Ducted fan aircraft

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by jthunt, Mar 17, 2012.

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  1. Oct 17, 2019 #1581

    Doggzilla

    Doggzilla

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    I’ve thought about that too. It would definitely make a good hybrid drive unit, as it would free space for a genset.

    Malish has stated he is interested in electric propulsion.
     
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  2. Oct 18, 2019 #1582

    Malish

    Malish

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    I know that many people tried to use Mazda rotary engine's(if that what we're talking about) to power aircraft, but in most cases it wasn't successful. I personally know(from my automotive business)- this engines are very hard to maintain in workable condition and not repairable, if something happens(mechanically) to them. We did choose our power plant and will stay with that.
     
  3. Oct 18, 2019 #1583

    Malish

    Malish

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    Hybrid power is not good for aircraft use, because aircraft power plant most of the time working at high power conditions and should have same power engine and generator to supply electric motor with power, as gasoline engine alone. In the cars this setup(hybrid) is working fine - because the cars very seldom use high power settings for driving them and smaller engine with generator have time to recharge the batteries.
    For battery powered electric aircraft so far - not long range(time of flight) and long time to recharge them, even the charging station will be available at ALL airports, maybe in few more years?......
     
    Last edited: Oct 18, 2019
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  4. Oct 18, 2019 #1584

    Doggzilla

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  5. Oct 19, 2019 #1585

    Malish

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    This time, hybrid power plant is not useful on GA aircraft - it's very expensive and only can be used as experimental power plant by companies with lot of money in the budget.
     
  6. Oct 19, 2019 #1586

    Doggzilla

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    Yes, that is a valid statement.

    Besides someone making an experimental system out of Tesla car motors, I do not see any way to test on GA. Very little else is available or built to the standards GA aircraft require.
     
  7. Oct 19, 2019 #1587

    Malish

    Malish

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    That is why we're still flying our aircraft with "old design" gasoline engine so far. I'm is almost 65, but still flying and test flying our
    PJ-II "Dreamer" too, but as a co-pilot - Andrey fly it and I'm recording all needed flight information, but sometime I have chance to fly it too.


    20190919_113156_8O9A1358 (Large).JPG 20190919_113345_8O9A1378 (Large).JPG
     
  8. Oct 20, 2019 #1588

    Doggzilla

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    65 and still doing more than most of us young guys around here.

    I hope Ive got that much energy when I reach that age!
     
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  9. Oct 22, 2019 #1589

    Malish

    Malish

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    This weekend, we did 3D scan on our PJ-II "Dreamer", to see how good we did assembled our aircraft from kit parts. This will be used to correct assembly manual for our kit aircraft buyers. To do that scan, we did have to put about 3000 lite-reflectors stickers on aircraft, now our aircraft looks like Christmas tree!:) PA212030 (Large).JPG PA212032 (Large).JPG PA222066 (Large).JPG
     
    Last edited: Oct 22, 2019
  10. Oct 22, 2019 #1590

    Terrh

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    Let me start with saying that I absolutely love this airplane. It truly is my "dream".

    I think you've picked the correct powerplant - the LS7 is an outstanding engine from any viewpoint. Making a reliable 400HP @ 5000 RPM should be no sweat, and with the dry sump it's easy to keep well oiled and cool.

    The mazda rotary was fantastic for it's time, but with no new development on it in a long time it's got many matches now, and at big power numbers they don't live forever.

    I have been following this for a few years and am ecstatic that it is flying now and you should have kits in production soon.
     
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  11. Oct 22, 2019 #1591

    Malish

    Malish

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    I'm think so too;)
     
  12. Oct 22, 2019 #1592

    pfarber

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    A conventional twin style ducted fan would be easier and less expensive to make.

    Can't really get excited about an E/AB that I'll never, ever had the chance to own.

    An S-3 Viking clone won't be sexy, but you could sell more
     
    Last edited: Oct 22, 2019
  13. Oct 24, 2019 #1593

    Malish

    Malish

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    I like S-3 Viking aircraft too, but I think that replica of this aircraft wouldn't sell more, or would be easier and less expensive to produce.
    Some one already tried to build "ducted fan" replica of A-10 aircraft with Mazda rotary engines, but never succeeded.
    S-3B_Viking_launched_off_the_flight_deck_of_the_USS_Theodore_Roosevel.jpg 758f6e8c8e09b21c66cf947996efb331.jpg
     
  14. Oct 25, 2019 #1594

    henryk

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    =DREAMER is moore "sexy" !

    and much "fighter" ...
     
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  15. Oct 26, 2019 #1595

    Erik Snyman

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    Morning listers

    My first post on this one, but, Man, I just love that A10. It looks so mean!!!! If Malish can get his drive to work on the Dreamer, I am sure that, by some extra-polarization (is that the right word?) Malish could develop a system that could work on an A10 replica. I will be first in line for a kit on that one.

    Erik in Oz.
     
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  16. Oct 26, 2019 #1596

    Erik Snyman

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    Sorry, the word I was looking for in the post above, is 'extrapolation'. English is not my first language. It is not even my second language.....:oops:

    Erik in Oz.
     
  17. Oct 26, 2019 #1597

    Malish

    Malish

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    Sorry guys, but there no ways to install ducted fan with piston engines at those replica aircraft. Mechanically it's would require installation of multiple drive shaft's with 90 digress turns - this is very complex, heavy and expansive. This applies for ALL pylon mounted jet engine aircraft replica's, there is no way to install piston engine with ducted fan in place of turbojet engine - this is aerodynamically very difficult and most of the time will effect CG of aircraft, only way is to install piston engine - in the fuselage.
     
    Last edited: Oct 26, 2019
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  18. Oct 26, 2019 #1598

    REVAN

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    @Malish Sorry if this has already been addressed somewhere in the very long thread; But, why did you choose to do two fans driven off one motor, instead of using one fan with a little larger diameter? It seems this would be mechanically simpler and lighter.
     
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  19. Oct 27, 2019 #1599

    Malish

    Malish

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    It's interesting to, but my original design was like this, but my partner, deed see it differently and we build something different, design (Large).JPG
     

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  20. Oct 27, 2019 #1600

    BJC

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    I like what you built.


    BJC
     

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