Recent content by tsurani

rnd2, thanks for the response. you've managed to confirm my own thoughts on the matter. w.r.t ptfe, as you say, it would likely plastically deform, but not crack but i expect that under this loading environment the bulk modulus would come into play (reduction in volume), and eventually the...

Mal, Im currently in Adelaide (contracted to DSTO). Would you mind providing me with details of the aforementioned suppliers in BrisVegas? Thanks. matt.burns@dsto.defence.gov.au Cheers, tsurani "Catapultam habeo. Nisi pecuniam omnem mihi dabis, ad caput tuum saxum immane mittam."

Hi Beloka, Thanks for the suggestions. Second hand gun barrel/breech material would be of particular interest, but as yet we have come up with nothing available. Do you have any contacts? We are currently looking into forging to size, but we are already pushing the strength limits of the...

Hi all. Are there any fellow Australians in this forum? Im developing a pressure test chamber using EN25/26 steel due to its great high strength properties (and not particularly brittle). The only problem is that I cant get my hands on it in a billet with OD>250mm in Australia. I dont have six...

At this stage in the conceptual development, I dont see why not, as long as the said ceramic/carbide could withstand the aforementioned loads without brittle/impact failure. Ill be the first to admit I know little of ceramic behaviour. Could you perhaps provide data on applicable...

Hi all, I am currently searching for a composite/poylmer in the form of a cylidrical/cone geometry (~60mm diam, L~200mm) that can withstand an axial (longitudinal) pressure of up to 550MPa with little deformation over a time period of approx. 5ms. Good ol' Matweb provides stats of Kevlar with...

KLH, From basic aerodynamic theory (bernoulli), air/fluid flow increases speed as it flows around an obstacle (eg aerofoil) such that the velocity of a particle in the flow is travelling faster than the aerofoil itself, the freestream velocity. Im not sure what part of the shuttle the foam came...

Hi, Can someone please provide some insight into the behaviour of polymers (eg ABS, Nylon, Delrin) subject to very high pressures (~550MPa), while in a controlled volume (~60mm diameter x ~150mm long. Obviously there is some compression, but what happens next? I would imagine that in some more...

I would have to agree with Ed on this. Surely its a [relatively] simple beam with distributed loading and multiple supports (base and gantry). The loading would come directly from whatever spec's the launch authority has on acceptable launch conditions. ie maximum allowable wind gusts. If you...

Can anyone suggest a specific foam core (30mm) material suitable for application in a sandwich laminate with stainless steel skins (2mm) to improve impact strength AND provide some decent technical data/links? Cheers

I have recently worked as part of the assembly, integration and testing team of a government funded microsatellite project. The whole point of the exercise was to get my country back into the aerospace industry, by providing young engineers/scientists with the opportunity to develop the skills...

from someone else's past thread, you might try http://www.fas.org/man/index.html http://www.google.com/unclesam hope it helps.

Dynacon RW's were used on FedSat (recent Australian microsat)

'Janes' is definitely the goods when it comes to ammo info.

I'm afraid I'm going to have to disagree with IRstuff on this one. You must have erroneous data. My recent experience with design of APFSDS rounds suggests that the data for at least the last round on your list (M735) is most certainly inaccurate. To give an idea, the M833 (105mm APFSDS) round...