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Forum Index > Rifles general discussion > barrel fluting / cooling fins?

barrel fluting / cooling fins?

31 May 2015
@ 10:23 pm (GMT)

Thomas Kitchen

had an odd thought the other day while stuck in traffic and thought you gents would be perfect to disguise it with.

i know the common practice is to flute barrels along the barrel but what about around the barrel the other way (like the early light machine guns) was hoping to find a picture to explain but imagine a serious of donuts stacked on top of each other or crinkle cut fries.

i figure it would really throw out harmonics but then you can have a slightly off center bore with no issues, just an odd thought and think your better off just picking right barrel weight at the start.

Replies

01 Jun 2015
@ 12:37 am (GMT)

Nathan Foster

Re: barrel fluting / cooling fins?
Whether good or bad- this would be fun to experiment with one day. As long as the grooves do not involve going under normal barrel diameter specs.

Could perhaps minimize harmonic disturbance by not having the entire barrel radial fluted, just the first 8" or so beyond the knox / parallel.

Why not- Just for the hell of it.
01 Jun 2015
@ 06:34 am (GMT)

chris murphy

Re: barrel fluting / cooling fins?
Very interesting it would definitely be more efficient for cooling (more surface area)
02 Jun 2015
@ 07:38 am (GMT)

Thomas Kitchen

Re: barrel fluting / cooling fins?
looks like ill be pricing up lathes at the field days now, cheers guys always good to know oddball ideas might be worth exploring
02 Jun 2015
@ 06:32 pm (GMT)

Barry Shone

Re: barrel fluting / cooling fins?
ER Shaw offers barrels with spiral fluting. Don't know how they perform but they look sharp.
03 Jun 2015
@ 11:11 pm (GMT)

mark whiteley

Re: barrel fluting / cooling fins?
an old Hungarian bloke I know from the range I frequent who used to make his own barrels has copper wire wound and soldered onto the first part of one of his Mauser competition rifles to dissipate heat,
I must say people on the range look at his setup and you can see the WTF in there eye's but man can he shoot,
in his day nobody came close to this guy in the comp's

best regards mark
04 Jun 2015
@ 07:26 am (GMT)

Thomas Kitchen

Re: barrel fluting / cooling fins?
cheers guys looks like ill have to have think about ways i can play around with the idea with what i got. hopefully one of my rifles doesn't end up looking like a lewis gun

that copper wire sounds interesting.

i did do some research and found some interesting fluting patterns but looks more for cosmetics then cooling.
05 Jun 2015
@ 12:32 am (GMT)

Bill Parker

Re: barrel fluting / cooling fins?
Sounds like a great idea Thomas, may be aluminium fins could be shrunk on a light barrel. With barrel fluting, does the fluting go same way as rifling or opposite ?. Should fluting & or rifling go the other way in the Southern Hemisphere ?
05 Jun 2015
@ 03:49 am (GMT)

Mike Davis

Re: barrel fluting / cooling fins?
maybe the Ruskies knew a thing or two when they decided not to machine/lathe off the hammer forging spiral grooves on the single shot Bakails...never thought of it like that before but it does give greater surface area besides looking really cool.
19 Jun 2015
@ 01:39 pm (GMT)

Warwick Marflitt

Re: barrel fluting / cooling fins?
Hey guys look at this Thompson submachine gun fluted barrel.
http://mobile.gunauction.com/displayitem.cfm?itemnum=10107093
19 Jun 2015
@ 09:25 pm (GMT)

Nathan Foster

Re: barrel fluting / cooling fins?
Heck its been a few years since I handled a Thompson. Yes, it is an interesting concept. I can feel my arm twisting.
19 Jun 2015
@ 10:00 pm (GMT)

Thomas Kitchen

Re: barrel fluting / cooling fins?
this thread gets the old gears between the ears turning alright. might be brazing copper olives ( pre made copper rings ) onto my p14 barrel before i get it changed just need a reliable way of checking temperature.

heard something the other day that aluminum dissipates heat quicker then water or oil. so now im thinking could you get to decent size plate cut out a groove for a barrel.
the after you shoot a string of shots clamp them onto barrel to cool it down quicker ( has to be a tikka owner that would think of that ).

you almost burnt out another barrel in your 700 tactical nathan might be prime barrel weight to play around with??
20 Jun 2015
@ 12:09 pm (GMT)

Warwick Marflitt

Re: barrel fluting / cooling fins?
Thomas ............Just get an old sixty litre oil drum full of water and after a few rounds open the bolt and shove rifle barrel first into the drum leaving it to cool as you roll a smoke and measure the group size? Pull it out and squirt some CRC down the tube patch it and have a few more shots. Barry crump would be proud?
13 Aug 2016
@ 07:28 am (GMT)

Thomas Kitchen

Re: barrel fluting / cooling fins?
bit of an old post but i was browsing through trademe and saw this so thought i would share it.
looks like the idea i was talking about not sure how well it works
13 Aug 2016
@ 10:12 am (GMT)

Bob Mavin

Re: barrel fluting / cooling fins?
Hot air rises, due to ( heaps of reasons) i hold my rifle vertical with the open beach facing the prevailing wind cool in no time!!!
Preferble work two rifles at the same time.
Bob
14 Aug 2016
@ 10:23 am (GMT)

trevor savage

Re: barrel fluting / cooling fins?
14 Aug 2016
@ 10:25 am (GMT)

trevor savage

Re: barrel fluting / cooling fins?
the army iw steyr has them, would love to know how well thay work. you put a few 30 round mags through fast and the barrel gets way to hot.
15 Aug 2016
@ 06:54 am (GMT)

Warwick Marflitt

Re: barrel fluting / cooling fins?
Fluting the barrel or any surface increases it's surface area and exposure to the air and allows for more thermal transfer of hot or cold into the surrounding air or liquid. If you pull the wriggling line straight it gets longer ~~~~~~~~~~~~ FWIWW ?
17 Aug 2016
@ 05:13 pm (GMT)

Bryan Webster

Re: barrel fluting / cooling fins?
Fluted barrels with poor attention to metal stress relief after fluting can also be an issue regarding accuracy/barrel harmonics.
 

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