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Ultralights

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Posts posted by Ultralights

  1. Once my vampire is through its major overhaul and modification schedule, i will be a regular at Goulburn!

     

    at the moment i am in the process of modifying the engine cowl with a nice big cooling air scoop and a few aerodynamic refinements, remake of the instrument panel, moulded and shaped to take a few more instruments, map pocket and drink holder. all of carbon fibre, and the usual mods, longer nosewheel, replace a few skins that are showing their age, you know, the usual stuff you do over a winters non flying season..

     

     

  2. probably find he was after an instant criminal when he went 3 kph over the limit... because apparently you die instantly if you speed now..

     

    though it is fun following freeways and highways looking down at how the other half travel..

     

     

  3. that sounds a bit strange! the secret is in the metal? if its aircraft grade aluminium it should be Alclad, the alloy is coverd with a layer of pure aluminium to help with the corrosion resistance, but any scratch, hole or cut will break the alclad and be a corrosion start point, if its not aircraft grade aluminium then it most likely would be 500 series alloy, which is a commercial grade alloy.

     

     

  4. as an aircraft sheety by trade, i have never worked on a commercial or military aircraft that has untreated aluminium, absolute minimum is Alodine/Alochrome solution treatment and zinc chromate or similar primer. bare metal finishes are usually clearcoated, heavily waxed or coated in "corroguard" its a dull aluminium coloured surface treatment it can be seen on the surfaces of the wings on most airliners, and leading edges of stabilisers. the bare metal surface of the vampire is heavily waxed, but close inspection has shown signs of mild corrosion starting to take hold on some outer surfaces, especially in areas that are regularly handled, such the wing leading edge skins near the cockpit, tailbooms and areas you grab during pre-flight checks.

     

    Even though aluminium provides its own protective layer of aluminium oxide, the oxide covering is very fragile, and where the coating is damaged, shaken loose, blown off etc , then corrosion will continue deeper in that area.

     

    at least at an absolute minimum, treat and paint the areas that touch against or join parts of the structure or other skins.

     

    for curiosity sake, the standard procedure for joining aluminum structures in Boeing aircraft is alochrome treat, zinc chromate prime, 2 coats of Polyurathane paint, then assemble wet with sealant before riviting, though Airbus and BAE use a non curing yellow barrier compound called JC5A instead of sealant. though im not sure how this would go with Recreational aircraft where weight is a prime consideration..

     

     

  5. Aircraft spruce sells a self contained strobe light for about $100, i have one on the tail of the vampire, the entire unit is about 4 inches high. all it needs is 12 Volt power.

     

     

    you can see the strobe just behind the antenna on the right tail fin.

     

     

  6. Quote from a magistrate at Sutherland Local court in Sydney, in my case after a woman drove into my van after i had reversed out of a car park and bugun to drive away..

     

    Magistrate.. I find you 100% Liable as you failed to take action to ensure the road was closed so as to prevent the possibility of an accident happening.

     

    me..to my solicitor... Is he serioues? can you imagine the chaos every day as everyone closes roads so they can leave the carpark at a shopping centre!!!

     

     

  7. Hopefully it will be like the Hunter recreation flying club i am still a member of, membership covers maintenance of the clubhouse and a $150 per annum to Cessnock council buys you 12 months unlimited use of the airfield!

     

     

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