I'm redoing my gearbox new to teching understand the principles. But can't find a basic guise to ROF and bits required. I keep find things that contradict each other. So I'm basicly asking what should be I looking at buying high torque motor, 11.1v lipo, mosfet. But what gearset / do I need a delay chip. What do delay chips do? Any help or links to guides would be great.
Use I used the search feature and unless you know what to look for its useless.
Luke
To increase rof you do not need to do too much but if you want to go faster then you will need to do more than just the odd tweak
decide on what you rof is atm and where aprox you wish to be
personally the range of 20 to 30 I feel is plenty for us UK lot, be careful if you start to go above 30
even above 25 if you have heavy piston and shooting under 300 at present - this is where Pre Engagement may arise
(piston not return fully under speed and gears engage too soon and bang !!!)
plastic piston will lose 1 or 2 teeth as plastic shreds easily - no biggy
full metal tooth piston - oooh that won't be good coz there ain't no weak point and you could smash up quite a bit in there
A stronger spring and lighter piston will return quicker and help to avoid PE
problem is m110 will put you over the normal UK limit of 350 so to bring fps down you reduce the stroke by Short Stroking
16 teeth gets reduced on piston & sector gear to 15 say and you arrive back at say 345ish
However - for first time tweakers aim for milder speedy rof of say 25 max.......
one of the best tutorials so far:
http://www.airsoftsociety.com/forums/f10/legacys-guide-building-high-speed-aeg-87504/
Now remember that USA can use higher fps so they can chuck in m110's even m120's as is but we can't unless we short stroke
or cut coils off spring - bit noobish as cutting coils properly needs a bit of care - easier to fit a new proper full spring for a fiver
Hence don't always asume that just coz they say use this n that your gun will still be ok to use on UK sites
Here is a good comparison of different motors: (soz it ain't in english but you get the idea of motors on test)
Not a massive difference but SHS & Big Dragon perform very well for motors under £30
The motors you seek if you buy one are neodym ones that are way better/stronger/faster than most stock/ferrite ones
rewire the box - coz stock wire on lame tamiya is holding you back - especially tamiya, so replace with deans
Angle Of Engagement must be done (rubber washers/spacers) - unless you want to rip off the big first tooth (pick up tooth off your piston)
check seals - o-ring on piston head and cylinder head is sealing perfectly or as good as possible, even ptfe tape on cylinder head
fit a nozzle with o-ring if you don't have one on there - about a fiver max.
rewire the box with thicker wire 16awg or the thickest you can fit in there - silver wire is good and not as thick as 16awh silicone wire
fit a mosfet - don't have to go nuts a £10 basic non Active Braking will be fine - you can change fet later for a bells n whistle burst programme one if you desire
check box shimming and re-grease fit new say m100 or m105 spring - box is done really
You don't have to buy a high speed gear set straight away - honest but depends how fast you wanna go
Now the box redone and wire/fet/deans fitted - you should see around 15% increase - still on old motor/gears/battery
Next option is you could use higher voltage or burst LiPo but you could stay on 7.4v and still get good results....
Then fit a neodym motor - then you really see your rof increase - your wiring is no longer gonna hold you back
you could expect to increase by up to 50% from old stock motor - yes I kid you not.......
eg: stock setup hits 12 rps, rewire deans fet etc... will go up 15%+ so you get close to 14 on stock 18:1 gears
then replace ferrite motor with say SHS neodym - 50% and you hit 21rps on a decent 7.4v on stock gears
20+ on 7.4v lipo is a big improvement - you want more use 11.1v lipo and the third cell is another 50% increase
or fir mental 12:1 gears and you got 50% over 18:1 stock gears
BUT - 30+ and you can get PE = BANG, so like I said be careful or you will need to do more work to avoid this on stock m100 springs
Motor, fet, rewire, seals/grease looking at about £50 to get 20+ on a 7.4v with scope for plenty more if you so wish
still an improvement over stock and not too fast to hit PE plus a thing to remember.......
The faster your gun fires then very likely it will wear/break quicker - so another reason to not go really mental too
you should not need a delay clip on sector if your mags are decent and feed well
you can hit 20 - up to near 24rps on stock gears & neodym motor on 7.4v
(so you "could/should hit" 30 to 36 on 11.1v but watch out)
ANYWAY - have a read up on that link and watch video perhaps
go easy on your first tweak and take your time will bring quite good results I reckon
