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  1. Geraldc

    Boeing - Design Issues...

    This is very worrying. Quote from article " An aviation expert said she is concerned to hear reports of the pilot saying he temporarily lost instrumentation. Passengers have reported that the pilot came back through the cabin after landing, before stating that he had lost his displays, after...
  2. Geraldc

    New Zealand

    Mandeville has an airstrip and is the home of The Croydon Aviation Heritage Centre with a small Museum and restoration workshop. A short flight from Wanaka.
  3. Geraldc

    Horrible news from Vans Aircraft

    There have been studies on this since aluminum aircraft were first built and loads of research data if you do an internet search.The Vans problem is far from new in the industry. The best tool for these searches is to specify a date range eg 1930 to 1970 to filter out the rubbish. On google page...
  4. Geraldc

    Horrible news from Vans Aircraft

    May 16 2020 Choppergirl has left the building.Not a covid casualty I hope.
  5. Geraldc

    21st century Volksplane?

    With modern materials this could be feasible. Battery motor and solar panel skin.
  6. Geraldc

    Crashes in the News - Thread

    News reports here are saying a window and part of the fuselage blew out.
  7. Geraldc

    model A engine use.

    I enquired about these a couple of years ago but they had stopped production.
  8. Geraldc

    P-Lead Wiring With Toggle Switches

    The Rotax 914 ignition switches are just like the magneto switches used by other aircraft engines. They are open when the engine is operating and grounded to stop the engine.
  9. Geraldc

    P-Lead Wiring With Toggle Switches

    Rotax 914 switches marked 7 off is shorted to earth.
  10. Geraldc

    Horrible news from Vans Aircraft

    A lot more than that . Now called Lean manufacturing and covers work flow workshop design and anything that speeds up production. Covid showed up the flaws in a system that relies on just in time stock inventories where the lack of a small part stops a whole production line. I don't know if Vans...
  11. Geraldc

    Electric and Counter Rotation

    Two counter rotating outputs can be achieved from one electric motor using one controller and one stator . The stator has magnetic fields that rotate in opposite directions at either end. https://ietresearch.onlinelibrary.wiley.com/doi/full/10.1049/elp2.12198
  12. Geraldc

    21st century Volksplane?

    The designer started with an airfoil and thought there are only 172 co-ordinates so he asked on here and got 453 pages of comments and 372 different airfoil choices and 17 suggested books on airfoil design and ended up with that.
  13. Geraldc

    What About Laser Cutting Other Materials?

    In some processes after initial oxy fuel start the cutting can continue with only oxygen .
  14. Geraldc

    Electric and Counter Rotation

    From this screenshot you can see one blade can be stopped by hand. Like in a car differential the load is shared between 2 outputs. With props in this system the load is automatically shared. In a car if you lock one wheel the free one will spin at twice the speed. In the prop drive they both...
  15. Geraldc

    Electric and Counter Rotation

    English is not Henryk's first language. Follow his links and learn from them. If I had some spare time I would experiment with this .
  16. Geraldc

    Electric and Counter Rotation

    Would be possible to build one using spider gears from a car differential. A redrive using this system gives reduction plus more thrust from 2 props .And gyroscopic forces cancel out? Could be done for same weight as normal redrive. It has been reported that torsional vibration is less with this...
  17. Geraldc

    Flying Pictures; Post Yours

    Trial flight at Coloundra Queensland 2011. This opened up a new world to me.
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