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Raytol

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Posts posted by Raytol

  1. Hi Danny,

     

    It could be a Pober Pixie Twin, a version of the engine used in the original Ron Wheeler Skycraft Scout. If I remember correctly it was built using Victor lawnmower

     

    barrels, etc. Cliff Van Praag may know more about it.

     

     

  2. Unfortunately, it is real! I heard the Minister talking on the radio about it. Safety and security are the new buzz words if you want to get anything ( even the most ridiculous thing) done!

     

    I could not believe what I was hearing!

     

    They are going to increase security fencing at regional ( back of tobuggery) airports to stop those nasty terrorists from taking off in their Cessna 150 and then flying all the way to Sydney

     

    or Melbourne to blow the creama off the poor unsuspecting public's cappocino!

     

    User pay principle deems that we will be paying for it!!!!

     

    Last one at the airport can you turn off the light.

     

     

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  3. Structurally speaking, reducing the wingspan is safer than lengthening it! The bending "moments" due to lift increase incredibly with extra length. Note that adding winglets to a wing is the same

     

    structurally as increasing the span by the height of the winglet. A lot of the benefits of winglets is derived from the increase in aspect ratio of the wing.

     

    Usually, the wing span, wing loading/ power loading defines the performance of an aircraft that is mostly chosen to fit into some bureaucratic system.

     

     

    • Agree 1
  4. Hi Duncan,

     

    Try using the "marine" ply. The A-A marine has very similar allowances for manufacturing faults and has an A bond glue

     

    the only difference I could find is that the product is not heat treated to kill a bacteria in the wood ( which only exists in

     

    wet cold countries anyway!) Best ask a more expert person than me!

     

    Be careful using "Airex" foam. Ask the supplier if it is a "crosslinked" PVC foam as some of their foams are not crosslinked.

     

    The beauty of this system is that you can pre-bend or shape the foam with heat ( as in boat hulls, etc) but means the wing

     

    will sag on a hot day. Yes, I speak from experience!

     

    The best foam I have found for thin sections is called Rohr foam and it is mail ordered from Singapore.

     

    They use it in speaker cones.

     

    Ray

     

     

  5. Yes Turbo. As one of the original 44 founders of the AUF it is certainly a different world now!

     

    Gone are the days of the dawn buzzing of two-strokes over the camp site and the disappearance

     

    of the "characters" that came along with it. Now it is more "corporate", safe, responsible, insurance

     

    and lawyer driven and becoming "owned" by the people that could easily afford to fly GA but use our

     

    hard gotten system for their own ends.

     

     

    • Agree 4
  6. I'm just back from having a trade site at Airventure.

     

    I think that it was a good first effort for the organisation and improvements and changes will make the next one better.

     

    The weather was a problem for the first two days and a lot of pilots and aircraft could not get there. Jabiru not making

     

    it left a noticeable hole as I was particularly looking forward to seeing the new Gen 4 engines. The trade sites being

     

    relatively expensive did lead to a predominance of sites aimed at the "upper end of the market".

     

     

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  7. Hi Marcov,

     

    The whole IDEA behind composite structures is there ability to withstand damage!

     

    Airliners, military and Lancair aircraft components are manufactured out of a pre-impregnated

     

    fibreglass or carbonfibre material (which means the resin is already with the fibres). The process for moulding

     

    the components then includes heating the resin and honeycomb or PVC foam, under vacuum or pressure in an

     

    autoclave, which then flows and and wets the fibres and the post-cure is done as it is held at a temperature.

     

    You haven't said what sort of aircraft you are looking at but I would bet it is NOT made with pre-preg!

     

    In this case it will be wet laid, cold cured resin possibly under a vacuum bag with the post cure done in an oven.

     

    The resin system could be an Epoxy or Vinylester system, the manufacturer or any GFA repairer should be able to tell you.

     

    If the wing skins are made with a foam core then the damage often looks worse than it actually is.

     

    Send me some photo's of the damage as I can possibly save you from making more work for yourself.

     

    Ray

     

    raytolattpgdotcomdotau

     

     

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