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

  1. #1
    Registered User Victor Bravo's Avatar
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    The Ranger, an easily built high wing LSA runabout

    This thread is intended to be a place for discussion, details, and design renderings specifically focused on FritzW's neat little concept for the Ranger. This is intended as a a spin-off from Erkki67's thread (for re-inventing or re-designing the Affordaplane concept to reflect more traditional design and structural practices, and creating an aircraft suitable for larger/heavier pilots).

    The Ranger concept has generated a large amount of interest, primarily because of Frtiz' beautiful renderings and innovative construction techniques. It seems to have resonated with a large number of HBA participants. So the focus of this thread is on that layout and aerodynamic concept that thas emerged from the re-invented Affordaplane thread.

    With all sincere respect for everyone involved, this thread is not intended to introduce different layouts, pusher vs. tractor discussion, two-place versions, or enclosed cabin versions. Those discussions should be entertained on OTHER threads that are not focused on the Ranger. The discussions on how best to re-design or update the Affordaplane itself should (in my opinion) take place on that original thread.

    Discussions about whether the Ranger should be wood or metal, or whether it should or should not meet Part 103, what type of landing gear, etc. are fair game for this thread.

    Discussions about whether it should be a canard, or a biplane, are not for this thread IMHO.

    With permission and participation from Fritz, Erkki67, the HBA moderators, and the active participants on the previous A-plane thread, my hope is that a thread dedicated specifically and only to the Ranger will help move this really promising design forward to the point where the design can more or less become real.
    Last edited by Victor Bravo; February 19th, 2019 at 11:14 AM.
    "Everything in this book may be wrong."
    Richard Bach, Illusions

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


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    Registered User erkki67's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    Fritz, what are the plywood qualities you are calculating with, Gabon nautical plywood or birch plywood, and if one of those, which thicknesses and sizes are you using?

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    Registered User erkki67's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    And second, is there any space available to install the controls on the tail-boom instead of in?

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

    Not to be confused with the Vashion Ranger. https://vashonaircraft.com/ranger.php


    BJC

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    Registered User erkki67's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    Sheetmetal versus Wood and some aluminium.

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

    Quote Originally Posted by BJC View Post
    Not to be confused with the Vashion Ranger. https://vashonaircraft.com/ranger.php
    Yes, I think it's preferable to confuse it with the Carl Goldberg Ranger:

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

    Good idea VB, thanks.


    A quick re-cap since it's a new thread... (there's lot's more info on the idea starting on page 6 of the A-Plane thread)

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ID:	78426 The Ranger is a mixture of Hovey's Beta Bird and an idea I have for a part 103 fun flyer called the CE.


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ID:	78429 Here's where it's at as of this morning, only about 10% done. But in fairness to me the idea is only 11 days old.


    ...hopefully I'll get a chance to work on it tonight.
    Iēsous Christos, Theou Yios, Sōtēr

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

    Is a folding wing a part of the plan?
    The most elegant theory can never change reality but even a mediocre theory can predict reality most of the time.

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    Registered User pwood66889's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    Quote Originally Posted by FritzW View Post
    Good idea VB, thanks.
    <and my thanks as well! Percy in NW FL>

    Click image for larger version. 

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ID:	78429 Here's where it's at as of this morning, only about 10% done. But in fairness to me the idea is only 11 days old.


    ...hopefully I'll get a chance to work on it tonight.
    What diameter are we looking at for that tube, Fritz? And do you have an MAC in mind??
    Last edited by pwood66889; February 19th, 2019 at 06:57 PM. Reason: clear up thanks

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

    Quote Originally Posted by FritzW View Post
    only about 10% done. But in fairness to me the idea is only 11 days old.
    So at the current rate, then...

    *Carefully marks May 29th on the calendar*

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    Registered User erkki67's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

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    ****, I want to have both!!!

    Fritz, you really don’t make life easy.

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    Registered User erkki67's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    This is what I understand under the therm of aviation and freedom.

  17. #13
    Registered User Victor Bravo's Avatar
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    Re: The Ranger, an easily built high wing LSA runabout

    erkki67, let's just get you in the air first with one of them, and then with Fritz' help we can find a way to go from "satisfaction" to "gluttony" by providing you with two airplanes

    Fritz, have you determined whether it will be possible for the Ranger to meet Part 103 and still have enough structural reserve for erkki67 (or you and me) to fly safely in turbulent mountain air? I'm guessing that's a tall order, especially with the Briggs engine on the renderings.
    "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


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

    Per the questions:

    So far all the ply is 1/8" and 1/16" Birch (or Mahogany) a/c ply. The elevator push/pull tube will go through the boom, the rudder cables will go on the outside go the tube and it'll be wood instead of sheet metal.

    The wings will fold, probably using the Air Bike folding wing plans

    The boom is 4" x .049 6061 T6 (right off the Beta Bird plans). The MAC is 50"

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ID:	78438 ...the latest idea (not set in stone) for gear/strut attach. It'd be light weight and very easy to make. A heavy duty rod end bearing with Carlson struts like the Ultra Pup. The gear could be 7075 or CF. I sent Grove an RFQ using their neat little form. ...I hate to think what the quote is going to be.

    The two obvious questions: What about the plates buckling in compression (negative G)? And what happens if you tear the gear off?

    Neither plate has room to fail in buckling. The bend in the top plate backs up against the lower longeron and the bottom plate against the flat surface on the gear. The plates can't "rack" because they're clamped to the flats on the ball in the rod end bearing.

    And, ...lot's of airplanes rely on the landing gear to secure the wings, it doesn't seem to be a problem.

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    Iēsous Christos, Theou Yios, Sōtēr

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

    If going for part 103, it might be possible to shave off a bit of weight by making a tapered boom. Also, perhaps, of a less dense material? I'll admit I haven't worked out the numbers, but unless you were to put in some sort of stringers, hoops, etc. my guess is that the tube would fail in buckling. Some amateur boat builders have been making tapered, hollow masts from staves of wood. It seems common enough that maybe it's not too hard to do. All the pieces are identical.

    I figured out that the tube would weigh something like 3/4 lbs/ft, but that might add up on a part 103 ultralight. It would of course be nifty to have one long component to attach everything to.

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