Pseudotectonic

The reason I didn't lap it all the way flat was it will probably take down too much and weaken the flange that holds it in place in the gearbox, and also my shims are really just half the size of the bushing, so it is just the inner half of the circle it is resting on, and because there are not much axial load all it needs to do is keep the gear aligned and nudge it when it is off, and having the peaks removed will help the shim does its job and remove most of the point loads from the poor finish against the shim to prevent shim deformation, and there will be grease anyway so yeah, a bit of grooves are good for grease retention I've also polished the gears with tiny amount of Peek (the metal polish) and a dremel buffing wheel on a drill, just to remove the factor sharp corners on the teeth generally

The nominal capacity is usually measured with 0.2 C down to a lowest acceptable voltage like 2.75 V, it is never rated to discharge to 0 V because below the 2.75 V (or whatever they decide to be the cut-off voltage) it is irrelevant for all intent and purposes In that graph for example, Samsung decides the end voltage to be 2.5 V and actually has two capacity rating for 0.2 C and 10 A (which is about 0.4 C), and they are rated on paper to be 2500 mAh and 2450 mAh respectively (and the actual measurements confirm roughly with these numbers) https://www.powerstream.com/p/INR18650-25R-datasheet.pdf But every manufacturer measures it differently, some measures with higher C, some has different cut-offs, but the paper capacity is always rated to the cut-off voltage and not to zero

in my opinion only the AK and MP5 can do CQB and woodland well, and between the two it is personal preference

a few days is nothing to worry about some chargers have discharge function

He is right, if you discharge below ~3.0 V per cell you are just going to kill your LiPo, and since you drop down to ~3.0 V sooner with a higher C, you get less usable mAh out of the battery. Extrapolating to 0 V is irrelevant, even if you can do that, which you can't, because if we are drawing our own lines, I could just extrapolate the higher C to drop to 0 sooner, which is probably more likely to be the case.

I noticed on the SHS/Rocket bushings the factory surface finish is really inconsistent. Some are very rough but some are relatively smooth. This difference can be literally highlighted with some lapping. What I am doing here is used a 7000 grit paper and then 3M 0.3 micron lapping film sitting on a piece of marbel for some basic lapping. I am not aiming for any super precision here but only aiming to knock down the high points on a reasonably flat surface. If I were to lap it all completely flat it will probably take away too much material. You can actually feel the difference by running your fingernail on it in circular motion. In the first picture is the bushings in various stages of lapping process. The second picture is when they are done I am trying to grade and pair them up, which I am going to use the rough ones for sector gear and smoothest ones for bevel. Just because bevel spins the most. It may not look much but judging by feel of fingernail, it is already massively improved over factory finish. In theory it should at least reduce a tiny little bit of friction and helps with the breaking-in.

That was just a generic LiPo discharge curve from https://www.dnkpower.com/lithium-polymer-battery-guide/ You will get less overall mAh regardless of temperature with bigger current, as well as a bigger voltage sag the entire way So in any case, bigger capacity battery is always bigger because it represents a smaller C at any given current and will have less voltage sag, which is really what can affect the feel of the motor

Ackchually that is true, for example:

Ah = Amp-hour (capacity), but more commonly in mAh (milliamp-hour) which is 0.001 Ah A = Amp (current)

new tappet plate - is it sliding without friction? sometimes new tappet plates don't slide well, might be too thick etc

sounds like it's the magazine have you tried opening up the magazine and clean it

Public liability insurance is the legal requirement for airsoft skirmishing and UKARA site registration so if the site appears on the UKARA website, they will have public liability insurance. As far as I know, employer's insurance can be displayed "electronically", which might be simply an email I reckon

Air weapon (a firearm) and airsoft (not a firearm) are totally separate class of objects under Firearms Act. Airsoft being its own category is not considered a firearm. Depending on the exact wording of your sentence, a firearms ban probably means you cannot touch air weapons, but you can still play airsoft because airsoft is not firearm. From your description it sounds like you were done for the air rifles, but not for airsoft. Your "bb guns" may be air weapons if your BB is the metal kind of BBs and not the 6mm plastic airsoft BBs.

