rotary engines

Discussion in 'Gallery & Designs' started by Richard, Apr 26, 2006.

  1. Richard

    Richard Member

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    here are a couple of pictures of some rotary engines I designed lately.
    The small ones are a 7 cylinder Gnome and a 9 cylinder Le Rhone in 1/33 scale.
    Plans are to design some planes to fit them on.

    The big uncoloured one, still under developement but in it's final stages, is a Clerget 7Z from about 1913. Scale of this one is about 1/11.

    http://home.planet.nl/~schul923/new/001.jpg
    http://home.planet.nl/~schul923/new/002.jpg
    http://home.planet.nl/~schul923/new/003.jpg
    http://home.planet.nl/~schul923/new/004.jpg
    http://home.planet.nl/~schul923/new/005.jpg
    http://home.planet.nl/~schul923/new/006.jpg
    http://home.planet.nl/~schul923/new/007.jpg
    http://home.planet.nl/~schul923/new/008.jpg
    http://home.planet.nl/~schul923/new/009.jpg
    http://home.planet.nl/~schul923/new/010.jpg
    http://home.planet.nl/~schul923/new/011.jpg

    hope you like em,

    Richard
  2. Richard

    Richard Member

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    here are a couple of pictures of some rotary engines I designed lately.
    The small ones are a 7 cylinder Gnome and a 9 cylinder Le Rhone in 1/33 scale.
    Plans are to design some planes to fit them on.

    The big uncoloured one, still under developement but in it's final stages, is a Clerget 7Z from about 1913. Scale of this one is about 1/11.

    http://home.planet.nl/~schul923/new/001.jpg
    http://home.planet.nl/~schul923/new/002.jpg
    http://home.planet.nl/~schul923/new/003.jpg
    http://home.planet.nl/~schul923/new/004.jpg
    http://home.planet.nl/~schul923/new/005.jpg
    http://home.planet.nl/~schul923/new/006.jpg
    http://home.planet.nl/~schul923/new/007.jpg
    http://home.planet.nl/~schul923/new/008.jpg
    http://home.planet.nl/~schul923/new/009.jpg
    http://home.planet.nl/~schul923/new/010.jpg
    http://home.planet.nl/~schul923/new/011.jpg

    hope you like em,

    Richard
  3. darenfranks

    darenfranks New Member

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    Any chance these will be downloadable???? I would love to try these out!

    That look great
  4. darenfranks

    darenfranks New Member

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    Any chance these will be downloadable???? I would love to try these out!

    That look great
  5. Bengt F

    Bengt F Active Member

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    Paper Rotary Engines

    Goede Dag, Richard!

    I really like them - these paper model rotary engines are amazing! What an incredible detailing, at this 'micro'-small scale. Fantastic precision -
    I really like the pushrods and the exhausts.
    This is just the thing I have been looking for for my new 1/6th scale R/C (Dutch dark green) Fokker D. VIII build, with a spinning brushless electric motor.
    I would very much like to try one of your Gnôme, Le Rhône or Oberursel Ur. II 9-cylinder engines for my plane.
    Here´s my mail address, if you by any chance can arrange something:
    bengt@freden.se
    I could try out a 'prototype' build in large 1/6th scale for you . . .
    I´d be more than willing to pay you for your design, of course.

    Cheers,
    Bengt:wink:
    This is what I need:
    [​IMG]
  6. Bengt F

    Bengt F Active Member

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    Paper Rotary Engines

    Goede Dag, Richard!

    I really like them - these paper model rotary engines are amazing! What an incredible detailing, at this 'micro'-small scale. Fantastic precision -
    I really like the pushrods and the exhausts.
    This is just the thing I have been looking for for my new 1/6th scale R/C (Dutch dark green) Fokker D. VIII build, with a spinning brushless electric motor.
    I would very much like to try one of your Gnôme, Le Rhône or Oberursel Ur. II 9-cylinder engines for my plane.
    Here´s my mail address, if you by any chance can arrange something:
    bengt@freden.se
    I could try out a 'prototype' build in large 1/6th scale for you . . .
    I´d be more than willing to pay you for your design, of course.

    Cheers,
    Bengt:wink:
    This is what I need:
    [​IMG]
  7. CharlieB

    CharlieB Member

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    Richard:

    Great looking engines! Keep up the great work! Hard to believe that they're paper.

    CharlieB
  8. CharlieB

    CharlieB Member

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    Richard:

    Great looking engines! Keep up the great work! Hard to believe that they're paper.

