Sitting Duck

I'm sure these easy ways to work stuff out is pretty damn accurate & no calculator
or degree in mathematical engineering required

I have checked them and the gears ratio saves a major headache indeed
(unless you love counting up tiny teeth - 21 22 23 23 - no crap start again 1 2 3)
 
Count amount of turns on bevel gear to rotate the sector gear 1 full revolution & multiply by 3
checked this against stock, high speed & high torque gears - works out very well
and finally figured out wtf all them 100:200 & 100:300 gears bloody mean as well
 
Then just recently noticed how the port on cylinder kind of works out right without
all that Pi r ² crap working out volumes of cylinder & barrel and ratios etc....

So please have a look and if your own gun is running well see if the cylinder port bit makes sense
eg: length to port minus 12mm aprox = say 30mm....
multiply that final figure by ten - yeah I think you shouldn't need calculator for that one
= 300mm barrel for that port position

yes there a few variables eg: Tight Bore & Bore up kits but in general these will only throw out figures
on volume ratio by about 1% to 1.5% max on each variable....
 
I have checked this against a few cylinders that are for certain barrels and it works out very well indeed
(it is that simple to me I dunno why peeps bother with old π r ² x cylinder/barrel length)
plus some programs for calculating ratios are not easy to understand or don't seem to work out right to me
(bit where you enter or measure cylinder length or port is a little unclear to me)
plus people saying oh yeah a 3/4 cylinder is for 363 to 410 - wtf ?
3/4 is not exactly very pinpoint accurate and range of nearly 2 inches is also a little wide too ffs
I think it is nigh on there with the 12mm figure subtraction is about correct - but the cylinder should have AOE done
(Should really do AOE anyway is the general feeling)
This adds aprox 4-5mm to say 6mm on cylinder head inside the cylinder itself - never mind go with 12mm for now ffs
(O-ring sits aprox 2mm back from piston and is what creates the seal really so just go for 12mm - trust me)
anyway here are the pics that should be speak for themselves

give us any feedback if you can though chaps.....




&



cheers for any feedback even if I am talking out of my ar$e one more

Just thought if anybody was putting together a gearbox these could come in handy
to suss out what gear ratio you putting in there (in case you forgot or lost the packet they came in)
and also if you got a cylinder knocking about but unsure what barrel it is supposed to be used with etc....

Yes they ain't 101% accurate but imho these 2 quick tests are bloomin' close without all the maths
 
EDIT - make that figure aprox 15mm NOT 12mm - my very bad
12mm is piston but aprox 3mm further back from piston is center of O-ring which in effect is where the compression is created
or rather not created until it passes the end of port - therefore it is the O-ring's start & finish or travel is what we are trying to work out
 
So measure front of cylinder to port and subtract 15mm not 12mm - then multiply by 10 = ideal barrel range chaps
 
EDIT - 2018, after reviewing my crap I revised this to 15mm for 0.20's and say 20mm subtraction for say heavier 0.30's

top top mofo
always worth shooting him a pm on here or FB
 
down to earth bloke with down to earth prices - yet shipping is bloody quick without silly postage costs
 
already covered:
http://www.airsoft-forums.co.uk/index.php/topic/20130-wwwak2m4couk/#entry138973
 
but well respected on here
(if that don't get a super duper grovelling bonus loyalty discount then I don't know what will )

not quite a joke but I found it funny all the same
& the guy's response is sort peew peew related...
 
 

not quite a joke but I found it funny all the same
& the guy's response is sort peew peew related...
 
 

Shims UNDER the bevel are not too fussy either
it is the one place you don't have to shim to perfection
as the pinion once installed is never going to allow the bevel to move
Not saying don't bother shimming under bevel...
Just that you won't need to shim it to fine tolerance like other instances to hold in position
 
Take up some of slack under bevel - but don't fret over say fine 0.1mm tolerance say like other instances
Try not to use larger diameter shims under bevel, if you pack a considerable bit with larger diameter shims
it can impede/rub slightly with teeth on spur meshing to bevel I've found
So I tend to/try to use smaller diameter shims under bevel & on top of sector
(smaller diameter shims on top of sector is to reduce possible catching/snagging of tappet fin on sector shim)
 
Rough ball-park figure...
 
