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Thread: Piston engine with a ducted fan unit ?

  1. #1
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    Default Piston engine with a ducted fan unit ?

    I was wondering and having wondered it before...could it work..to have big piston engine running a 1 meter dia fan pushing a jet like aeroplane 600 mph ?

    Technique or transmission here !



    Could it work ?

  2. #2
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    Default Re: Piston engine with a ducted fan unit ?


    It used an unusual setup of one Isotta-Fraschini radial piston engine to power a variable pitch ducted fan.
    Rampking

  3. #3
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    Default Re: Piston engine with a ducted fan unit ?

    But that is not legal for racing is it ?

    That has jet propulsion as well ???

    http://en.wikipedia.org/wiki/Ducted_fan
    Last edited by Juke; 03-21-2013 at 02:39 AM.

  4. #4
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    Default Re: Piston engine with a ducted fan unit ?

    This goes 260 mph with 650 hp..side by side trainer.

    http://en.wikipedia.org/wiki/RFB_Fantrainer

    Entire forward fuselage is before the fan unit ???
    Last edited by Juke; 03-21-2013 at 02:45 AM.

  5. #5
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    Default Re: Piston engine with a ducted fan unit ?

    Last edited by Juke; 03-21-2013 at 02:59 AM.

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  7. #7
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    Default Re: Piston engine with a ducted fan unit ?

    I have nearly ludicrous speed reaching jet concept/design...I wonder if a two stage fan unit to really accelarate the airflow could be arranged for it in a 90% scale model ?

    More about my mach 3.6 rocket interceptor here; http://max3fan.blogspot.fi/


  8. #8
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    Cool Re: Piston engine with a ducted fan unit ?

    Looks a bit different today.
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    Last edited by Juke; 04-10-2013 at 01:05 PM.

  9. #9
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    Default Re: Piston engine with a ducted fan unit ?

    We looked at this back in the '80's.
    With the engine (3,000 HP V-12) behind the fan you have major issues with the engine in the duct and how to shroud it. That brings engine access to the party. The pressure air in the duct give you a big increase in HP due to the ram effect. The drag is cooling the engine. A boiler system like Stelitto and Gost would work best. Exhaust would add to the thrust. Now add the aircraft and tanks holding 200 gal of fuel, water and ADI. Use a varible outlet to max the thrust and a varible pitch fan to complicate things and control the RPM of the engine.
    The other choice would be to have the engine fwd of the fan with side inlets. Then the fan would need it own support bearings front and back as the engines are designed to pull not push. The bearing suport for the prop shaft is not going tro handle the load. However that make the engine access and changes easy.
    I suppose you will want a cockpit and all that stuff.
    Anyway I think its great that you are thinking out of the box. You and those like you are the future of this world.

  10. #10
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    Default Re: Piston engine with a ducted fan unit ?

    This Napier '500 mph' design 'from back in the day' may be of interest..

    [..as is the Sabre vs R-2800 installation comparison..]

    http://www.flightglobal.com/pdfarchi...0-%201443.html

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