RunRyder - Amp draw on Neumotor

rrTV-PHOTO

New HD TV

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 713 ONLINE 20 EVENTS SEARCH REGISTER START HERE

1 page

685 views

POST REPLY

Revolution Models	.	CarbonXtreme	.	Midland Helicopters
	.		.

e-Align T-REX 250-450-500-600 > Amp draw on Neumotor

derekandjennys
Senior Heliman
Location: Cedar Rapids, IA

Anyone know what the Neumoter/1320 4 cell combo is pulling? Debating which way to go with speed control. Has a good conversation with Castle again. They are working on some new things that should really help. But for now we thought either CC35 or CC10 with external BEC. I of course bought a new 25! They are under rated on the motor side. It is the BEC that is the problem. What they are working on, is a dual BEC version of the 10 and 25.

Also, if you don't have the latest dowload, 1.11. Get it.

And I can now confirm, that new lipo packs should be broke in. Cycle them about 15 times at 1C or less.

Derek

01-25-2005 Over year old.

derekandjennys
Senior Heliman
Location: Cedar Rapids, IA

No one has checked?

01-26-2005 Over year old.

dnam
Veteran
Location: Herndon, VA - USA

I just checked with my wattmeter but I use the Neu on 3S TP2100s with 11t pinion. I had the 315mm woodies on.

Full pitch:
Max amp draw was just under 18As.
Max power was 190Ws.

So on 4S as voltage is up amp draws will be even lower. Your P25 will handle the amps no problem. It's just the BEC that can't always handle 4 servos and a gyro.

01-26-2005 Over year old.

HOMEPAGE

derekandjennys
Senior Heliman
Location: Cedar Rapids, IA

Well my first run was done indoors and did not go so well. Besides the controls being very twitchy. It held solid but when given control, it was as if it was a poor setup with stiff links. I believe it may be the carbon flybar, which is stiff up and down but allows twisting flex.

Then at 500ma out of the pack the speed control cut off. There was not much left to auto with, but i got it down for a hard landing on the skids. I had it set to soft cut, but the speed control appears to have gotten so hot that the chips slid down and shorted it. This was the 25 with an external Medusa BEC. And on 4 cells capable of 13-15 amps with a 22 amp burst. I have not been able to check what it pulls on 4 since I don't have a controller.

Has anyone checked yet? I did have it on idle up and was running it pretty hard for the first run. But it's electric and it's not like you need a break in period like gas and glow.

Debating the Kontronic or trying the Castle again. Any opinions.

Also, running the 325 carbon blades.

Derek

02-20-2005 Over year old.

tman52804
Senior Heliman
Location: Davenport, IA

I've been running my Trex today for the first time with a Nuemotor, TP1320 4s, 9T, CC35 and medusa BEC and have had no problems with shutting down.

02-20-2005 Over year old.

dkshema
rrProfessor
Location: Cedar Rapids, IA

Gah -- sounds like your first flight was a mess.

Twitchy vs responsive. My first couple of flights were an eye-opener. This little machine is a lot quicker to respond than its nitro counterparts.

I replaced the original swashplate with the microheli one, right off the bat. I also have discovered that almost all of the slop in the control system comes from the loose fit of the aluminum and brass busings in the aileron control levers, the mixing levers on the washout base, and the mixing levers up on the flybar seesaw.

Having taken care of all of that, I find the Trex to be very stable, responsive, and predictable on control. I'm running 20% expo on the aileron and elevator controls.

I also found that the stock elevator control arm can momentarily hang up on the side frames when going from rear command to forward command. That was fixed with some 400 grit sandpaper and an x-acto knife.

I'm still using the stock control setup, and am in the middle of converting a second frame set for eCCPM control.

Of course, I'm still using the 400S 2800 motor, a CC35, 13T pinion. I can't imagine what's slurping so much current that the solder melts and parts slide around on the PWB -- My ESC is barely warm atfer a ten minute flight, the batteries are slightly warm and the motor is a bit on the toasty side. I'll probably spring for a heat sink as summer approaches. I'll also be shooting for a different motor as time goes on. The 400S works pretty well, but I know there are hotter setups.

Dave

02-20-2005 Over year old.

TheRickster
Senior Heliman
Location: Beaumont Texas

Don't konw about your control issues but can tell you what caused the ESC to do the nasty...If you are running version 1.11 firmware you have found your problem...There is a real issue with the 1.11 firmware and it will reward you with generally no WOT led, constant OVer temp cutoff, low pwer and finally a totally melted PH25 complete with chips falling out of it...

Check ou the Castle Creations section on RCGroups.com..Lots of talk about this problem....

Rick

02-21-2005 Over year old.

HOMEPAGE

Jafa
Elite Veteran
Location: Sydney, Australia

I disagree with this:

Quote
So on 4S as voltage is up amp draws will be even lower

This may be true if all things remained constant, but they don't.

