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Thread: Canopy Lifting Arm build

  1. #101
    Senior Member Brett's Avatar
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    Thanks

    Still need to get it mounted in solid. Did a quick install for pictures and to see how things will line up and to see if any issues need to be addressed.
    I did run into a few issues but they can be fixed. As with the body the canopy is not symmetrical and I made both hinges the same(I should have known better)
    I ran out of argon gas for the welder so the mounts for the gas struts are not installed yet.

    One advantage that I've noticed is the canopy opens higher and farther forward than the stock. This is probably from the relocated pivot points and the longer arms.

  2. #102
    I like the fact that being recessed there is an inbuilt “bump stop” to stop them going over centre too.

  3. #103
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    Quote Originally Posted by Brett View Post
    Thanks

    I did run into a few issues but they can be fixed. As with the body the canopy is not symmetrical and I made both hinges the same(I should have known better)
    What were the issues, and particularly the problem with the hinges being identical; this will be usefull to know when remaking my hinges at some point... `¬)

  4. #104
    Senior Member Brett's Avatar
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    Quote Originally Posted by MartinB View Post
    What were the issues, and particularly the problem with the hinges being identical; this will be usefull to know when remaking my hinges at some point... `¬)

    Mounting holes in the top bracket were not in the same place and the angle at which the top bracket is bent at was different.


    Instead of getting the argon gas so I could weld the gas strut bracket on I spent time making a bracket for the gas strut to bolt on instead of being welded on.

    P9160001.jpg

  5. #105
    ***Euro-Nova Supporter*** Spacenut's Avatar
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    Quote Originally Posted by Sector View Post
    What is the advantage of lifting system vs front hinge pivoting?
    Richard Oakes thought that the Puma GTV system was an improvement on the Nova inasmuch as one of the canopy edges could be made to seal effectively. However, in order to do this the Puma had to seal the bonnet area and use rather ugly external hinges. In my view the Puma does not look as nice as the Nova with the canopy open, but I'm sure there are those that prefer the Italian derivative...

    Coming back to Brett's concealed hinges, having longer bars will certainly help to move the canopy further forward when open, which will definitely help with access, although in wetter climes (like here in Blighty) the canopy does help to keep the rain off

    Interesting parallels here with the Holden Hurricane concept from 1969, which also used concealed hinges for the canopy.
    only Pythagoras can save me now!

  6. #106
    Senior Member Brett's Avatar
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    Quote Originally Posted by Spacenut View Post

    Coming back to Brett's concealed hinges, having longer bars will certainly help to move the canopy further forward when open, which will definitely help with access, although in wetter climes (like here in Blighty) the canopy does help to keep the rain off
    Thought I'd respond to this and let you know my thinking and why I made that comment.

    Stock pivot points were mounted higher and because I did no calculation for the Radius, delta angle and length of the curve that the stock arms will lift and travel forward on I didn't know how the relocation of the pivot point and change in the Radius, Delta angle, and length of the curve was going to compare to the stock arms so longer arms may have not moved the canopy farther forward or higher.

    I do have some issues that I'm working out and I plan to officially call the build done in a couple of weeks and move on to my next project on the car.


    P9240001.jpg

    P9240002.jpg

  7. #107
    Senior Member Brett's Avatar
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    Quote Originally Posted by Brett View Post
    I do have some issues that I'm working out and I plan to officially call the build done in a couple of weeks and move on to my next project on the car.
    OK all issues are fixed and the lifting system works great.

    I ended up making a new set of arms
    The geometry for the lever section was not right on the first attempt and I saw no reason to waste time trying to make it work
    PA180002.jpg

    Welding thick stainless steel is more fun than welding the thin stuff. welding thick stainless steel is more forgiving to heat settings than the thin stuff.
    PA180009.jpg

    I still need to install the power assist feature but for now the manual setup works as I hoped it would.

    Gas struts will hold the canopy open with no problem
    PA230001.jpg

    Canopy travels in a level attitude all through its opening and closing sequence. The front does not want to lift as it did in the oem setup(one of the issues that I wanted to fix).
    There is a small area of travel that the struts just don't quit have enough pressure to hold the canopy still and the canopy slowly comes to a rest in this position
    PA230002.jpg

    In the closed position the canopy shows no signs of wanting to lift but with a little human help you can lift it open with little effort.

    PA230003.jpg

    Still have a little work on system(cosmetic details) but happy with the way this has turned out. Just need to get the power assist installed now.

  8. #108
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    Nice to know you are getting this sorted!

    Did you have any issues with the non-symetry left to right on the car, (you mentioned before), and if so did you need to adjust anything with the hinges, or did it not affect operation?

    Did you have any issues with 'squareness' or binding due to no play in the bearings?

    What is the problem with the front coming up first which you wanted to resolve; mine always did that by a couple of inches but never thought it was a problem?

    Love your welding, looks very neat! `¬)

  9. #109
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    Impressive piece of work there - well done.

    >>
    [..]
    Canopy travels in a level attitude all through its opening and closing sequence. The front does not want to lift as it did in the oem setup(one of the issues that I wanted to fix).
    <<


    Agreed on this, although you can argue that this is purely cosmetic and doesn't make much difference to canopy operation.
    I get a nice warm glow inside when I see a canopy opening 'level'
    ... or is that just me?

  10. #110
    Nice work Brett, better stockpile supplies for the orders that will likely follow

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