The InterPlane Skyboy is a two-seat, side-by-side, high wing, single engine, pusher
configuration ultralight aircraft that was manufactured as a completed aircraft by
InterPlane Aircraft of Zbraslavice, Czech Republic. InterPlane Aircraft sro, also
called InterPlane Aircraft Inc. was founded in 1992 in Kolín by a team
led by Ing. Milan Matějka and Petr Henčl. The Skyboy was designed in 1992
specifically for the German market as a trainer. On 16 April 1993, the InterPlane
Skyboy prototype was flown first at Kolín Airfield (LKKO); after that the firm moved to Zbraslavice
airport. The original Skyboy was developed according to older requirements with stall
speed under 55km/hr and 250kg empty weight. The Skyboy has a fully enclosable composite
cabin with side by side seats that make the
aeroplane suitable for trainer. The Skyboy wing is built from aluminum extrusions for the
spars and wing ribs and covered with doped aircraft fabric. The wing's leading edge is
Mylar covered in fabric, to increase stiffness. The wing is supported by ´V´ struts and
utilizes jury struts. The fuselage is built upon an aluminum main tube that runs from the
tail right to the rudder pedals. The wings and horizontal tail surfaces can be folded for
trailering or storage. The cabin is constructed from two fibreglass shells, joined together.
The rear of the cabin is covered in aircraft fabric. The optional cabin doors open upwards.
Controls are conventional three-axis. The control stick is a centrally mounted ´Y´ stick,
between the two seats that can be used from either seat. It was adapted for the US FAR 103
Ultralight Vehicles category for use as a two-seat trainer under the FAR 103 trainer exemption.
It was available as a US light-sport aircraft and in Canada as an Advanced Ultralight Aeroplane.
In 2013 the company announced that it was seeking a buyer for the business and its hangar and facilities.
By the end of that year the company defunct. About 100 InterPlane Skyboy aircraft were built. The ICAO
Aircraft Type Designator for the InterPlane Skyboy is SBOY:
variants
Skyboy — took its first flight on 16 April 1993; initial version, with Rotax 503 or 582 engine as standard
Skyboy UL — specially lightened (empty weight 225 kg) to meet US FAR Pt 103 ultralight trainer regulations; to stay below the exemption's 225 kg empty weight limit the aircraft was marketed without cabin doors, wheel pants and hydraulic brakes, using mechanical brakes instead and with a 410 kg gross weight. The initial engine was the 50 hp Rotax 503 and later the 64 hp Rotax 582
Skyboy S — reinforced version for higher MTOW and speeds; 64 hp Rotax 582 twin cylinder two-stroke aircraft engine, or larger engines and choice of wing spans
Skyboy EX — standard version from 1999; for European customers; also for customers in Australia Canada and USA, where it is classified in the FAA Experimental category
Skyboy ZK — a specific variant within the series, which became known in part through versions flown with more powerful four-stroke engines, like the Rotax 912
On 12 June 1997, the 1997-built Interplane Skyboy s/n 26-97 D-MOSB was noted in front of the assembly hall of InterPlane at Zbraslavice airfield (LKZB).
According to the data given by the "Sportfachgruppe Ultraleicht im DAeC" this Skyboy was registered D-MOSB at 11:20 hr on 2 April 1997.
It was temporary registered in Germany under VVZ (Vorläufige Verkehrszulassung zum Zwecke der Erprobung). This Skyboy
didn't get the license for Germany. In 2003, the improved Skyboy ZK finally received the license from the DAeC to fly in Germany.
