Gear ratio to ROF?

MagicIRL

So I'm looking to get a more in depth knowledge of my airsoft kit, and while looking across various websites I see that each set of 'upgrade' gears are rated with a ratio (Eg. 16:1)

I found this kind-of explanation but it really left me baffled so I was hoping someone with a little more experience could help me out.

Lets assume for the sake of this enterprise, that the items being used are a 1 Joule spring, 7.4v LiPo 40C battery, a G&P M120 motor and a set of hi-speed gears.

From what I gather myself, you need to know the RPM of the motor to officially gauge what the ROF will be depending on the gear ratio, and weather you choose Hi Torque or Hi Speed relies on what FPS your AEG will be shooting at.

The problem is that I can't find any concrete data on M120 RPM, nor do I even understand how to convert the stated RPM to give me the expected ROF using the chosen gear set.

So, assuming that wall of text wasn't too confusing, does anyone have any idea what I'm asking about?

THE MINDER

With regards to gear ratio 16.1(HIGH SPEED) means that the sector gear will do one full cycle to 16 TURNS of the motor pinion.Another example -Normal speed 18.1 means the motor pinion needs to turn 18 times for one full cycle of the sector gear and so on and so forth.One cycle=one shot.

Each motor has different RPM (revolutions per minute)-not sure what it is for the M120(High speed/Low torque) but a fair guess would be about 3800rpm-if running at its optimum speed that is what it will do,
To do this it needs proper voltage and amperage from the battery-a motor will only pull the required amperage from the battery and no more.Higher voltage will increase it more but higher amperage beyond that required wont.

Given the battery you mention the 'C' rating ie:40c refers to the 'discharge rate' and thus the amperage available on demand-40c being quite high.You dont mention mAh which is equally important and you cant work out the amperage available from your battery without it.If for instance it were 1500 mAh this would put your output at 60amps which is more than required.
You can do some math yourself with those figures but I'm guessing with everything else properly set up you are looking at maybe 24 bb's a sec. An 11.1v 1500mAh 40c would drive it well into the 30's but the box would most likely disintegrate:eek: because your box would not be setup or have strong enough components to handle that speed and subsequent stress

However 'everything else set up correctly' is a broad subject and I aint going there cause I'd be up all night:D:D

Dave.

MagicIRL

Thanks Dave!