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Zorns Lemma's Content
There have been 1000 items by Zorns Lemma (Search limited from 20-January 93)
We've been calling them blasters for probably longer than you've been alive. The emphasis on moving away from firearm nomenclature arises from the believe that nerf is a hobby/community/activity and not consumer armchair military fetishism (i.e. airsoft, which is heavily retail-consumption based).
[extremely 2009 voice] Due to low density variation in traditional projectiles, the center of mass is far from the nose and close to where the sum of fluid forces act, and so the projectile will tumble in flight along axes not parallel to the direction of travel. This is mitigated by spherical projectiles, but even these when rotating during travel will suffer from the Magnus effect. Thus, imparting spin to these projectiles improves stability by adding a large amount of angular momentum around the desired flight axis.
On the other hand, in foam projectiles, the center of mass is far forward from the center of pressure. Thus any tumbling motion though an axis not parallel to the direction of travel is resisted by a restoring force in the fluid field. In this case, attempting to give gyroscopic stability will have very little impact on flight stability. [/extremely 2009 voice]
I can't believe 10 years later this discussion is still going on.
(Regarding solving the muzzle blast issue for fishtail-inducing turbulence, I simply installed a longer barrel in my Caliburn, but I suppose kids buying kits and not in the modding hobby don't have various lengths of barrel material sitting around)
If the idea of doing it with desync'd motors is to avoid the power loss of a hopup, for the projectile to receive spin, you will need slipping past one of the other motors, which means you have to tune both your motors speeds and tune the friction difference between your two flywheels and not really avoid any power loss compared to just driving both motors at the same speed and imparting your spin later.
You should definitely focus experimentation with homemade hopup modifications and report the results. Alternatively you can probably find some 3rd-party modification that wasn't tested at all but is marketed to do m a g i c and waste money on it because applying critical thinking and experimentation is too much cognitive load.
Is there a reason the holes in the plastic bolt attachment for mounting the rails are printed so loose? In ESLTs any hole that goes into the plunger tube is tapped, even if all structural support comes from external tube or rails, because this mean the incoming screw will mostly seal.
Most of the holes still have to be drilled out, so I feel it's reasonable that even if the horizontal/ortho-planar aluminum rail mounting holes on the bolt piece aren't tapped, they should at least be printed to a smaller bore, and then either drill+tap it for 4-40 or drill a slightly larger hole and self tap the 4-40 rail attachment screw through there.
I epoxied together my bolt but still saw poor outdoor performance even with a [k26] until I filled the holes in that rail area in with MEK.
- Fun war, fun peeps
- Reloading magazines means we played less than one round per hour of Nerf, not counting the lunch break that went over
- Confusing objective placement that was unsuccessful in motivating more creative nerfing than standing near the spawn
- Unfortunately lacking in large avian apex predators and confirmed kill counts
Thank you. But finding another supermaxx 5000 won't be easy. So basically when I pump the tank up, if I take the pump rod out, pressure builds in the pump tube if I cover it with my hand, within 30 seconds. Within a few mins there's barely any air left in the tank. What is causing this. How can I fix? Information above doesn't solve the issue yet.
Your described issue is speculated in a prior that definitely gives you the information you need to solve your problem:
If its actually leaking back down the line then it sounds like a bad check valve in your pump. Swap the pump and see if you still have a problem. A pump swap should be very simple and leave you with a wide amount of options for substitutes.
Quick update: Ran through these at APOC. Despite about a week's worth of testing, I alternated between shooting lasers and shooting cheetos.
Based on anecdotal evidence when I was trying to fire them rapidly with pump action no only was my aim off more, but the darts also tended to fishtail. It may be because when I'm aiming I aim up and so there's better initial stabilization thanks to drag forces and gravity.
Also they need a slightly special wye to shoot well, will post that when I get a chance.
However if you're short on time and OK with B/B- dart performance, these can't be beat. Men-gun darts are 25% more expensive ($10 more per 1k), much harder to get to feed, and have to be cut down. Hopefully artifact releases his new version of darts so I can see if stubbier head profiles have better weight distrubtion and flight.
- hanging out with friends again (special thanks Phil and Ted)
- 29 confirmed hits in the 5 rounds I participated in, for a 29/7/92 K/D/A
- Ice Nine, JLego, Koree + Wonder Twins making this back-to-back coast-to-coast war festival mania
- Getting to actually nerf with Gears instead of sweet juice wizarding in cancer shacks
- Seeing Slug again since 2009 Deal
- 11fps freeze-frame gif material of Phil eating a Frosty
- sex toys not belonging to Dom
- the internet
Ryan and I will be bringing 3k darts, but they may or may not fly straight.
Midwest nerfers: does anyone know of a good foam source from any of the chains we have available (Lowe's, Ace, True Value, Homie D, etc)? I did a McMaster order, and found that the 20' lengths of FBR they stock are the Dennis brand...same stuff that Menard's currently carries, and is woefully undersized. I'm at crunch time for foam for .5" CPVC barrels. Any ideas?
