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how do you stop the test bench from flying away?
Don't get your thumb in front of it Mike Jo
I worked on aero engine overhaul back in the 1960s, and for test running our engines, mainly 260hp IO-470 Continental we had a coarse pitched prop with shortened blades, this prop was calibrated to absorb the required power at the correct rpm. For other engines we had an adjustable pitch prop.Ian S C