BSGgeo
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Posts posted by BSGgeo
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Might have been, but so sticky that it took two people to pull it open?
Let's break out the physics... (Hopefully I remember this right...)
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Solving for P2 then gives you an internal pressure of the ammo can of 0.83 Atm. With 0 Atm being a perfect vacuum and 1 Atm being the pressure at sea level, this would be the equivilent of almost a fifth of the air getting sucked out of the ammo can. You'd probably need to do some other experiments to test this, but this seems to be a significant amount of suction, enough that with a hard-to-break seal, could be the cause for the can being hard to open.
OK, my brain is tired now...
I think the formula is right. But, you need to finish it. The top of the can is about 60 sq. inches, with a pressure difference of about 2.5 PSI. That gives you a force of 150 pounds, if you had to lift it straight up. Figure yeah, it would have been tough to open.
Things you do when bored on a business trip.....It is too cold, dark and sleeting right now to go hunting. But tomorrow.....
Allan
Altitude On Explorist 400 Question/suggestion
in GPS technology and devices
Posted
Additional load on the processor/batteries. Accuracy of the topo maps - specifically changed conditions - roads, cleared areas, developments, etc. Works in the air (airplanes, buildings, etc) where "ground" elevation would not be correct.
I have had a 400 for about two weeks, and was at a road side VADOT sign this weekend where I was 9-10' off in elevation. Not bad, considering WAAS is what, +/- 10' horizontal - at best?
Although I have not verified it, I am confident that the information used is based on position, not on the maps.
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BSGgeo