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Type: Posts; User: JLS

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  1. I recall it came from here...

    I recall it came from here
    https://commons.wikimedia.org/wiki/File:Ford_taunus_p3.svg
    BTW this car looks "really" like a GAZ :-)
  2. I didn't know even maker or country of origin....

    I didn't know even maker or country of origin. Thanks for info!
  3. Seaplane 3 view foldable on trailer (much cheaper than Icon A5)

    In flight

    ************

    9128

    On trailer

    ************
  4. Albeit a counterintuitive task, playing with...

    Albeit a counterintuitive task, playing with polars (airspeed/rate of descent and lift/drag coefficient)
    gives you a glimpse of a glider performance.

    ********

    9110

    ********

    9112
  5. A good description of shock cords is there...

    A good description of shock cords is there
    https://www.univair.com/content/Shock-Cords.pdf

    Example with a 1080 cord:

    9071

    *******************

    9073
  6. Strength of undercarriage & bungee cord shock absorbers design and dimension.

    In an all wood fuselage design similar to RagWing Roger Mann designs or Fisher Flying products
    I'm concerned with strength of undercarriage and dimension of bungee cord shock absorbers.I didn't ...
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    Thanks for answering, PTC did the Pro Engineer...

    Thanks for answering, PTC did the Pro Engineer CAD suite (and recently Onshape Online CAD system) so I bet MathCad is a good product, and certainly old version too.
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    Computer algebra system

    Have you a prefered computer algebra system (free or not) ? There's a bunch of it nowadays
    look at
    https://en.wikipedia.org/wiki/List_of_computer_algebra_systems

    I'd prefer to have a Windows...
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    Ask help from a local EAA counselor for needs of...

    Ask help from a local EAA counselor for needs of restoring it (fabric, engine, instruments). Nevada, IA is central, and I don't know if it's wet or not. I don't know if an emeraude is rare on the...
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    20000$ on barnstormers (search "emeraude") on...

    20000$ on barnstormers (search "emeraude") on that day. This fine airplane has the most pleasant control harmony and is a joy to fly.
    Put your 5000$ in for flying it safely (extensive carry-through...
  11. Self-launching (electric) motorglider, configuration and performance question

    Cross section of fuselage is enlarged by spar and position of pilot, passenger, side by side
    semi-reclined seated.

    What is your opinion about this configuration as cross section of fuselage is...
  12. Thread: Electric Nieuport?

    by JLS
    Replies
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    7,953

    Fitting Graham Lee datasheet with rotax 503...

    Fitting Graham Lee datasheet with rotax 503 numbers gives you a CD0=0.07 (parasitic and interference
    drag of whole aircraft). It gives a L/D ratio of 7 (with induced drag K=0.0725), so I trust you...
  13. Thread: Electric Nieuport?

    by JLS
    Replies
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    7,953

    It seems that high end(pricey) solutions for...

    It seems that high end(pricey) solutions for electric aircraft (engine, battery and its controller) come
    from here:
    https://www.mgm-compro.com/

    30-50kw electric motor...
  14. Thread: Electric Nieuport?

    by JLS
    Replies
    22
    Views
    7,953

    I did a spreadsheet for the Graham Lee Electric...

    I did a spreadsheet for the Graham Lee Electric Nieuport 11, it may work for a
    Lithium Nickel Manganese Cobalt Oxide Battery at 0.22KWh/kg (that is quite
    optimistic).

    Graham Lee Nieuport XI...
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    As seen in South Africa "kitplanes for africa". ...

    As seen in South Africa "kitplanes for africa".

    With a tight fit, I don't see why it wouldn't work (and examples are flying).

    8838

    I must admit my proposition has a flaw, you don't have to...
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    Here are some notes and calculus. These are SVG...

    Here are some notes and calculus.
    These are SVG files, I advise you that to download them you should open them with a recent
    navigator (Chrome, Firefox, MS Edge). There is no danger of computer...
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    I'm interested in as strength as possible so...

    I'm interested in as strength as possible so 0.083" with wood doubler is my choice.
  18. Replies
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    Thanks for sharing but this tube is for wing...

    Thanks for sharing but this tube is for wing spars, 0.083" wall is for strength, (0.035" and 0.065" wall is too thin, 0.125" is
    too heavy).2"-1/2 OD is for leading edge radius.
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    I found https://www.tubeservice.com/ (from a...

    I found https://www.tubeservice.com/ (from a thread on homebuiltairplanes.com)
    This reference is on their catalog.

    If you have another one, I appreciate your sharing it if you want.

    Thanks...
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    looking for 6061T6 2"-1/2 OD 0.083" wall tube

    I'm looking for 6061T6 2"-1/2 OD 0.083" wall tube and can't find it. (0.065" or 0.125" wall
    only). I looked at aircraftspruce, wicks and onlinemetals. Have you some addresses ?

    Thanks in advance...
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    Hiscocks "Design of light aircraft" Chapter 5

    "Design of light aircraft" from Richard Hiscocks can be an entry to design tail and have
    loads on it. I worked chapter 5 on flight envelope quite hard on an own design
    until I made a spreadsheet...
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    Thank you for your post Mike. Did you follow...

    Thank you for your post Mike.

    Did you follow Earl Luce advices on cutting 4130 tube (videos
    on eaa.org) or did you produce your own methods (notcher
    lathe or others) ?

    No answer from Mike,...
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    Thank you. I saw your logs of the Buttercup...

    Thank you. I saw your logs of the Buttercup project on wingsforum, and its quality is impressive.
  24. Replies
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    I couldn't imagine anything better than this book...

    I couldn't imagine anything better than this book for my issue. Thank you for your help.

    A more convenient drawing of the cluster A is below. It seems that upper longeron should be bent and not ...
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    For sure, thanks for the information. I'm a great...

    For sure, thanks for the information. I'm a great fan of wittman designs.
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