std aeg hits say 13rps on 7.4v
Mosfet on its own does f*ck all if using stock small tamiya and stock wiring
(it is when the deans & rewired with thicker wire you get a 15% increase - the fet does nothing but stops contacts arcing)
The fet in fact is an additional device that will take a few nano or milliseconds to trigger....
anyway deans fet & rewire will get that 13rps to say 15rps on stock motor on stock gears
add in a neodym motor and that can add on anything from 10% on a slow torquey Big Dragon M140 (don't bother buying imho)
to a whopping 50% over stock motor
I've done this quite a few times recently to have a rough idea of what to expect
recent DSG FireHawk went from say 22 stock to 27 nearly on fet deans rewire but was higher due to going from 18:1 gear to 16:1
(just under 10% gear ratio increase - actually 8% coz 16:1 is worst set out there @ 17.28:1 not expected 16.35 like 12:1 (12.65:1 actual ratio)
from 27 it went to 41 with a BD m160 motor on 7.4v
Anyway back to std aeg - now at say 15rps coz rewired etc....
add in a neo motor - pi$$ poor slow 10% to whippy 50% and you looking at about 17.5 to say 22.5 rps on 7.4v
that output will be a decent improvement and won't double cycle at all or completely safe to avoid PE
if using the stock ferrite motor it may not stop so quickly as a neodym motor with stronger magnets
and "might" cycle twice if run at higher 11.1v reaching 22.5rps on ferrite with 11.1v lipo but I doubt it unless spring is worn or under m90
test each upgraded box on 7.4v first and then expect to see around a 50% increase on that figure when using the beefier 11.1v
so with neo at 17.5 to 22.5 you could see 26 to 34rps on 11.1v neo motor setup on stock gears
again the aprox 30rps figure should be very carefully considered as PE risk really increases at that point on stock boxes with full stroke pistons
These are simply cautionary figures and warnings - as each box/build can be a bit different to my findings/examplesbut being
I have smashed a few boxes up by pushing them too much I feel I need to just mention the risks of going nutz
20rps once fetted deans etc... and decent neo motor like shs torque or BD M160
when you change gears depending on what you use will increase further but the really higher speed gears will make the motor work harder of course so it needs to be up to it and not a weaker speed motor or it will run warm on doing extra work
14:1 could be to me a nice easy balance to increase ratio speeds and push up rof say 25% aprox
without too many other PE or double cycle risks etc.....
Bear in mind the faster you gun fires the increase in wear will likely arise
and I firmly think a rof of 25 is nice figure or limit to hit without making more work when upgrading
eg: shortstroking and higher springs
There is a great additional thread full of wisdom but remember to not fully take it as 101% gospel
as we in uk have much lower limits than the yanks over the pond with their higher fps limits
so though they say this n that will be fine and use a m120 full stroke - that will put us well over limits @ 393.6fps
and m100/105 is what our std aeg springs are or we go up & shortstroke a tooth or two
(each tooth removed will reduce fps by aprox 6% of initial fps (or multiply 393.6 fps by 0.94)
eg: 394 x 0.94 = 370, 370 x 0.94 = 347.8 if removing 2 teeth of rear of piston & START of sector gear
anyway soz doing Open University maths bollox - the link.....
http://www.airsoftsociety.com/forums/f10/legacys-guide-building-high-speed-aeg-87504/
