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  1. J

    Jet question

    How does one calculate what thrust a plane needs to maintain level flight? I would like to know how much thrust a Harmon Rocket would need to maintain level flight. thanks.. JD
  2. J

    Lost Engine Logs

    Can someone answer this for me? I am looking for an engine for my experimental homebuilt. Many times, I have seen ads for an engine which although it may have been overhauled, the engine logs are lost.. What does this mean as to the use of the engine in a homebuilt? Is the engine still a...