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My Jet Engine Projects Anyone can build a pulsejet or turbojet engine Last updated 12 April 2009 PJ8C, $299 -- new batch available now PJ8C flies in Bobcat 52 I've fitted a PJ8C into a Chinese ARF Bobcat 52 and started the test-flights. Because the engine is mounted part-way inside the fuselage, I had to add some ducts so that it can breathe. Originally I tried to use some low-drag NACA ducts but