Q on Min air Ion gearing

[OICU812]

Ok so I want to understand if the gearing I have on this Ion will be a solid 3D setup.

The motor is a NEU 1921-1.5Yf, now I counted the teeth of the main top gear and the bottom gear as well. I plan on running either 2 5S1P 3700s or the 4350s as Will has shown in another post. I plan on running the 700 G2s that the previous owner gave me with the buy and later on some 690 light V blades. Now here is the gearing on it currently.

Top Main gear= 90 tooth
Bottom "Secondary gear" = 50 tooth
the two pinions from motor to bottom gear is 15 tooth as well the top one driving the main gear is as well a 15 tooth pinion.

Will this be decent enough to drive this bird around with solid 3D performance or should I look at a change up at all?

Appreciate any comments, thx. :lol:

[ChrisS]

That makes 20:1, a good ratio for that motor. We can change it a bit and double up the gear as well as make the plate thicker, if you like. But try it first and see if you don't like it.

One thing I would recommend is to put a few drops of green locktite or even a few spots of epoxy around the lower edge of the motor where the end bell joins the can...a couple have been known to come apart. Neu will fix them of course, but might as well do anything you can to prevent the problem from happening in the first place.

Chris

[OICU812]

Ok thanks Chris, I will let you guys know! I did the retainer thing on the bottom of the motor as well, thanks for that tip indeed. :)

BTW, might be a silly Q but I'd love to know the formula or trick you guys use in figuring out the ratio gearing on these MA machines..... :roll: :?:

[MinAirChris]

Upper ratio is 6:1. To figure lower ratio, divide the number of teeth on the layshaft gear (the medium sized white one) by 15 (this is the number of teeth on the motor pinion. Then take that number and multiply it by the 6:1 ratio in the upper stage.

So for you it was: Upper ratio 90/15=6; lower ratio 50/15=3.33; overall ratio= 6X3.33=20:1.

now lets talk planetaries...

Chris