The Ranger, an easily built high wing LSA runabout

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by Victor Bravo, Feb 19, 2019.

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  1. May 25, 2019 #741

    Gregory Perkins

    Gregory Perkins

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    here is a few dozen ideas I compiled. This is the single greatest reason for amateur sport flying decline. IE high
    cost of hanger space or unavailability..... Portable towable planes if they existed predominately .... would have resulted in a continuing hi activity level equal to two or three decades ago.
    https://www.use.com/editset.pl?set=68ca7107ffb9de30915d

    When you get the link scroll down to see all thumbnails.

    I guess I am a little late in joining this forum.
     
  2. May 25, 2019 #742

    BJC

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    Welcome to HBA.

    With all those examples of aircraft with folding wings, why do we not see more of them?


    BJC
     
  3. May 26, 2019 #743

    pwood66889

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    Excellent question! And a good spring board. How does one break out a thread?
     
  4. May 26, 2019 #744

    FritzW

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    Just start another thread with an appropriate title. ie. "Why don't we see more folding wings?". I think it'd be very interesting.

    If your not a "thread starter" one of us would be happy to start it.
     
  5. May 26, 2019 #745

    FritzW

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    I'm still stuck on an engine for the Ranger. And if I keep psychoanalyzing the decision I'll never get this thing finished. So, unless I get *bad news from Hummel Engines, it's going to be a 42hp, hand propped, 1/2 VW.

    *I sent him an email asking about availability and lead time. I've heard the wait times for one of his engines can be pretty long.
     
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  6. May 26, 2019 #746

    Hephaestus

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    Between the 1/2vw, rotax 582, and other options (ie maybe Briggs) it might be easier to ballpark it, lighter engines mount farther forward heavier farther back. Then build cowl to suit engine choice. As long as there's a reasonable way and a realistically attainable entire in the weight/hp range to use - just allow a couple options and let the builder decide end of day. My .02
     
  7. May 26, 2019 #747

    FritzW

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    Yep. Different engines just change a few parts in the front end, pick the engine you want and build it that way.

    I'm going with a 1/2 VW just because it's a well established, turn key, off the shelf option ...and Hummel Engines is within driving range of my house ;)
     
  8. May 26, 2019 #748

    Vigilant1

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    George,
    Sorry, I overlooked this post from you.
    The photos are all in a single graphic. You should be able to highlight the whole thing and cut/paste it into another document. Unfortunately, it is fairly low resolution and it will probably break up if you enlarge it by very much.
    I'll see if I can find the original source and get something sharper. I might have gotten it from the ghastly CX4 Yahoo pages of yore, so I don't hold out much hope of re-finding it.

    I would think wing bolts or some other rapidly hand-tightenable hardware would allow the four fasteners per side to be put on and off in a hurry.

    Edited to add:
    I found the images of the CX4 wing fold bracket/fixture, I reposted some on the media section here.
     
    Last edited: May 26, 2019
  9. May 26, 2019 #749

    erkki67

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    Fritz, how long would the Ranger become if the wings are folded around the rear spar, in the folded configuration?

    For the builders outside the US, those half VW engines are out of reach, due to freight, customs and avt, which can double the price your paying in the US.

    My critter is going to have a B/S or derivative powerplant up in front.

    I do like the thoughts of Armilite this concerning.
     
  10. May 26, 2019 #750

    FritzW

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    A little over 19'

    R2 Cont4.JPG
    R2 Cont3.JPG

    R2 Cont1.JPG

    R2 Cont2.JPG
     
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  11. May 26, 2019 #751

    Victor Bravo

    Victor Bravo

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    That rendering of the airplane in the container... You just gave a teenager in Switzerland his first copy of Hustler magazine.

    Now you've done it for darn sure!
     
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  12. May 26, 2019 #752

    FritzW

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    I was going for the Farrah Fawcett poster effect ...but I don't know if these kids today would know what that is :confused:

    R2 Cont6.JPG
     
  13. May 26, 2019 #753

    Victor Bravo

    Victor Bravo

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    The Shawshank Homebuilt !
     
  14. May 26, 2019 #754

    BJC

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    The memory set my heart aflutter ...


    BJC
     
  15. May 26, 2019 #755

    erkki67

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    Fritz, gorgeous those renderings, congrats

    If folded around the aft spar, could the center section be about 4 bays wide in total and fold then the wing aft?
     
  16. May 27, 2019 #756

    FritzW

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    There would be some really significant disadvantages to doing that. What would be the advantage?
     
    Last edited: May 27, 2019
  17. May 27, 2019 #757

    Hot Wings

    Hot Wings

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    What disadvantages? Structurally it should be a wash with a strut braced design unless you are using a single pin at the wing spar root rather than one at the top and bottom.

    The big advantage is a shorter package when folded, at the expense of some width. And if that is no wider than the gear you end up with a real plus.
     
  18. May 27, 2019 #758

    Vigilant1

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    If you think you can get by with 32 HP and you want a flight-proven B&S derivative, maybe check with the MiniSport folks and see if they'll sell you one of their SE33 engines (based on the B&S 810cc engine). Unfortunately, all of their dealers (France, Netherlands, Germany) are about 8 hours from you, and their HQs in Czech Republic is about 10 hours. Maybe make it a little holiday trip, get to see the engine up close, etc. I'm guessing they build the kits to order, but maybe they can put you in touch with a builder who has one on an airplane, or in a box.

    What about that pretty little Swiss engine you showed here a few weeks ago?
     
  19. May 27, 2019 #759

    FritzW

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    The biggest disadvantage is it would require a complete redesign of wing. You'd have all the weight, hassle and expense of a cantilever wing but you'd still need all the weight, hassle and expense of wing struts.

    Is it too long? (If it ain't broke, why fix it?) Even pivoting at the rear spar (which is what Erkki asked about) it fits in a 20' shipping container. How much shorter does it need to be? If it pivoted at the front spar (which is where I plan to do it) it wouldn't add anything to the length. ...and it wouldn't add as much weight to the tailwheel when folded.

    IMHO It sounds like an expensive, complicated, PITA solution to a problem that doesn't exist. ;)
     
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  20. May 27, 2019 #760

    Victor Bravo

    Victor Bravo

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    +1 on the idea of one spar pin at the root rib. Yes you could turn this into an F-111. No you should not.

    One root pin is a LOT easier to remove and install.
     

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