jrohland
07-13-2006, 01:29 PM
I had some strange problem occur where my Align 35 amp ESC and AON 3000 got fried. I don't know which happened first.
Anyway, I replaced the Align ESC with a Kontronics 40 amp and, today I ordered a NEU 1107-2Y.
I hope with this combination my electric drive problems are a thing of the past.
jrohland
Raven_darkcloud
07-13-2006, 02:47 PM
Id like to know how well the neu motor works, my 430l is still running great but I will be replacing my esc as it is having trubles arming due to overtemp (sitting in the car on a hotday I think) Its a otter 35 made by teleebee. I'm going to a cc or hypirion 35.
jrohland
07-16-2006, 10:12 PM
OK. Well. It has been difficult. First, since the NUE 1107-2Y is rated at 3400 Kv and, I plan to run 4 cell LiPos, I wanted to run a 9 tooth pinion. I suspected there would be problems with a motor of this power so, I got 4 new main gears to have on hand. It is a good thing I did to.
First I tried a 3 cell with the 9 tooth. Within seconds I destroyed my current main gear. New main gear, tighter gear mesh, 10 tooth pinion and 3 cell. This flies nice, plenty of power, nice response thanks to the high head speed. Try the 4 cell, good by main gear. What is going on here?
Turns out I had loose and bent screws holding the frame in critical places. I replaced the frame screws and replaced the motor mounting plate screws. This tightened up the motor to main gear mesh changes under load. In case you don't know, the motor mounting plate is bolted to the lower frame and the main mast bearing blocks are mounted to the upper frame. This means if your frame flexes--which it does under load--the pinion to main gear mesh can change under load.
Well, with the frame and motor mounting plate tightened up, I can run the 4 cell and not strip the main gear. Let's try this monster in the back yard. The head speed is insane. What is that buzzing sound? After about a minute of hovering, fast up down moves and pirouettes, I hear a loud snap and the tail is not responding. What now?
Broken tail shaft? What the heck? I have one spare left. Put it in and, hit the back yard. Nice, the buzzing sound is gone and it is flying great. Time to hit the field. Flying around the field on a 4 cell. Not ready to slam it around so, easy figure 8s and quick climbs. Damn cell phone. Land take a call and throttle up to fly some more...
...Now what? Push the throttle up and nothing happens. Check it over and quickly find the motor screws are gone and one hole of the motor mounting plate is ripped open. With the motor held in place only by the wires, there won't be anymore flights at this field now.
Back home, get out the spare motor mounting plate and install it. Oh crap, one of the NUE mounting holes is stripped out. I've got several options:
1) turn the motor 45' to use the other 2 mounting holes. That means wire routing changes. Next option.
2) Tap the 2.5mm screw hole out to 3mm. Maybe but, lets try another option.
3) Cut the head off a 2.5mm screw, get out the thick CA glue, slobber CA on the screw shaft and screw it into the stripped hole. Let's see if that will hold up.
Everything is put back together but, no time to fly today.
So, what do I think of the NUE so far? I am very disappointed that the top plate is all aluminum. A motor with this power may need some steel inserts for the mounting screw holes. If I could have taken it apart, I would have put screws in from the back and used steel bolts. Alas, I could not disassemble the motor.
On the plus side, the power is great and, it works fine with my Jazz 40 amp ESC. The battery, ESC and motor temps are well within safe ranges (it is 95' F here today). As long as I can keep it from ripping itself from the heli, it is a keeper.
jrohland