The Ranger, an easily built high wing LSA runabout

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

Help Support HomeBuiltAirplanes Forum by donating:

  1. Apr 10, 2019 #501

    erkki67

    erkki67

    erkki67

    Well-Known Member

    Joined:
    Feb 18, 2010
    Messages:
    1,513
    Likes Received:
    164
    Location:
    Romont / Fribourg / Switzerland
    Good evening Fritz, what are the sized of plywood sheets your milling your parts from?
    The question, because the sheets we have access to are 1500mm by 1500mm or for birch plywood. And 1250mm by 1250mm for Okoumé or Gaboon plywood, which cheaper by the way but less resistant too.
     
  2. Apr 10, 2019 #502

    rtfm

    rtfm

    rtfm

    Well-Known Member

    Joined:
    Jan 3, 2008
    Messages:
    3,181
    Likes Received:
    566
    Location:
    Brisbane, Australia
    Hi. Thanks for your reply VB. You're correct though. I should have posted in a more appropriate thread. We all need to keep our posts focussed on the Ranger.
     
  3. Apr 10, 2019 #503

    rtfm

    rtfm

    rtfm

    Well-Known Member

    Joined:
    Jan 3, 2008
    Messages:
    3,181
    Likes Received:
    566
    Location:
    Brisbane, Australia
    I'm no expert, but since Gaboon (2440 x 1220) is available here, and I already have most of my requirements in the workshop, That's what I'll be using. It's widely used here in Oz for planes.
     
  4. Apr 10, 2019 #504

    stanislavz

    stanislavz

    stanislavz

    Well-Known Member

    Joined:
    Aug 22, 2016
    Messages:
    170
    Likes Received:
    31
    Location:
    Lt
    Hi ! Two cents. Why dont add another pair of wing and make it biplane ? Instead of making three section of single wings , and connecting then ? This fuselage ask for negative stagger biplane wings like hyperlight ultralight.

    Plus - if bottom wing is made to stall first, it will auto - recover from stall.

    And remove tail section for transport.

    [​IMG]

    http://legendsintheirowntime.com/LiTOT/Content/1943/UC43_AN_4307_DA.html
     
    Last edited: Apr 10, 2019
  5. Apr 10, 2019 #505

    FritzW

    FritzW

    FritzW

    Well-Known Member

    Joined:
    Jan 31, 2011
    Messages:
    3,529
    Likes Received:
    3,138
    Location:
    Las Cruces, NM
    I'm using 4'x8' sheets of 1/8" Birch (1219mm x 2438mm x 3mm). I made a set of Stewart Headwind wing ribs out of 6mm Okoume. It wanted to "potato chip" a little but nothing the frame wouldn't straighten out.

    CS test 1250.1500.png Just a quick and dirty overlay of your sheet sizes on the first cookie sheet. The top of the fuselage skin would fit on a 1250mm sheet. The bottom half would take another splice to fit on a 1500mm sheet. EDIT: I threw in a QBWW rib just to see how it's fit, the foam ribs have the same outer size. What are physical properties of the ply your dealing with? (should be listed in some Mil-Spec or Lloyd's spec?)

    I'm working on the second cookie sheet as we speak, the only other piece that might be a problem is the rear pylon skin.
     
  6. Apr 10, 2019 #506

    erkki67

    erkki67

    erkki67

    Well-Known Member

    Joined:
    Feb 18, 2010
    Messages:
    1,513
    Likes Received:
    164
    Location:
    Romont / Fribourg / Switzerland
  7. Apr 10, 2019 #507

    erkki67

    erkki67

    erkki67

    Well-Known Member

    Joined:
    Feb 18, 2010
    Messages:
    1,513
    Likes Received:
    164
    Location:
    Romont / Fribourg / Switzerland
  8. Apr 11, 2019 #508

    erkki67

    erkki67

    erkki67

    Well-Known Member

    Joined:
    Feb 18, 2010
    Messages:
    1,513
    Likes Received:
    164
    Location:
    Romont / Fribourg / Switzerland
    62734871-4AB9-498C-96C2-15C284965E66.jpeg

    Fritz, this bird had a metal structure for the wingroot, right?!

    That would also mean that less plywood would be required?
     
  9. Apr 11, 2019 #509

    erkki67

    erkki67

    erkki67

    Well-Known Member

    Joined:
    Feb 18, 2010
    Messages:
    1,513
    Likes Received:
    164
    Location:
    Romont / Fribourg / Switzerland
    Further I found out that the company that deliver and manufacture the plywood have the 2500 x 1250mm plywood size too, just non certified
     
  10. Apr 13, 2019 #510

    FritzW

    FritzW

    FritzW

    Well-Known Member

    Joined:
    Jan 31, 2011
    Messages:
    3,529
    Likes Received:
    3,138
    Location:
    Las Cruces, NM
    Just a quick update on the Ranger. The second cookie sheet is done but I can't cut it until next week. ...I need to put the VP-2 wing spar jigs back on the table to finish up a wing "kit" that me and a friend of mine have been trying to get done for months.

