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#12
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Weather Resistance
On 12-06-09 07:54, J. Clarke wrote:
Not at -60 it isn't, at least not unless you're talking about a block heater. Shut down an engine at that temperature and it's not gonna start again until spring. At least that was the case pre-synthetics--with synthetic oil it might have a chance. Block heaters are a trivial thing to install. -- -- r.p.e.35mm user resource: http://www.aliasimages.com/rpe35mmur.htm -- r.p.d.slr-systems: http://www.aliasimages.com/rpdslrsysur.htm -- [SI] gallery & rulz: http://www.pbase.com/shootin -- e-meil: Remove FreeLunch. -- usenet posts from gmail.com and googlemail.com are filtered out. |
#13
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Weather Resistance
On Fri, 12 Jun 2009 07:54:30 -0400, "J. Clarke"
wrote: Eric Stevens wrote: On Thu, 11 Jun 2009 21:09:42 -0800, (Floyd L. Davidson) wrote: Eric Stevens wrote: rOn Thu, 11 Jun 2009 07:59:39 -0800, (Floyd L. Davidson) wrote: PatM wrote: I've always wondered how much gas it would take to run my van overnight for, say, 8 hours at an idle. It gets more than 20 mpg but an even number like 20 is easier for the math. So at highway speeds, it burns roughly 3 gallons per hour. If I drove for 8 hours straight I would burst a kidney ... oh, I mean it would burn 24 gallons of fuel and be preciously near the bottom of the 25 gallon tank. So I know it would easily idle over night. So it seems, as just a guess, that it would take about 5 gallons. Anyone have any idea of what it would really take? Not a good idea with a gasoline engine. Diesel engines on the other hand are commonly run 24 hours a day. Even with diesel engines its a good way to glaze bores and increase oil consumption. Perhaps so, but compared to what happens if the engine is shutdown for 5 or 6 hours when it's -60F, that's just small potatoes. True, but a heater is the best answer. Not at -60 it isn't, at least not unless you're talking about a block heater. Shut down an engine at that temperature and it's not gonna start again until spring. At least that was the case pre-synthetics--with synthetic oil it might have a chance. At that temperature you want a tent and a hot air generator. You have not only the oil and water to worry about but the battery and the fuel as well. Eric Stevens |
#14
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Weather Resistance
Alan Browne wrote:
On 12-06-09 07:54, J. Clarke wrote: Not at -60 it isn't, at least not unless you're talking about a block heater. Shut down an engine at that temperature and it's not gonna start again until spring. At least that was the case pre-synthetics--with synthetic oil it might have a chance. Block heaters are a trivial thing to install. Generally that is true (it is not trivial to safely install circulating heaters which are a major cause of car fires), but misses the point anyway. Block heaters do not keep the oil sump warm, hence with non-synthetic oil at -60F it is possible to start the engine, but it will not get lubrication for a *long* time, if ever. Even with synthetic oil it will be longer than is reasonable (something you might do once or twice, but shouldn't even begin to think of on a regular basis). In the 1950's, before synthetic oil was available, the common trick to keeping a vehicle operational in cold weather was to remove the battery and drain the oil immediately after shutting the engine down. Both were then taken to a heated area and kept warm. The next day the engine would be pre-heated, the battery and oil were restored, and the engine restarted. -- Floyd L. Davidson http://www.apaflo.com/floyd_davidson Ukpeagvik (Barrow, Alaska) |
#15
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Weather Resistance
Eric Stevens wrote:
