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  1. J

    Stall progression

    Well, the wing geometry plays important role, not just airfoil shape. The methods described above are suitable for mending troubles of an existing wing. If you are designing wing from scratch, I would suggest to google first for wing design using Prantl-Glauert's method.
  2. J

    Stall progression

    You have at least two feasible options: - stall center section first e.g. Zlins 26 line had 4mm wire, about 50cm long on the leading edge The wire can be held in place just by a strip of fabric + clear dope. not very well visible on photographs...
  3. J

    Chilton DW1 Build

    The reduction gear adds complexity and weight (8kg?), you can not handprop the engine. The Carden-Ford had 65kg, the G13 is 53kg bare engine. With 40 HP you do not need large propeller (propeller fitted to 'ESZ is 40" x 30"), so you save another weight and the wingtip speed goes down, no...
  4. J

    Chilton DW1 Build

    40hp is max power you can get from 1300cc DIRECT drive, if you take in account prop RPM limitations (3900RPM orig Chilton) This roughly equals european highway engine speed. 75% of max power is usually preferred cruise on aero engines. Makes no sense to use lower power, because a propeller...
  5. J

    Chilton DW1 Build

    The original Chilton had 35hp, 40 hp had the updated Train engine version, I have seen the original 35hp Chilton, and definitely was not underpowered. 100mph cruise and 650fpm climb are more than enough in my eyes. I do not believe to the reliability of any automotive conversion using...
  6. J

    Chilton DW1 Build

    Well I did not mean automotive engine with belt drive running permanently beyond its design limits, but a direct drive running at "highway" RPM and 40hp max. :) ...anyway, the O-100 appears as a good choice!
  7. J

    Chilton DW1 Build

    What about using Suzuki Geo or similar 1300CC direct drive in the same manner as the original Carden Ford 1100CC side valve was - upright direct drive? Just to install one more ball bearing + some crank extension, you can have a smaller prop turning faster. 40hp@3900RPM had the original Chilton...
  8. J

    Mráz M.1 Sokol landing gear

    Yes, the torque tube... it takes 18turns to get the gear up. Crank is on the main spar between the seats.
  9. J

    Honda/Suzuki Geo engine drawings

    Hi all, I am considering making a Honda 1500cc, or Suzuki G15-16 or Nissan conversion, I am not decided yet which one , because I need to fit the engine into a cowling. Does anybody have a suitable 3 view of some of the engines? Thank you Jan
  10. J

    Wooden Single Seat Aircraft Plans

    How about Chilton DW-1?
  11. J

    Zlin XII plans

    Thank you for watching. The plans have been SOLD.
  12. J

    Zlin XII plans

    Complete factory plans of a 1930 low wing monoplane, C-65 or similar would suit well. https://en.wikipedia.org/wiki/Zlín_Z-XII Plans are very detailed and comprehensive, more than 10lbs of printed paper.;) A replica has been built using this plans few years ago. Having someone speaking Czech...
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