The Walter Mikron is a four-cylinder, air-cooled, inverted straight engine for aircraft.

In the 1980s an initial batch of engines was rebuilt by Aerotechnik Moravska Trebova for use on L-13 Vivat motorgliders.

The company Aerotechnik was later bought by Parma Technik and production resumed in 1999, under a new name, in the same factory.

With a displacement of 2.44 L (148.90 cu in), compression ratio 6:1, it produces 48.5 kW (65.0 hp) at 2,600 rpm.

Improved version of the Mikron IIIA 56 kW (75 hp) at 2,750rpm for 5 minutes, max continuous power of 51 kW (69 hp) from 2.44 L (148.90 cu in), compression ratio 7.2:1, bore 90 mm (3.54 in), stroke 96 mm (3.78 in), dry weight 69 kg (152.12 lb) Almost identical with IIIA except the compression ratio.