On Fri, 12 Jun 2009 07:54:30 -0400, "J. Clarke" wrote: Eric Stevens wrote: On Thu, 11 Jun 2009 21:09:42 -0800, (Floyd L. Davidson) wrote: Eric Stevens wrote: rOn Thu, 11 Jun 2009 07:59:39 -0800, (Floyd L. Davidson) wrote: PatM wrote: I've always wondered how much gas it would take to run my van overnight for, say, 8 hours at an idle. It gets more than 20 mpg but an even number like 20 is easier for the math. So at highway speeds, it burns roughly 3 gallons per hour. If I drove for 8 hours straight I would burst a kidney ... oh, I mean it would burn 24 gallons of fuel and be preciously near the bottom of the 25 gallon tank. So I know it would easily idle over night. So it seems, as just a guess, that it would take about 5 gallons. Anyone have any idea of what it would really take? Not a good idea with a gasoline engine. Diesel engines on the other hand are commonly run 24 hours a day. Even with diesel engines its a good way to glaze bores and increase oil consumption. Perhaps so, but compared to what happens if the engine is shutdown for 5 or 6 hours when it's -60F, that's just small potatoes. True, but a heater is the best answer. Not at -60 it isn't, at least not unless you're talking about a block heater. Shut down an engine at that temperature and it's not gonna start again until spring. At least that was the case pre-synthetics--with synthetic oil it might have a chance. At that temperature you want a tent and a hot air generator. You have not only the oil and water to worry about but the battery and the fuel as well. I assume you actually think that is true, eh? But you actually don't know *anything* about cold weather... Incidentally, what you've described is called a "heated garage". It will probably surprise you to learn that there are just as many problems with using a heated garage as there are to parking a vehicle outside in the cold. Think about water condensation... In fact, to operate vehicles at -60F requires a block heater, a heat pad on the oil pan and a heat pad on the transmission. A battery heater is not required, but it is actually a good idea to have a 1A trickle charger. An interior heater is not essential, but it is extremely nice to have. The vehicle also has to have all Arctic grade lubricants, synthetic oil, and proper coolant mix. Plus it should be parked where it can be driven forward (not reverse) to leave the parking spot, and ideally would not have a turn sharper than a few degrees for perhaps half a mile or so. -- Floyd L. Davidson http://www.apaflo.com/floyd_davidson Ukpeagvik (Barrow, Alaska) |
#16
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Weather Resistance
If he works for National Geographic do you think they worry to much
about equipment? If a piece of equipment gets wrecked it's probably chalked up as part of the expense of doing the article. |
#17
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Weather Resistance
Don B wrote:
If he works for National Geographic do you think they worry to much about equipment? If a piece of equipment gets wrecked it's probably chalked up as part of the expense of doing the article. If it gets wrecked before it gets the shot that is needed then it's chalked up to not getting the article. When you're lugging something up Everest you really don't want it to crap out 30 feet from the summit--on stuff like that you don't _get_ a do-over. |
#18
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Weather Resistance
Floyd L. Davidson wrote:
Wolfgang Weisselberg wrote: And it wouldn't at -20C (-36F) day temperatures. -20C is 36 degrees F below freezing, but freezing is at 32F, so it is actually -4F. You're right, my fault. -Wolfgang |
#19
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Weather Resistance
On Thu, 11 Jun 2009 08:40:27 -0700 (PDT), PatM
wrote: : It always seems colder in Canada. Our TV stations will report things : like it's 28 degrees in Buffalo and negative 2 in Toronto. 'Cause we (in the US) are still happy with the Fahrenheit scale. If it ain't broke, don't fix it! ;^) Bob |
#20
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Weather Resistance
On 13-06-09 08:40, Robert Coe wrote:
On Thu, 11 Jun 2009 08:40:27 -0700 (PDT), wrote: : It always seems colder in Canada. Our TV stations will report things : like it's 28 degrees in Buffalo and negative 2 in Toronto. 'Cause we (in the US) are still happy with the Fahrenheit scale. If it ain't broke, don't fix it! ;^) The US government adopted the metric system as the primary system of weights and measures in about 1890. Time folks caught up. Unfortunately they put the mother of all loopholes in that law and allowed imperial measures to continue for commerce. As a lot of trade at the time was with the UK ... -- -- r.p.e.35mm user resource: http://www.aliasimages.com/rpe35mmur.htm -- r.p.d.slr-systems: http://www.aliasimages.com/rpdslrsysur.htm -- [SI] gallery & rulz: http://www.pbase.com/shootin -- e-meil: Remove FreeLunch. -- usenet posts from gmail.com and googlemail.com are filtered out. |
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