This Heinkel-Hirth RR2 experimental gas turbine engine was built in 1944 by Hirth Motoren, a subsidiary of Ernst Heinkel Aktiengesellschaft. It was designed to operate on a combined mechanical-thermal ...
Defense giant Northrop Grumman has flown the first in a new series of Bat unmanned aircraft systems (UAS) . The 12-ft.-wingspan UAV is outfitted with a Hirth engine and a low-acoustic five-blade ...
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