Yes, same engines as the UH1-N and the two Cobras you mentioned. Also installed in modified Sikorsky S-58s that originally had a radial engine, and another version of the Twin-Pac used as a power unit (ST series). The military T400 version uses PT6T-6 insteaad of the commercial PT6T-3 series.
The AH1-W and UH1-Y are complete upgrades including the GE CT-7 engines and Bell 214 type drivetrain, close to doubling the power of the Pratts and drivetrains of the UH1-N and AH1-T.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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