My original setup was going to be 3s2p 11.1v Kokam 1480 mah pack and CC35, but my new ESC has to be replaced do to one of the phases being out on the controller. This forced me to use a CC 25, and instead of running 2 Kokam 3s 740 packs in parallel for the above & below configuration.

Materials:
T-Rex XL CDE (CCPM)
MTM 450 TH (3000kv) w/13T pinion (60g)
4 x HS 56s
CC 25 esc
Stock 306mm woodies "315mm"
Single 63g Kokam 3s 740 (20C) pack W/ micro deans connector
GY 401
AUW: 589g w/ Kokam 740
Ammeter

In the past, I have been known to make the Hummer scream with ballistic power, however, this review will be preliminary based on the fact that to get full power out of my setup, I would like to run the CC 35 and atleast the Kokam 3s2p 1480mah w/ the 325mm woodies which are called "335mm" to really have a rocking setup capable of displaying nice 3D power on a 3s setup.

This test is not perfect due to some of the possible listed above, but I did the best I could with what I had for now. I ran the test at 100% throttle for max efficiency throughout the system:

Idle up: 100,100,100,100,100%

0____degree pitch: HS 2640 rpm : 12 amps
-10__degree pitch: HS 2200 rpm : 22.3 amps

I ran for about 20 secs at each pitch setting.

Temps:
Motor: 92F
Kokam pack : 104F
CC 25 esc : 102.9F
____________________________________

Normal mode 50% thr:
+7 degrees pitch : HS 1350 rpm : 6 -7 amps Hover

On a seperate run w/ TP 3s 1320 gen 2 pack @ 50%
3 mins of straight hovering

Temps:
Motor: 110F
ESC: 144F
TP 1320: (124F)

Videos of climbouts and hovering:
Maiden flight:
http://www.runryder.com/helicopter/...Trex_Maiden.zip

Isolated Climbout vids:

Kokam 3s 740 mah
http://www.runryder.com/helicopter/...0_Climbouts.zip

TP 3s 1320 gen 2 mah (10-12C)
http://www.runryder.com/helicopter/...1320_climbs.zip

Impression:

I like this motor especially with the lighter Kokam setup. I flew around ~ 4-5 min due the maiden flight w/ intermittent tweaking to adjust settings as well as switching between normal and Idle up on occasion. I did not try to deplete the pack, but I do remember the end voltage was 10.-- something when I plugged it in for recharge.

The motor seems to be very efficient with enough pep to get you out of trouble with the lighter setup. And for $60, I don't think I can find a comparable motor. My test does have some limitations not be able to run my cc35 with larger Kokam pack. As you can see the headspeed did drop 440 rpm when -10 degrees pitch was applied. It may be due to the Kokam reaching it limits ( 20C x 740 = 14.8 amps continuous & 30C bursts = 22.2amps). I know I asked alot from this little pack, but it does try to deliver when I asked it supply power for a +14 deg pitch climbout. The micro deans connectors are rated as 10amps per connector pin and there are 2 connector pins so, 20 amps could be its limit and possibly choking off the motor for the power climb demands. Overall, this motor proves to me in these Preliminary test that it is not too power hungry, but gets the job done with the light Kokam in-tow.

On the other hand, the TP 1320 (10-12C) was only able to achieve max HS on 2550 PRM vs. the Kokam 740's 2640 RPM HS, not to mention the the TP is carrying 30 more grams. I think the bird is very stable flies fine on either pack, but the 1320 appears to be more sluggish to fly anything other than sport with this particular motor setup.

I'm dying to see this motor's performance with a CC35 and large, more capable 20C pack. A 4s setup would be really interesting given the climbout performance it is able to do with the little 740 mah Kokam.

Since the ESC is most efficient at thr 85-100% throttle range. I would like to express one word of caution if you plan to fly this setup with the TP 1320 and cc25 esc at 50% throttle, be sure keep the heli moving so that some air can pass over the cc 25 ESC and keep it cool. My 144F temp on the esc after a 3 min hover was on one spot. This is another limitation on my test, and why a CC35 with larger chip surface would do better at dissipating heat whle running it at lower throttle settings.

I bought the MTM 450TH brushless motor from:

http://www.justgofly.com

As far as the battery packs, just about everybody carries them.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

Nice review Zoom.
Im wondering how the cc35 will work with that setup.
Hopefully it will run cooler than the cc25. (don't mean to open up a can of worms there lol....with the whole debate of cc25 vs. cc35).
Cool vids! That thing's a rocket.

Wow with those kokams in there that thing really has a quick cimbout! Can it only do short bursts like that or sustained cliombout power?

Thanks,

With having such an efficient motor I'm able to run this little Kokam pack. The pack supposedly does 30C for ~20-30 seconds. That puts it a 22.2 amps. I happen to run this very same pack in my Jet at 20.5 amps for much longer bursts. I'm lacking a camera person so what ever I did, I wanted to keep it in view of my tripod.

