MOV00025
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Uploaded by semidiesel on Jan 23, 2009
First brief run of the 1936 16hp Petter Harmonic after arriving at the museum. She has not run for at least 35 years but appears to be in excellent mechanical condition, number 52 of 100 built and an ex factory show/development engine. She will be installed in Hall 7 and have her first public outing at the Easter Weekend Crankup.
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sounds like a lanz bulldog
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Sounds good and I subscribed
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WOW!!!! Sounds like a champ. Wish i could see it for real.
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You guys are to be commended on your efforts to preserve the past with these wonderful old engines.
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what is the knocking sound
biggdaddy2001 2 years ago
We are spinning her over with a motor to start, the first knocking is the decompressor gear. Second knocking after starting is fuel, took a bit of working out to get things right.
semidiesel 2 years ago
A uniflow diesel, which requires a resonant exhaust stack to work properly otherwise it would choke on its own exhaust gases- I'd imagine it's a pain to get the exhaust stack tuned just right.
douro20 3 years ago
Thats right, we have the correct length for the exhaust for when we install her properly. She ran surprisingly well on the short stub.
This particular design is special because it only uses crankcase compression when starting (manually operated valve), when running the tuned length exhaust creates a partial vacumn in the cylinder drawing fresh air in.
semidiesel 3 years ago