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Perspex/Acrylic
I have a query regarding perspex/acrylic and equivalents for aircraft side windows.
For a given thickness of material, are some products more rigid than others?
The old side window I am to replace (2 mm thick) in my Vagabond is much more rigid than the new acrylic window I want to install.
TonyN
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Re: Perspex/Acrylic
Acrylic gets brittle with age. New acrylic should be more flexible. I prefer polycarbonate (Lexan) for skylights and doors. Straight windows I use acrylic.
"You can only tie the record for flying low."
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Re: Perspex/Acrylic
2 mm is .08 inch, 8/100's which is a bit thin.
Last edited by Stephen; 11-21-2017 at 10:55 AM.
"You can only tie the record for flying low."
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Re: Perspex/Acrylic
I will have to check the Piper drawing to see what was originally specified, but 2 mm thick side window is what has been installed for, at least, the past 45 years!
TonyN
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Re: Perspex/Acrylic
Hi,
Allowable manufacturing thickness tolerances for Acrylic sheet have closed over the years, but still vary enough to feel.
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Re: Perspex/Acrylic
I think my side windows are 1/4 inch thick. That works out to like 6 mm. Of course, I own a tripacer not a vag.
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Re: Perspex/Acrylic
Aircraft Spruce does sell acrylic as thin as .06. Which is 1.5 mm.
"You can only tie the record for flying low."
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Re: Perspex/Acrylic
Ha! Try explaining to a 23 year old grandson what a "foot" is. He has only ever been exposed to metric so imperial is a complete mystery.
Bit of a worry as imperial is still used here for bolts and screws! (in addition to metric)
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Re: Perspex/Acrylic
Having transitioned from imperial to metric I still think in imperial units.
Seems easier to visualise how long 5 ft 10 in is rather than how long 1.78 metres is!
I looked at the original Piper drawing for the Vagabond side window and although not specified it looks most likely 1/8".
As my Vagabond was imported into France from new it is likley the French replaced the side window with 2 mm perspex but added some rubber strip along the edge.
Will measure again...
TonyN
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