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Old Mar 01, 2012, 12:15 AM
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DerekB's Avatar
Cape Coral, FL
Joined Nov 2001
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Tacon 2858 2618kv

Wait a minute. Why am I forgetting about the Tacon 2858 2618kv inrunner with results posted by erh7771 here and one of the few in the spreadsheet with a "cool" rating. And handled 5S very well.

Tacon 2858-2618kv
4S 30c
Vm 15.00
Ap 60.0
Ws 778
Thrust 1.47 kg
g/w 1.89

5S 30c
Vm 18.0
Ap 87.0
Ws 1600
g/w 1.33
Thrust 2.13 kg

I searched this thread and there was relatively little discussion on it, despite great results and great price.

Was there something wrong with this one that I missed?
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Last edited by DerekB; Mar 01, 2012 at 08:45 AM. Reason: Corrected Wp to Ws
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Old Mar 01, 2012, 12:16 AM
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manuel v's Avatar
Mexico, BC, Mexicali
Joined Aug 2004
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A real 2300Kv motor put to 14.8 Volts around 27,000 to 28,500rpm.

one 3300 Kv motor to 11 Volts put around 29-30000 rpm.

One big and more efficient motor put little more rpm.
One Little and inefficient motor put little less.

remember %NLS.

Manuel V.
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Old Mar 01, 2012, 12:17 AM
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DerekB's Avatar
Cape Coral, FL
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Quote:
Originally Posted by 901racer View Post
Thanks !! I will add the color coding indicator to the spreadsheet.
Where is the spreadsheet being maintained? Sorry, I just find the original one.

By the way, Thanks for your work!
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Old Mar 01, 2012, 12:53 AM
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Vienna, Austria
Joined Apr 2007
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weighty issue

Quote:
Originally Posted by DerekB View Post
Wait a minute. Why am I forgetting about the Tacon 2858 2618kv inrunner with results posted by erh7771 ...
Was there something wrong with this one that I missed?
Maybe you literally "missed" something: with 216g or thereabouts it has twice the weight of some of the outrunners - surely something to consider.
Otherwise a good choice, nice efficiency and with the long can excellent cooling!
100g + however is A LOT...

I think the weight is an important factor, maybe the weights could be incorporated in the master sheet of this thread (as Manuel has proposed)
http://www.rcgroups.com/forums/showthread.php?t=1601868
so there is really only one updated sheet to turn to - I would appreciate that.

EDIT: It was difficult to find reliable data, I could see 175g, most of the Tacon 2858 motors were rated 216g. Here, on the most comprehensive data sheet it's 175g
http://www.hobbypartz.com/96m32-car-2848-2618.html
Surely makes the motor even more attractive!

cheers
Clemens
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Last edited by mopetista; Mar 01, 2012 at 01:04 AM.
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Old Mar 01, 2012, 12:56 AM
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manuel v's Avatar
Mexico, BC, Mexicali
Joined Aug 2004
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I'm wrong with tacon weight.
I see different model.
The weight is 175grames.
and still fine for 5slipo.

Fore 4s is long and long live

Manuel v.
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Old Mar 01, 2012, 01:09 AM
It should fly at least once
clive45's Avatar
Australia, NSW, Grenfell
Joined Mar 2006
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Isn't it designed for 3S max volts 12, 4S might stress it some.
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Old Mar 01, 2012, 02:09 AM
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DerekB's Avatar
Cape Coral, FL
Joined Nov 2001
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Quote:
Originally Posted by mopetista View Post
I think the weight is an important factor....175g...Surely makes the motor even more attractive!

cheers
Clemens
Quote:
Originally Posted by manuel v View Post
I'm wrong with tacon weight.
I see different model.
The weight is 175grames.
and still fine for 5slipo.

Fore 4s is long and long live

Manuel v.
Quote:
Originally Posted by clive45 View Post
Isn't it designed for 3S max volts 12, 4S might stress it some. I think erh7771 ran it out good on 4S and 5S. Apparently some motors are under-rated.
If it's heavier, that's probably why it handles the heat and amps better. There is always a tradeoff. Yes, weight is a good one to include. I think it's important to just let all the motors get into the database and let each person decide, depending on their airplane.

For my Windrider 737, guys have built it from 7.5 to 9.5 lbs AUW and seems to make little difference. I will be in the 8 lb range, so to gain 78 grams x 2 = 156 g (5.5 oz) over the L2855's is no big deal for me.

erh7771 - maybe you can input here since you tested it. What did the motor sound like and did it seem well balanced? Was is quiet over the full throttle range?

My MAIN criteria has evolved to 4S/5S with good sound and easy to deal with for balance, plus longevity. If the motor is well balanced, quiet, seems to have good bearings, and handles the 4S and 5S, then that takes care of a bunch of variables. For all stock Change Sun fan setups, then all that's left is balancing the fan on magnetic balancer (easy) and getting the spinner balanced (fiddling).
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Old Mar 01, 2012, 06:10 AM
RAVI KOTHARI
Bombay,India
Joined Nov 2005
257 Posts
For those wanting to use a 5mm Shaft adapter for a Eflite BL32 motor this is a perfect Fit.

http://www.hobbyking.com/hobbyking/s...1_7B_5mm_.html

Cheers
Ravi.
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Old Mar 01, 2012, 06:16 AM
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Quote:
Originally Posted by DerekB View Post
Where is the spreadsheet being maintained? Sorry, I just find the original one.

