed mph= |max speed kts= |max speed mach= |never exceed speed kts=171 |cruise speed kmh= |cruise speed mph= |cruise speed kts=158 |cruise speed note=at 10000 ft |stall speed kts=60 |stall speed note=power off, flaps down, IAS |range km= |range miles= |range nmi=780 |range note=at 12000 ft, econ cruise |ceiling m= |ceiling ft=19650 |climb rate ms= |climb rate ftmin=1248 |more performance=

|avionics=

References

References

  1. Green, William: ''Observers Aircraft'', page 48. Frederick Warne Publishing, 1980. {{ISBN. 0-7232-1604-5
  2. (February 5, 2008). "What Happened to the Piston Twin?". Bonnier Corporation.
  3. (1982). "The History of Beech: Fifty Years of Excellence". McCormick-Armstrong Co..
  4. (8 June 2017). "The "Baby Beechcraft" - Part Two". KingAir Magazine.
  5. (20 December 1976). "To provide increased final assembly facilities". Aviation Week & Space Technology.
  6. (18 February 1985). "Beech Plans to Close Plant at Liberal, Kan.". Aviation Week & Space Technology.
  7. Frawley, Gerard. (2003). "The International Directory of Civil Aircraft, 2003-2004". Aerospace Publications Pty Ltd.
  8. (1992). "Beechcraft: Pursuit of Perfection". Flying Books.
  9. . (5 August 2005). ["Beechcraft Duchess"](https://www.avweb.com/features/beechcraft-duchess/).
  10. Plane and Pilot: ''1978 Aircraft Directory'', page 84. Werner & Werner Corp, Santa Monica CA, 1977. {{ISBN. 0-918312-00-0
  11. Montgomery, MR & Gerald Foster: ''A Field Guide to Airplanes, Second Edition'', page 92. Houghton Mifflin Company, 1992. {{ISBN. 0-395-62888-1
  12. (2007). "The Light Airplane Pilot's Guide to Stall/spin Awareness: Featuring the PARE Spin Recovery Checklsit". Rich Stowell, Master CFI-A.
  13. "Beech 76A Duchess".
  14. "Army Instrumentation Facility: Airborne Laboratory Atmospheric Research (ALAR)".
  15. "Rutan Voyager".
  16. "Scaled Composites: SpaceShipOne".
  17. Taylor 1980, pp. 268–269.

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

beechcraft-aircraft1970s-united-states-civil-trainer-aircraftlow-wing-aircraftt-tail-aircraftaircraft-first-flown-in-1974twin-piston-engined-tractor-aircraftaircraft-with-retractable-tricycle-landing-gear