    Side note: a spot in the "building area" of our EAA hangar opened up today. I'll probably put the Ranger fuselage together there (I spend most of my time there anyway).

    Side note to the side note: I have to decide on an engine before I go too much farther. The "sticks" are different depending on whether it's going to be a bed mount or a firewall mount.
     
    D_limiter likes this.
  11. Apr 13, 2019 #511

    D_limiter

    D_limiter

    D_limiter

    Member

    Joined:
    Jul 13, 2018
    Messages:
    9
    Likes Received:
    6
    Location:
    Norcal
    Thanks for the update!

    What kind of engines are you considering for the ranger?
     
  12. Apr 13, 2019 #512

    FritzW

    FritzW

    FritzW

    Well-Known Member

    Joined:
    Jan 31, 2011
    Messages:
    3,529
    Likes Received:
    3,138
    Location:
    Las Cruces, NM
    I've pretty much given up on the V-Twin. I'm thinking either a Polini Thor 250 or a Casler 1/2 VW. It would be a little tail heavy with a Polini but that's solvable. ...and I'm not sure I completely believe the numbers for either engine. (I'm not an engine guy and I hate engine decisions).
     
  13. Apr 14, 2019 #513

    erkki67

    erkki67

    erkki67

    Well-Known Member

    Joined:
    Feb 18, 2010
    Messages:
    1,513
    Likes Received:
    164
    Location:
    Romont / Fribourg / Switzerland
    What don’t you like with the v-twin?
     
  14. Apr 14, 2019 #514

    erkki67

    erkki67

    erkki67

    Well-Known Member

    Joined:
    Feb 18, 2010
    Messages:
    1,513
    Likes Received:
    164
    Location:
    Romont / Fribourg / Switzerland
    By the way, this weekend I was the Air-Fair of Friedrichshafen in Germany, and found several engine options for the Ranger, including a v-Twin of Swiatek, Polini, two Wankel derivatives, electric powerhouses and one powered by a fuelcell.

    The later was or will be a challenge to have its hydrogen tank implemented into a frame of the Ranger, it’s spherical.

    I like the idea of an electric bird with a fuel cell, that makes sense to me.
     
  15. Apr 14, 2019 #515

    erkki67

    erkki67

    erkki67

    Well-Known Member

    Joined:
    Feb 18, 2010
    Messages:
    1,513
    Likes Received:
    164
    Location:
    Romont / Fribourg / Switzerland
    For the wood issue, I’ve been talking to a friend, who is able to join two 3mm birch plywood panels and mill them accordingly to spec.

    The plywood is certified with GL and not only aircraft grade
     
  16. Apr 14, 2019 #516

    erkki67

    erkki67

    erkki67

    Well-Known Member

    Joined:
    Feb 18, 2010
    Messages:
    1,513
    Likes Received:
    164
    Location:
    Romont / Fribourg / Switzerland
  17. Apr 14, 2019 #517

    erkki67

    erkki67

    erkki67

    Well-Known Member

    Joined:
    Feb 18, 2010
    Messages:
    1,513
    Likes Received:
    164
    Location:
    Romont / Fribourg / Switzerland
    And for the Ranger Parasol, the 3 cylinder Radial of Verner might be neat too.
     
  18. Apr 14, 2019 #518

    erkki67

    erkki67

    erkki67

    Well-Known Member

    Joined:
    Feb 18, 2010
    Messages:
    1,513
    Likes Received:
    164
    Location:
    Romont / Fribourg / Switzerland
    8A2DD2CC-FF17-4DBC-8732-55D53492EA66.jpeg

    How could someone not love this layout?

    This concept offers all most any possibility to customize, as long as you leave the fuselage at it is.

    I’m going for the fuselage first, it doesn’t take more space to store the two wings.

    Is wish we had something similar like an EAA chapter here with a Hangar Corner, where we could meet and work on our home knitted birds.

    The fact is, that we have an active home building scene here, but all of them are creating their marvels in their own workshop, as inviduals.
     
    9aplus likes this.
  19. Apr 14, 2019 #519

    saini flyer

    saini flyer

    saini flyer

    Well-Known Member

    Joined:
    Mar 12, 2010
    Messages:
    412
    Likes Received:
    108
    Location:
    Dallas, TX
    Erkki, please elaborate on the fuel cell and a webpage link for the company?
     
  20. Apr 14, 2019 #520

    FritzW

    FritzW

    FritzW

    Well-Known Member

    Joined:
    Jan 31, 2011
    Messages:
    3,529
    Likes Received:
    3,138
    Location:
    Las Cruces, NM
    Building airplanes at the chapter hangar is more like going to a social club, It's a lot of fun and (sometimes) a lot gets done. But I'd bet 99% of homebuilts over here are built at home or in a private hangar.

    The Scarlett 3V would be a good candidate. I wounder if it could mount directly to the firewall (VP style with no motor mount)?
     
    Tiger Tim likes this.

Share This Page

arrow_white