Matches in SemOpenAlex for { <https://semopenalex.org/work/W199145222> ?p ?o ?g. }
Showing items 1 to 46 of
46
with 100 items per page.
- W199145222 abstract "Abstract : A possible dependence of barrel friction on primer type was discovered in a previous project. The purpose of the present study is to quantify friction effects of three different small rifle primers (one based on lead styphnate and two based on diazodinitrophenol, DDNP). When powder is carefully selected to have a near perfect linear response between muzzle energy and powder charge, the resulting vertical intercept of a best-fit line represents the mechanical work done pushing the bullet through the rifle bore or the energy lost to barrel friction. Thus the average frictional force is simply the energy lost to barrel friction divided by the barrel length. This method determined the energy lost to friction to be 376 ft lbs (+/- 35 ft lbs) when using the Russian made (Murom) DDNP based primer and a 62 grain jacketed lead match grade bullet (Berger Flat Base), which was significantly greater than the 330 ft lbs (+/- 2 ft lbs) lost to friction using a lead-based primer (Fed 205m primer, made by ATK) with the same bullet. The American made DDNP based primer (ATK) produced a measured 322 ft lbs (+/ - 40 ft lbs) lost to friction. The large uncertainty in the friction determination with the ATK lead-free primer was caused by velocity variations and made its friction statistically indistinguishable from either the Murom lead-free primer or the Fed 205m lead-based primer. A table in the appendix summarizes bullet friction measurements to date for 13 different bullets under a variety of experimental conditions (twist rates, primer, bullet coating, etc.). Bullet friction measurements are included for the M193 and M855 bullets with and without the petroleum based sealant added between the bullet and cartridge case." @default.
- W199145222 created "2016-06-24" @default.
- W199145222 creator A5044225829 @default.
- W199145222 creator A5052667856 @default.
- W199145222 date "2014-01-30" @default.
- W199145222 modified "2023-10-14" @default.
- W199145222 title "Friction Effects of Lead-Based and Lead-Free Primers in 5.56mm NATO" @default.
- W199145222 doi "https://doi.org/10.21236/ada594429" @default.
- W199145222 hasPublicationYear "2014" @default.
- W199145222 type Work @default.
- W199145222 sameAs 199145222 @default.
- W199145222 citedByCount "2" @default.
- W199145222 countsByYear W1991452222017 @default.
- W199145222 countsByYear W1991452222023 @default.
- W199145222 crossrefType "report" @default.
- W199145222 hasAuthorship W199145222A5044225829 @default.
- W199145222 hasAuthorship W199145222A5052667856 @default.
- W199145222 hasConcept C127413603 @default.
- W199145222 hasConcept C151730666 @default.
- W199145222 hasConcept C21547014 @default.
- W199145222 hasConcept C2777093003 @default.
- W199145222 hasConcept C2781468064 @default.
- W199145222 hasConcept C86803240 @default.
- W199145222 hasConceptScore W199145222C127413603 @default.
- W199145222 hasConceptScore W199145222C151730666 @default.
- W199145222 hasConceptScore W199145222C21547014 @default.
- W199145222 hasConceptScore W199145222C2777093003 @default.
- W199145222 hasConceptScore W199145222C2781468064 @default.
- W199145222 hasConceptScore W199145222C86803240 @default.
- W199145222 hasLocation W1991452221 @default.
- W199145222 hasOpenAccess W199145222 @default.
- W199145222 hasPrimaryLocation W1991452221 @default.
- W199145222 hasRelatedWork W2022351001 @default.
- W199145222 hasRelatedWork W2030725293 @default.
- W199145222 hasRelatedWork W2063681755 @default.
- W199145222 hasRelatedWork W2169312109 @default.
- W199145222 hasRelatedWork W2410401397 @default.
- W199145222 hasRelatedWork W2469819968 @default.
- W199145222 hasRelatedWork W294504314 @default.
- W199145222 hasRelatedWork W2988803498 @default.
- W199145222 hasRelatedWork W3128217557 @default.
- W199145222 hasRelatedWork W2085184451 @default.
- W199145222 isParatext "false" @default.
- W199145222 isRetracted "false" @default.
- W199145222 magId "199145222" @default.
- W199145222 workType "report" @default.