I may have found a New Motor!

[concept1]

Well I only had a chance to get one flight on my Neu 1907 1.5y But I think this may be a real winner! it's only a 966kv but on 8s A123 so far to date this is the Coolest running motor ever! blows away the scorpion 1000kv, which ran fairly hot and didn't have the power needed. the Neu after 1 hard flight it wasn't even warm, I couldn't beleive I could hardly tell it was run, and the packs were harldy luke warm, head speed was lower the I would like but with the first results I know I can easily bump up a tooth or 2 and still be very efficeint. OOh yea i got 5 minutes on it which is the best time I have gotten as well.

[skigolfmike]

Shouldn't the title be I May Have Found a Neu Motor.:thumbup:

[concept1]

yea but that really gives it away!

I just tried a 24t pinion and wow that really wakes it up big time,insane! but flights drop back to 4 minutes, I don't have a 23t but will pull the 22t from my HDX500 and see how it performs. This motor is Huge so I dought it would fit a stock Hurri, but since I am useing the rotorworkz frame with revco gearing it fits just fine. temps on the 24t were only 112 on the motor and 125 on the packs, so still pretty good, the pack temps are still a tad cooler then they were with the RCP motor and the Scorpion.

[skigolfmike]

I'm playing with the Scorpion HK3026-1400 motor. The motor looks good so far. I have a similar problem as you in that I need about 1 tooth less gear. I've got 2500 head speed at 80% throttle.

The Scorpion speed control is another issue. Apparently it doesn't play well with an separate receiver battery, even with the + (red) wire pulled. Could be lots of reasons since I am running an 8V system.

[concept1]

the 1400 scorpion is supposed to be one of the better ones, but for me I am running A123 cells so I needed something in the 900-1000 range, I was hopeing to get longer flight times with the 1000 scorp but it really lacked power and ran hot. I think this neu has some real pontential. 10s would be great but i hope to stick with 8s A123.

[skigolfmike]

It would be interesting to try a 10S setup with a 600kV motor. Get 2 2000mAh 20C 5S 25C packs in series. Might work really well.

[concept1]

yes I know that would work, but I want to find a great combo with A123 cells, so far this looks like the ticket!
i am pretty happy now with performance, and temps are very good, i will probably order a 23t pinion, but dropping the curve on the 24 does work, and it does fly nice, plus if I want a few minutes of insane flying, running idle 1 at 100% is insane! idle 2 at 85-90% is good

[skigolfmike]

Yeah - I have great power with the HK3026-1400. I'm getting 2500 rpm at 70% throttle, so it's a little over geared. Not stupid power, but close.

[yuktong]

how is your flight time with scorpion 1400kv?
beside, do you get Z30A for comparsion?

[skigolfmike]

With it geared 19/68 - 20/61, 2500 headspeed on a 100-85-70-85-100 TC and +-11* PC a 4:30 flight used 2150mAh v. 2400mAh with the H18 power sucking motor. FWIW, I using 500mm RCPII carbon blades.

I'll get some more data to be sure, but it look like I got at least another :30 of flight time. Maybe even more when I get an 18T pinion and bump up the throttle curve.

[ps61785]

skigolfmike,

did you bother to cut a flat on the shaft of the motor...or just really snug up the set screw on the shaft...im just nervous about spinning the gear on the shaft and would like to know what others have tried...

[skigolfmike]

Blue Locktite on the grub screw and the shaft. No flat.

[concept1]

I always do the same, blue loc-tite on the grub and on the shaft, never spun one yet. although sometimes I need to use some heat to get them off

[vicrc]

I don't know how you guys can run the scorpion because when I did it got really hot and I was only running wooden blades at 2100 rpm. Maybe that the 1400kv as mine was 1000kv? So I went back to my Z30 and geared it down.

[skigolfmike]

I'm not having problems with the motor getting hot. Yes it does get warm, but it's not hot. Since I feel like I have it over geared, that's a good thing.

BTW, I stripped a 68T RevCo main gear down to nothing tonight. Was about 1/4 of the way through a power loop and it went rip. Got it down with no problems. It was interesting though.

[ps61785]

and these are supposed to be strong...was there really that much load on it that it decided to let go...

[skigolfmike]

Was there a lot of load on the gear? Yes, I was pulling into what would have been a 300' power loop from hover, so I was hammering it.

Why did the gear strip? It might have been the gear mesh was a little off. I thought I had the backlash set pretty well. Looking at what was left of the gear, I may have set it too loose. You'd think I'd be better at it after setting the gear mesh on slot cars and RC cars forever.

Is the HK3026-1400 more powerful than the power sucking Gaui H18? They are pretty close in power. I actually think the power will be a little better on the Scorpion when I drop a tooth on the pinion.

