jon123

SkySight app

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.

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.)

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!

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.

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).

This is an interesting video of Pipistrel's wing test (for the 15 metre span Sinus - the wing is shortened for other models).

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, endurance testing, and teardown inspection shall be performed to meet the requirements prescribed. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. 1. Scope 1.1 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. These propellers are used on light aircraft, and could be used with engines conforming to Practice F2339. 1.1.1 When applying the additions provided in Appendix X1, this specification also covers the establishment of the minimum requirements for the design, testing and quality assurance of in-flight adjustable propellers for light-sport aircraft. 1.2 This specification is intended for use by manufacturers of propellers for light sport aircraft. 1.3 This specification does not address the airframe installation requirements for propellers. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use. 2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard. ASTM Standards F2339 Practice for Design and Manufacture of Reciprocating Spark Ignition Engines for Light Sport Aircraft Keywords light sport aircraft; propeller; ICS Code ICS Number Code 49.050 (Aerospace engines and propulsion systems) DOI: 10.1520/F2506 ASTM International is a member of CrossRef. ASTM F2506”