Bevel gear: 0.1mm to 0.2mm, maybe 0.25mm on TOP OF BEVEL
(take up some of slack underneath)
 
Spur gear: 0.1mm to 0.2mm UNDERNEATH SPUR
(whatever is required on top)
 
Sector gear - roughly 50/50 centered, check for rubbing against COL if too low
& sector cam rubbing on box if shimmed too high (or thick chunky delay clip installed)
(often a ball-park is whatever the spur has underneath - then add 0.1mm
or 0.2mm under spur, then 0.3mm (ish) under sector, then whatever req on top)
 
When spinning gears, also lay box on its side to listen for more friction/rubbing from gears or against box
(you'd be surprised how sweet it sounds upright, but a tin of wasps on its side, so investigate if you got OCD)
 
Once you got the gears "roughly spaced" or as you got the sector/spur "stacked up" nicely
Turn box over so the selector plate side is facing upwards....
lift sector gear up, checking for play - BUT look closely at spur axle...
If when checking the sector play, the spur's axle lifts too...
then they are stacked a little too close together and/or too much slack on those gears
(if left unchecked - it can produce those "swirl marks" on spur gear)
 
Another check & easier to see on a v3, once finished - have a look at how much of bevel's teeth
actually mesh with spur's teeth through motor entry point...
You want to aim for as much of the bevel/spur's teeth meshing as possible
BUT you will never get it meshing as closely as say the sector-spur - you can get these close without touching
but often the bevel-spur will not mesh anything quite as close...
 
If there is very little meshing at bevel-spur, then try to shim the spur and sector higher
by swapping some shims from top to underneath - keeping the gears together without becoming too tight
(as said say shim the spur (0.3 or something now and also the sector increase underneath & less on top)
 
Reason for this checking the bevel's teeth mesh with spur more...
Moment you get any strain/lockup, the light meshing contact between the bevel-spur
will result in those 10 teeth flying off as little may have made contact with spur
 
You can view this as a weak point - at bevel to spur shim/meshing if you wish
but it stands to reason, if little of the bevel's 10 teeth is making solid contact with spur's teeth
only the tips of 10 teeth mesh with spur - then under load,
the bevel's 10 teeth will tear themselves out at slightest sign of stress
 
BUT - as said, you just won't get enormous near full contact across the width of the teeth like spur/sector
Just check for hardly any contact width & adjust/lift up if possible, the spacing of spur/sector
 
Some bevel's have chunkier and wider 10 teeth cut to spur, meaning better contact than others
It is the instances where hardly any of the bevel's 10 teeth contact the spur
(here is where a bevel may encounter "tooth decay" at some point under stress)
 
Everybody's shimming technique varies & every box is different
(heck some gear sets are smooth as silk in one box & rough in another box)
 
But I check for sector lifting spur (selector plate side up)
how much actual contact bevel to spur, if poor, look to lifting/shifting spur/sector shimming if required
(as said it will never be extremely close, but look to ensure decent contact without throwing out stuff much)
Spinning the gears upright AND on on both sides to listen for rubbing/contact of gears/gearbox case etc... 
 
TL-DR
check for gears being too close together (sector/spur example)
check for decent contact between bevel/spur, or as much as feasible to reduce tooth decay
spin gears upright and on sides (both sides) for any excess rub/friction if you have OCD  like moi
 
or fuck it - just slap them in like the 5yr did at the factory sweat shop
(and just say Homer Simpson style - it was like that when I got here/bought it)
 
PS for the record - I know absolutely FUCK ALL tbh...
my latest was a v3, shimming was the bollox - really smooth
dropped motor, that was I thought meshing nicely at height/angle - even angle of cut of gears 90 degrees
 
FUCKING PILE OF SHIT - 10.2amps, low draw but sounded absolutely fucking awful
wobbled motor cage - still sounded SHIT - just doesn't make sense at all
Had to shelve it on Monday & hope to look into it this weekend, likely change motor
or investigate just WTF is up with it, never expected it to sound so crap
after all the attention to detail & sweet it all seemed to go
yet proof of pudding was a tin of angry wasps trapped inside a tin of rusty ol' nuts & bolts
 
So what the fuck do I know - ignore my advice, I know completely fuck all

not quite a joke but I found it funny all the same
& the guy's response is sort peew peew related...
 
 

not quite a joke but I found it funny all the same
& the guy's response is sort peew peew related...
 
 

not quite a joke but I found it funny all the same
& the guy's response is sort peew peew related...
 
 

What Helps You Decide on a Magazine?
 
 
Readers Wives ???
 
(edit my bad wrong forum)
 

What Helps You Decide on a Magazine?
 
 
Readers Wives ???
 
(edit my bad wrong forum)
 

What Helps You Decide on a Magazine?
 
 
Readers Wives ???
 
(edit my bad wrong forum)
 

What Helps You Decide on a Magazine?
 
 
Readers Wives ???
 
(edit my bad wrong forum)
 

Get your mind out the gutter!
 

If it's global - aka Hong Kong then the issue will be shipping & customs as per usual
 
found some more local biodegradable ones if you are interested in saving money...
 
https://www.realplasticfree.com/product/25274/organic-green-peas?PackID=24038
 
100% plastic free...
 