Does doing forced autos suck? For sure! I was full positive pitch in a near vertical attitude so I darn near stalled the blades. I was just high enough that I managed to recover enough energy in the blades to make a semi-soft landing.

[concept1]

well that stinks, but I bet the mesh was a little loose, I have been very happy with the revco gears, but I know from past exerience that you don't want to get loc-tite on any plastic parts because it can weeken some of them I always try to clean my pinions before installing the motor since that loc-tite likes to get on the teeth! I don't think it will hurt the revco but better safe. I have been very dissapointed in the scorpion 1000kv motor, it did fly nice but doesn't have the power, the Neu is much better and even lower kv. so far this is deffinatly my favorite motor by far. the scorpion is now in my HX 500 with ok results, it seems warmer then I would like but not hot. I may pull it and go with my H/18 though.

[skigolfmike]

I'm glad you like the Neu motor and it's working for you.

I'm actually pretty happy with the -1400. It's got every bit as much power as the H18 and it is way more efficient. I bet it looks real good when I put an 18T pinion on it. That motor would work for 8S A123, but you'd have to put a 16T pinion on it.

I probably got the gear mesh a little loose. I had a tight spot when I set it up so I didn't get the mesh as tight as I probably should have. It went quick too. Turned the gear teeth in to white plastic powder.

[ke6d]

I have an H18 that I flew for a while on 13T and stock gearing . It has a lot of power but it runs too hot at 2000 rpm headspeed. I could do loop, roll, flip for 6:00 min before my FlighPower 3200 EVO 30 packs are emptied (80%). I flew it for 100 flights...

I replaced it with a Z20a 980Kv motor on 14T / 20T OWB and stock gearing 100 flights ago. The Z20a motor can swing the 500mm RCP blades at 1900 rpm and still allow me to loop, roll, and flip for 7:00 min. The motor runs so much cooler comparing to the H18 motor after a 7:00 min flight. Even though the Z20 has the headspeed, it seems to bog very easy but not too bad for loop and flips until I started to do tic-toc. Every time I reverse collective during tic-toc, I can hear my beloved Z20a motor screaming at me in protest :) The headspeed drops a lot every time motor bogged. As as result, keeping altitude during tic-toc was very challenging. Flight time was down to 6:30 - 6:00 min on the FlighPower 3200 EVO 30 packs.

Last weekend, I installed a Scorpion 1210 Kv motor in place of the Z20a. Using a 13T pinion, 20T OWB, and stock gearing, I figured that if I could keep the headspeed low enough so that my Hurricane would not explode during spool up, I could probably fly it (headspeed calc is around 2750). I have my son operate the Skytach to get an intial reading during spool up on the ground (TC: 87, 84, 83, 84, 87) to get an idea of what the headspeed the blades are spinning at. The meter showed 2280 rpm :) Took off, hovering around to get another reading, headspeed was now 2240-2250 rpm.

Once I was satisfied that the motor/ESC would not cut out, I pulled her up into tic-toc maneuver. Boy oh boy, this little Scorpion motor loves to tic-toc by the way the blades flapped during collective reversal. I spent several minutes tic-tocing without any experiencing motor bogging. It was actually fun to keep the Hurricane at one spot during tic toc :) :) :)

Landed at 5:00 minute mark, unplug the Eagle tree recorder to see what kind of amp/watts/volts were pulling for the 5:00 flight. Below are the numbers:

At 2250 rpm headspeed:

Hovering: 25A
Max Amp draws: 63A
Power: 1200 watts / max (motor was rated at 1350 W)
Motor temp after a hard 5 min flight: 128 Deg F
ESC: 135 Deg F
Battery: 130F
Current put back into battery packs: 2400 mA

After the initial flight, I set the Idle 2 TC to 90, 87, 85, 87, 90) and proceed with another hard flight. The headspeed now went up to 2350 during hovering :) Proceed with more tic-tocs, flips, rolls, loops for the next 4:30 min. When landed the motor/ESC/battery temp were pretty much the same as the 1st flight. Current put back to the packs were around 2500 mA.

I have since had 8 flights on this motor. The recorder shows very consistent performance. I lost about 1 - 1:30 min of flight time comparing to the Z20A motor, but my Hurricane is now behaving just like my buddy's T-Rex 500 at 2600 rpm headspeed :)

It is now actually pleasurable to throw the Hurricane around in the sky :)

If you are looking for performance, but did not want to mess around with the Z30 motor (cutting hole in canopy, stripping gears, etc...) you may want to give this little motor (literary) a try.

Dan, KE6D

[JaggedEdge]

wow excellent report and info dan. Really appreciate the thorough breakdown vs the usual.. "yeah its great.. try it" info.. :D