Q:

The T.U.R.D Coming !

Just a pic of the Tactical Utilitran Rifle Design striaght from the Voleworks design dept. This is what ive come up with …. ๐Ÿ˜•

Its .177 , 15 round mag , collapsible stock , AR grip , pump action , shrouded , 70 shot regulated and at 70cm long.

I wanted to design a gun for the guys who do ” Ratting ” as its known over here ,so its a small take down type gun to shoot rats in barns. If i get the drawings finished in the next couple of weeks the first prototype should start soon arfter on my mates new CNC machining centers .
Ive been drawing on Auto CAD for weeks , and im now experiencing the joys of learning 3D CAD ( for this and my CNC mill).
So i thought id see what you guys like / dislike because its not going to be for sale in the USA …hehe !. ๐Ÿ˜€
So what do you think !
L8r all ๐Ÿ˜€

Mods/Machinists

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Viewing 15 replies - 166 through 180 (of 185 total)

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Hi,

I put some things on “paper”:

-Piston releasing sear, hammer hits against it pretty fast, so it should be strong enough. Its back knot (6) should be measured so hammer will hit it (much?) before its backmost position. Then loading force should have some wider limits for proper cycle.
Magazines back point from pellet chamfer will set a minimum travel for loading system and I think that magazine and pellet chamfer should be as close together as possible.

-I like more BSA Super 10 pellet feeders head shape than Hornets shape (3) on picture. It needs more travel, but airflow might be better and it is easier to make. It also โ€œpenetratesโ€ better into the magazine.

-One solution for locking sliding pump could be ball locking pin mechanism inside probe shut: http://www.drillspot.com/pimages/306/30600_300.jpg
Inside block right under barrel for example (4). Take those T-handels off, fix front handle bar straight into the blue pin and other head (“yellow”) into the probe connection.

-Springs definitely need some guide (position 1), if you use it as semi-auto, those will cause trouble without guide. Make guide for all the spring travel.

-Barrel joint should be long enough.

-Safety (7?) will be โ€œsaferโ€ if it will disable middle or piston releasing sear function or even hammer moving. This way gun tolerate more impact and it wonโ€™t shoot by itself.

-Think to make some bushings on hammer and probe bore. Soft aluminium block needs hard anodizing and sometimes it wonโ€™t be enough. Some fellow got ruined his FX Revolution hammer bore for some reason, hammer chopped bore while shooting.
http://www.munkuvat.org/kuvat/60028.jpeg
http://www.munkuvat.org/kuvat/60029.jpeg
http://www.munkuvat.org/kuvat/29342.jpeg
Bushings inner diameters are easier to make smoother on lathe than trying to machine smooth bore into the block. Then bores end should be like drill shape, bushings could have same shape, this way you can use โ€œstandardโ€ drill bit, if there is enough room.

-Hammer could be symmetrical, no milling needed.
-Make trigger system as removable unit, easier/faster to take apart/overhaul.
-Pin (5) needs some sealing.

-If this was semi-auto with this trigger, it will let gun work like full auto. Hammer/loading system will cycle as long as trigger is pulled. It probably stops when pellets end or it won’t work at all. All loading system components will move no faster than hammer and when they move together, hammer might hit too slow to opening valve. Valve releases too small amount of air for proper cycle.

-Try to eliminate pellet double feed possibility. Behind pellet affects huge pressure, same pressure what pushes pellet towards muzzle pushes pellet feeder (probe) backwards. In normal situation pressure behind pellet wonโ€™t be bigger than working pressure. You can calculate how much it will push probe backwards if you know working pressure/probe diameter.
Pressure will drop fast when pellet moves, but if something blocks barrel, it will blow all air out via magazine/probe area. Therefore is important to be carefully with double feed, especially with semi-auto system. Like powder burning guns have bleeding hole in their action, this could have bleed hole/bore somewhere between magazine and pellet chamfer.

-If gun wonโ€™t have probe shut lock and it works as semi-auto, ensure junction (2) in (pellet feeder?) probe, it must be very strong (secured with glue). For example, FX Revolution approximately 70-90% of loading cycle forces comes from pressure behind pellet, 10-30% from muzzle wastage air.
If that joint (2) is too weak (and its components), it wonโ€™t last long.
When pressure will push probe backwards, probe will move all loading components weight via this small pin (jointing 2), against all springs. If gun takes some extra air (from muzzle area) for loading, it always comes โ€œtoo lateโ€.

-I think that working chamfer should rather be too big than too small. Regulator must have small holes, and if working chamfer โ€œdumpsโ€ most air every shot, then its filling might takes too long (semi-auto). If you make bigger holes into regulator, it will work too fast (then internal forces will be too big).