Previous test were done with the MTM 450DH, but it had such a high Kv and it added difficulty of finding a pinion smaller than 8T, that person's setup did not appear to be operating in the range of optimal efficiency 85-100%. The 450 TH seems to be much more efficient at this point. Like I say I would like to see it action w/ the cc35, and larger 20C w/ higher rated connector, and 325mm CF blades. I think it may even rival some of the 4s setups, but this yet to be determined.

So, to answer your question, I have not tried to really push this setup with the current components, for more sustained 30 second climbs.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

Nice setup.

Zoom, do you ever get around the Houston area? I'd be happy to help with some testing/video with you if you ever come this way. We are not too far apart.

That will be fine jlewis99. You are right up the street. Whenever I'm in Houston, I usually go to Tom Bass to fly. But I haven't had time since the renovations.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

Great! Let me know when and I'll meet you at Tom Bass.
I have the camcorder...

hmmm...this guy should design helicopters...he seems to have more information on them than the people at Align....

hmmm...this guy should design helicopters...he seems to have more information on them than the people at Align....

I'm just trying to get some of the right info out there my friend

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

sooooo...what's the bottom line here zoom ? are you just trying to show that the ph 25 is actually better or just as good as the 35 if setup right ?

Bottom line

1) The MTM 450 TH (3000kv) is a better motor choice over the 450DH (4000kv) for the T-Rex. Not bad at all for a $60 motor.

2) Kokam (20C) packs rock

3) CC 25 can get the job done if you don't want to through it away, or if you have fears. However, if you need more power or cooling, the CC 35 will be a better choice.

4) You can have a very nimble setup for 3D with only 3 cells.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

ZOOM thanks for posting your testing.
Gives good food for thought.
The ZIP files make for faster downloads.
The climbouts look good. But mate that heli is all over the shop! Tail wagging. Maybe forget about tuning the engine setup and concentrate on the heli setup.
I am still happy with my 400DH and will get another one if it gets damaged.

Thanks, but that was its maiden flight. i'm still tweaking the setup. I just wanted the tail to hold well enough for a quick climb out video.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

Awesome!!! On 3S that climbout is just amazing - that would kick the ass of my 5S setup for sure, wow.

EDIT: After a couple of PMs asking about this comment, I should make it clear that this was a joke.

Dankers :
Awesome!!! On 3S that climbout is just amazing - that would kick the ass of my 5S setup for sure, wow.

Are you sure?!!???!!!???

That is amaizing. I am impatient to receive my 450TH!

Great job Zoom! Love the commentary.

Now we need someone to compare the 400DH against the 450TH.

I wonder if TREXTUNING is doing a 450TH review?

....there goes that CA glue sticking to my fingers again!!!!

As far as I know, I was the only heli guy to purchase the 450TH. It was not sponsored by anyone other than myself. I just thought I would share some numbers with you guys based on what I found. Originally, the 450DH (4000kv) was anticipated as "THE" heli motor, but I do not favor higher KV motors. I like the lower ones for torque and efficiency such as the 450TH (3000kv).

Also, I have a 400DF (3000kv) and gathered some numbers on it, but I was waiting to shoot some video on it prior to posting those numbers. As far as the 400DH, I never bought one of those.

I'll post the 400DF results shortly.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

The follow are results to the 400DF (3000kv) in the T-Rex

I wanted to see how well the 400DF would do in my TRex w/ the same 13T pinion as on my 450TH, and since both of these motors have the same kv.

MOTOR: 400DF Brushless w/ 740mah 20C Kokam Battery

Heli Tests TREX

Idle UP mode:
Weight: AUW 579g
Pitch: -------------------0
Pinion: 13T
Amps :-----------------13.2
Head Speed: 2220rpm max

At_____ -10 deg pitch
19.2 max amp draw
1920 rpm Max HS

Normal mode 50% in a hover +7 deg pitch

The 400DF drew 6.3 amps @ 1440 rpm head speed
Video Coming:

Impression:

Despite the same kv, power source and pinion, the achieve a similar hover HS @ 50% thr (1350rpm (450TH) vs. 1440rpm (400DF) ), the 400DF could not reach the same maximum expected HS of the TH's ~2640 rpm. It only produced 2220rpm. However, what is interesting is that of the 2220 max HS @ 0 deg pitch, this motor's HS only dropped by 300rpm, vs. the 450TH's 440rpm. The only thing I can offer to explain this is the the Kokam was being choked off with the micro deans connectors once I asked for than the 20 max amps (2X10 amp connector pin rating) it supplies. I plan to retest with 40 amp ultra dean connectors as well as run the K 740s in parallel as a 3s2p 1480 setup as well as with my CC 35 which just arrived today.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

hmmm...... interesting... did you say you bought your motor from
http://www.justgofly.com ?

Yes.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F