Czech-based PBS Velka Bites recently produced its 1,500th Safir SK/G MI auxiliary power unit (APU) that provides an independent power source for helicopters and airplanes. Offering both electrical and pneumatic power, the APU is designed to aid engine starting and onboard operations, including air conditioning.

The Safir SK/G MI is capable of continuous operation for up to six hours at altitudes of up to 6,000 meters (19,685 feet). It is equipped with an advanced diagnostic system featuring an RS-422 interface to monitor key parameters, including exhaust gas temperature and fluid status.

PBS Velka Bites manufactures four separate APU models, of which the SK/G MI is most in demand. The Safir SK/G MI also offers a simultaneous supply of compressed air and electrical power and can supply DC voltage. Meanwhile, the Safir SK/G Z8 and SPARK 40 offer similar features, with the latter increasing the flight envelope to 8,000 meters (26,247 feet).

Founded in 1950 in Velká Bíteš, Czech Republic, the company is a member of PBS Group, which originated from PBS Brno, established in 1814. Initially producing mining tools, PBS VB entered the aerospace sector in 1970, developing an APU for the Aero L-39 Albatros. In 2004, it expanded into propulsion units, including turbojet, turboshaft, and turboprop engines for aircraft.