If it's global - aka Hong Kong then the issue will be shipping & customs as per usual
 
found some more local biodegradable ones if you are interested in saving money...
 
https://www.realplasticfree.com/product/25274/organic-green-peas?PackID=24038
 
100% plastic free...
 

If it's global - aka Hong Kong then the issue will be shipping & customs as per usual
 
found some more local biodegradable ones if you are interested in saving money...
 
https://www.realplasticfree.com/product/25274/organic-green-peas?PackID=24038
 
100% plastic free...
 

If it's global - aka Hong Kong then the issue will be shipping & customs as per usual
 
found some more local biodegradable ones if you are interested in saving money...
 
https://www.realplasticfree.com/product/25274/organic-green-peas?PackID=24038
 
100% plastic free...
 

Organic BBs. Now that is the next airsoft marketing fad.

If it's global - aka Hong Kong then the issue will be shipping & customs as per usual
 
found some more local biodegradable ones if you are interested in saving money...
 
https://www.realplasticfree.com/product/25274/organic-green-peas?PackID=24038
 
100% plastic free...
 

A JOKE but if this truly offends then mods please remove
 
A Jewish/Scottish/extremely careful with his money (delete as required)
man goes into the synagogue/church/place of worship (again delete what offends)
and prays. "O Lord, you know the mess I'm in, please let me win the lottery."
 
The next week, he's back again, and this time he's complaining...
O Lord, didn't you hear my prayer last week? I'll lose everything I hold dear unless I win the lottery."
 
The third week, he comes back to the synagogue/church/place of worship (again delete what offends),
and this time he's really desperate.
"O Lord, this is the third time I've prayed to you to let me win the lottery! I ask and I plead and still you don't help me!"
 
Suddenly a booming voice sounds from heaven...
 
"Benny, Benny, be reasonable. Meet me half way. Buy a lottery ticket!"
 
 
sorry if this offends but I think it is a little amusing
I've given options and if somebody is still offended
ah bollocks, lighten up

A JOKE but if this truly offends then mods please remove
 
A Jewish/Scottish/extremely careful with his money (delete as required)
man goes into the synagogue/church/place of worship (again delete what offends)
and prays. "O Lord, you know the mess I'm in, please let me win the lottery."
 
The next week, he's back again, and this time he's complaining...
O Lord, didn't you hear my prayer last week? I'll lose everything I hold dear unless I win the lottery."
 
The third week, he comes back to the synagogue/church/place of worship (again delete what offends),
and this time he's really desperate.
"O Lord, this is the third time I've prayed to you to let me win the lottery! I ask and I plead and still you don't help me!"
 
Suddenly a booming voice sounds from heaven...
 
"Benny, Benny, be reasonable. Meet me half way. Buy a lottery ticket!"
 
 
sorry if this offends but I think it is a little amusing
I've given options and if somebody is still offended
ah bollocks, lighten up

A JOKE but if this truly offends then mods please remove
 
A Jewish/Scottish/extremely careful with his money (delete as required)
man goes into the synagogue/church/place of worship (again delete what offends)
and prays. "O Lord, you know the mess I'm in, please let me win the lottery."
 
The next week, he's back again, and this time he's complaining...
O Lord, didn't you hear my prayer last week? I'll lose everything I hold dear unless I win the lottery."
 
The third week, he comes back to the synagogue/church/place of worship (again delete what offends),
and this time he's really desperate.
"O Lord, this is the third time I've prayed to you to let me win the lottery! I ask and I plead and still you don't help me!"
 
Suddenly a booming voice sounds from heaven...
 
"Benny, Benny, be reasonable. Meet me half way. Buy a lottery ticket!"
 
 
sorry if this offends but I think it is a little amusing
I've given options and if somebody is still offended
ah bollocks, lighten up

A JOKE but if this truly offends then mods please remove
 
A Jewish/Scottish/extremely careful with his money (delete as required)
man goes into the synagogue/church/place of worship (again delete what offends)
and prays. "O Lord, you know the mess I'm in, please let me win the lottery."
 
The next week, he's back again, and this time he's complaining...
O Lord, didn't you hear my prayer last week? I'll lose everything I hold dear unless I win the lottery."
 
The third week, he comes back to the synagogue/church/place of worship (again delete what offends),
and this time he's really desperate.
"O Lord, this is the third time I've prayed to you to let me win the lottery! I ask and I plead and still you don't help me!"
 
Suddenly a booming voice sounds from heaven...
 
"Benny, Benny, be reasonable. Meet me half way. Buy a lottery ticket!"
 
 
sorry if this offends but I think it is a little amusing
I've given options and if somebody is still offended
ah bollocks, lighten up

I am offended actually.You could have put this in my 'tell us a gag' thread lol.
Like it though 🤭
Regards