The UL Tulak (Rambler) is a side-by-side, factory-built or kit. There is no kit version for the Piper UL.

The Tulak was certified in 1996 and Piper in 1998. The Tulak was marketed by HB Flugtechnik as Dandy and the UL Piper as the Cubby. German name for the Piper UL being Tandem Tulak.

The Piper UL and TUL-09 Tulak feature a high constant-chord wing braced by V struts, with optional tapered or downturned wingtips. The wings fold back for storage and transportation. A Clark Y wing section, thickness/chord ratio 12.5 per cent, is used. Flying controls are conventional and manual wth a flight-adjustable trim tab in each elevator. Plain flaps are fitted.

The fuselage is fabric-covered metal tube and two-spar wooden wing. The engine cowling is metal, and some composites are used.

The landing gear is tailwheel type, fixed, with a steerable tailwheel; 420×150 mainwheels with bungee suspension and cable-operated brakes. Mainwheel spats optional.

Engine options include 58.8 kW (78.9 hp) or 73.5 kW (98.6 hp) BMW; 58.8 kW (78.9 hp) Verner; 62.5 kW (83.8 hp) Tatra; and 51.5 kW (69.0 hp) Limbach..

In total 55 kits and complete aircraft were built by the end of 2002. The ninth factory-built machine was registered in Poland in 2002. Known sales were in Czech Republic, France, Germany and Poland.

HB Flugtechnik marketed the Piper UL and TUL-09 Tulak as the Dandy and Tulak.

Piper UL / TUL-09 Tulak
Engine: Rotax 503 UL-2V, 37.0 kW (49.6 hp)
Propeller: SportProp three-blade, ground-adjustable pitch, glass fibre
Span: 9.82 m (32 ft 2½ in)
Length: 5.96 m (19 ft 6½ in)
Fuel capacity: 50 litres (13.2 US gallons; 11.0 Imp gallons).
Max cruising speed: 70 kt (130 km/h; 81 mph)

Piper UL
Engine: Rotax 912, 80 hp
Wing span: 9.6 m
Wing area: 13 sq.m
MAUW: 450 kg
Empty weight: 250 kg
Fuel capacity: 50 lt
Max speed: 180 kph
Cruise speed: 160 kph
Minimum speed: 55 kph
Climb rate: 5 m/s
Fuel consumption: 8 lt/hr
Certification: C2
Seats: 2
Price (1998): 58 780 DM

A high-wing, strut-braced monoplane with single tail boom through hub of pusher prop. Pod-type pilot module. 3-axis controls.

Engine: Rotax 277.
Wingspan 30ft
Wing area 150 sq.ft
Empty weight 251 lb
Gross weight 525 lb
Cruise speed 52 mph
Stall speed 27 mph
Vmax 60 mph
Climb rate 375 fpm

Centre mounted joy stick, rudder pedals, nosewheel steerable through rudder pedals.
Construction: Aluminium, Dacron.

Engine: Cuyuna ULII-02 (429cc) 35hp.
Static thrust: 225 lbs.
Empty wt: 278 lbs.
Wing span: 33ft.
Wing area: 160 sq.ft.
Height: 6 ft 7 in.
Length: 19ft.
Fuel cap; 5 USG.
Max wt: 500 lbs.
Stall speed: 27 mph.
Max speed: 63 mph.
Vne: 88 mph.
Climb rate: 800 fpm @ 32 mph.
Design limit: +6, -4g.
Glide ratio: 9-1.
Wing loading: 3.13 lbs/sq.ft.
Power loading: 14.19 lbs/hp.

The design and production of the ultralight Kestrel was the product of the efforts of Cec Lea, one of the pioneers of ultralight aircraft design and construction in Australia. A single seat, high wing, tractor engine aircraft it first appeared about 1990 and a number of examples were registered in the 95.10 registration series as late as mid-2000.

Lea sold both completed aircraft and kits for owner construction. All were powered by the Austrian Rotax 503 engine and many, if not all, were fitted with a Brolga three blade carbon/glass composite propeller. Some 16 Kestrels were built.

Lea Kestrel Kermit
Engine: Rotax 503, 37kW (50hp)
Cruising Speed: 100km/hr / 67mph
Range: 280km / 175mile