Air Machinegun Forum
General Air Machinegun Discussion Category => Drozd and Blackbird Discussion => Topic started by: East Milford on June 18, 2017, 01:08:08 AM
-
Well today it happened, I finally broke into the eleven hundreds. Spent a lot of time tuning this machine but never broke out into the 11s. I was consistently hitting a 1030 average for many a session. I had a couple mod ideas i had yet to apply so, I hammered them out this week and decided I'd take some measurements today.
I wasn't that suprised, it was obvious that there was power to gain by just making the system more efficient. So with the added BB feed tube sleeve/bushing ( whatever you want to call it) nearly 100FPS was picked up.
This was not done with helium. This is HPA, 1600 psi output.
Has anyone registered a higjer velocity with high pressure air? Would like to hear any advice on going faster
I have a video clip but not sure how to post it, so just a picture for now
-
Must have been loud cracking the sound barrier!
-
Yes! It was. We fires it along side of a 1050 Bird, it was distinctly different than the sub sonic Drozd.
I have other really bizarre reaults to mention. It would be great if someone could provide some clarity here.
I was using a Loather Walther barrel for some accuracy teats which yielded significantly better results than my JimC and Ray smooth bore barrels.
The Loather Walther barrel smooth bore but, the bore diameter is larger than both the JimC and Ray barrel.
A Daisey BB falls through it in about half a second I estimate. ABb rolls through the other two barrels in about 1.5-2 seconds. So the LW barrel is not as tight.
Now what i find bizarre is how much more accurate the LW barrel is. Its the same length,looser fitting
Yet far superior on target
This pic below was a target shot 10-12 times with the Loather barrel, at a few feet shy of 50 yards, with a green laser for sighting.
I wont even bother posting the target from the JimC and Other barrel because the BBs were so inaccurate that several didn't even hit the oaoer.
Does anyone have any clue as to why there is such a variance? All the barrels were newish, all smooth bore, all the same length basically......WHAT GIVES!??
-
I'd love to test your metal gears, and give them a full review. I will ask politely you stop telling your Russian counterparts you are partners with Sergey though.
-
Mason, the steel gears partner well with the SB circuit boards. Idk what the hell you've mistakenly been told or what someone else lost in translation but, i dont need a 'partner' to play BB guns with.
I'm waiting your apology. Then we can talk about sending you some gears.
-
Here's my apology. Suck my dick. I hope that's good enough.
-
Wow, Some1 get a bit offended?
-
Well since he brought it up I had to block him from email, and my phone about six months ago. Let's go there Chris now that you made it public. What do I need to apologize for?
-
I don't know what gives but I want one of those LW barrels.
Great job on fps gained
It's all good
Mark
-
Yes! It was. We fires it along side of a 1050 Bird, it was distinctly different than the sub sonic Drozd.
I have other really bizarre reaults to mention. It would be great if someone could provide some clarity here.
I was using a Loather Walther barrel for some accuracy teats which yielded significantly better results than my JimC and Ray smooth bore barrels.
The Loather Walther barrel smooth bore but, the bore diameter is larger than both the JimC and Ray barrel.
A Daisey BB falls through it in about half a second I estimate. ABb rolls through the other two barrels in about 1.5-2 seconds. So the LW barrel is not as tight.
Now what i find bizarre is how much more accurate the LW barrel is. Its the same length,looser fitting
Yet far superior on target
This pic below was a target shot 10-12 times with the Loather barrel, at a few feet shy of 50 yards, with a green laser for sighting.
I wont even bother posting the target from the JimC and Other barrel because the BBs were so inaccurate that several didn't even hit the oaoer.
Does anyone have any clue as to why there is such a variance? All the barrels were newish, all smooth bore, all the same length basically......WHAT GIVES!??
You are shooting steel bb's, right? The JimC barrels are rifled, and really meant for shooting lead. I love shooting lead.
You did my bb feed tube mod? 100fps? I knew it! It also keeps the mag from puffing out when you shoot hpa.
I think Parallax hit the right note for breaking the sound barrier with HELIUM. That's what I want to try next.
-
Yeah steel bb’s. With 1600psi it is shooting 1200-1210fps at best. I have no blow-by loss because my barrel threads into the valve body face. I welded the breach nut to it then grinded it down so i can thread the barrel a few turns.
There are pics in a different thread on here.