I modded my ESLT to use rod seals, but my redirect piece was 3D printed so it was much easier to have the structure needed to support such a seal.
Moving up to a 5/16" sheath would allow using one of the much higher pressure rated seals, so maybe that will improve sealing even more (but seems like most of the power loss for mine isn't at that area now anyways)
I just received 1000 of these, white foam with red tips (which is one of the color options on the newest iteration of the TaoBao page). They come in packs of 50, which is pretty nifty for redistributing (I don't plan to do so with any of these I picked up), plus I got an extra bonus dart in the package
Though I could've ordered directly through TaoBao, it appears their international shipping gets aggregated on the 3rd week of every month, so to make sure I could get these darts in a reasonable time, I went through a TaoBao agent (BuyChina in this case).
Jun-16 Order placed and finalized / paid
Jun-20 Taobao agent receives the shipment from Artifact domestically (China)
Jun-21 Shipped from Shanghai on DHL
Jun-26 Arrives in USA via Germany
Jul-1 Arrived on my doorstep
Cost was $42 shipped for these, whereas it would've been around $36 directly with Taobao, so $6 overhead for going through an agent (well worth it if you can't navigate taobao either with Chinese literacy or general ecommerce UI knowledge + google translate).
I've already started doing some testing, although preliminary results seem to indicate shortcomings in the quality of my measuring equipment/methodology than in the darts
Some mass variance results:
I did this testing in two chunks separated by a break and it looks like something happened with the humidity in my place (opened some windows, it was raining). Unscientific analysis estimates mass to be between 1.12 and 1.13g (my scale apparently refuses to display 1.13) with 99.97% of darts falling between 1.1 and 1.15g
Would the foam seal degrade over time and how well does it seal under firing pressures?
I'd love to make a replacement for ball valves to reduce how bulky the setup is, but one nice thing is the ball valve + extended leverage arm setup I have has lasted ~5 years without requiring any maintenance.
I uploaded some photos from this year's war: https://www.facebook...=1&l=ff75efc839
Seeing everyone again was excellent, especially with more regional representation this year as well. Hopefully I'll get the chance to come out again next year!
The only things I would improve would be having better dart supply (hopefully mass produced artifact domes will solve this in the near future) so that downtime is minimized, everyone can have standardized barrels and use any darts, and that way we can play more rounds.
I've build multiple blasters using a compression spring and stub of a plunger head. You need to have some sort of endcap on the back of your plunger head to seat around the spring and also stabilize the plunger head in the plunger tube, and then a thicker plunger "rod" bit as well.
What's extra helpful is having a tube in your spring rest that can fit inside your spring but outside the plunger rod. Here's a picture from my FAL-3 writeup
The red section is a rainbow catch + spring rest. Since you're building a snap this would just be your endcap in the plunger tube. You can barely make out a white rod that comes out of the red section, that's a piece of tube that fits inside my spring but also outside the plunger rod. Since I have to catch on my plunger rod, the tube is quite thing -- you're catching on the plunger head itself so you can probably use something like 1/2" PVC and center it in your rear bushing with creative plumbing.
HI, I just had to add about both of these darts- black ACC and knock-off megas. I got them both off aliexpress last week.
the black ACC look neat, but my voltage modded stryfe pulled off the head of one out five darts shot. and ranges are inconsistent: sometimes crap, sometimes awesome. they don't seem to be glued well at all.
as for the knock-off megas. the foam isn't as stiff as Hasbro megas. the rubbery heads are a mediocre cast- almost too thin on some sides. I tested them with my spring enhanced cyclonshock and this is what I think: the dart don't seal the barrel as well as the brand darts. ranges are far worse than regular megas. don't waste your money on these. oh, and the don't whistle since they have no hole.
Do yo u have the link for the chunlin darts? They've been taken off of amazon.
I'll also be doing photography again for all of the patty-cake rounds because nerfing isn't fun if the objective of the game isn't just lasering dudes from 100'+ away.
You should expand your design goal 2) to be more specific:
2a) Doesn't look like a paintball gun / airsoft gun (necessary for public nerfing in the USA)
2b) Doesn't cost more than an ESLT / [insert mid-range airsoft blaster here] (low barrier to entry for nerfing)
2c) Runs at low pressure (additional safety measure to make the design idiot-proof)
2d) Requires hand pumping / intentionally gimped ROF (otherwise you should just go play airsoft)
At my peak I probably had ~5 primaries between +boids variations, Crossbow, Quadshot, and a Big Blast.
After peaking in war density in ~2010 I've probably tapered down in blasters, carrying a couple of FAL variations mostly as tech demonstration and variety. As I've had to pack lighter and fly to wars while also not having as much time to just tinker and maintain blasters my goal is to have a single blaster that packs into a standard carry-on bag and requires no maintenance (currently an ESLT).