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About jon123

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  • Birthday 01/01/1959


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  1. Jet engines are becoming mainstream as sustainer engines for sailplanes - check out the Jonkers Sailplanes website. Not much range on the engine so you mad bastards may have to become real pilots and learn to soar! There are few already flying in Australia.
  2. Contact the Gliding Federation of Australia. Sailplane composite repair and rebuild has been carried out since the 1970's. (for repair info, not practicalities/legalities of powered aircraft rebuild.)
  3. I intended to teach myself (age around 12) in a home built weight shift contraption - luckily I ran out of packing case timber and plastic wrap before finishing it! First flight ever was in an army Huey at Cadet camp. Then started hang gliding at a school in the dunes at Kurnell. I lived in the NW of WA at the time so that was not going to work long term. Finally learnt to fly in a Blanik L13 (glider) at Whim Creek WA, then C152 and Jabiru (RAAus). Three 'first solo' so far!
  4. I have been advised that the test in the video was skin to spar bond test. See attached photos and videos of other tests. Much more involved than the bond test (and sandbagged wings) by the looks of it.
  5. I am a Pipistrel Sinus pilot but I'm not Michael Coates. The technology for smooth controls in bendy wings is well and truly solved in sailplanes. Browse "ETA sailplane" 30.9m span Open class or "Concordia sailplane" for extreme examples. There is some technical discussion regards solving the control route in Dick Butler's discussion on how he designed the Concordia (sorry can't find the link atm).
  6. This is an interesting video of Pipistrel's wing test (for the 15 metre span Sinus - the wing is shortened for other models).
  7. Please note the revised ASTM F2506-13 includes inflight adjustable propellers. See section 1.1.1 below “ASTM F2506 Abstract This specification covers the establishment of the minimum requirements for the design, testing, and quality assurance of fixed-pitch or ground adjustable propellers for light sport aircraft. The propeller may not have design features that have been shown to be hazardous or unreliable unless the suitability of each questionable design detail or part can be established by tests. Strength testing; stress measurement, fatigue strength, and fatigue analysis, enduranc
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