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  1. H

    Is there a gap in ARs ?

    You are wrong on so many points but you are not alone this thread has been one brow beating after another and with only one exception Nobody has tried to answer the original questions , I have bent over backwards to try and explane the question not realizing no one was listening .
  2. H

    Is there a gap in ARs ?

    " Space restrictions, mainly, like you have implied here. Be careful of the AAA on the 13th floor..." Planes in WW 2 used somthing called cable cutters to defeat barge ballons I wonder if thay would help with those annoying power lines . I can think of many other possible advantages , weight ...
  3. H

    Efficient thrust recommendation

    http://www.dtic.mil/dtic/tr/fulltext/u2/a393448.pdf Thinking outside of the box
  4. H

    Rocket airplane building cost

    SSTO is practcal , the problem is a ssto is over 90% propellent and designers are are starting off by saying "we will choose a propellent that is currently in use or GREEN , AVAILABLE , INEXPENSIVE , ETC. Propellent choice is the dicision that will make or brake a vehicle , throw in "and it...
  5. H

    Fabric systems choice

    "Besides - no aircraft designer would ever take into account any stiffening effect the fabric covering might add to the basic structure; sometimes it's a bonus, sure, but it is never relied on to any degree " I agree , I have never seen even any hint of how to "design in " the stiffening affect...
  6. H

    [DESIGN] Quick sketch of a twin screw flying wing ala Vought XF5U-1

    Just curious about landing gear style and placement , this might be a good canadate for bicycle with outriggers , this would positivly prevent the props from hitting the ground and keep the gear out of the wings. Also carbon kevlar could work , the carbon is a pultruded core and the kevlar is...
  7. H

    Is there a gap in ARs ?

    You are missing my piont , look at my example of the three boats and Think of the deisel engine as a sail plane wing It is efficiant but heavy ,costly , takes up a lot of space , and has a narrow CG range ,all of this compromises ehe rest of the plane . thay work well only on certan missions Ie...
  8. H

    Is there a gap in ARs ?

    I once saw a test done with three identical boats , one with a deisel engine , one with a four cycle engine ( otto ), one with a two cycle engine ( otto ), all three were the state of the art instalitions , none had the "wrong " propeller or a leaky fuel tank , Etc. The results of the tests (...
  9. H

    Is there a gap in ARs ?

    "all sorts of problems " Can you be more specific
  10. H

    All moving ailerons flight report

    What I have is the plane was called Peterodactyl IB and this is not clear but I belive the quite was from july 1973 Aeroplane Monthly/
  11. H

    All moving ailerons flight report

    Interesting excerpt from a flight report by Harald Penrose "Stalled Behaviour with the original big controllers was outstanding, the machine sinking steeply but in almost level attitude under full lateral and longitudinal control and with no tendency to spin. Small preformance loss , large...
  12. H

    Hello

    You are right of course I just thought buildilg a plane , at least for me , will be a long project and a plane that is beautiful , at least to me , will help during the hard times . I know what you mean a BF 109 or a fesler storch are not sleek but have a functional attractiveness . P.S. The new...
  13. H

    Hello

    I have been working on a design for a mountain UL for three years . First design did not meet my requirements , second met them but with no margin for weight growth , Third met requirements with margin but was ugly , even pretty weighs , latest is a completly new approch and is to early to comment .
  14. H

    High Wing - Low Wing Debate

    Piper pawnee low wing , protection from the sun ( roll over protection ? ) and manages to look good
  15. H

    Is there a gap in ARs ?

    I could be wrong but there seems to be a gap in AR between the ultralow AR planes 1-2 ( Arup , Wingless ) and the bottem of the conventional planes 4.5 ( Cusset special ). Does the gap exist ? What "mission " could the "very low " 2.5-4 AR planes forfill ?
  16. H

    The future is direct drive

    Been working on a twin engine UL design and assumed reduction drive was the only way to go , but when I looked at lowering the RPM , shortening the prop ( and landing gear ) , eliminating the fan cooling and going to hand propping , and a very long ( low RPM tuned exaust ) , I end up loosing 200...
  17. H

    Twin boom tails connected or not connected

    Having nothing between the booms would be comforting when it comes time to bail out
  18. H

    Twin boom tails connected or not connected

    abc
  19. H

    boxed in sesquiplane twin - possible improved deflection of propeller slipstream

    Since thay are in the slipstream the vertical closness may not have the same negitive affect. thay are flaperons that is what I ment by low speed roll controll long travel landing gear ( similar to a Storch ) should keep the flaps out of the weeds Plane has twin booms and a pod , low mounted...
  20. H

    What exactly makes a plane be STOL?

    Flight at high angles of attack allows the propulsor to rais the CL , I think the storch had a CL of about 4 with the propeller turning .
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