Quite a while ago I completed my 9mm form 1. Thread is in the forum somewhere. It had a griffin taper mount rear cap because well it seemed like a good idea at the time. I haven't shot it much because it needed a booster. So I made a booster!
True value had a huge selection of springs. Still wound up with basically what I intended and it works! Spring is 1.5in long. Preload of .4in. .080 diam wire and .875 OD
No drawings on this one just seat of the pants and napkin sketches.
Another Nielsen/LID
- T-Rex
- Silent But Deadly
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Re: Another Nielsen/LID
Nice work.
Why didn't you allow the gas to use the space inside of the booster?
Pic of inside the taper-mount adapter?
What tolerance did you use between piston OD and taper-mount adapter?
Any blowback?
Why didn't you allow the gas to use the space inside of the booster?
Pic of inside the taper-mount adapter?
What tolerance did you use between piston OD and taper-mount adapter?
Any blowback?
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Re: Another Nielsen/LID
I kept it sealed at the moment mostly due to crud. And the minimal expansion volume I don't think will make enough difference to make the crud in the spring area worth it.T-Rex wrote:Nice work.
Why didn't you allow the gas to use the space inside of the booster?
Pic of inside the taper-mount adapter?
What tolerance did you use between piston OD and taper-mount adapter?
Any blowback?
What pics would you like? I'm happy to take more.
.003 tolerance. .626 bore and .623 piston. I imagine if I ran a whole lot of ammo through it in a hurry it might seize being that tight.
Only function tested yesterday. Doesn't seem to be too bad from a blowback standpoint. I'll video when I can get to the range rather than test firing in the garage.
- Capt. Link.
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Re: Another Nielsen/LID
NICE!
-CL
DD progress?
-CL
DD progress?
The only reason after 243 years the government now wants to disarm you is they intend to do something you would shoot them for!
http://www.silencertalk.com/forum/viewtopic.php?f=10&t=79895
http://www.silencertalk.com/forum/viewtopic.php?f=10&t=79895
- T-Rex
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- Location: CT - The AntiConstitution State
Re: Another Nielsen/LID
Yeah, no sh*t.Capt. Link. wrote:NICE!
-CL
DD progress?
I have that page bookmarked.
Thanks for bringing it up Capt.
Completed Builds www.silencertalk.com/forum/viewtopic.php?t=79895
Burst Calculator www.engineersedge.com/calculators/pipe_bust_calc.htm
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Burst Calculator www.engineersedge.com/calculators/pipe_bust_calc.htm
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Re: Another Nielsen/LID
I'll post some pics of progress. Finances have slowed progress heavily. Even doing it yourself mortars are spendy...T-Rex wrote:Yeah, no sh*t.Capt. Link. wrote:NICE!
-CL
DD progress?
I have that page bookmarked.
Thanks for bringing it up Capt.
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Re: Another Nielsen/LID
Nice work! I think the form1 community would certainly benefit from a diy booster! Any way we can get you to draw up a sketch?
www.julietdeltacustoms.com
Juliet Delta Customs - Custom built solvent traps, cups, direct thread mounts, and much more.
[email protected] or [email protected]
Juliet Delta Customs - Custom built solvent traps, cups, direct thread mounts, and much more.
[email protected] or [email protected]
Re: Another Nielsen/LID
Unfortunately, unless someone made a taper mount rear cap it wouldn't be of much use as designed. It would have to be built around their rear cap or redesigned to function as a standalone for say a sub gun can.JulietDeltaCustoms wrote:Nice work! I think the form1 community would certainly benefit from a diy booster! Any way we can get you to draw up a sketch?
If someone needed help designing one for their own can I could certainly help with that. They aren't as complicated as people would have you believe.
Re: Another Nielsen/LID
You did good!!! I just "barely" understand what the booster does, and no idea how to make one. Your photos are the first I've seen inside. Thanks for posting.
Ken H>
Ken H>
Re: Another Nielsen/LID
While linear inertial decoupler sounds fancy, at the end of the day its a damn shock absorber. Concentricity of the parts is important, tolerance is important and the faces need to be square. After making one, the "mystique" around them is BS in my opinion. Start around 25lb/in and then make sure the slide locks back. If it does with ease you can probably go up a little in spring tension, if it doesn't go down in spring tension.KenHo wrote:You did good!!! I just "barely" understand what the booster does, and no idea how to make one. Your photos are the first I've seen inside. Thanks for posting.
Ken H>
The most important thing is to either do all critical concentric things in one operation or indicate everything back in every time. IE exterior of piston and threads of piston needs to be one op. Same with bore of the front portion, male threads to the can and female threads to hold the rear portion. Leave no room for misalignment and you'll be fine.