Author Topic: Inside an Air Javelin (Read 11780 times))

darkcharisma · « **Reply #20 on:** March 28, 2020, 08:00:04 PM »

I just modded the last message. Darn it I ran out of bolts as I shot down to 10mpa.

So it did net me total of 50 shots in in the 13fps spread. From 20 to 10mpa. Speed spiked a bit before I blew the last bolt.

It was accurate though at 25 yards. I hit a quarter sized washer...

Rob M · « **Reply #21 on:** March 28, 2020, 08:07:18 PM »

So the bolt failed on impact or leaving the straw barrel ? I guess they're built to the limitation of co2

darkcharisma · « **Reply #22 on:** March 28, 2020, 08:22:02 PM »

Some went through the thin archery target and shattered shaft. This last shaft I tried blew the target head off leaving only the shaft. I can see the epoxy stuff but I have no replacements. I may need to buy a bunch of shafts in the id/od required and make my own.

Rob M · « **Reply #23 on:** March 28, 2020, 08:25:32 PM »

Quote from: darkcharisma on March 28, 2020, 08:22:02 PM

Some went through the thin archery target and shattered shaft. This last shaft I tried blew the target head off leaving only the shaft. I can see the epoxy stuff but I have no replacements. I may need to buy a bunch of shafts in the id/od required and make my own.

good call.. some aluminum shafts with threaded heads

tkerrigan · « **Reply #24 on:** March 28, 2020, 08:53:51 PM »

At regulated 850-1100psi or so on air it should do better than CO2. Thinner gas, moves more quickly. Regards, Tom

tkerrigan · « **Reply #25 on:** April 03, 2020, 12:47:34 AM »

Back on the 250fps or so arrow speed, you are pushing hard and seating the arrow over the o-ring at the base of the barrel? I imagine you are but just checking. Haven't heard anybody mention it. Regards, Tom

darkcharisma · « **Reply #26 on:** April 03, 2020, 02:30:55 AM »

Yes i tried both ways. Seating it hard by the orings and free floating without the oring. Same fps.

This not worthy, i need to have more arrows...

darkcharisma · « **Reply #27 on:** April 15, 2020, 01:00:17 AM »

i managed to salvaged one bolt. and i was able to hit 325fps with the oem bolt at 6mpa or 870psi. its 220fps above that pressure. also found out regular bolts will work just fine, just a bit heavier.

Rob M · « **Reply #28 on:** April 15, 2020, 08:41:05 AM »

thats a really good gain ! awesome

grand-galop · « **Reply #29 on:** July 06, 2020, 12:36:41 AM »

Any update on your setup

darkcharisma · « **Reply #30 on:** July 06, 2020, 01:18:07 AM »

Yes I bought a bunch of aluminum and carbon bolts. I haven't had the chance to touch it again due to other projects. I didn't even bought stronger springs or make the hammer heavier. i'll get around to it but it's going to be a while.

grand-galop · « **Reply #31 on:** July 11, 2020, 09:53:42 AM »

Thanks for the precision .. That is interesting to see developments to this platform..

Kidpellet · « **Reply #32 on:** October 29, 2020, 04:58:30 PM »

I made an adapter to use the regulated bottle off one of my Gauntlets. So far so good. Also drilled and tapped an old 90 gram co2 for a fill port so it can be refilled

Kidpellet · « **Reply #33 on:** October 29, 2020, 05:06:37 PM »

Been working ok. Posted some videos to my Air Javelin FB group

Rob M · « **Reply #34 on:** October 29, 2020, 05:39:23 PM »

looks good , you running the stock 1100 pisi reg for the gauntlet tank.

Kidpellet · « **Reply #35 on:** October 29, 2020, 08:57:24 PM »

Quote from: Rob M on October 29, 2020, 05:39:23 PM

looks good , you running the stock 1100 pisi reg for the gauntlet tank.

Yep, I checked it with a reg tester and it was dead on 1100.

Rob M · « **Reply #36 on:** October 29, 2020, 09:57:45 PM »

will the stock bolts handle the pressure and if so whats the speed ? my guess is 350 ish

Kidpellet · « **Reply #37 on:** October 29, 2020, 11:59:00 PM »

Mines actually not any faster at 1100 psi. It needs a little more hammer spring although there is a hammer spring adjusting screw under the sliding stock. It works backwards though. Counterclockwise increases preload and clockwise decreases it. It's also got a pretty small planum space. Increasing that would probably do more than upping the pressure. Also it's a cast aluminum valve body and not the best for higher psi

grand-galop · « **Reply #38 on:** November 09, 2020, 03:28:29 PM »

I finally got mine..

Before receiving it, i already modded a 90g tank with a one way fill nipple..

Initial testing was like others have mentionned on here..

My surprise was when i change the target tip from 50 grain to 100 grain, the fps was more consistant and develop 33 fpe..

I have put graphene powder in the hammer slot and lower the hammer spring to get the 260fps average with the 100g target tip.

Carlito29 · « **Reply #39 on:** June 01, 2021, 04:44:27 PM »

Pretty amazing what can be done……. I will be watching this to see what transpires when the ball starts rolling again. I recently purchased AJ also and decided see if by chance someone here had Thayer it to another level. Thanks

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Inside an Air Javelin

Author Topic: Inside an Air Javelin (Read 11780 times))