What's With The Thin Vapor?

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Offline Hal the Elder

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What's With The Thin Vapor?
« on: March 24, 2013, 09:41:53 PM »
 
Howdy !

I was shooting in my 11-yard garage range today, sighting in my scope and firing into my steel bullet trap.  (Of course, my hits will be way low in my backyard 50-yard range, requiring re-sighting.)

I put about 20 rounds through my new Browning Leverage, alternating shots with turning the elevation and windage dials on my 3X9-40mm AO scope. I ended up with 1" groups at that distance, which satisfied me for the first time out with the new gun, and the first time I fired any airgun in 7 years!

However, every time I cocked the rifle for a new shot, when the piston slid back from the breech, a very thin wisp of vapor came out from the barrel.

Could this be from the residual oil the manufacturer left in the barrel?  I don't think its "dieseling", but maybe just a thin film of oil vaporizing from the heat of the compressed air?

What do you think?

HAL (The old-timer who's getting back into this after 7 years)







« Last Edit: March 24, 2013, 09:48:55 PM by Hal the Elder »
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Offline sperho

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Re: What's With The Thin Vapor?
« Reply #1 on: March 24, 2013, 09:44:01 PM »
It is excess oils burning off from the compression tube/piston/barrel and remnants from slight dieseling.  If you aren't hearing a loud crack when you fire, the gun isn't dieseling enough to damage anything (probably).  Common in new guns.
« Last Edit: March 24, 2013, 09:45:38 PM by sperho »
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Offline Hal the Elder

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Re: What's With The Thin Vapor?
« Reply #2 on: March 24, 2013, 09:56:25 PM »
 
I didn't hear a loud "crack"...just the slamming of the piston into the breech, the report of compressed air escaping, and the slam of the pellet into the steel trap 11 yards away.

It scared our youngest dog, who was in the house at the time!

Thanks,

HAL
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Offline thekid

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Re: What's With The Thin Vapor?
« Reply #3 on: March 24, 2013, 09:59:20 PM »
There is quite the difference between dieseling ( the presents of smoke or burnt oil smell) and detonation ( which cause the unmistakable sound of a rimfire gun).

It will diesel until all lube is burnt off, this however can play with your accuracy a bit, changing the velocity between shots, until all lube is gone.

Offline robert w

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Re: What's With The Thin Vapor?
« Reply #4 on: March 24, 2013, 10:08:19 PM »
yep i figure the first 500 shots are just luck shots till she sheds all the oil inside the chamber. by the way did you clean the barrel before you shot it? if not back up and get er done as there could be small particles of machining residue in the barrel that can get impacted in the groves affectin accuracy
in 1939 hitler said give up your guns and germany will be a safer place... then a short time after all guns were taken ,he told the jews "board the train" a word in histroy

Offline birdmove

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Re: What's With The Thin Vapor?
« Reply #5 on: March 24, 2013, 10:14:47 PM »

   So, tell us about your California Scooter Co. motorcycle there. How do you like it etc?




 
Howdy !

I was shooting in my 11-yard garage range today, sighting in my scope and firing into my steel bullet trap.  (Of course, my hits will be way low in my backyard 50-yard range, requiring re-sighting.)

I put about 20 rounds through my new Browning Leverage, alternating shots with turning the elevation and windage dials on my 3X9-40mm AO scope. I ended up with 1" groups at that distance, which satisfied me for the first time out with the new gun, and the first time I fired any airgun in 7 years!

However, every time I cocked the rifle for a new shot, when the piston slid back from the breech, a very thin wisp of vapor came out from the barrel.

Could this be from the residual oil the manufacturer left in the barrel?  I don't think its "dieseling", but maybe just a thin film of oil vaporizing from the heat of the compressed air?

What do you think?

HAL (The old-timer who's getting back into this after 7 years)
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Offline Hal the Elder

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Re: What's With The Thin Vapor?
« Reply #6 on: March 24, 2013, 11:22:47 PM »
 
HEY ROBERT,

I WANTED to run a patch through the barrel, but the 3/16" wooden dowel rod would not enter the barrel with a thin cotton patch around it, so I began shooting without cleaning the barrel.

Did I damage the rifling?

HAL

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Offline robert w

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Re: What's With The Thin Vapor?
« Reply #7 on: March 24, 2013, 11:33:00 PM »
id get some weed trimmer string or anything i could get down the barrel and tie some cotton patches on it n clean . longer you go the better chance some can be embedded in the barrel . everybody has a lot of methods to clean them but use a string with something with weight if needed to run the string down the barrel and swab the h%^^ out of it . you havent shot nuff to embed it yet but do it quick sir
in 1939 hitler said give up your guns and germany will be a safer place... then a short time after all guns were taken ,he told the jews "board the train" a word in histroy

Offline Hal the Elder

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Re: What's With The Thin Vapor?
« Reply #8 on: March 25, 2013, 12:23:16 AM »
 
HEY BIRDMOVE:

To be honest, my 250cc scooter has too much power!

I have to be careful not to twist the throttle too far, because the acceleration is frightening!  (At least to an old man like me!)

I've always ridden my last few motorcycles extremely conservatively, not exceeding 25MPH during my casual trips through my residential areas and along the Desert trails, where there is no traffic.

I'm not kidding!  When I occasionally accelerate to 30MPH, I immediately want to slow to my comfortable 20-25MPH speed! I just get a panicky feeling when I get to 30MPH!

