Re: [Beowulf] materials for air shroud?

2011-08-31 Thread Lux, Jim (337C)
Plastic tape covering the aluminum.. 20 mil "pipe wrap" is useful stuff. 3M VHB double stick foam tape to hold it in place. But, enough of this feeble lash-up idea: I think the real solution is to have a second cluster doing a complete finite element model of the instantaneous temperature dis

Re: [Beowulf] materials for air shroud?

2011-08-31 Thread Robert G. Brown
On Wed, 31 Aug 2011, David Mathog wrote: > Robert G. Brown wrote > >> Also thin aluminum. > > No way, at least not anywhere near the motherboard. There isn't going > to be a way to fasten it very tightly into position, just tape probably, > possibly a zip tie at the back end. So it would be best

Re: [Beowulf] materials for air shroud?

2011-08-31 Thread Glen Beane
On Aug 31, 2011, at 5:05 PM, "Bill Broadley" wrote: > On 08/31/2011 12:15 PM, David Mathog wrote: >> That never crossed my mind. >> >> You sure about the flammability? I believe it for the ignition due to >> temperature (Fahrenheit 451 and all that). However, I have a gut >> feeling (but n

Re: [Beowulf] materials for air shroud?

2011-08-31 Thread David Mathog
Robert G. Brown wrote > Also thin aluminum. No way, at least not anywhere near the motherboard. There isn't going to be a way to fasten it very tightly into position, just tape probably, possibly a zip tie at the back end. So it would be best if the shroud cannot short things out or scratch c

Re: [Beowulf] materials for air shroud?

2011-08-31 Thread Robert G. Brown
On Wed, 31 Aug 2011, Lux, Jim (337C) wrote: Also thin aluminum. You can get aluminum sheeting that you can cut with scissors and that is easy to bend into shapes if you have a bending jig (or can make one with two pieces of board stock and a vise). Cheap, fireproof, meltproof at any temperatures

Re: [Beowulf] materials for air shroud?

2011-08-31 Thread Bill Broadley
On 08/31/2011 12:15 PM, David Mathog wrote: > That never crossed my mind. > > You sure about the flammability? I believe it for the ignition due to > temperature (Fahrenheit 451 and all that). However, I have a gut > feeling (but no data) that sparks are fairly likely to ignite cardboard, > and

Re: [Beowulf] materials for air shroud?

2011-08-31 Thread Lux, Jim (337C)
Paper doesn't catch fire at 451F.. it does start to turn brown. (Sorry Ray..) (I cook bacon on a rack over paper in a 450 degree oven.. and I doubt the temperature control is that tight) Flammability is an issue.. paper is rougher than most plastics, so a spark can lodge or a small fiber could c

Re: [Beowulf] materials for air shroud?

2011-08-31 Thread David Mathog
> Cardboard? Card stock? Masking tape? White glue? (that's what I > usually use for cooling ducts.. easy to cut, glue, tape..) It's no > more flammable than plastic, and it doesn't melt and get soft. That never crossed my mind. You sure about the flammability? I believe it for the ignition due

Re: [Beowulf] materials for air shroud?

2011-08-31 Thread Lux, Jim (337C)
Cardboard? Card stock? Masking tape? White glue? (that's what I usually use for cooling ducts.. easy to cut, glue, tape..) It's no more flammable than plastic, and it doesn't melt and get soft. Papier Mache, works too. On the other hand, if you want to mold a smooth curve, then plastic is the w

Re: [Beowulf] materials for air shroud?

2011-08-31 Thread Douglas Eadline
David, I have experimented with some simple ducting for my Limulus system. I found a Vinyl Flashing from Union Corrugating Company (purchased at Lowes home center) that has some nice features, it is bendable, holds its shape, easy to cut, and has a low carbon content (harder to burn than most plas

[Beowulf] materials for air shroud?

2011-08-31 Thread David Mathog
Anybody know of a nice cheap, high melting point, easy to work with sheet material, for making a custom air shroud? We have one box with stuff in it that looks similar to HDPE, the material the white flexible cutting boards are made of, but it is a bit thinner and more rigid that that. Unfortun