-Tank should be removable when pressurized, helps overhaul. If not possible make some pressure bleeding hole.

-Use magazine cheap enouhg , prototype never gives no mercy its components.

I’ll hope some of this helps!

Well im gona start this week on this ! ๐Ÿ˜ฏ , ive got no work next week so ive got to play at something . This one is slightly differant from my post but i need to make it as my 3D CAD isnt upto the job of completing the design. So its very much going to be a test rig . Ive still got to come up with a good way of holding the probe shut , need something that will lock with the sliding pump ๐Ÿ˜• . Magnets , locking lever and a spring like on the Monsoon are the ideas im toying with but i think im going to have to build it to test these out.

Hopefully i can also test out if i could get enough blowback for a semi auto if i shroud the barrel and install a valve like the Monsoon but we will see ๐Ÿ˜ฏ .
So im open to ideas …you clever ingenyous bunch !!!! ๐Ÿ˜€
L8r all

good man can,t wait to see this one getting made

Im gona start when ive finished my X axis on my mill , finished the regulator for the T4 and got enough money for a cylinder tube ! So i could be sometime unless my partner starts before me . At the moment it looks like hes having all sorts of fun with solicitors finalizing payment for his machines ……just have to wait and see how it pans out ๐Ÿ™‚

bubba mate i do like the top one mate looks pretty sweet tell me mate when r u going to start this project

Finished the design of the breach with the weever rail , still got to work abit more on the pump action and how it locks. Top has a fully adjustable butt and check piece which will be expensive and a pain to make ! ….. or the nice and cheap tube stock which i think il go with. Forend looks like it will have to be made as nothing else fits ๐Ÿ™ .

L8r all

Hi, Nice pic. of guns.RU.

When we see more custom airguns, it give us the more the drive to make one. ๐Ÿ˜€

I think the pully don’t make it , but we are going now for w good gear rack module 1, made like a swiss watch, not to do in a big prodcuction, but just for a few it’s possible, we have a long winter comming.

At the moment busy with playing with my new toy, Steyr LG110 HP. ๐Ÿ˜›

Well i didnt think my design was anything radical just filling a hole in the market for a good pump , Crossman being the only other over here ๐Ÿ˜• . FX Gladiator being the other but they dont sell over here ?.
My design looks much the same as the rest ie: gun shaped ๐Ÿ˜€ can’t get away from that .
Ewoodies design is alot differant than mine with the only thing we are sharing being the pump ( mine a straight pull and Ewoodies working on a pully system …..int you got that done yet ๐Ÿ˜€ ). Im working on the K.I.S.S princable and its still tricky.
Im hoping for contouring to be done on the breach to stop it looking like a block of alloy so the end product will look alot differant still , more a forged look like the AR15. Looks like il have to make the forend out of wood to my own size….damit.
Zombieheadhunter’s gun pic looks very intresting but very a differant desgin , can you post a link ! i wouldn’t mind having a look.
Back to drawing again ……its along slogg ๐Ÿ˜ฏ
L8r all ๐Ÿ˜€

quote Buba b:

Just a pic of the Tactical Utilitran Rifle Design striaght from the Voleworks design dept. This is what ive come up with …. ๐Ÿ˜•

Its .177 , 15 round mag , collapsible stock , AR grip , pump action , shrouded , 70 shot regulated and at 70cm long.

I wanted to design a gun for the guys who do ” Ratting ” as its known over here ,so its a small take down type gun to shoot rats in barns. If i get the drawings finished in the next couple of weeks the first prototype should start soon arfter on my mates new CNC machining centers .
Ive been drawing on Auto CAD for weeks , and im now experiencing the joys of learning 3D CAD ( for this and my CNC mill).
So i thought id see what you guys like / dislike because its not going to be for sale in the USA …hehe !. ๐Ÿ˜€
So what do you think !
L8r all ๐Ÿ˜€

As found on guns.ru:

The diameter of the remington 870 magazinetube is 25,4 mm, but you might be able to use a bigger tube with some custom work

I have an indexable cutter that i got for cutting a weaver type rail Nev.
It’s on a 20mm shank with a full box of tips.
If it’s any use, its yours.
Sean.

I have a Remington 870 – Just specify the measurements you need…

I will measure the tube when I get home, but there is a lot of space to give if you machine it out.

/Jakob

Hi, looks great,

Old dutch quote: better good stolen, than a bad design ๐Ÿ˜‰

http://talonairgun.com/forum/viewtopic.php?t=1979&highlight=proto

looks realy sweet mate can,t wiat to c the rifle in the flesh . get to it mate ๐Ÿ˜€

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