HAL
 (This was a powerful machine, much hotter than my Mustang!  The Mustang is a 250cc single.  This Susuki Savage "Big Single" had 652cc, and frightening torque response!)

 (Google CSCMotorcycles.com for more info and pictures)
 
« Last Edit: March 25, 2013, 12:34:48 AM by Hal the Elder »
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Offline birdmove

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Re: What's With The Thin Vapor?
« Reply #9 on: March 25, 2013, 12:45:33 AM »
   You have a Suzuki Savage also. I like those too. I guess I just like thumpers. I've owned a few in my over 50 years of riding motorcycles. As for the California Scooter. They just started selling the 250cc ones. Before that they were 150cc. I saw some close up in Tacoma, Washington.
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Offline tri-5-ron

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Re: What's With The Thin Vapor?
« Reply #10 on: March 25, 2013, 12:53:02 AM »
Hey Hal
thought you might like to check these vids out, for making a DIY safe and easy AG bore cleaning line

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« Last Edit: March 25, 2013, 12:55:01 AM by tri-5-ron »
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Offline Brewerja

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Re: What's With The Thin Vapor?
« Reply #11 on: March 25, 2013, 02:54:55 AM »
thats a sweet lil scoot! I wish i could keep my bike, im having my first kid soon and my wife does NOT want me having my sportbike anymore. Shes deathly afraid of me riding out here in socal, and tearing up the canyons, palomar Mt, ortega hwy. *SIGH* Its a heavily modified kawasaki ZX9-R. The Muscle bike of the early 2000's, my first love. =( oh well. lol.
PS, you can get a .22 cal bore snake from walmart for like $8 and just wash it when it gets dirty. heh, and if you have an internal barrel/bore oring, use a set of pliers to pluck out the brass brush bristles so it dont tear up the inside barrel oring. good luck man. and keep the greasy side down on your mutter-sick'L!
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Offline Bullit

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Re: What's With The Thin Vapor?
« Reply #12 on: March 25, 2013, 11:52:50 AM »
Clean the barrel.  Weedeater line and Citric grease cutting cleanser (Goo Gone), on patches.  A few dry patches and start breaking it in.
Edit:  Forgot to mention...If you're hearing the piston slam, your pellet is too small running down the bore...or too light.
« Last Edit: March 25, 2013, 12:30:17 PM by Bullit »

Offline Hal the Elder

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Re: What's With The Thin Vapor?
« Reply #13 on: March 25, 2013, 12:44:39 PM »
 
HEY BULLIT,
 
I don't know if I'm hearing piston slam or not...all I know is that I'm hearing the "firing report", composed of whatever noise makes a firing report!

I certainly doesn't sound like any metal-to-impact.

Hal
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Offline Bullit

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Re: What's With The Thin Vapor?
« Reply #14 on: March 25, 2013, 01:01:17 PM »
The piston has a poly seal, so you shouldn't hear a steel to steel sound. 
You shouldn't hear ANY piston slam, as you posted you heard. We've responded to the terminology (Piston Slamming and Dieseling) that you have used.  Using your posted terminology,,,that's how we interpret, since we're not there with you.
 At the end of the piston's travel, there should be a bit of trapped air,,, a "cushion of air", that retards the piston, and then bleeds off and lets it settle to it's "home position", under more minimal spring tension.  Without this phenomena, we'd be buying a lot of seals!  :o  Bullit ;)
« Last Edit: March 25, 2013, 01:12:26 PM by Bullit »

Offline robert w

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Re: What's With The Thin Vapor?
« Reply #15 on: March 25, 2013, 03:01:23 PM »
as for the mist trail, sometimes even well shot guns will mist a tad . i dont think we ever get all the oil out of the chamber and if 1 sets for a month or so it sometimes redistributes around the seal and smoked a little
in 1939 hitler said give up your guns and germany will be a safer place... then a short time after all guns were taken ,he told the jews "board the train" a word in histroy

Offline OleTomCat

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Re: What's With The Thin Vapor?
« Reply #16 on: March 28, 2013, 08:53:19 PM »
The only way to truely get rid of the dieseling is to break it down, degrease completely and reassemble using lubes that do not Diesel....

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Offline kmiJ

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Re: What's With The Thin Vapor?
« Reply #17 on: March 29, 2013, 07:26:14 AM »
My leverage still smokes upon occasion...just out of the blue after a 1000 shots or more. Still trying to find replacement parts to do a tear down without much luck. Why do they sell guns and not offer replacement parts? Any way..love my Leverage except for the spring twang which I hope to take care of in the future.
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Offline Oni

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Re: What's With The Thin Vapor?
« Reply #18 on: March 29, 2013, 01:53:19 PM »
thats a sweet lil scoot! I wish i could keep my bike, im having my first kid soon and my wife does NOT want me having my sportbike anymore. Shes deathly afraid of me riding out here in socal, and tearing up the canyons, palomar Mt, ortega hwy. *SIGH* Its a heavily modified kawasaki ZX9-R. The Muscle bike of the early 2000's, my first love. =( oh well. lol.
PS, you can get a .22 cal bore snake from walmart for like $8 and just wash it when it gets dirty. heh, and if you have an internal barrel/bore oring, use a set of pliers to pluck out the brass brush bristles so it dont tear up the inside barrel oring. good luck man. and keep the greasy side down on your mutter-sick'L!

Get a scooter...seriously. 

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