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Old Jan 27, 2012, 02:13 AM
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hommel's Avatar
Netherlands, Zwolle
Joined Jul 2005
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If you permanantly glue the inlet lip to the shroud, deformation is no problem anymore.
But I have to agree that the rotor is the best part of the fan, the rest is of so-so quality...
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Old Jan 27, 2012, 02:17 AM
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Netherlands, Zwolle
Joined Jul 2005
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Quote:
Originally Posted by jcdfrd View Post
hey nick were finally getting some traction with our 6s setup lol!!
arent we getting about 40k rpm at 2k watts and cool as a cucumber? as I recall
I tried to look up with what motor you were getting these numbers... Couldn't find that. Thrust would be somewhere around 2.5kg/5.5lb?
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Old Jan 27, 2012, 02:22 AM
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Netherlands, Zwolle
Joined Jul 2005
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Quote:
Originally Posted by ravikoth View Post
Thanks so much, will opt for the HEt shroud , is it a drop in fit?
regards
Ravi.
Not sure, haven't got one on hand... Maybe someone over here has tried that?
I'm currently using a Eflite deltaV shroud, very nice match and with a slotted motortube for cooling.
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Old Jan 27, 2012, 04:29 AM
Extreme CNC Alloy EDF
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Australia
Joined Mar 2006
11,355 Posts
Can everyone stop posting up numbers without the inlet lip attached, the amp draw is not accurate and all it does is confuse the readers. Tests need to be done with the inlet lip attached so you can see a more accurate amp draw.
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Old Jan 27, 2012, 05:23 AM
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United States, TX, Grand Prairie
Joined Nov 2005
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Quote:
Originally Posted by anlucas View Post
I am a bit at a loss with the situation with stock shroud...
I have the flimsier version, I think as long as you don't let it sit with a 200f motor it might be ok. I didn't do any cool downs etc cause I wanted to abuse the motor but it held up pretty good, I used a heat sink.

Also, I have a HET metal shroud and noticed from it that the rotor tip whine is louder than the stock CS. Might be because the blade gap got reduced, I have some other SAPAC shrouds I can use but figured this one is pretty good in 1700watts

On the 2300kv motor, could you do some test with it lipped and see if the motor etc stands up to some harsh treatment and extra watts. 1.83kg unlipped is 2.2kg lipped if you add 20% thrust and that's a conservative number.....that's some REAL nice thrust for 26usd b4 shipping.

You can run it up for a minute and just let it sit for 30 second and take temps. Temps should rise but if it has enough mass and cooling area the temps will start falling before the 30 seconds are up. This cooling effect gets doubled while the motor is running at low RPM cause of airflow from my testing in the past, sometimes it wont allow you to know if a motor can put up with hot days etc. If you smell a burnt oil smell that's the wire laminate starting to melt but even before that look for the windings to get dull looking vs a glossy copper.

Want to know if that 11usd motor can put up with the abuse. I know some have drilled holes in the cone area of some of the LX motors (HKs L series) and they've been able to put more watts through them and help them dissipate more heat.

Would like to know before HK doubles the price on them

They sound REALLY nice in these fans, I like 26usd 2.2kg setups even though it's 6s which I think is too heavy a pack for most 70mm planes.

I posted upthread a 2300kv outrunner that looks JUST like a MB1 but RPM different...might get one just for kicks and try it on 7s if the test with the L2855 2300kv motor is confirmed
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Old Jan 27, 2012, 05:29 AM
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United States, TX, Grand Prairie
Joined Nov 2005
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Quote:
Originally Posted by hommel View Post
Not sure, haven't got one on hand... Maybe someone over here has tried that?
I'm currently using a Eflite deltaV shroud, very nice match and with a slotted motortube for cooling.
It's a drop in fit if you're talking about the HET metal shroud, the blade gap goes down but the rotor tip noise goes up, no matter...that might be a good thing; this fan is REALLY quite. I can't hear it at all if someone else is making noise with a dinosaur burning power plant in their plane

Also, when the blade gap goes down the thrust and amp pull go up slightly so motor KVs might be off a little.
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Old Jan 27, 2012, 05:38 AM
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Greece, Attica, Athens
Joined May 2011
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Quote:
Originally Posted by erh7771 View Post
On the 2300kv motor, could you do some test with it lipped and see if the motor etc stands up to some harsh treatment and extra watts. 1.83kg unlipped is 2.2kg lipped if you add 20% thrust and that's a conservative number.....that's some REAL nice thrust for 26usd b4 shipping.

... If you smell a burnt oil smell that's the wire laminate starting to melt but even before that look for the windings to get dull looking vs a glossy copper.
Sure, I will do more tests and I will heed Mark's request to do them lipped...

A snow storm is moving in and I doubt I will do any flying in the next 10 days.

....oh and I think I know how burning windings smelll....

The problem is I always setup my planes during winter and somehow I keep burning motors in the summer...
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Old Jan 27, 2012, 06:54 AM
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Joined Oct 2011
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Quote:
Originally Posted by 901racer View Post
Motor test results on the Cyclone CP-480-2800 with the CS 70/10 I just completed.

