|Swiss Tipsy Nipper at Wroughton, Wiltshire, in July 1992|
|Role||Single-seat sporting monoplane|
|Designer||Ernest Oscar Tips|
|Primary user||private owners|
The Tipsy Nipper T.66 is an aerobatic light aircraft, developed in 1952 by Ernest Oscar Tips of Avions Fairey at Gosselies in Belgium. It was designed to be easy to fly, cheap to buy and cheap to maintain. It was designed for both factory production and homebuild. "Nipper" was the nickname of Ernest Tip's first grandchild.
The first aircraft flew on 12 December 1957, with test pilot Bernard Neefs. It featured an open cockpit and had a length of 4.56 m (15.0 ft), a span of 6.0 m (19.7 ft) and a range of 400 km (249 mi), extendable with tip tanks to 720 km (447 mi).
Design and development
The aircraft has a welded steel tube fuselage and rudder with a wooden and fabric covered wing, tailplane and elevator. It weighs 165 kg without an engine. Early aircraft were equipped with a 40 hp Stamo Volkswagen air-cooled engine with later types using either 40 hp Pollman-Hepu or 45 hp Stark Stamo engines. Production was between 1959 and 1961 with Avions Fairey delivering 59 complete aircraft and 78 kits. Avions Fairey stopped production to make capacity available for F-104G Starfighter assembly for the Belgian Air Force.
During 1962 the rights and a large assortment of uncompleted parts were sold to Cobelavia SA -Compagnie Belge d'Aviation, and they assembled 18 Nippers. The type was renamed as the Cobelavia D-158 Nipper.
In June 1966 the license was sold to Nipper Aircraft Ltd at Castle Donington and new Mk.III aircraft were built for them by Slingsby Sailplanes at Kirkbymoorside. Production was ended by the fire at Slingsby's in late 1968 and the subsequent bankruptcy. Several partly constructed Nippers were transferred to Castle Donington.
- Tipsy Nipper T.66 Mk 1
- First production model, powered by a 30 kW (40 hp) Pollman-Hepu engine. Enclosed canopy.
- Tipsy Nipper T.66 Mk 2
- Second production model; as first but powered by a 33.5 kW (45 hp) Stark Stamo engine.
- Nipper Mk III
- Slingsby-built for Nipper Aircraft normally with 1500 cc, 33.5 kW (45 hp) Rollason Ardem Mk X engines, 32 built. Tip tanks optional.
- Cobelavia D-158 Nipper
- Production variant - 18 built 
Data from Simpson 2001, p. 549
- Crew: 1
- Length: 4.5 m (14 ft 9 in)
- Wingspan: 5.99 m (19 ft 8 in)
- Height: 1.88 m (6 ft 2 in)
- Empty weight: 299 kg (659 lb)
- Powerplant: 1 × Stark Starmo 1400A , 34 kW (45 hp)
- Maximum speed: 162 km/h (101 mph; 87 kn)
- Cruising speed: 150 km/h (93 mph; 81 kn)
- Range: 320 km (199 mi; 173 nmi)
- Rate of climb: 3.25 m/s (640 ft/min)
- Ellison, Norman (1971). British Gliders and Sailplanes. London: A & C Black Ltd. ISBN 978-0-7136-1189-2.
- Simpson, Rod (2001). Airlife's World Aircraft. Shrewsbury: Airlife Publishing Ltd. ISBN 1-84037-115-3.
- Taylor, John W R (1966). Jane's All the World's Aircraft 1966-67. London: Sampson Low, Marston &Co. Ltd.