Is this rotary any good?

Discussion in 'Mazda Rotary' started by Aviator168, Apr 18, 2013.

Help Support HomeBuiltAirplanes Forum by donating:

  1. Apr 18, 2013 #1

    Aviator168

    Aviator168

    Aviator168

    Well-Known Member

    Joined:
    Sep 21, 2012
    Messages:
    2,205
    Likes Received:
    249
    Location:
    Brookville, NY. USA
  2. Apr 18, 2013 #2

    Vigilant1

    Vigilant1

    Vigilant1

    Well-Known Member Lifetime Supporter

    Joined:
    Jan 24, 2011
    Messages:
    4,145
    Likes Received:
    1,876
    Location:
    US
    That link appears to require a subscription. Could you tell us enough about the article/concept (within "fair use" rules) so know what is being proposed?
     
  3. Apr 18, 2013 #3

    Aviator168

    Aviator168

    Aviator168

    Well-Known Member

    Joined:
    Sep 21, 2012
    Messages:
    2,205
    Likes Received:
    249
    Location:
    Brookville, NY. USA
  4. Apr 19, 2013 #4

    Vigilant1

    Vigilant1

    Vigilant1

    Well-Known Member Lifetime Supporter

    Joined:
    Jan 24, 2011
    Messages:
    4,145
    Likes Received:
    1,876
    Location:
    US
    I can't make any judgements from that, sorry. I do know it was published a long time ago and the idea apparently never became popular, which is something we shouldn't dismiss as being irrelevant.

    There are literally thousands of ideas for novel heat engines. Developing one that really works better than the present ones (and can me produced at reasonable cost) is hard.

    In short: Probably no one knows if this rotary is any good because nobody has seen a life size one. The Wankel is a great concept and it would be easy to fall in love with it on paper. It took NSU, a host of others, and finally (and especially) Mazda to work through all the engineering issues: Apex seals (a huge challenge), lubrication, efficient ignition, coatings for the housings that had the right properties and longevity, etc. Now the Mazda Wankels are very durable, light, and powerful, but that's a decades-long developmental chain. Piston engines went through the same things.
     
    Last edited: Apr 19, 2013
  5. Apr 19, 2013 #5

    Aviator168

    Aviator168

    Aviator168

    Well-Known Member

    Joined:
    Sep 21, 2012
    Messages:
    2,205
    Likes Received:
    249
    Location:
    Brookville, NY. USA
    True.

    But here is the thing. This design does not seem to have the short comings of all the other rotaries.

    Uneven heating -- does not exist
    Cooling and lubricating of seals -- no problem here
    Low compression ratio -- very high compression can be obtained
    Working volume to surface ratio -- better than piston engine
    A moving combustion chamber -- does not exist

    The only problem with this design is getting air in and out quickly. It is a challenge.
     

Share This Page



arrow_white