SkyLipo 4s 40c:
3lb 3oz
14.26v
63.81a
948.7w

SkyLipo 5s 40c:
4lb 9oz
17.72v
90.45a
1721.9w

I am really impressed with this motor so far. Cool to the touch after several 30 sec. of wot. I am going to throw a larger ESC at it and run it on 6s.
All my numbers are with the inlet lip attached. I did a few runs without it and it was an easy 20% decrease in amp and thrust as indicated. The two CS shrouds I have are solid and really pretty decent.
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Old Jan 27, 2012, 07:32 AM
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Quote:
Originally Posted by erh7771 View Post
TACON 2600kv Test results 4 and 5s\stock shroud\heat sink\suppo 200amp esc

52oz pk - 50oz settled\60amps-50 settled\15volts\120f at the shaft from 1" 100f at 6"
75oz pk - 67oz settled\87amps-70 settled\18volts\183f pk them down to 150ish with heat sink on

K, on 5s I just tried to beat on the motor as much as possible figuring it cost 21usd free shipping from HP and worth it to take one for the team. I ran it up WOT for 30 seconds at a time 5 second cools and did this for around 2mins then I just let it sit there and soak so I can see if I smell wire laminate and didn't. Ran through the same test again but pack was telling me were to go so I let the motor sit and it wouldn't hold any heat so it looks like the windings are being pushed to the max at 5s around 90 amps. I was going to tap the timing for the extra ounces but I think I have the numbers I wanted.

After a minute The 5s pack was a fairly new turnigy 30c 3600mah so it kept voltage pretty decent

The other anecdotal test I do is to feel how hot the motor wires get during run. 100% of the time if the motor wires get to hot when I feel them that means the windings will give out during flight. This motors wires didn't get hot at all, pretty much stayed the same prolly cause heat sink.

I agree with the poster upthread, this fan is a game changer..especially if this and the L Series motors from HK work out.

Fan and motor from 26 - 35 USD and sounds really nice especially when balanced in a twin set up.
Great numbers - about the same thrust as the CP I tested with a lower amp draw. Do you have watt numbers from the tests? Is this the motor your using?

Thanks..
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Old Jan 27, 2012, 08:11 AM
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United States, TX, Grand Prairie
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Quote:
Originally Posted by 901racer View Post
Great numbers - about the same thrust as the CP I tested with a lower amp draw. Do you have watt numbers from the tests? Is this the motor your using?

Thanks..
It's this one

http://www.hobbypartz.com/96m32-car-2848-2618.html

The settled watts were lower than peak cause this motor has less kv than the CP motor

4s - 778 settled watts
5s - 1600 settled watts
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Old Jan 27, 2012, 08:25 AM
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United States, CA, Watsonville
Joined Apr 2009
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Quote:
Originally Posted by hommel View Post
I tried to look up with what motor you were getting these numbers... Couldn't find that. Thrust would be somewhere around 2.5kg/5.5lb?
E-flite V32 inrunner, 2150kv. It's the stock Habu 32 motor.
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Old Jan 27, 2012, 01:38 PM
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Glacier Girl's Avatar
USA, FL, Lakeland
Joined Jan 2010
2,299 Posts
anlucas, was comparing your tests on the 2100 and 2300 kv units, and noticed something off?

Copied here so you don't have to search for em.
6S 4500 25-50C
52.88Ap
1213.0Wp
21.95Vm

5S 4400 65-130C
39.87Ap
787Wp
19.13Vm

4S 4000 40-50C
28.64Ap
450.2Wm
15.57Vm

The 2100kv motor looks like a good option..... It was barely warm after 3 minutes of tests.





turnigy L2855-2300kv
I tested the 2300kv version of the L2855 motor on 4S, 5S and 6S. Looks good after finishing the 6S tests I measured it's temperature. It was cool to warm(36C) as soon as I finished but after stopping the temperature rose to 58C.

Looks interesting

4S
15.55Vm
31.18Ap
491.7Wp
0.9Kg Thrust

5S
17.86Vm
41.21Ap
749.2Wp
1.1Kg Thrust

6S
22.05Vm
59.62Ap
1369.4Wp
1.83Kg Thrust (No lip or tube)


In all but the 5S test, the 2300 motor produced more watts, in the 5S it produced less then the 2100?
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Old Jan 27, 2012, 02:54 PM
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Greece, Attica, Athens
Joined May 2011
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Good eye...

The reason is that the 5S for the 2100kv was run with one of the new nano-techs 4400 65c lipos while for the 2300kv I run it with a standard 5000mah 20C lipo.

Thus the Vm numbers 19.13 vs 17.86.

I am sure that if I use the same Lipo the numbers will be different.

In any case these tests are probably meaningless since they are without the lip. I will run the again with the lip and the same lipos for comparison purposes.
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Old Jan 27, 2012, 03:00 PM
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United States, PA, Doylestown
Joined Sep 2010
2,502 Posts
Thrust figures on the 2100 unit would be great, too!
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Old Jan 27, 2012, 05:34 PM
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Australia, QLD, Mooloolaba
Joined Aug 2007
316 Posts
Just to check my own thoughts on this....but why is everyone so keen to get tis fan using 6S and beyond.

What is the real advantage?

A 70mm airframe is really not all that big, so I would've thought the extra weight would be a negative (lipo, ESC etc etc)

So at 4S using Extreme's figures and evidence in video, it would seem to be best suited and probably lighter than the 6S options?
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