Barrel heat measurements with a suppressor and chrony

[taliv]

as part of an engineering project i'm working on, i had the opportunity to do this testing. So I figured it would be interesting to show you guys...

in the following videos I show the output of a FLIR camera aimed at a thunderbeast 30p-1 suppressor on my 260AI and 260rem, for 10 rounds fired and also the chronograph readings using a magnetospeed.

https://www.youtube.com/watch?v=DbbKZCR5GZ4
https://www.youtube.com/watch?v=WCXxHlDfaTg

I think it's interesting looking at the baffles and blast chamber on the first few rounds.

Max heat is around 230 firing relatively fast and was 215 firing a good bit slower.


I'll post more commentary later.

You can also see the difference in velocity for 260AI and 260rem here

 

[chaser_2332]

Didnt take long for the blast baffle to heat up quick! That's an awesome vid Tom.

 

[taliv]

0 95* ----- 106* -----
1 106* 3028 114* 2850
2 120* 3021 129* 2849
3 132* 3050 134* 2842
4 145* 3033 145* 2842
5 158* 3045 165* 2828
6 173* 3032 174* 2865
7 187* 3056 185* 2852
8 199* 3030 197* 2886
9 213* 3059 205* 2850
10 231* 3052 216* 2834

3040 avg 13 SD 2849 avg 16 SD

kind of hard to read because i don't know an easy way to format the data, but the first column is the shot number
the 2nd and 4th columns are the temperature reached just before the next shot is fired (for the 260AI and 260rem respectively)
the 3rd and 5th columns are velocity in fps respectively

the 1st row shows the ambient temperature of the suppressors. The 2nd one was half out of the shade of the popup tent and the front end of it shows quite a bit hotter than the back of the can in the FLIR and reads 10* hotter.

I didn't want to burn my barrel out more than necessary so I didn't continue on to 20 rounds. I imagine if I did it would keep going up in temperature. I'm not sure where it would stop, but I would expect it to plateau somewhere

it's hard to tell from the scale, but the bbl is obviously quite a bit cooler than the silencer itself.

 

[Orkan]

Very interesting testing.

 

[KingTiger]

That is very cool (wrong word) indeed!

I was playing around with a Fluke TI25 thermal imager last weekend at the hunting camp. I was planning on using it to help retrieve downed doves, but didn't have any land in the bushes.

I was getting readings of 210-220 degrees F on the lid of a Weber kettle charcoal grill after I had finished cooking, so similar temps for a reference.

I also found out it was quite good at detecting breast augmentation surgery since the silicone does not conduct heat quite as well as the rest of the body.

 

[Orkan]

That last part there had me laughing.

 

[Markm87]

Tag for more info!

 

[Charger442]

very interesting. i have a 30 BA and I have used it on my 5.56 a bunch. TBAC and Zak have said its not rated for FA and to stay with a moderate rate of fire, ie no multiple 30 round mag dumps etc. Their rule of safe operating temperature was to keep the can under 800 degrees and you'll be fine. i always wanted to get a thermal IR gauge and test just how hard it is to get it up above 500 degrees.

thanks for posting that.