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DIY nerf rocket launcher

Last post by RocketFoam5 « Wed Jul 29, 2026 8:32 pm
Replies: 2
by Xenophile » Sat Sep 02, 2023 4:09 pm » in Pneumatic Cannons

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Air cannon overview.jpg

I love target shooting, and continue to enjoy the hobby, and I also enjoying engineering and building new things. For my...

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Hello! I know this post is 3 years old, but if you are still on here, could you assist me in making or understanding plans for this build you just...

2 Replies

62073 Views

Last post by RocketFoam5
Wed Jul 29, 2026 8:32 pm
HGDT calculator

Last post by jumoo « Tue Jul 28, 2026 8:46 am
Replies: 2
by nitrogigi » Wed Apr 21, 2021 7:09 am » in Hybrid Cannons

First post

Hi guys!
does anybody still have a valid link to HGDT calculator? or could put it back online?
Many thanks in advance!
I'm currently building an...

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It's nice to see someone else who remembers Patatorforum. I used HGDT years ago as well, but most of the old download links seem to have disappeared....

2 Replies

8136 Views

Last post by jumoo
Tue Jul 28, 2026 8:46 am
Leveraging server-grade hardware for high-precision cannon simulations?

Last post by kimg « Mon Jul 20, 2026 8:08 am
Replies: 1
by boteh35959 » Mon Apr 20, 2026 9:01 am » in Off-Topic Hobbies

First post

Hey guys,
I’ve been a long-time fan of the technical depth on this board. Lately, I've been getting really into the weeds with valve efficiency and...

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I'm curious whether the parallel processing actually gives you significantly different results from the standard models, or if it just confirms what...

1 Replies

23288 Views

Last post by kimg
Mon Jul 20, 2026 8:08 am
Does Anyone Keep O-Rings in a Fridge for Long-Term Storage?

Last post by kimg « Mon Jul 20, 2026 8:06 am
Replies: 2
by danigomez » Sat Jul 04, 2026 3:38 am » in Off-Topic Hobbies

First post

I was reorganizing my workshop this week and realized I have several boxes of spare O-rings in different sizes. Most of them are nitrile, but I also...

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I'd be cautious about a mini fridge, mainly because of condensation when you take them out, which could cause corrosion on metal fittings or affect...

2 Replies

10593 Views

Last post by kimg
Mon Jul 20, 2026 8:06 am
Crosman Pell Master 700 .22 CO2 rifle balanced valve HPA conversion

Last post by kimg « Mon Jul 20, 2026 8:04 am
Replies: 10
by jackssmirkingrevenge » Sat Dec 14, 2024 11:43 pm » in BB, Airsoft, and Pellet Guns

First post

Yet another vintage pellet gun resto-mod :D The Pell Master 700 is a somewhat unique CO2 rifle that was first manufactured by Crosman in 1967 and...

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Yet another vintage pellet gun resto-mod :D The Pell Master 700 is a somewhat unique CO2 rifle that was first manufactured by Crosman in 1967 and...

10 Replies

274122 Views

Last post by kimg
Mon Jul 20, 2026 8:04 am

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