Beagle Pup

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B.121 Pup
Beagle pup g-axia arp.jpg
Manufacturer Beagle Aircraft Limited
First flight 8 April 1967
Introduction 1968
Produced 1967–1970
Number built 176
Variants Beagle Bulldog

The Beagle B.121 Pup is a 1960s British 2–4 seat single-engined training and touring aircraft built by Beagle Aircraft Limited at Shoreham Airport and Rearsby Aerodrome.


The Pup was designed as a single-engined all-metal two-seat aerobatic aircraft or a four-seat touring aircraft. The prototype Pup (a Series 1 G-AVDF) first flew from Shoreham Airport on 8 April 1967. Soon after, more powerful Pup 150s, with seating for an extra adult, were flow in October 1967.[1] The second (G-AVLM) and third (G-AVLN) aircraft were Series 2 aircraft fitted with an enlarged rudder which became standard on all production aircraft. G-AVLM was converted during 1968 to become the series 3 prototype aircraft with a further enlarged rudder.

Beagle Aircraft Ltd chose to build the Pup following a market survey which demonstrated a global requirement for a 2–4 seat training/touring aircraft to replace aging Tiger Moths and Pipers used by flying clubs.[2]

Pup Series 2 with a 150 h.p. engine at Sydney Airport in October 1970

The first delivery (a Series 1) was to the Shoreham Flying School on 12 April 1968. The aircraft was popular and sold to flying clubs and private users worldwide. A Series 3 variant, a four-seater, was developed for the Iranian Civil Air Training Organisation. By 1969 production had increased at Shoreham to one Pup a day, aircraft were flown to either Rearsby Aerodrome or Cambridge Airport for painting and finishing. One aircraft was evaluated by the Royal New Zealand Air Force in 1969, but was not ordered. Deliveries were made to civilian operators in several countries including Australia, Sweden and Switzerland.

In December 1969 the government withdrew financial support for Beagle and the company was placed in receivership. Over 250 Pups were on order but production ceased with the 152nd aircraft. Some remaining nearly completed aircraft were finished at a variety of locations, the last being completed G-BCGV (s/n B121-176) was first registered 17 June 1974.

The Pup was more spacious than its direct competitors and was more of a "pilot's aeroplane"; it was a more complex design to manufacture and was also corrosion proofed throughout (usually then only an option on US-built competitors). For these reasons it was correspondingly more expensive to build, yet was sold at a competitive price. Its maintenance requires more care (i.e. expense) and its early days were troubled by issues with the doors and spares availability.

A military version of the Pup was developed after being assessed by Rolls Royce Test Pilot Graham Andrews, who made 12 recommendations including its adaptation to a twin seated aircraft suitable for training purposes. The aircraft evolved into the Beagle B.125 Bulldog with a 200 hp (150 kW) Lycoming engine. Only one prototype aircraft was built by Beagle (with another largely complete) before it ceased operations; the design and production was taken over by Scottish Aviation.


Pup Series 1 (Pup 100)
Powered by a 100 hp (75 kW) Rolls-Royce Continental O-200A engine
Pup Series 2 (Pup 150)
Powered by a 150 hp (110 kW) Lycoming O-320-A2B engine
Pup Series 3 (Pup 160)
Powered by a 160 hp (120 kW) Lycoming O-320-D2C engine
Military training version, 2 prototypes only built by Beagle


Civil operators[edit]

  • Iranian Civil Air Training Organisation
 United Kingdom

Military operators[edit]

 New Zealand
  • One aircraft evaluated by the RNZAF in 1969, not ordered.

Specifications (Pup Series 1)[edit]

General characteristics


Specifications (Pup Series 2)[edit]

Data from Jane's All the World's Aircraft 1969–70[3]

General characteristics

  • Crew: 1
  • Capacity: 2 passengers
  • Length: 23 ft 2 in (7.06 m)
  • Wingspan: 31 ft 0 in (9.45 m)
  • Height: 7 ft 6 in (2.29 m)
  • Wing area: 119.5 sq ft (11.10 m2)
  • Aspect ratio: 8.04:1
  • Empty weight: 1,090 lb (494 kg)
  • Max takeoff weight: 1,925 lb (873 kg)
  • Fuel capacity: 24 imp gal (29 US gal; 110 L)
  • Powerplant: 1 × Lycoming O-320-A2B air-cooled flat-four, 150 hp (110 kW)
  • Propellers: 2-bladed Sensenich M.74 DMS-0-60, 6 ft 2 in (1.88 m) diameter


  • Maximum speed: 138 mph (222 km/h; 120 kn)
  • Cruise speed: 115 mph (185 km/h; 100 kn) (econ cruise, 55% power)
  • Stall speed: 56 mph (90 km/h; 49 kn) (flaps down)
  • Never exceed speed: 195 mph (314 km/h; 169 kn)
  • Range: 440 mi (382 nmi; 708 km)
  • Service ceiling: 14,700 ft (4,500 m)
  • Rate of climb: 800 ft/min (4.1 m/s)
  • Wing loading: 16.1 lb/sq ft (79 kg/m2)
  • Take-off run (to 50 ft (15 m): 1,480 feet (450 m)
  • Landing run (from 50 ft (15 m): 1,410 ft (430 m)

See also[edit]


  1. ^ Frawley, Gerard (1997). The International Directory of Civil Aircraft. Australia: Aerospace Publications Pty Ltd. p. 37. ISBN 1-875671-26-9.
  2. ^ Carr, Richard: Pup, up and away, Article 11, pages 44–47. Design Journal, 01/11/1968 – VADS Archived 17 July 2011 at the Wayback Machine
  3. ^ Taylor 1969, pp. 193–194.
  • Taylor, John W. R., ed. (1969). Jane's All the World's Aircraft 1969–70. London: Sampson Low Marston & Co. Ltd.

Further reading[edit]

  • The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985). Orbis Publishing.
  • Jackson, A.J. (1974). British Civil Aircraft since 1919 Volume 1. London: Putnam. ISBN 0-370-10006-9.

External links[edit]

Media related to Beagle B.121 Pup at Wikimedia Commons