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  • Users: Dawes
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  1. Dawes

    Engine oil question

    My Ford Ranger ( 4 cylinder inline engine) calls for 5W-20 engine oil. The factory knows far better than I, but it just seems a bit thin to me. Is there any reason that this grade would be more desirable than, say, 10W-30?
  2. Dawes

    Aluminum armor

    Doing some research and was unable to find out what alloys were used in that type of application. I think you answered my question. Thanks.
  3. Dawes

    Aluminum armor

    Aluminum armor is used in some military vehicle applications where weight is an important consideration, such as applique armor packages. In fact, the basic vehicle structure of the Bradley and M113 APC's is aluminum. Is there a narrow range of alloys suitable for this application, or is there...
  4. Dawes

    Air-cooled diesels

    www.defensepropulsion.com/avds-1790_-_1200_hp.html I once heard that air-cooled diesels in a hot environment (i.e. desert) can have overheating problems. Id this perhaps overstated?
  5. Dawes

    Caterpillar light truck engine?

    Since Cummins seems to be successful with their light-truck diesels (primarily in Dodge pickups), why didn't Caterpillar try to enter this market? Would it have entailed designing a suitable engine from scratch, or maybe an existing engine could have been adapted for this application? Or is...
  6. Dawes

    Post 1945 steel vs pre-1945 steel

    Gentlemen; Pardon the arcane question, but I'd like to get input from the experts on this one: http://uboat.net/fates/deadlight_news.htm The article indicates (and I've heard) that steel manufactured after the atomic age began in July 1945 contains certain contaminates. These are evidently in...
  7. Dawes

    Heat treatment/manufacturing process of the 1903 Springfield

    www.cruffler.com/trivia-July00.html Any comments on the heat treatment process described? Did it lend itself to inconsistencies any more than others of the period?
  8. Dawes

    Firearms steel: Domestic vs import

    Well, it's certainly hard to beat their prices. The Ithaca 37 version has a machined steel receiver and steel trigger housing, and can be had for around $200 or so. Fit and finish appears to be well executed also. Machined parts (versus cast, MIM, etc.) in US production guns really send costs...
  9. Dawes

    Firearms steel: Domestic vs import

    This is kind of a left-field question, but maybe someone is familiar: The Chinese company Norinco has produced copies of various firearms that are exported to the US. Now, it's chiefly copies of the Remington 870, Winchester 97, and Ithaca 37 shotguns. While they're usually quite reasonably...
  10. Dawes

    Cartridge cases

    Most cartridge cases used by the US militarey today are made from brass, with some medium calibers (25mm, 30mm) using aluminum. Russia and most of the former East Bloc nations use steel. Steel would probably be a bit cheaper than brass, but is more susceptible to corrosion. Since steel seems to...
  11. Dawes

    Chrome-lining of gun barrels

    Many types of military firearms have chrome-lined barrels. This (from my understanding) increases barrel life to some extent and makes cleaning a bit easier. It also protected the barrel better from the effects of corrosively-primed ammunition, although this is probably a non-issue nowadays. Is...
  12. Dawes

    1095 Carbon/420 Stainless

    I've got a question which is along the lines of trivia, but maybe someone can provide some input: The military's M9 bayonet is made from 420 Stainless, while the older M7 bayonet is 1095 Carbon steel. What are the relative merits of each in this particular application, and would one be superior...

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