Change Sun 10 blade 70mm - Page 164 - RC Groups
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Mar 07, 2012, 11:39 PM
Registered User
therealhiphop's Avatar
Quote:
Originally Posted by erh7771
Beat up on the CP 480 motor with another full charge 6s pack.

The pack kept voltage more and I did 6s\ 88amps \23v \8lbs 8oz....

Ambient air in room was 78f and motor temps were around 140 during the run which is a little high but doable.

The kick was when I stopped the motor after 20-30 second runs, the outside of the can wouldn't get more than 200f and the motor shaft stay the same!

Couldn't get temps over 200f with no cool down run so that's really pushing it IMHO, took pack down to 80% this time

I would think it's good for burst for year round use cause temps will go up during summer. In Nor Texas it's around 158f outside during the heat of the day so I wouldn't chance running WOT the whole flight.

If you're heavy on the go stick with most high power EDF setups make sure not to cut the motor off and let the heat soak into your ESC and motor windings...run the motor at the lowest power you can get it to cool things down for a minute or two after landing.

Very nice power out of that motor
Which one, 2500Kv or 2800Kv?

I just ordered the 2800Kv since I plan on going 5S most of the time, and maybe 6S with limited WOT.
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Mar 08, 2012, 06:40 AM
EDF rules... :)
AirX's Avatar
Quote:
Originally Posted by erh7771
The pack kept voltage more and I did 6s\ 88amps \23v \8lbs 8oz....
8lbs 8oz thrust force from one fan?

Eric B.
Mar 08, 2012, 09:06 AM
Registered User
erh7771's Avatar
Quote:
Originally Posted by therealhiphop
Which one, 2500Kv or 2800Kv?

I just ordered the 2800Kv since I plan on going 5S most of the time, and maybe 6S with limited WOT.
2500kv

I think if I were running the 2500 during cooler days I could run it WOT I would no doubt do the 2800kv in burst on 6s...

Would love to see what the thrust is, I think the 2500kv has some heat room in it too but not for 7s maybe can tick up the timing a bit
Mar 08, 2012, 09:07 AM
Registered User
erh7771's Avatar
Quote:
Originally Posted by AirX
8lbs 8oz thrust force from one fan?

Eric B.
No, I just reread it...it's 5lbs 8oz...thx threalhiphop
Last edited by erh7771; Mar 08, 2012 at 09:21 AM.
Mar 08, 2012, 09:16 AM
Registered User
therealhiphop's Avatar
Quote:
Originally Posted by erh7771
2500kv

I think if I were running the 2500 during cooler days I could run it WOT I would no doubt do the 2800kv in burst on 6s...

Would love to see what the thrust is, I think the 2500kv has some heat room in it too but not for 7s maybe can tick up the timing a bit
Wow I had to read your post twice. 8lbs?!

I wonder if I didn't make a mistake by getting the 2800kv instead of 2500kv?

I want as much performance as possible out of the 5S lipos I have, but from what I read there is not a whole lot gained by going to 2800, while the 2500 does provide some head room for 6S...
Mar 08, 2012, 09:21 AM
Registered User
erh7771's Avatar
Quote:
Originally Posted by therealhiphop
Wow I had to read your post twice. 8lbs?!

I wonder if I didn't make a mistake by getting the 2800kv instead of 2500kv?

I want as much performance as possible out of the 5S lipos I have, but from what I read there is not a whole lot gained by going to 2800, while the 2500 does provide some head room for 6S...
lol..just reread the post it's 5lbs 8oz...I was getting 5lbs 4oz before

Yeah, 8lbs out of a 70mm would change things in EDF world a lil

Also, those 300 more KV might push the fan in the 6lbs settled range with good batts.

I would do a thrust test with a 15 second burst on 6s...that should be good enough for most 70mm planes
Mar 08, 2012, 09:28 AM
Registered User
therealhiphop's Avatar
Quote:
Originally Posted by erh7771
lol..just reread the post it's 5lbs 8oz...I was getting 5lbs 4oz before

Yeah, 8lbs out of a 70mm would change things in EDF world a lil

Also, those 300 more KV might push the fan in the 6lbs settled range with good batts.

