Search found 5401 matches

by Ragnarok
Mon Oct 29, 2018 3:21 pm
Forum: Off-Topic Hobbies
Topic: "Offtopic-posts-topic" NSFW
Replies: 6619
Views: 248203

Re: "Offtopic-posts-topic" NSFW

My first thought when I saw those going viral on imgur was "The internals on those would be a mess, half of those designs look like they couldn't be held at all, and only one of them looks even slightly comfortable - and even then I'm not sure how you'd aim it." My second thought was "Wait, WHO post...
by Ragnarok
Mon Apr 23, 2018 10:07 pm
Forum: General How-To & Discussion
Topic: GGDT/HGDT Request Thread
Replies: 108
Views: 16860

Re: GGDT/HGDT Request Thread

I'm going to hazard a guess that the diaphragm in a sprinkler valve doesn't weigh nearly a pound and a half... Personally, I don't think GGDT's optimiser is fantastically useful, except in fixed overall length mode (maybe). It's perhaps an interesting lesson in efficiency, but trying to eke every la...
by Ragnarok
Tue Mar 20, 2018 12:42 pm
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2412
Views: 140688

Re: "In the world of spuds today"

The best dart fletching design I've come up with so far is a three finned dart with angled leading edges. It's intended more for air cannons than blowguns, but it's possible it might be of some inspiration to you. I don't seem to have a picture of the current version, but this is an older prototype ...
by Ragnarok
Sun Feb 18, 2018 4:39 pm
Forum: Off-Topic Hobbies
Topic: Fracturing Veil
Replies: 3
Views: 1300

Re: Fracturing Veil

Some silliness from Valentine's Day: https://imgur.com/fA4MsLK.jpg The slightly less silly stream of thought that came with it: The development of powered exo-skeletons naturally meant the possibility of a whole new generation of infantry weapons. Athena was a natural candidate to field test many o...
by Ragnarok
Tue Feb 06, 2018 2:04 am
Forum: Pneumatic Cannons
Topic: Simulated recoil on heavy cannons
Replies: 18
Views: 1709

Re: Simulated recoil on heavy cannons

- that part could be mitigated by physical restrains that protected the gunner from sticking parts of the body in the way of the recoil on real constructions. And the rest lies in the training. And in the fact that the recoil won't be nearly as aggressive as in the real life. Far from that. I'm ver...
by Ragnarok
Mon Feb 05, 2018 5:17 pm
Forum: Pneumatic Cannons
Topic: Simulated recoil on heavy cannons
Replies: 18
Views: 1709

Re: Simulated recoil on heavy cannons

... right, I've gone back and looked through your posts. If this is for paintball, the performance of the design is probably not a major concern. I do have two concerns though: -If such a light projectile and low velocity is involved, the pressure and the time the system is under pressure simply may...
by Ragnarok
Mon Feb 05, 2018 4:17 pm
Forum: Pneumatic Cannons
Topic: Simulated recoil on heavy cannons
Replies: 18
Views: 1709

Re: Simulated recoil on heavy cannons

Just to make sure I got it correctly, Ragnarok: by tapping gas off the barrel you mean to put something like a T-piece in the hose that currently leads the air into the barrel and connect in to the cylinder? Not exactly, because that's not how I was expecting the launcher to be laid out. It would h...
by Ragnarok
Mon Feb 05, 2018 3:14 pm
Forum: Pneumatic Cannons
Topic: Simulated recoil on heavy cannons
Replies: 18
Views: 1709

Re: Simulated recoil on heavy cannons

From what I saw (and I admit this tech is new for me), cylinders didn't seem to have any perceivable acceleration time in the beginning. If they're trying to shove a 45kg launcher about, they are going to be slowed down quite a bit. Then the piston reaches the exhaust and the air rushes to the barr...
by Ragnarok
Sun Feb 04, 2018 5:07 pm
Forum: Pneumatic Cannons
Topic: Simulated recoil on heavy cannons
Replies: 18
Views: 1709

Re: Simulated recoil on heavy cannons

There's still a minimum standard for faking it.

Even the less conversant are likely to spot that something is off if the carriage suddenly lurches forwards under "heavy recoil".
by Ragnarok
Sun Feb 04, 2018 4:44 pm
Forum: Pneumatic Cannons
Topic: Simulated recoil on heavy cannons
Replies: 18
Views: 1709

Re: Simulated recoil on heavy cannons

Faking recoil with a pneumatic cylinder is one of those things that doesn't work all that well (particularly with such a heavy cannon). True recoil is a very sharp impulse, with all the acceleration happening over a distance of just a few millimetres and then everything after that being deceleration...
by Ragnarok
Sun Feb 04, 2018 3:13 am
Forum: Off-Topic Hobbies
Topic: Fracturing Veil
Replies: 3
Views: 1300

Re: Fracturing Veil

I haven't, no. (Although looking at reviews and extracts, it does look like it could be interesting). I have to say though that one of the things about my influences in this project is that often it's cases of things I don't want to do. For an example, the moment robots are introduced into most stor...
by Ragnarok
Sat Feb 03, 2018 4:08 am
Forum: Off-Topic Hobbies
Topic: Fracturing Veil
Replies: 3
Views: 1300

Fracturing Veil

A couple of weeks ago, I threatened to talk about this (seeing it is slightly related to the prototype military tech much beloved by the forum), so here we go. "Fracturing Veil" is a sci-fi/fantasy setting I'm working on, set in an alternate modern day where computing and robotics have made great le...
by Ragnarok
Thu Feb 01, 2018 8:07 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1477
Views: 89040

Re: Short question topic

jackssmirkingrevenge wrote:I could, however IIRC he's still limited to same 1,000 frames per second cameras that we've been using
I'm guessing it's a while since you last watched. This is what he uses now: http://www.krontech.ca/
by Ragnarok
Mon Jan 29, 2018 1:18 am
Forum: General How-To & Discussion
Topic: New to spud cannons and I have a question.
Replies: 8
Views: 732

Re: New to spud cannons and I have a question.

jrrdw wrote:If you don't feel safe you are not.
Indeed. With spudguns, airguns, firearms or any other such things, if you're not sure if it's safe, check, check again, then still treat it like it's dangerous.
by Ragnarok
Sun Jan 28, 2018 12:20 am
Forum: General How-To & Discussion
Topic: New to spud cannons and I have a question.
Replies: 8
Views: 732

Re: New to spud cannons and I have a question.

Unless you're actually having to seriously force a projectile down the barrel, the frictional forces are probably pretty small compared to the pressures involved. Obviously though, you do want any launcher to be safe even in a worst case scenario such as a blocked barrel - if the construction leaves...