    CharlieB
  9. Firstscout

    Firstscout New Member

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    What is the difference between the "Rotary" and "Radial" engine?
  10. Firstscout

    Firstscout New Member

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    What is the difference between the "Rotary" and "Radial" engine?
  11. Bengt F

    Bengt F Active Member

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    Rotary And Radial Engines

    Hi Firstscout,

    A rotary engine rotates with the propeller and a radial engine is in a normal 'fixed' position, with the cylinders in a row, similar to a car engine. The rotary engine thus gets the cooling from the airflow while the radial engine needs a water cooler system.
    For example, the Fokker Dr. I triplane has a rotary engine while the Fokker D VII has a radial engine.
    Here´s some rotary engine theory:
    http://www.aviation-history.com/engines/rotary-theory.htm
    And here´s how a rotary engine works:
    http://www.keveney.com/gnome.html
    And here is a beautiful (working) scale rotary engine for R/C models:
    http://www.replicaengines.com/products/gnome.htm

    best regards,
    Bengt:grin:

    (edited in): Thanks Rob, for coming to my aid. This is obviously not my special area of knowledge - I stand corrected.
  12. Bengt F

    Bengt F Active Member

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    Rotary And Radial Engines

    Hi Firstscout,

    A rotary engine rotates with the propeller and a radial engine is in a normal 'fixed' position, with the cylinders in a row, similar to a car engine. The rotary engine thus gets the cooling from the airflow while the radial engine needs a water cooler system.
    For example, the Fokker Dr. I triplane has a rotary engine while the Fokker D VII has a radial engine.
    Here´s some rotary engine theory:
    http://www.aviation-history.com/engines/rotary-theory.htm
    And here´s how a rotary engine works:
    http://www.keveney.com/gnome.html
    And here is a beautiful (working) scale rotary engine for R/C models:
    http://www.replicaengines.com/products/gnome.htm

    best regards,
    Bengt:grin:

    (edited in): Thanks Rob, for coming to my aid. This is obviously not my special area of knowledge - I stand corrected.
  13. 46rob

    46rob Member

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    Not exactly----but close. The rotary engine rotates with the prop, acting as a flywheel, and gets its cooling from the airflow as it rotates. The radial is also a circular engine, usually aircooled, but it is mounted rigidly to the firewall, and the crankshaft turns the propellor, only. Cooling is by airflow from the propellor and/or forward movement of the aircraft. In some designs, such as pusher installations or helicopters, an impellor is attached to provide circulation. Radial engines can be compounded, with several banks of cylinders. The inline engine, is like an automotive engine in layout, with cylinders in one or more lines, and are generally liquid cooled. The rotary engine fell from favor early, as it was size limited, messy, and less efficient than the later radial engines. The inline can be streamiled more than the round engines, but carries the penalty of increased weight and vulnerability due to it's cooling system.
  14. 46rob

    46rob Member

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    Not exactly----but close. The rotary engine rotates with the prop, acting as a flywheel, and gets its cooling from the airflow as it rotates. The radial is also a circular engine, usually aircooled, but it is mounted rigidly to the firewall, and the crankshaft turns the propellor, only. Cooling is by airflow from the propellor and/or forward movement of the aircraft. In some designs, such as pusher installations or helicopters, an impellor is attached to provide circulation. Radial engines can be compounded, with several banks of cylinders. The inline engine, is like an automotive engine in layout, with cylinders in one or more lines, and are generally liquid cooled. The rotary engine fell from favor early, as it was size limited, messy, and less efficient than the later radial engines. The inline can be streamiled more than the round engines, but carries the penalty of increased weight and vulnerability due to it's cooling system.
  15. cygielski

    cygielski Member

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    One note to Rob's otherwise good write-up: aircraft engines, whether radial or inline, were VERY rarely liquid cooled (to save weight, they usually have oil coolers instead).
  16. cygielski

    cygielski Member

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    One note to Rob's otherwise good write-up: aircraft engines, whether radial or inline, were VERY rarely liquid cooled (to save weight, they usually have oil coolers instead).
  17. 46rob

    46rob Member

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    Even radial engines have oil coolers. The typical Liberty, Allison, RR, or MB inline all utilized radiators of some form or another. Many times, flush mounted to the fuselage, like the Supermarine S-6 racer. Opposed inline engines, however, are generally aircooled, such as the Continentals and Lycomings that power most light civil aircraft (they got oil coolers too). Many jets cool their oil in heat exchangers, where they use the hot lubricant to preheat the jet fuel. Heck--even my 50 year old MG has an oil cooler.

    I really like those rotary engines--we've got a few in the museum here, and they are a marvel of mechanical engineering. Your models perfectly bring out the details on this fascinating, (and long gone) type of engine. I hope you'll share them with the rest of the modeling community eventually.
  18. 46rob

    46rob Member

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    Even radial engines have oil coolers. The typical Liberty, Allison, RR, or MB inline all utilized radiators of some form or another. Many times, flush mounted to the fuselage, like the Supermarine S-6 racer. Opposed inline engines, however, are generally aircooled, such as the Continentals and Lycomings that power most light civil aircraft (they got oil coolers too). Many jets cool their oil in heat exchangers, where they use the hot lubricant to preheat the jet fuel. Heck--even my 50 year old MG has an oil cooler.

    I really like those rotary engines--we've got a few in the museum here, and they are a marvel of mechanical engineering. Your models perfectly bring out the details on this fascinating, (and long gone) type of engine. I hope you'll share them with the rest of the modeling community eventually.
  19. Bengt F

    Bengt F Active Member

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    Rotary And Radial Engines

    Many thanks, Cygielski and Rob, for straightening things out, and for sharing your knowledge!

    best,
    Bengt:rolleyes:
  20. Bengt F

    Bengt F Active Member

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    Rotary And Radial Engines

    Many thanks, Cygielski and Rob, for straightening things out, and for sharing your knowledge!

    best,
    Bengt:rolleyes: