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Old Mar 06, 2012, 06:28 PM
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United States, TX, Grand Prairie
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Originally Posted by Viper One View Post
I have a Typhoon 700-68-1680kv and Suppo 190-200esc.
I plan on flying 2x3s 4000 40C batteries, but I have a few 4s packs as well. Just wondering if this set-up could handle 7s in a ERC Eurofighter. Or will the amp draw be to high with the CS90?
I also have a CC 120HV I am thinking of using instead of the Suppo.
The HETs noted KV is correct were as the HK 4082 isn't, thinking it's around 1750 or 1800.

1680 kv should be around 110 amps IIRC over 7.5lbs of thrust on a 6s pack that can hold good voltage.

I have vids upthread of the CS90 doing 9.7lbs peak with a 1280kv old RC Lander motor which would the thrust would be higher if the RC Lander motor were bigger.

Look at the motors size and ability to cool, if you think it can take the watts then that's good.

I've had no issues with the SUPPO esc with .10 cent spark resistor for over a year, the issues I have had with them I forget real quick cause they're inexpensive...
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Old Mar 06, 2012, 09:55 PM
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Bill Diedrich's Avatar
Ventress, Louisiana
Joined Oct 2007
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Please explain "Spark Resistor", I am a total greenhorn at electronics, what is it's purpose and how do you determne if you need one or not.

Bill D.
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Old Mar 06, 2012, 11:12 PM
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Originally Posted by Bill Diedrich View Post
Please explain "Spark Resistor", I am a total greenhorn at electronics, what is it's purpose and how do you determne if you need one or not.

Bill D.
http://www.rcgroups.com/forums/showt...ght=anti+spark
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Old Mar 07, 2012, 12:33 AM
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United States, CA, Chino Hills
Joined Jan 2011
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12s on a Neu 1415 2Y

Well I just want to say that I've spun this rotor in a TJ90 Shroud at it was at 99amps at WOT. So at 12s that is to much watts for the 1415 2y. I bought the rotor to try out just to see the numbers. I can say it was super quiet. But I was concerned about my Neu motor as with a wemo on 12s your only doing 70-80 amps max with good packs. It has great performance but was looking for the swooshish sound in my 90 size airframe. Well I will try some other motors that I don't use everyday on this rotor in another shroud and see how it goes. But I did test inside a airframe full ducting and exhaust and thats what I got on 1100 kv 12s. But again I will looking for another motor combo so that is similar in weight to the 1415 size motor so I don't have a 15XX size motor weighing me down and CG go all out of wack.

If anyone has some motors that they are using on 12s please post. I would just like to know what your possible solutions are to the motor and 12s.

Thanks,
jeff
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Old Mar 07, 2012, 01:34 AM
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Joined Sep 2010
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Jeff
dude your good to go, 99amps aint bad heck I'm pullin 111amps in TJ90 1412-2y on 10s no problem. you can always go to 11s if you have to bring down the amps. I'd run it
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Old Mar 07, 2012, 03:23 AM
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Greece, Attica, Athens
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Originally Posted by chochmah View Post
Thanks a lot! 4S and 5S numbers would be really great.
Otherwise I would have to bin that motor (or sell it on ebay) and get something that works...
I run the 4S and 5S tests.

HK 3674-1660kv motor, CS 90mm 12blade fan, DLUX 100A ESC

4S 4000 40C Battery fully charged.
Vm: 13.86
Ap: 89.44Ap
Wp: 1273.6Ap
Thrust: 1.8Kg , ~64oz

5S 4400 65-130C Battery (90% charge - cells at 4.1V each)
Vm:17.4
Ap:125.7
Wp: 2187.1
Thrust:2.5Kg ~5.5lbs

I wasn't game to try 6S

As you can see this motor is pretty useless for this fan.

On 4S the thrust produced is not much.

On 5S the amps are high although it settles down to below 120A quickly.
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Old Mar 07, 2012, 03:54 AM
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Germany, BW, Ibach
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Quote:
Originally Posted by anlucas View Post
I run the 4S and 5S tests.

HK 3674-1660kv motor, CS 90mm 12blade fan, DLUX 100A ESC
5S 4400 65-130C Battery (90% charge - cells at 4.1V each)
I wasn't game to try 6S
As you can see this motor is pretty useless for this fan.
On 4S the thrust produced is not much.
On 5S the amps are high although it settles down to below 120A quickly.
Thank you very, very much! Your work is greatly appreciated.

Those Numbers are really useful to me. 4S produces just enough thrust at below 100amps to permit at least a try if my model stays within the weight limits (2.3Kg) Won't be a Rocket but worth a try.
5S at this numbers is not an reasonable option, at least not for me.
6S or more would require me to get a far better ESC and probably better batteries as well and I would not need more than 3kg thrust anyway.

Looks like I'll give the 4S a try and then buy a more suitable motor.

Thanks again!
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Old Mar 07, 2012, 04:00 AM
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Greece, Attica, Athens
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Originally Posted by chochmah View Post
Thank you very, very much! Your work is greatly appreciated.

Those Numbers are really useful to me. 4S produces just enough thrust at below 100amps to permit at least a try if my model stays within the weight limits (2.3Kg) Won't be a Rocket but worth a try.
5S at this numbers is not an reasonable option, at least not for me.
6S or more would require me to get a far better ESC and probably better batteries as well and I would not need more than 3kg thrust anyway.

Looks like I'll give the 4S a try and then buy a more suitable motor.

Thanks again!
No problem.

If your 4S lipos are good and can hold voltage at above 14v then 2Kg would not be a problem. I just run the test with a charged lipo I had around which is for smaller models.
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Old Mar 07, 2012, 04:19 AM
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United States, TX, Grand Prairie
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Quote:
Originally Posted by anlucas View Post
I run the 4S and 5S tests.

HK 3674-1660kv motor, CS 90mm 12blade fan, DLUX 100A ESC

4S 4000 40C Battery fully charged.
Vm: 13.86
Ap: 89.44Ap
Wp: 1273.6Ap
Thrust: 1.8Kg , ~64oz

5S 4400 65-130C Battery (90% charge - cells at 4.1V each)
Vm:17.4
Ap:125.7
Wp: 2187.1
Thrust:2.5Kg ~5.5lbs

I wasn't game to try 6S

As you can see this motor is pretty useless for this fan.

On 4S the thrust produced is not much.

On 5S the amps are high although it settles down to below 120A quickly.
What were the 4s thrust numbers settled?

13.8 volts is below 3.5 volts per cell.
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Old Mar 07, 2012, 04:29 AM
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Quote:
Originally Posted by jefffassbinder View Post
Well I just want to say that I've spun this rotor in a TJ90 Shroud at it was at 99amps at WOT. So at 12s that is to much watts for the 1415 2y. I bought the rotor to try out just to see the numbers. I can say it was super quiet. But I was concerned about my Neu motor as with a wemo on 12s your only doing 70-80 amps max with good packs. It has great performance but was looking for the swooshish sound in my 90 size airframe. Well I will try some other motors that I don't use everyday on this rotor in another shroud and see how it goes. But I did test inside a airframe full ducting and exhaust and thats what I got on 1100 kv 12s. But again I will looking for another motor combo so that is similar in weight to the 1415 size motor so I don't have a 15XX size motor weighing me down and CG go all out of wack.

If anyone has some motors that they are using on 12s please post. I would just like to know what your possible solutions are to the motor and 12s.

Thanks,
jeff
You remember what the thrust numbers, shaft and can heat numbers were?

If you're giving out more watts there should be more thrust involved too.

If you're looking for same 12s\10lbs of thrust I did around 9.9 with a smallish TACON 810kv motor on 12s for a split second before seeing the motors cylinder discolor.

I think there have been 12s runs with 900kv but they're in the 100amp range also...looks like for 80amps the kv should be around 750 - 800ish kv.

Don't know any big can motors that spin at those RPMs
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Old Mar 07, 2012, 04:32 AM
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Greece, Attica, Athens
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Quote:
Originally Posted by erh7771 View Post
What were the 4s thrust numbers settled?

13.8 volts is below 3.5 volts per cell.
1750gr settled.

Yep, the volts dropped momentarily to 13.8 but settled to about 14 after that.

Later on, I will charge a nano-tech 4000 45-90c lipo to have another run.
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Old Mar 07, 2012, 04:34 AM
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Don't think I need to say this but since the 90mm doesn't come with an inlet lip, the above numbers are on the test stand without an inlet lip. Don't know how the numbers will change when this fan goes into an airframe.
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Old Mar 07, 2012, 04:38 AM
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United States, TX, Grand Prairie
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Originally Posted by anlucas View Post
Don't think I need to say this but since the 90mm doesn't come with an inlet lip, the above numbers are on the test stand without an inlet lip. Don't know how the numbers will change when this fan goes into an airframe.
You can make one out of pink foam, if you have the old CS 90 it's lip fits just fine
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Old Mar 07, 2012, 04:41 AM
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Originally Posted by erh7771 View Post
... if you have the old CS 90 it's lip fits just fine
Actually, I do.... thanks!
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Old Mar 08, 2012, 10:12 PM
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United States, VA, Salem
Joined Nov 2011
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Quote:
Originally Posted by anlucas View Post
I run the 4S and 5S tests.

HK 3674-1660kv motor, CS 90mm 12blade fan, DLUX 100A ESC

4S 4000 40C Battery fully charged.
Vm: 13.86
Ap: 89.44Ap
Wp: 1273.6Ap
Thrust: 1.8Kg , ~64oz

5S 4400 65-130C Battery (90% charge - cells at 4.1V each)
Vm:17.4
Ap:125.7
Wp: 2187.1
Thrust:2.5Kg ~5.5lbs

I wasn't game to try 6S

As you can see this motor is pretty useless for this fan.

On 4S the thrust produced is not much.

On 5S the amps are high although it settles down to below 120A quickly.
I ran this motor tonight with the 12 blade 90mm Changesun fan. I had it in a back half f-18 fuse for testing so I don't have the thrust numbers.

I used the 90-100amp Opto HK ESC and Gens Aces 6s 4000MAH 25c lipo.

It pulls right at 109 amps making 2320 watts. Pulled it hard for close to a minute and the motor was hot to touch but not burning hot.

I really like the sound of it. It is very quite. I would like to try the 7s to see what the amps would be.

Jeff
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