Belt CP V2 to EXI Conversion - What you need to know

Having just recently moved the power system from a Belt CP V2 to an EXI 450, I thought I'd share my experience. Namely, what additional parts I needed.


You will need to buy an 11 tooth pinion gear (for 2629 rpm approx according to http://dhrc.rchomepage.com/calc.htm), and you will need shorter motor screws.

I belive the shaft on the Belt V2 motor is 2.3mm. The stock motor shaft isn't long enough with the pinion that it comes with, so get a pinion that will effectively extend the shaft and get the pinion teeth where you need them.

The motor screws from the Belt V2 are too long for the EXI frame.

I also had to use my dremel tool and cut the servo horn for the Belt V2 elevator servo. I'll post pictures soon. Basically, wherever I put it, it got in the way of something, so I just trimmed off the one side so it looked like the other two.

Keep in mind that since the motor mounts from the bottom on the EXI, (as opposed to the Belt) you will need to reverse the direction of you motor. I did this by switching the red and black wires.

I also had a little trouble with placement for the ESC. I have it in the front laying on the bottom tray, but the wire that goes back to the receiver (which I put in with the plugs slightly overhanging the back of the heli frame for easy access) is BARELY long enough to keep the ESC from touching the motor. Just make sure to use some double stick tape and tightly zip tie it so it can't move. You DON't want your motor to rub a hole in the capacitor on the ESC mid flight, I promise :-D


BTW, I have to credit Meanbaby for most of my setup, he helped me route all the wires and figure out where to put the ESC, receiver, etc.


I'll try to post picture of my servo wire routing too. Meanbaby had an excellent way of running them through the center of the frame and securing them with zip ties and double stick tape!


Hope this is helpful...



Chris

4n6Days wrote:

You will need to buy an 11 tooth pinion gear (for 2629 rpm approx according to http://dhrc.rchomepage.com/calc.htm), and you will need shorter motor screws.

I belive the shaft on the Belt V2 motor is 3.17mm. Can anyone confirm that?
Here's an 3.17mm 11T pinion:




Chris

it was my pleasure helping you out

was it the same motor that i found a few pinions for you? the esky one?
if so it is 2.3mm, not 3.17

the 450 class motors use 3.17

i swear by the Rhino pinions, better meshing and quiter also
http://www.helidirect.com/rhino-gear-ultra-hardened-steel-pinion-11t-05m-23mm-p-7257.hdx
for the 2.3mm

and here is for 3.17
http://www.helidirect.com/rhino-gear-ultra-hardened-steel-pinions-05m-11t-trex-450-p-6694.hdx


--pete

Yea the motor shaft is 3.17 for the 450 class motors and I use and really love the rhino's too

but all ESky brushless motors do have a 2.3mm shaft, I've had a few 450 motors that had a 3mm shaft too

You know, I guess your right!!! Bout the ESky motors. But the "other" 450 class motors are 3.17mm

90% of them at least

I corrected my first post with the right shaft size for the esky motor.

I was really bummed when I started putting together my EXI and the pinion didn't reach. I thought I was going to have to buy a new motor, which I do need a little more power but for now, I want to fly - you understand.

Meanbaby had an extra 10T pinion that fit the shaft AND we were able to put it on high enough that it meshes nicely with the main gear.


Looking forward to the Fatdaddy Fly In!!! Maybe I'll be doing more than hovering by then...