Still trying to figure out what this magical transparent material is that can drop BBs straight down on impact https://www.youtube.com/watch?v=rokdTjypBg4&t=90s https://www.youtube.com/watch?v=ek9A6fgiKAE&t=37 My current guess is some sort of 3 mm PVC sheet but not entirely sure, perhaps the way it is held around the edge with velcro also has something to do with it

You can use Audacity to measure trigger response or ROF or even for general diagnostic by getting an idea of how it cycles. Basically you can set it to record whatever sound you computer is playing, and you just click record and go watch a video and stop recording once you get the sound you need. And then here is my method of interpretation and it works for comparison purposes:

@Leo Greer From my measurement that is about 39 ms trigger response The best I have seen in all of the internets is a 19 ms setup with a 28 TPA and m130 spring, unknown gear ratio (could be even 18:1) but that guy had somehow gotten a precocking that is literally the piston just sitting on the very last teeth before release, and the sound is just like a spring rifle because it really sounds instantaneous, sadly the vid was deleted and I could only dig out my reddit PMs for the numbers, but that was the theoretical peak of trigger response and I am so glad to have witnessed it, and it was better than every single youtube video or clips of people showing their trigger response, so that is the ceiling to aim for if there is one

yes

If the image doesn't load for any reason here is a direct link to imgur https://i.imgur.com/gFEvWkO.png On the subject of polishing, I wonder if anyone has gone so far as to polishing the gears and piston teeth with metal polish like autosol or something so it improves the meshing characteristics

This is not meant to be a definitive graph but just a snapshot of my current understanding for peer review/critique, if anyone wants to share data that can prove or disprove otherwise that'd be great, cheers

I heard some fields in the US have a 30 RPS limit, not sure how common this is

Luckily I think the VCRA is pretty robust and the airsoft industry self-regulates very well and so the law is not like to be changed very easily

Well the court doesn't just do anything they want, they follow the guideline, and an overpowered RIF would still be a Type 3 weapon despite the technical definitions under Firearms Act, so really going overpowered does not really mean much by itself, but the reason of it being overpowered would be (e.g. if you modified it because of intention to cause property damage vs if it is a technical fault of your chrono)

It depends entirely on the circumstances, see Charging Guidance in https://www.cps.gov.uk/legal-guidance/firearms There is an element of Public Interest Considerations, "if contravention is technical and there has been no risk to public safety" then prosecution may not be required https://www.sentencingcouncil.org.uk/sentencing-and-the-council/about-sentencing-guidelines/about-published-guidelines/firearms-offences/ Say you are somehow found carrying a >1.3J RIF in public place https://www.sentencingcouncil.org.uk/offences/crown-court/item/firearms-carrying-in-a-public-place/ Since it is still shy of imitation firearm and not belonging in any other category it would be a Type 3 weapon, Lower culpability if you are not really trying to use it, so Culpability category C, and Category 3 harm (no harm/minimal risk), so you would get a fine or discharge (court finds you guilty but does not give you a sentence because the offence is very minor). But that can only happen if somehow you are carrying it outside without good reason and somehow getting arrested and then prosecuted So again, it depends entirely of the circumstances, and if you are a sensible person you won't be able to get yourself into insensible circumstances very easily

Ackchually in the UK I don't think there is ambiguity between the 1.3J or 2.5J, because it is simply down to the capability of semi only vs 2 round bursts or more I was just wondering if the US doesn't have legal limits, what factors are going into how do they decide on their field limits Edit: if I misunderstood your post, I think in both cases whether 1.3J or 2.5J it becomes a "lethal barrelled weapon" And if the projectile is not an wholly plastic spherical missile with diameter less than 8mm, it also becomes a "lethal barrelled weapon" above 1J

In that story, to my eye at least, that particular gel blaster visible in the photos would be an RIF because it isn't a principally bright unrealistic colour. Which actually explains why the RIF definition exist in the first place, if it is realistic to a certain degree, it can cause a lay person to consider it as a real firearm thus prompting the police to act accordingly. And having an IF or RIF in public would be a Section 19 offence of Firearms Act i.e. it is an offence for a person to have with them in a public place without lawful authority or reasonable excuse [...] an imitation firearm. I think the critical factor here is that those water pistols do look like a glock, and that gel blaster a uzi, or could be mistaken as one by someone not familiar with what a uzi looks like (such as me).