radio box lids - rc

[Guest]

Dont have access to a

Dont have access to a laith but i do have the option of thinner tube from my mate.

I'll tell him i will need 4mm thickness.

thanks andy.


adam

[koeze]

Jeff,

This is the first time

Jeff,

This is the first time I get to say this. Usually you are spot on with your info.

This time however you are dead wrong.
Acrylic or PMMA has only one property that is better than Lexan or Polycarbonate and that is that it is slightly more rigid.

PC is much tougher and as such much less prone to breaking.
The little cracks that form when you stress PMMA don't form in PC.
Holes can simply be drilled without fear that an entire corner of the lid will break.
Bending is no problem as discribed by subculture. This means that you can use it for bolt down lids without offering a way to prevent bending of the lid.

PC would definitivly be my choise for both lids and wtc if it wasn't so difficult to source here!

Erik Jan



Edited By KOEZE on 1131464204

[JWLaRue]

Erik,

I'm a polycarbonate/Lexan proponent myself,

Erik,

I'm a polycarbonate/Lexan proponent myself, so I am not trying to argue the case for acrylic. As others have also noted, acrylic can be used quite successfully for WTCs as long as it's limitations are understood. That was really the only point I was trying to make.

-Jeff

p.s. I am not a materials engineer, nor do I play one on TV.

[colin]

Thanks for the replies guys.

Thanks for the replies guys. Not sure i'm any the wiser however. you seem to be split 50/50. all i need is a lid 85x350 approx. the down side is the holes for fixing are going to be close to the edge. gulp. so i guess ill try to get lexan.
ta one and all.

[JWLaRue]

Colin,

...holes near the edge.....definitely want

Colin,

...holes near the edge.....definitely want to go polycarbonate.

-Jeff

[slats]

i use exclusively Acrylic tubes

i use exclusively Acrylic tubes for my WTC's and have experienced no problems over the years I have these in service. I have even exported a couple built up / turn key WTCs to a guy in Japan who too has never had problems.
I use 5mm thick walled stuff so maybe this is better than thinner stuff. I might point out that there are no drilled holes in the Acrylic tubes of my WTCs as that's what the end caps are for. I don't use propel as I use a sealed (non vented tank) and a impeller pump with a clippard valve.
John

[aeroengineer1]

one of the reasons that

one of the reasons that lexan is less resistant to cracking is that it is not quite aas stiff as acrylic, this gives it some ability to bend and twist before the material gives out. It is akin to tool steel; tool steel is very hard and does not like to flex too much. I have broken my fair share of drill bits, but mild steel can be bent to past 90 degree angles. This is a simple analogy of the two materials.

Adam

[tupolev]

Hi all,

I'm plannig to make

Hi all,

I'm plannig to make my own WTC. It seen that Lexan is the best way to do it. (Initially I bought an acrylic hollow rod)

Does anybody know any shop (www) that sell it ? (I know www.macmaster.com by they dont send orders outside US)

thanks !

Tupolev

[Guest]

Tupolev,

See where this goes!

Folk all

Tupolev,

See where this goes!

Folk all paranoid about using acrylic now.

If you have acrylic tubing- use it.

You really won't see any benefit in using lexan for your application.

Andy