Slovenian ultralight helicopter designer Miro Crv displayed his
Small Coaxial Helicopter SCH-2A at EAA AirVenture Oshkosh 2022 for the first
time. Bringing the aircraft to AirVenture was done in
cooperation with Mark Rumsey of Rototrek, LLC, of Murrieta,
California, an official reseller of the aircraft, which is compliant
to the FAA’s Part 103 Ultralight Vehicle rules.
VFS's Senior Editor Ken Swartz interviewed Miro Crv seated in a SCH-2A he delivered to a US customer earlier this year.
The development of the SCH-2A began 12 years ago, with the
desire to have an aircraft with a small footprint driving the coaxial
design, which was kept as simple as possible.
The cyclic and collective controls of the SCH-2A are similar
to most helicopters, but some of the unique aspects of the
rotor system include a pair of 14.3-ft (4.4-m) diameter fully
articulated rotors that use only a single spherical bearing with a
special kind of damper, and a simplified transmission that uses
a pair of belt drives to drive the rotors in opposite directions,
eliminating the need for a heavy gearbox. The rotor downwash
on the tail vanes also provides yaw control while hovering.
Mirocopter started serial production in February 2022. By the
time of AirVenture 2022, the company had aircraft already flying in
Korea, France, Slovenia, Germany and three delivered to the US.
Priced at $35,000, the SCH-2A is probably the lowest-cost
production helicopter in the world, with shipping costs adding
about $4,000.
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