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  1. #71
    Airfield Ops Mick Broom's Avatar
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    Wise words Steve and covers most things.

    I am now a member of the BHPA and am thinking of not bothering with the BMAA which having belonged to the organisation for a lot longer than I can remember is a bit disappointing but things move on and you are correct we moan a lot

    Sometimes that's all you get for 70. I must get out more , forget the politics and concentrate on the project.

    Hopefully back to scratch build so we can all learn and enjoy


  2. #72
    Co-Pilot dompech's Avatar
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    One thing that I am coming to terms with during the very steep learning process is that, as my project progresses slowly on, many hours are spent reading articles and picking up hints and tips from the many other aircraft bloggers on line.
    The techniques that are used are generic across a large array of homebuilts and it is nice to have the choice of either wooden or aluminium structures to choose from. For my own project I will be utilising aluminium although the option is certainly there for a combination of building styles.


  3. #73
    Airfield Ops Mick Broom's Avatar
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    Dom,

    One of the best things David Cook did with the Shadow was use the most appreciate material for the individual bits which I think is a good way forward.

    Material choice has a lot to do with our personal skill set but also the joining methods available which can open up more opportunities for the design as improvements are found.


  4. #74
    Co-Pilot Arielarts's Avatar
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    Steve, I don't pick up much moaning about where the sport is heading. Yes, we worry that weighshift is (was) losing ground to 'plastic-fantastics', and that we see a general raising of our average age, but I think the sub-70 exemption may bring a re-invigoration to both concerns. I think it's brilliant, but then I've always liked the KISS philosophy.
    If there's a theme here, I think it's the slight, but unnecessary, one that some idiot might spoil it for the rest of us. I do think the CAA is bigger than that, and will recognise when a rogue incident is just that. Not sure about the media and politicians thogh


  5. #75
    Co-Pilot dompech's Avatar
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    I was looking to make my framework a different colour, much like the old Pegasus gold or Medway blue that was used until I found this: https://www.finishing.com/153/54.shtml
    So anodizing the tubing takes a fine film off the surface of the aluminium to bond the anodizing coating.....thus making the tubing a thinner wall thickness. It also says that the coating is more brittle than the underlying aluminium and is thus more susceptible to cyclic fatigue cracking....those cracks that appear round bolt holes. So I'm thinking maybe I won't do this.
    A long length of structural tubing that I obtained had a lot of surface scratches and had clearly been knocked about a bit. So how is the integrity of tubing that is used assured? I certainly don't want my machine falling to pieces through a stress point (deep scratch perhaps) that I didn't see. It goes without saying that the correct grade of ally will be used. I'm assuming that a different supplier that understands the importance of structural strength could supply a "cleaner" piece of tubing?


  6. #76
    Airfield Ops Mick Broom's Avatar
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    Hi Dom,
    I cannot remember the details but when I had to anodize parts including work on airplanes I used a recommended system from the local specialist . they serviced all the F1 stuff as well as specialist parts being close to Silverstone.
    Maybe ask some expert as the process does protect the tube as well .
    Sorry brain memory gone , now where did I put that spanner?


  7. #77
    Airfield Ops Muttley's Avatar
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    Quote Originally Posted by Mick Broom View Post
    Hi Dom,
    I cannot remember the details but when I had to anodize parts including work on airplanes I used a recommended system from the local specialist . they serviced all the F1 stuff as well as specialist parts being close to Silverstone.
    Maybe ask some expert as the process does protect the tube as well .
    Sorry brain memory gone , now where did I put that spanner?
    You could Alodine them. Part A and B mix.


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