The motor speed increases significantly due to the voltage increase from 11.1 to 14.8 volts - on a 3000kv motor this would be another 9400 rpm (approximately) - so the motor is doing more work and consumes more power...

Try using the various motor calculators, PCalc for example, it shows a 10 amp increase on a 4S setup (Nue motor). Now this this with a prop for a plane, as we are geared the effect should not be quite so dramatic, but it does show the overall effect of going 4S

Same thing happens in Fan Calc for a ducted fan, significant increase in current drain...

Lepton | TRex600Nitro | Sceadu | Freya | Avant | Predator Carbon Max

02-21-2005 Over year old.

zo6
Senior Heliman
Location: Ohio USA

derekandjennys,

I'm running that Neu w/4s. It is drawing 10-12 amps w/9T pinion. I too was having issues w/CC esc's. I made the switch to Jazz and all is good now.

zo6

02-21-2005 Over year old.

BrainDrain_dx
Senior Heliman
Location: Wichita KS

Quote
So on 4S as voltage is up amp draws will be even lower

this statement is correct, saying you regear.
example: for a given headspeed of 2400 for a 600 gram trex lets say it takes 100 watts to hover thats
2s = 13.5 amps
3s = 9 amps
4s = 6.7 amps
5s = 5.4 amps
for gearing that leads to the same motor efficeincy these numbers are correct. The only time you would use more amps is not regearing so your spinning the head at 2800+ rpms for the same esc input. Watts is watts.

dx4life

02-21-2005 Over year old.

HOMEPAGE

XLr8r
Senior Heliman
Location: Southern California

I have a Neu on 4S/9t, UBEC, CC 35, works excellent

XL

02-21-2005 Over year old.

Jafa
Elite Veteran
Location: Sydney, Australia

02-21-2005 Over year old.

derekandjennys
Senior Heliman
Location: Cedar Rapids, IA

Has anyone tried 8 tooth?

Tman- you really should not need the Medusa with the 35. It has a 3 amp BEC. The Medusa I am running is only 2 amp.

Hey Dave. Yea it sucked. We were up till 5:30 am finishing this and a MS Hornet 2 up for the indoor fly in. Keep in mind, this has a Microheli CCPM swash with Al's ccpm conversion and a pretty decent geometric setup. The links are all smooth and I replaced the loose ones, and even have all 3 swash links with ball links. I am almost positive it is my experimental carbon flybar. Which should have waited a little. It actually flew better after the headspeed came down a little.

I think putting the stock flybar on, replacing the HS55s with Futaba 3108s and setting the headspeed for a consistent run might do it. Oh, and the Kontronic controller! Another $200!
I could have got the JR VIBE or a second Fury. Literally.

Oh and Rickster. You are right on. I have the latest 1.11. It is working well on the planes. Do they have a later version yet?

Derek

02-21-2005 Over year old.

TheRickster
Senior Heliman
Location: Beaumont Texas

So far most everyone that was having issues, (that didn't ruin the controller) have switched back to the 1.021 or 1.10.. You can send it back to CC and they will shoot you a new one ASAP, they are aware of the issues with the 1.11 Firmware..After doing this the CC25 is working great on T-Rex/ Neumotor/4S with no problems...

Rick

02-21-2005 Over year old.

HOMEPAGE

GTMAXX
Senior Heliman
Location: Leetonia, Ohio

Castle Creation V1.11 problems

Is the V1.11 issue only with CC-35 and CC-25s??? Are the CC-10s being affected??? Could this have been the cause of some of the problems that I had with my small Fiegao direct drive tail motor running off the CC-10??? Thanks, as if this is an issue - the word needs to be out a bit more so that no one goes doinking in their bird because of it.

02-21-2005 Over year old.

tman52804
Senior Heliman
Location: Davenport, IA

Everyone I know is recommending a UBEC (external bec) when running the CC35 and 4S, that's why I bought the darn thing.

02-21-2005 Over year old.

derekandjennys
Senior Heliman
Location: Cedar Rapids, IA

Maybe you should. I am pretty sure it would never be an issue on 3, but maybe 4 cells needs it. I guess I am going to get the Kontronic and just know that it will work. Really like the Castle controllers on the planes with the USB setup. The low weight and the ease of setup plus the ability to load the latest software, or firmware?,but that also seems to be the problem on helis. The software is released before it is ready, or they are not trying them on helis.

Derek

02-21-2005 Over year old.

1 page

685 views

POST REPLY

HeliProz	.	ZoomsHobbies	.	HeliHobby
	.		.

e-Align T-REX 250-450-500-600 > Amp draw on Neumotor

PRINT TOPIC

Advertisers

Subscribe to This Topic