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  1. Arfang

    Vampyr Flying Wing

    That's the composite version, the original wood and and fabric is in a barn somewhere.
  2. Arfang

    Vampyr Flying Wing

    The Vampyr is an unauthorized and modified copy of the JCD-03 Pélican. I say unauthorized because Mr Debreyer (the Pélican designer) wasn't too happy about a heavier modification and some other things, it's a long story. And copy because the set of drawings contain images of the Pélican with...
  3. Arfang

    Fauvel musings

    Apparently it is 3 mm indeed, but it represents only a small portion of the total fuselage.
  4. Arfang

    Fauvel musings

    Back to the AV-60/61. The aft fuselage portion, from the cockpit to the tail (white portion in the picture attached) is a fiberglass composite shell. Unfortunately, the drawings give no indication as to what weight and how many plies. The only information is that the plywood portion is 3 mm...
  5. Arfang

    Fauvel musings

    I stumbled across this video a couple of days ago. This thread seemed like the most appropriate to post this. That's the only video showing Charles Fauvel that I'm aware of. Moderators, feel free to move this post elsewhere.
  6. Arfang

    JetCat or Similar Small Turbine for Backup/Takeoff Propulsion

    A backup engine for what? It takes a minute or two to get the jet up and running (assuming you've primed the pump beforehand), so obviously it's not a simple 'instant thrust' button you can punch when (not if) your engine dies during take-off. If you have a glider in mind, it has been done by me...
  7. Arfang

    Could you design anything stranger?

    It is, however the picture posted is fake, the real one had ''only'' 7 engines. Russia's Monster Plane That Actually Flew | Kalinin K-7 [Aircraft Overview #11]
  8. Arfang

    Book detailing homebuilt materials/construction methods?

    Understanding Aircraft Structures, by John Cutler Aircraft Structures, prepared by Naval Air Technical Training Command A clear presentation of the different subassemblies: wing ribs, frames, fasteners, wing attachments, controls, etc. John Cutler's book also talks about materials and...
  9. Arfang

    Single Tube Fuselage idea

    Here's a canard design I found online: and here's a very rough CAD rendering of my take on the single-tube fuselage concept for a flying plank design:
  10. Arfang

    The Outboard Motorglider

    I like the idea. Jean-Claude Néglais, a french pilot with X number of hours in Fauvel gliders, once wrote that the cheapest way to get an ultralight is to find an old glider and add an engine to it. The easiest way to strap an engine to an existing glider airframe is to use the fuselage center...
  11. Arfang

    Fleas on Floats

    Since you're talking about Fleas on skis, how about a Flea glider on skis using a ski lift? It starts at 9 min 40, enjoy: It's a video about Louis Cosandey and his Flea glider. It's in French but I can translate bits if it's of interest.
  12. Arfang

    21st century Volksplane?

    I agree and as I often say when talking about technical drawing: ''The moment the machinist has to perform any calculation or walks into the office to ask you a question, you failed at your task.''
  13. Arfang

    21st century Volksplane?

    I agree on the simplicity aspect, a few thoughts on that: First, manufacturing: A good practice would be to quantify simplicity, by that I mean making a list and attribute a numerical value to the following points: Skill level required , number of jigs and fixtures, number of tools, number of...
  14. Arfang

    21st century Volksplane?

    Yes, Fused Deposition Modeling, that desktop-printer that everyone has/can make at home. I've made several non-structural parts for my K8-J/T: bushings, air inlets, fairings, etc. Peter Sripol (Foamandtape here on HBA) went further and used that manufacturing process to make parts for the...
  15. Arfang

    Five Weird Cargo Planes You've Never Heard of

    For those who want to learn more about the GAFHawk 125: Old Wings - Hawk Industries GAF-125 Gafhawk 125 Old Wings - Gafhawk 125 PR package
  16. Arfang

    Wide aft fuselage and vertical tail interference

    Recently, our member @Bill-Higdon posted a video about some lesser known transport planes: Five Weird Cargo Planes You've Never Heard of I thought that a separate thread would interfere less with the original one. We can see that at least two models (Evangel 4500 and Ahren AR-404) had a wide...
  17. Arfang

    Five Weird Cargo Planes You've Never Heard of

    I actually like those box-shaped fuselages of the Evangel 4500 and Ahrens 404. But how effective is the rudder during a stall or spin? That wide square tail section should disrupt the airflow quite a bit. I always thought that the reason why the Short Skyvan and 330 had H-tails was to put the...
  18. Arfang

    Aluminium rear spar manufacturing question

    It's one more tool to build just for a part or two, but I'll consider it.
  19. Arfang

    Aluminium rear spar manufacturing question

    Thank you all for your answers and comments, so apparently, splicing the part is the way to go. Unless I outsource the part to a company. @Victor Bravo I have mixed feelings about your idea, I like the simplicity of it, but on the other hand part of me asks how do you control the stroke to get...
  20. Arfang

    Aluminium rear spar manufacturing question

    Hi everyone, I'm wondering how to make a rear spar in home workshop conditions. I could bend a sheet to the correct angle but there is no bending brake long enough to make one bend from root to tip. Using extrusions also is not an option since extrusions are mostly available as 90 degree angles...
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