I would do a thrust test with a 15 second burst on 6s...that should be good enough for most 70mm planes
Glad you cleared that up. LOL

Thanks e.
Mar 08, 2012, 10:56 AM
"LiPo-Blaster"
RugFlyer's Avatar
Quote:
Originally Posted by erh7771
My CP480-2500kv motor numbers

4s\ 15.2v\ 50a\ 48oz settled
5s\ 17.6v\ 60a\ 58oz settled
6s\ 22.2v\ 85a\ 84oz settled

195f peak outside of can after 20 second run then couldn't get the motor or the motor shaft above 200f. Shaft of outrunner is decent measuring point for heat of windings cause it's were most heat is going to be held after a run.

All other temps weren't worth mentioning..

Edit on 5s...

5s\ 18.3v\ 62a\ 61oz settled
erh7771...Nice numbers!
Did you use the CS-10 housing for these bench tests? I know some guys are using different EDF housings with the CS-10 fan.

I have this Motor(CP480-2500kv) & CS-10 ready to mount in my new unpainted HABU Airframe that's been hiding in my basement for a year now. Should have crazy speed & thrust on 6S!
Mar 08, 2012, 11:06 AM
Registered User
erh7771's Avatar
Quote:
Originally Posted by RugFlyer
erh7771...Nice numbers!
Did you use the CS-10 housing for these bench tests? I know some guys are using different EDF housings with the CS-10 fan...
Yeap, don't blame them if an in-runner is used but the CP motors have a long standoff and keeps the motor from melting the can holder when some watts are applied.

Quote:
....I have this Motor(CP480-2500kv) & CS-10 ready to mount in my new unpainted HABU Airframe that's been hiding in my basement for a year now. Should have crazy speed & thrust on 6S!
I wish HK would sell them but there's enough venders that get them out the door....for 60usd for the fan and motor it's not a bad combo for over 5lbs of thrust
Mar 08, 2012, 01:06 PM
EDF rules... :)
AirX's Avatar
Quote:
Originally Posted by erh7771
No, I just reread it...it's 5lbs 8oz...thx threalhiphop
Yup thanks for clearing that. I had to look twice myself, if we could get 8lbs it would take 3Kw to get it done but wouldn't it be fun...

Cheers,
Eric B.
Mar 08, 2012, 02:18 PM
Registered User
HardAbz's Avatar
Quote:
Originally Posted by Cap232ac
mine showed up today..anyone know what size screws are used to mount the L2855motor?
I used M3x6mm Phillips Head Cap Screws to mount my L2855-2300kv motor in the CS 70mm 10 Blade DF unit.
Mar 08, 2012, 02:21 PM
"LiPo-Blaster"
RugFlyer's Avatar
Quote:
Originally Posted by AirX
Yup thanks for clearing that. I had to look twice myself, if we could get 8lbs it would take 3Kw to get it done but wouldn't it be fun...
Cheers,
Eric B.
Probably doable with a lower KV Motor on 7 or 8S!
Mar 08, 2012, 02:53 PM
Registered User
therealhiphop's Avatar

Need Some Suggestions


I used blue loctite on the grub screws for the shaft adapter and my motor threw a magnet so I had to try and remove it. I had a heck of a time trying to get the grub (set) screws off. In fact, I ended up taking the motor apart instead to get it out of the fan housing.

I was able to use my little butane torch to heat and remove one of them, but the other side is still stuck, and what's worse is that it's completely stripped so the Allen wrenches don't grab.

Any suggestions before I try to drill it out, which I'm guessing won't work?

When I removed the one on the opposite side I was able to slide the adapter off the shaft, but it still fits pretty tightly without wobble. Should I just leave it there? Will one set screw be enough to hold the adapter on the shaft, since I cannot tighten the other?

Thanks.
Mar 08, 2012, 03:05 PM
Registered User
You can try an EaseOut, it's similar to a reverse drill bit but they're made for things like this. If that doesn't work try a reverse drill bit and maybe it will break loose before you drill through it. I would get it good and hot before you try and remove it again, this will help the loctite let go.
Mar 08, 2012, 07:25 PM
Kamikaze Ace
Glacier Girl's Avatar
Or take a sacrificial Allen wrench that is slightly larger then the original. Use a block sander to whisker off a little at a time of the flats, till you can tap the wrench in.

Once you have it sized, as stated apply heat and see what happens.

Since you got the adapter off, there is only the loctite holding the screw in, so it should come out fairly easy.


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