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  1. llemon

    Today's Sketch

    Are you making your own PCBs? If so, are you doing one of that at-home methods or are you ordering custom?
  2. llemon

    Wood Monocoupe Replica?

    Jan 1994 issue from here; https://if1airracing.com/content.aspx?page_id=86&club_id=719810 Which contains the following text; "Perhaps one of the most remarkable profiles of the non-racers was that of the MIDGET MONOCOUPE, #19, a true "high-winger"look-alike of its namesake, designed and built...
  3. llemon

    Wood Monocoupe Replica?

  4. llemon

    Just how fast was the SR-71?

    Things like this have been proposed for rockets. iirc this is a pet idea of the guy who lead the design of the merlin engine for spacex. The studies I've seen for air breathing rockets use a much flatter trajectory than a normal rocket ascent.
  5. llemon

    Tail ribs

    This has the vertical; https://vr3.ca/technical-documents/
  6. llemon

    Resurrecting the Dyna-Cam

    If a wankel is a spinning dorito would this be a spinning pringle?
  7. llemon

    Could a well seasoned homebuilder build himself a vehicle that run on the streets ?

    Racing and Sports Car Chassis Design by Costin and Phipps is easy to follow and covers the basics.
  8. llemon

    Flying with a piston engine to FL 600

    I can't recall his name now, but there was a college professor from a midwestern university working on a high-alt piston record setter but he passed away before it was finished. This was within the past 10-15 years.
  9. llemon

    Anyone Seen/heard of Peter Garrison's Melmoth2 lately?

    All the info I have on melmoth. This is the various flying articles, photos, some papers https://www.mediafire.com/file/e7drnxjme37kii4/Melmoth.zip/file
  10. llemon

    Faking the curves?

    This reminds me of a system Walter Rethel of Arado came up with. A kind of stave barrel style construction; This should be doable with CAD+water jet+bending brake.
  11. llemon

    Faking the curves?

    The Davis DA-11-2 has a neat way of getting a tadpole fuselage from 3 flat wrapped sections;
  12. llemon

    Basic Calculations

    I wonder if that paper has any relation to this; https://doi.org/10.2514/8.10764 Or maybe this; https://doi.org/10.2514/8.11255
  13. llemon

    A narrow, six cylinder that can drive from both ends?

    The Onan used on the Quickie supported PTO from both ends, one side was keyed and the other tapered.
  14. llemon

    FAA Advises Using Analog NAVAIDS In Spoofing Areas

    I can't find it now, but someone has used the accelerometers and gyros on a smartphone to track a walking person given a known starting location.
  15. llemon

    Kitplanes Engine Buyer's Guide 2024.

    Where are you getting that fuel burn figure from? Their brochure gives "Fuel Burn 7.3 gal/hr (27.6 L/hr)at 135 HP Economy Cruise 10.8 gal/hr (40.9 L/hr) at 180 hp" Which is a bit worse than I would have expected from a diesel.
  16. llemon

    Three cylinder VW

    This was also done by Anzani on an experimental twin. It would be really fun to build a 4/6 cyl boxer like this and get v12 like smoothness; The Hickman referenced in the above refers to this interesting approach to the same problem. Both images from; Aircraft Piston Engines - Herschel Smith
  17. llemon

    Cowling design - preflight & maintenance access

    Some cessnas have "access doors" on the cowling for the more common stuff.
  18. llemon

    Harbor Freight Predator 670 V-Twin Horsepower tests

    They have to be square with sharp edges in order to work.
  19. llemon

    ?have any aeroplanes had missile-esque folding wings before

    Hard to beat the Arado 231 for min folded width while using a simple pivot.
  20. llemon

    A 55% SR-71 Blackbird under construction!

    How did they 3D scan an SR-71? Did they get museum permission?
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