View Single Post
Old July 25th, 2012, 05:20 PM
aramis's Avatar
aramis aramis is offline
Join Date: May 2001
Location: Anchorage, AK, USofA
Posts: 29,460
Gallery : 56
Visit aramis's Blog
aramis has disabled reputation
Send a message via ICQ to aramis Send a message via AIM to aramis Send a message via Yahoo to aramis

Sustained fire rate for an M-16 is limited by several factors -
it's 5 sec or more to change mags, and it's 700Rd/Min ful auto rate for a maximum of 30 rounds. (Certain individual rifles can be up to 900Rd/Min, due to variations in model, lube and wear.) 2.5 sec to fire off the clip, then 5-15 to reload, for a prepared sustained fire of 120-180 rounds per minute through full basic load... of about 120-210 rounds.

If, perchance, someone keeps feeding you clips, after a couple minutes of this, you've got a barrel that will boil water. Anecdotals online indicate 5 clips on full auto is glowing red. That's 100-120 rounds, in under 60 sec.

An M60 can bend the barrel with several minutes sustained maximum rate, too. 1000 sustained rounds is sufficient to damage the barrel. Given the 500-600Rd/Min rate...
Given 1500-2000 rounds, you should expect droop. Yep, 2-5 minutes of solid fire can result in a bent barrel. Depends upon current quality of the barrel. Also note: 1000 rounds is 10 standard 100 round belts.
Also note: on aircraft mounts, heating was MUCH less an issue - the flow of air resulted in MUCH more rapid cooling.

The Vickers MG was water cooled for a reason... keeping the barrel from heat softening.

Note also: a barrel at droop temp might continue firing without issue - until you stop. The rounds and gasses themselves can prevent the droop. Once you stop in that range, however, it's toast city.

Also, the chamber and action can overheat, resulting in premature detonation and/or "runaway fire"... if the chamber is hot enough, the round in the chamber will go off. I've seen this happen once - with an 9mm autopistol. The exposed barrel cooled nicely - the chamber didn't. And we put a couple thousand rounds downrange that day.

At the low rates traveller combat offers, you're not likely to melt barrels outside of vacuum. (Vacuum results in a lack of conductive/convective cooling.)
~ Aramis /trav
Smith & Wesson: The Original Point and Click interface!

Archduke of Sylea (CORE 2118)
Duke of the Third Imperium (SPIN 0534)
Count Terra (SOLO 1827)
Count Gorod (REFT 1302)
Count of the Third Imperium (SPIN 2232)
Viscount of Adabicci (SPIN 1824)
Marquis of the Solomani Rim (SOLO 0606)
Marquis of the Third Imperium (SPIN 2410)
Baron of the Third Imperium (SPIN 2231)
Knight of the Iridium Throne (CORE 1434)
Sir William Hostman (OLDE 0512)
Sir William Hostman (DAGU 0622)
Knight of Deneb (REFT 2239)
Knight of Deneb (Spin 2532)
SEH w/Diamonds for Extreme Heroism - Battle of Boughene
MCG - Battle of Boughene
TAS: William Hostman (CORR 2506)
TAS: Bearer (DAIB 1326)
IMTU ct+ tm++ tne tg-- tt+ tmo+ t4- t20+ to ru+ ge+ 3i+ c+ jt au ls pi+ ta he+ st+
Wil Hostman 0602 C539857-9 S A724
OTU: 95% 3i an+ au+ br- cpu± dt± f+ fs++ ge± ih- inf± j± jf+ jm+ jt+ ls- n= nc+ pi+ pp-- tp+ tr+ tv- vi-- xb+-
Unless there is bold red text, presume my posts to be my personal material only.
Reply With Quote