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  1. M

    Engine cooling, my solution

    Asymetric flow of cooling air under the cowling is likely to be the reason why. Some guys in France put a major effort in experientation on this topics with a bunch of sensors in the plenum to understantd what was going on. Chasing the speed demon on a four seater with a mere O 200 , they are...
  2. M

    Limbach VW Engines

    As far is know, Case is kind of "hoover modified" with extra lube gallery to the camshaft journal on the oil pump side. Piston are 90 mm with 22 mm wrist pin and long skirt
  3. M

    How would you win the Sport Racing class/why am I wrong?

    30 years ago, it was called a Pond Racer...
  4. M

    Flight Helmets?

    I might go beyond the scope of the initial question, but as a cropduster, it is not questionable : I wear an helmet, gloves (and no synthetic clothes). In my profession, the rate of crash is...huge. High speed impact are not unlikely (although agplane airframe are design to absorb a tremendous...
  5. M

    Taylor Titch Anniversary

    Thank you very much Kiwi. Very helpfull post of yours Did she laminate the upper spar cap in form , then the lower, then assemble the whole spar ? Or laminate the upper, then use them as jig to laminate the lower during assembly ?
  6. M

    Taylor Titch Anniversary

    Hi Kiwi How did your wife joined the the spars to make a one piece spar . Laminated center section, scarf joined to outer spar cap ? Or straight in , spliced to center spar cap ? What was the trick ?
  7. M

    Prosthetic Wings

    close enough ?
  8. M

    what ignition systems are people using for VW engines?

    There is a french guy , by the name of Laurent Boutin, who developped a simple electronic ignition system for vw (or other 4 bangers) engines. It was initially built so he could handprop his Jodel D-18 No fancy ignition chart. Just standard advance, or 0° advance below idle. He doesn't provide...
  9. M

    EMS module for tablet?

    Contact email not wirking. Website not updated fir the last 4 years. Sad, because i am interested.
  10. M

    EMS module for tablet?

    Very nice indeed. But not sure there are still in business
  11. M

    Tipsy Junior

    Too sad, definition doesn't allow me to read the details. But very interesting indeed. Thanks for the share
  12. M

    Wing Spar - design / bonding pultrusions

    An interesting (audacious) design by a french man for its aerobatic plane. (sorry, all in french, but pictures talk for themself). It shows the concept, the plans, the construction and method of computation... http://www.flytec.fr/longeron/ Might be more tricky to insert hard point beyond the...
  13. M

    Wooden Single Seat Aircraft Plans

    Somewhere in the late 90', we completed an overhaul on a DR315 with my boss in our samll mtx shop. At that stage, the plane was 11.000 hours + and in good shape. Probably built in the mid 70'. I saw it last summer, still showing good, still flying student pilots around for the airclub some 20+...
  14. M

    The big video topic

    My last project was to refurbish a beautifyfull GY 20 MiniCab (the ancester of the Cavalier). But my new job sent me away from home on a non commuting roster. I have flown a 1953 D9 without the current twist few decades ago. She was a delight for her 26,5 hp. But very very demonstrative when it...
  15. M

    The big video topic

    😊 Shame on me, Simflyer : you are right. The D9 and 11 series do use 23012. The 100 200 300 400 500 series use 23013,5 (all have the same dimension wing, with different spars/ flaps, air brakes settings) The D18/19/ 20 and DC21 use 43013,5
  16. M

    The big video topic

    The Jodel D11 serie (as most of the subsequent Robin serie 100 200 300 and 400) use a NACA "23013,5" Jean Delmontez, the designer tried to squeeze the biggest spar in the wing with out the penalty of the more draggy 23015. So he used a 13,5% thickness. (Some of the early Robin 400 without wing...
  17. M

    Continental O-200 EFI

    The flat spot on the intake elbow would have been a great place to plug the injector, wouldn't it ? I believe that was their purpose on the (very rare) C85 injection
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