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Old 04-21-2007, 05:35 PM
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Steve parkins Steve parkins is offline
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Default have a good mod ?

after blowing my hinge in the tb/gullwing door i needed a j hings.
so i put on some dark close and a mask, then ran over to the cozy girls house to Steal there design
but there was so must stuff in there shop i couldn't even find there plane!
So i got out my scale(bathroom variety) and my epoxy scale and a ruler and set to work.
i wanted small but Strong and because the door is light wight and some what flimsy i knew the spring shock would distort it, so the shock had to be part of the hinge as to not bend the door.
the math...1" out from the hinge i put a stick, and then put the scale under the stick....50 Pd's to get ambient wight
it needs 4.4 oz to get lift at the outer most spot (ie the out side handle).
my sprig shock is a 60-70 Pd's, so that gives me a little up lift when its closed all the way, Good right ?
i gave it lots of thought and i don't want any lift at close, rather I'd prefer down loading to ease in closing when seated in the back and if the lock fails it wont just pop open and depart the plane and descend to the tar-mac so i have made a temp from tag board and start to build it
it should (if my math is good) have 5 Pd's load when closed and 2 Pd's lift when fully opened, and 10 Pd's lift when opening
i will build it out of 1/8" AL
input.......................................???... ..............................Ty
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  #2  
Old 04-21-2007, 08:53 PM
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got hungry so i will up date you on the mod
(Dust said to use tin foil (SS) in place of the 1/8 AL)
so i googled the word "DUST" and sure enough, i found where it was used
on a table leg but the stuff i got just got hot when i tried to cut it
so i did like the idea of lite parts and will drive down to Costco and get the AL foil
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Old 04-22-2007, 12:35 AM
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this is going to take awhile, but what good mod doesnt ?
here is as far as i got.see pic's
i need Pepsi, I'm dying here !
i got that glass all over me...uck
i floxed in the hinges, and used a 1/4" rod to help keep theme in line
suday, i'll cut the door to fit the hinges then cut the hinges to clear the lip when fully open.
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Last edited by Steve parkins : 04-22-2007 at 12:42 PM.
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Old 04-23-2007, 07:28 PM
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Quote:
Originally Posted by Steve parkins View Post
after blowing my hinge in the tb/gullwing door i needed a j hings.
so i put on some dark close and a mask, then ran over to the cozy girls house to Steal there design
but there was so must stuff in there shop i couldn't even find there plane!
So i got out my scale(bathroom variety) and my epoxy scale and a ruler and set to work.
i wanted small but Strong and because the door is light wight and some what flimsy i knew the spring shock would distort it, so the shock had to be part of the hinge as to not bend the door.
the math...1" out from the hinge i put a stick, and then put the scale under the stick....50 Pd's to get ambient wight
it needs 4.4 oz to get lift at the outer most spot (ie the out side handle).
my sprig shock is a 60-70 Pd's, so that gives me a little up lift when its closed all the way, Good right ?
i gave it lots of thought and i don't want any lift at close, rather I'd prefer down loading to ease in closing when seated in the back and if the lock fails it wont just pop open and depart the plane and descend to the tar-mac so i have made a temp from tag board and start to build it
it should (if my math is good) have 5 Pd's load when closed and 2 Pd's lift when fully opened, and 10 Pd's lift when opening
i will build it out of 1/8" AL
input.......................................???... ..............................Ty
update; i got the j hinge off by a mile. So i add 1/4 to tb andcut off 1/4 from door. the tb is glassed and i'll start on the door tonight.
i did get the shock on and the math was good ! to bad it will take 20 hours to fit the door.
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Old 04-24-2007, 01:51 AM
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steve, keep up the pictures I am interested in this mod your doing.
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  #6  
Old 04-24-2007, 08:49 AM
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Steve, that cylinder on the J hinge is under stress when closed, right? Is there enough support on the turtle wall to keep it from eventually popping off or twisting the turtleback?

Another idea is just a hatch proprod on a slide and notch.
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Old 04-24-2007, 03:04 PM
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Quote:
Originally Posted by neverquit View Post
Steve, that cylinder on the J hinge is under stress when closed, right? Is there enough support on the turtle wall to keep it from eventually popping off or twisting the turtleback?

Another idea is just a hatch proprod on a slide and notch.
on the stock tb,no but mine is far from stock
where i put it there is spar tape loop and the is the roll bar very close to it.
i used a 60 pd shock,but it pushes 40 when closed
i have a big tap on the mount and that gets lots of flox then 2 bid 10 oz over that. you could lift your dads bigblock with it
my tb is made from 3/8 blue, not 1/4 yellow pre plans
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Old 04-24-2007, 09:40 PM
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got the door back on and tested the shock mount,,,,opps
you need hardener in this stuff ?
OK, so i redo the mount and move on
its a good way to let is set its own length, OK maybe not
i had hoped the flox was mixed OK but it was rubber, that means its 1 part to 1 part not 2 to 1
i had o'ed the scale and before it reset i added the hardener. so i looked at it, looked OK?
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Old 04-24-2007, 10:58 PM
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Are those automotive seat belts I see in picture 4?
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  #10  
Old 04-24-2007, 11:36 PM
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Quote:
Originally Posted by Riseguy View Post
Are those automotive seat belts I see in picture 4?
3 point retrakes [ mazda mpv]
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Old 04-25-2007, 01:42 AM
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Steve, The pics are wonderful... It doesn't look like you have any spraylat or other material on your canopy windows.. Don't you worry about something happening to them?

chapter 6
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Old 04-25-2007, 08:03 AM
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Default seat belts

Steve, First off I'm with you automotive seat belts should be just fine.
The problem you will find is the FAA will say they can not approved for aircraft because there is no tag authorizing their use in aircraft. At least that is my take on the regs. Better check with DAR, or FAA .
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Old 04-25-2007, 10:34 AM
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Quote:
Originally Posted by Riseguy View Post
Steve, First off I'm with you automotive seat belts should be just fine.
The problem you will find is the FAA will say they can not approved for aircraft because there is no tag authorizing their use in aircraft. At least that is my take on the regs. Better check with DAR, or FAA .
i fly with EAA not faa but if i was to certify it there would be a problem
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Old 04-25-2007, 10:38 AM
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Quote:
Originally Posted by Erick View Post
Steve, The pics are wonderful... It doesn't look like you have any spraylat or other material on your canopy windows.. Don't you worry about something happening to them?

chapter 6
i have the spray but dont use it.
i have some small bobos but it all will buff out
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Old 04-25-2007, 08:34 PM
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Sorry Steve, I did not understand you were building a mock up that will not be certified for flight.
I just assumed you were building it to fly.
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