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  #31  
Old 09-05-2007, 12:39 AM
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John Slade John Slade is offline
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

Quote:
he's the one flying' a purple kitten
No quite correct. Slick Kitten. Purple pussy.

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flatulent of overly self important individuals.
Now that's irony for ya.
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  #32  
Old 09-05-2007, 08:28 AM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

Hey T, if you want to lay up carbon fiber for your hinge, ask Chrissi or Randi how they made their fiberglass hinge for their front compartment so nice. Maybe they'll make another one or two for ya'.
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  #33  
Old 09-05-2007, 09:00 AM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

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Originally Posted by neverquit View Post
Hey T, if you want to lay up carbon fiber for your hinge, ask Chrissi or Randi how they made their fiberglass hinge for their front compartment so nice. Maybe they'll make another one or two for ya'.
Those arrived last week.
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  #34  
Old 09-05-2007, 11:06 PM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

Okay .... here's what I decided on. I ordered some 3/4 inch x 4 inch aluminum stock. In the attached drawing I'll create the red portion out of a piece that is .75 x 2.0 x 4.0
The curved part will be cut in profile from the stock as a .75 x .75 curved piece (times 4). The 4 pieces will be welded to the .75 x 2.0 x 4.0 piece.
This bolts to the canopy.
The rounded edge at the opposite end is where the hinge pin goes.

My material will be here in time for the weekend.

I have also designed a locking system that locks both the front canopy and the rear canopy at the same time ..... but that's a later post.
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  #35  
Old 09-06-2007, 02:02 AM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

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Originally Posted by TMann View Post
I have also designed a locking system that locks both the front canopy and the rear canopy at the same time ..... but that's a later post.
I kinda had the thought of making pins that came out of the front and rear lower edge of the canopy to latch it down. My only concern was unlike the Berkut locks, the canopy will sit flush even if it is unlatched... maybe some springs or something to hold it a little bit up until it is latched?
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  #36  
Old 09-06-2007, 03:25 AM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

Since theres talking goin on about latches and hinges... I'll post what i've drawn/sketched and sent off for pricing.

I am vaccilating, thinking the center locking latch and armature is too heavy and am probably goin to scrap it. The aluminum 'wrap' around the Andair fuel valve was a nice touch though.

The armature is/was connected to a auto remote electric lock unit mounted vertically next to the seat support. Simple. Arm it for flight and you're locked in. The back complete side canopy is locked down with one hardened dial knob- reachable when on the ramp from the front seat.
Theres some dual Cee and Dee hoop details if anybodies interested and etc.
Yea, the FHC hinges at the fuselage tie-in connect to a pair of horizontal plate connectors running between the IP and F28. The centers fit between a stack in the I.P middle and two 8.4" horizontal glass panels on each side. Thats the spacing/design anyway.

Hey, whats in my head may not be in yours, but if its of use to others, or causes think. Groovy.
Goodnight.
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Last edited by Dennis Passey : 09-06-2007 at 03:35 AM.
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  #37  
Old 09-06-2007, 09:00 AM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

Dear Dennis,
For the greatest "chance" of success getting a FHC to work you will want to get the hinge axis point as far forward and as far up as possible.
Forward means to within 5/8" of the aft side of F-28 and upward means taking a dremel and removing the inner skin of the top deck, remove the foam and make a good size pocket then apply 2x BID to it. Get the hinge axis within 5/8" of the top skin of the deck.
Next you need to move the cut line as far away from the hinge line as possible, move it aft.
The closer to the hinge line that the cut is, the more that portion is going to rotate forward instead of upward. Even if you get it to work (NOT) it is going to have a large gap and bind every time you try to open or close it.
When you position you canopy bubble, place it as far aft as you are comfortable with so that you have some room between the cut lin and where the bubble starts, we have a gazillion plys overlapping that area of the canopy for torsional strength.. our canopy is very light weight but also very rigid.
Follow Uli's layup schedule for the canopy, it works great.
Regards, Chrissi
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  #38  
Old 09-06-2007, 11:20 AM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

Thanks Chrissi.
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  #39  
Old 09-09-2007, 10:04 PM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

Well, my aluminum showed up Friday. I plotted my hinge drawing on full page label paper and did a peel and stick on the stock. I will cut them out as soon as my metal blades show up for my bandsaw. I made some subtle changes to the design that may eliminate the need for welding.

I'll post pics.
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  #40  
Old 09-09-2007, 11:47 PM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

See if you can find a machine tool supply place like KBC tools or similar, they have these tubes of waxy like substance you put against the metal cutting blade before you start cutting, its greatly extends blade life and makes cutting a lot easier, works on bandsaws, carbide toothed chop saws, files, hacksaws etc. Tube is about the size of a caulking cartrige, pushes out like a big wax crayon.
Regards, Chrissi
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  #41  
Old 09-10-2007, 08:45 AM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

Quote:
See if you can find a machine tool supply place like KBC tools or similar, they have these tubes of waxy like substance you put against the metal cutting blade
I go to a place that's been around for years with the old fellas in it. You know, those kind of places that get gobbled up by the big box stores. Anyway, I was told to use parafin. Old candles and such for my bandsaw blades.
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  #42  
Old 09-10-2007, 10:13 AM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

I'm investigating yet another option. It seems that this could be milled from an aluminum billet which would enable me to duplicate the original dimensions exactly.
I waiting for a quote for the billet before I decide what I'm going to do.

In the meantime, can anyone tell me what the difference is between 356 & 6061 grades of aluminum?
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  #43  
Old 09-10-2007, 10:18 AM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

before i would go to much cost, i would fabricate out of wood and hardware store stuff to insure the geometry will work

many have been surprised
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  #44  
Old 09-10-2007, 10:23 AM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

Should not be a problem with the geometry. I'm working off of the Berkut drawings.
Now, if I was to try and fabricate something different, I would make it more along the lines of a European style cabinet door hinge. That was my original idea but I decided not to reinvent the wheel.
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  #45  
Old 09-13-2007, 10:40 PM
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Default Re: N200LZ: Chapter 18 - Canopy Hinge

TMann's next car:
http://bioage.typepad.com/.shared/im...0/opelflex.png
Come to think of it, I'd like one myself.
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