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turboplanner

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Posts posted by turboplanner

  1. Turbo respectfully advises that Arot was no frying beercan at time since it was in the workshop being either (a) rivetted, (b) having knew (speling) splag crutch fitted or © having hourly exhaust welds, so fast late of crimb was Arot's frapping alms, which.....

     

     

  2. I notice that you haven't offered him any advice at all Skeptic.

     

    If it's so important to qualify knowledge, I was employed for five years by one fibreglass company and four years by another as a draftsman, production planner, salesman and sales manager.

     

    I mainly worked on the design and production drawings of large transport equipment which included refrigerated vans, semi vans and truck cabs, and mainly in FRP.

     

    I also did a lot of personal design and laminating

     

    The advice I gave above is based on my own experiences with laminating

     

    The attached photo, about 48 years old shows the first set of US mag style wheel covers in Australia.

     

    I made the pattern by pulling an aluminium section around a mandrel and adding dental plaster to get the round base wheel and hub shape, then laminating five FRP spokes and setting them on to the plaster with plasticene internal radii.

     

    The mould was just a lay up over the pattern.

     

    My comments about looking for undercuts to prevent a lock up once the parts are laid up in the mould was based on many experiences with screwdrivers, crow bars, and on one occasion chaining the mould to the floor and trying to pull the part out with a 6x4 truck.

     

    Although the mag wheel covers had the minimum radii and withdrawal angle required, they locked up in the mould.

     

    FRP tends to shrink very slightly when it goes off, shrinking out of concave shapes, but draping over convex shapes and gripping them.

     

    I eventually solved the problem by laminating a garden hose fitting on to the mould so full mains water pressure seeped in and gradually melted the PVA between the surfaces until enough hydraulic force was generated over enough area, and the part came out with a big "pop" about 30 minutes later.

     

    These wheel covers are also a little unusual in that I used a clear gel coat with aluminium powder filler, and got a metallic appearance.

     

    Hence my advice to look for undercuts etc.

     

     

    • Informative 1
  3. He's using foreign language; I think he means a pattern, and he is about to make a mould, so he would be laminating over it.

     

    So the surface correction opportunities are ideally on the pattern, but when the mould is laminated, recesses on the pattern will sit proud on the mould and can be sanded off, and recesses on the mould can be filled.

     

    More importantly, if checking the pattern, the mould part line(s) should be drawn on with a pencil chinagraph, and very close attention should be paid to ensure the mould shap does not undercut the pattern in any way, or you'll have a permanent garden ornament.

     

     

  4. .......but we'd heard enough; Turbo trusted Hatshat's instincts and the NES Committee has great pleasure in awarding Major Mallard the Endo award for the best BS story of the year to date. In fact it looks as if Madge had been through the capsicum spray when his photo was taken for the magazine.

     

    "We'll have to wise him up" said Hatshat, "he should have been in Canberra to make sure every magazine had a voting form in it; now he has no chance of winning".

     

    "With that face" said Turbo "there was probably a decision to put the former representative back in, and....."

     

     

  5. ....had always thought he needed meds and were surprised that he was like this even though he was already taking them.

     

    "After telling us about your great airmanship, how come you ran out of fuel?" asked Salty.

     

    "I DIDN' run out of fuel"replied Madge who could be very testy "the crap CDI's stopped working, so we put a new set on, filled it up with fuel, and they worked perfectly.

     

    "That still counts as a Rottenax failure" said Turbo, who knew he was taking a great risk.

     

    "B..................."

     

     

  6. ....0900z.

     

    Regular NES readers will notice the change in Madge. The affectation of using four posts to say something unitelligible - it was almost like he was trying for an election to high office.

     

    The Rotax stopped singing.........Madge looked at the fuel level..........it showed only Queensland air......Oh NO!!!....what.......

     

     

  7. ........."RING RING"...the early morning alarm went off and Madge woke up. He'd taken to camping in the hangar because the maintenance in the lightwing took up every waking minute. There were the daily exhaust welding chores, and retrimming the control surfaces after the rough handling.

     

    He looked around but there was no Major Blackhawk in sight, just an old red chook pecking insects off the lightwing.

     

    He became despondent, ...............

     

     

  8. Foxhunter.

     

    "Now where are my specs" asked Madge who'd been busy erasing all previous records of any transgression he might have made in the past, so no one could put the squeeze on him.

     

    "He should have looked for them before he sent in that photo" said Turbo, "Some flyers are very sensitive to gross exposures like that"

     

    This brought Ahlot to life, but Turbo had to explain the photo only showed his face.

     

    "He killed a little baby plover which had strayed onto the apron in front of his workshop once" said Harriet

     

    "Is that true?" asked Ahlot

     

    Turbo had to tell him the truth; "Yes that's right he said, reluctantly"

     

    By this time 12,000 of the 17,000 members were seriously thinking of not voting for Madge, and Turbo didn't want to raise too much dust, but Ahlot couldn't let it lie.

     

    "How did he kill it?" he asked

     

    "He leered at it" replied Turbo, and

     

     

  9. What this sounds like is quite a strong tail wind, and some inadvertent throttle; the average Jab brakes would have been overcome by this, and if you were working the lever hard all the way down the runway a seal may have burst, letting oil escape.

     

    A C150/152 can do a full stop landing on those piano keys with brakes, and landing into wind I'd expect a Jab to be able to get off at the first or second exit without using brakes.

     

     

    • Agree 1
  10. All Duncan wanted to know was the thickness of the foam used in the sandwich on the Jabiru fuselage and he thought someone might be kind enough to measure theirs.

    If that is what he had asked, and he had also given a location, he may well have received a dimension in the very next post.

     

     

    • Agree 1
    • Informative 1
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