Contra rotating propellers

Discussion in 'General Experimental Aviation Questions' started by Dave Hodges, May 6, 2019.

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  1. May 26, 2019 #21

    Dave Hodges

    Dave Hodges

    Dave Hodges

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    The reason this is desired is because the thrust line doesn't change when an engine is lost.
     
  2. May 26, 2019 #22

    Swampyankee

    Swampyankee

    Swampyankee

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    Last edited: May 26, 2019
    rv6ejguy, Dave Hodges and blane.c like this.
  3. Jun 3, 2019 #23

    Dave Hodges

    Dave Hodges

    Dave Hodges

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  4. Jun 18, 2019 #24

    henryk

    henryk

    henryk

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    -multi V-belt gear is a good dampfer...

    http://www.promex.rybnik.pl/jawa-250cc

    =we want to change 2-stroke G-25 motor to the speedway engine JAWA 250 (24 kg, >40 HP...),
    of course,with CR differential gear !
     

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  5. Jun 18, 2019 #25

    henryk

    henryk

    henryk

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    -great problem=battery weight and costs...

    -but=

    =motor (diesel)/ synchonous generator(EMRAX) +two synchronous
    electromotors (f.e. EMRAX) +ONE controller (for rear motor),
    may be today solution as hybrid power system
    (only little kWh from battery !)
     
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