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Thread: The Ranger, an easily built high wing LSA runabout

  1. #241
    Registered User rtfm's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    Hi VB... You've missed your calling. The most enjoyable post I've read on HBA.

    Thanks
    Duncan
    ====================
    Brisbane, Australia

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    Registered User FritzW's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    I got the "ergonomics" mock up cut out tonight. It's not glued together yet but I had to put it together to see how it looked.


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ID:	79092 It went together with a nice press fit (I didn't clearance the tabs and slots because I figured the foam would have enough 'give')


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ID:	79093 I shoved some steam gauges in the holes to make sure I can read them with my bifocals.


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ID:	79095 I can't sit in it until it's glued together but I'm really sure there's going to be plenty of leg and head room even with the seat installed and wearing a helmet. I think even Erkki will have plenty of room.
    Iēsous Christos, Theou Yios, Sōtēr

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    Registered User rtfm's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    Hey Fritz,
    This looks stunning, mate. It's going to be a delicate operation to sit on it, but with a seat to adequately distribute the weight, and no lateral twisting on your part, you should be able to acomplish it. Looking very forward to hearing the results.

    Cheers,
    Duncan
    ====================
    Brisbane, Australia

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    Re: The Ranger, an easily built high wing LSA runabout

    Quote Originally Posted by rtfm View Post
    Hey Fritz,
    This looks stunning, mate. It's going to be a delicate operation to sit on it, but with a seat to adequately distribute the weight, and no lateral twisting on your part, you should be able to acomplish it. Looking very forward to hearing the results.

    Cheers,
    Duncan
    There's no weight allowance for a seat. Start with a small sponge. If the craft is still too heavy, put down a doily.

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  6. #245
    Registered User ScaleBirdsScott's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    You know what, this thing is suddenly making me think of an arcade cabinet.
    Designing and Building WWII replica fighters. US Dealer for Verner Motor
    Learn more at www.ScaleBirds.com

  7. #246
    Registered User FritzW's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    Quote Originally Posted by rtfm View Post
    It's going to be a delicate operation to sit on it ...and no lateral twisting on your part
    It's hard to tell from the pictures but it's far more rigid than it looks. The seat area is a wedge instead of a box (the narrow end can't rack). It has 4 walls (two supports and the two side skins) and it has 3 'bulkheads' keeping the 4 walls vertical, and it's wider than it is tall in the seat area. There are actually 4 torque boxes under the seat keeping that area from twisting or racking. It would be hard to fail the seat area if you were trying to.


    Quote Originally Posted by rtfm View Post
    ...but with a seat to adequately distribute the weight
    Just a mental experiment: this stuff has a compressive strength of 30 psi, if I put my whole body weight on a 3" x 3" (75mm x 75mm) piece of it it wouldn't deform.

    If you take advantage of what this stuff is good at and avoid what it's bad at it's pretty amazing stuff.
    Iēsous Christos, Theou Yios, Sōtēr

  8. #247
    Registered User FritzW's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    Quote Originally Posted by billyvray View Post
    When you glue up that foam mockup, just get some fiberglass and epoxy....
    I've been trying not to think about that ...but I've been sitting here all night watching youtube videos on Moldless Composite Construction
    Iēsous Christos, Theou Yios, Sōtēr

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  10. #248
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    Re: The Ranger, an easily built high wing LSA runabout

    A layer of glass, maybe with some extra glass strips at the high stress areas (corners, rear tube mount, landing gear, attach points)....and you are good. Cheap, fast, strong enough.

    Well done, sir.

    I gotta get me one o them routers, maybe pair with a cnc hotwire too.....
    Bill Rayfield
    Newnan, Ga

  11. #249
    Registered User rtfm's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    Hey Fritz,
    Why bother with glue and glass? Sit in the thing to see if you fit. That's all you need. Unless you plan to build a composite fuse - which you aren't. Or am I missing something?

    Duncan
    ====================
    Brisbane, Australia

  12. #250
    Registered User billyvray's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    No that's just me trying to get him to do it. He has the hard part done, fitting up the foam core. Of course, if done in plywood he'd be done....but it might be heavier.

    Not trying to steal his glory.
    Bill Rayfield
    Newnan, Ga

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    Registered User FritzW's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    Don't worry Duncan, the Ranger is still ply and sticks. Sometimes you just have to let ideas (foam and glass) run their course or they'll keep haunting you.
    Iēsous Christos, Theou Yios, Sōtēr

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    Registered User Victor Bravo's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    If Fritz laminated a couple of layers of glass on both sides of the foam sheets before he cut them on the router, then there might be a valid discussion about doing this fuselage in composite. Perhaps there is some huge time-saving method to do the large flat laminations, so much so that even after you put in all the "tapes" in the corners after assembly you're still ahead of the gaame compared to a Rutan style hand layup build.

    I would still bet that using composites would fall short of wood and sheet metal if a full analysis of time, materials, and effort were done.
    "Everything in this book may be wrong."
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    "Common sense is so rare today, it should be reclassified as a superpower!"
    Derswede


  15. #253
    Registered User rtfm's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    I have vacuum infusion kit which I'm dying to use - and flat foam panels are extremely suited to either vac infusion or vac bagging. But putting it all together is a messy business. I prefer the clean, no-nonsense construction using wood.

    Fritz:
    So you've now seated yourself astride the fuselage - I assume the dimensions are adequate? I have a couple of 3mm sheets in the workshop waiting to be cut. Do you have the DXF files for this?

    Regards,
    Duncan
    ====================
    Brisbane, Australia

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    Registered User Victor Bravo's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    Yeah Fritz, not that anyone wants to apply any pressure or anything...
    "Everything in this book may be wrong."
    Richard Bach, Illusions

    "Common sense is so rare today, it should be reclassified as a superpower!"
    Derswede


  17. #255
    Registered User rtfm's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    Ha ha. No pressure, just an eager fan base... I start work next Monday, so I was hoping to make a start, that's all. But I'll have my weekends free, so there isn't any rush, to be honest.
    ====================
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