By the way, Thanks for your work!
It is being maintained here. I will add the color coding and weight today when I get a chance.
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Old Mar 01, 2012, 06:41 AM
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Quote:
Originally Posted by manuel v View Post
A real 2300Kv motor put to 14.8 Volts around 27,000 to 28,500rpm.

one 3300 Kv motor to 11 Volts put around 29-30000 rpm.

One big and more efficient motor put little more rpm.
One Little and inefficient motor put little less.

remember %NLS.

Manuel V.
Manuel - I tested the CP-480-3300 and the Turnigy XK2850-B-3000kv. I can tell you the CP ran cooler measured with infrared. I don't believe we are taking into account setups that have a stand off adaper and put the motor in the air stream vs. up in the shroud with this rating scale. I know there are other ways to affect cooling, but we are talking about a general rating to give guidance.

Thoughts on how to adjust for that appreciated?

I also believe the watts for the Tacon results were settled Ws: vs. Wp: Just fyi.
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Last edited by 901racer; Mar 01, 2012 at 07:21 AM.
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Old Mar 01, 2012, 09:23 AM
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DerekB's Avatar
Cape Coral, FL
Joined Nov 2001
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Quote:
Originally Posted by 901racer View Post
I also believe the watts for the Tacon results were settled Ws: vs. Wp: Just fyi.
Good catch! I corrected it.

I actually did not realize what those subscripts meant. I never read the manual . Is this correct? The meter cycles through 5 values displayed for 0.4 seconds each, thus a 2 second cycle: Vm (Volts minimum), Ap (Amps peak), Wp (Watts peak), (plus Ah and Wh, which we don't care about here). I'm confused where the settled 's' values come from. There is no As or Ws readout. Are we recording the 3 values and simply calling them 'setted'?

I guess you just write really fast as the values scroll by. Does it go like this??

The 'peak' values are noted immediately upon starting the test on a fresh battery:
(time = just a few seconds - fast as you can write!)
Vm = Volts minimum (minimum volts during the 'peak' of the battery!!)
Ap = Amps peak
Wp = Watts peak

The 'settled' values are noted some time later, like 30 seconds (??) or so, but we manually change the 'p' to 's' in our notes (the meter still shows the Ap and Wp notation), and we just leave the Vm as 'm', since that's minimum volts at that time:
(time = 30 seconds or so)
Vm = Volts minimum (minimum volts during the 'settled' battery)
As = Amps settled
Ws = Watts settled

Maybe we should use Vmp and Vms notation???

Do I have this correct? If not, let me know and I'll come back and edit.
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Old Mar 01, 2012, 09:27 AM
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United States, TX, Grand Prairie
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Quote:
Originally Posted by DerekB View Post
...erh7771 - maybe you can input here since you tested it. What did the motor sound like and did it seem well balanced? Was is quiet over the full throttle range?
It was easy to balanced cause it was using the 3.17 shaft and it was pretty quite WOT butt the reason I wouldn't run this thing at the 6s level for long (maybe burst ) is it isn't an outrunner and doesn't have cooling holes and I don't think it could shave heat like a CP or the MB1 look alike 2300kv motor could at 6s.

I'm partial to outrunners after the test of this 16usd L3026 outrunner from HK on the 90mm fan HERE

It was greasy because I think they put 4-5 oz of oil in the bearings but that is a good thing. Like these 28mm L series motors I hope that one works out cause it's perfect and light etc.

Quote:
...My MAIN criteria has evolved to 4S/5S with good sound and easy to deal with for balance, plus longevity. If the motor is well balanced, quiet, seems to have good bearings...
I think bearings is one thing with outrunners we'll have to take care of more than inrunners but that is a matter of 5mins and 2usd oil stick.
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Last edited by erh7771; Mar 01, 2012 at 09:34 AM.
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Old Mar 01, 2012, 09:33 AM
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United States, TX, Grand Prairie
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Quote:
Originally Posted by 901racer View Post
Manuel - I tested the CP-480-3300 and the Turnigy XK2850-B-3000kv. I can tell you the CP ran cooler measured with infrared. I don't believe we are taking into account setups that have a stand off adaper and put the motor in the air stream vs. up in the shroud with this rating scale. I know there are other ways to affect cooling, but we are talking about a general rating to give guidance....
I wish I could find a good standoff maker that didn't charge an arm and a leg because "cooling" is sooooooooo important to the life of an EDF fan. The one thing that L3026 motor has in it is an open ended bell and I could feel the heat coming off of it WOT. I think the CP motors have that advantage along with being fairly light with a longer bell length.

I remember in car audio when the manufactures starting cooling with oils and opened ended and bumped voice coil cylinders watts and performance went up.
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Old Mar 01, 2012, 10:09 AM
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Greece, Attica, Athens
Joined May 2011
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Quote:
Originally Posted by erh7771 View Post
The one thing that L3026 motor has in it is an open ended bell and I could feel the heat coming off of it WOT
erh, just curious. Did you remove the end-cap with the axial blades from the motor? On the smaller ones, the blades can be swaped to extract rather than push air in.
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Old Mar 01, 2012, 10:42 AM
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Joined Feb 2006
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anyone have any numbers on 3s?? 10blade cs fan with 3000kv motor on 3s?

I ran it in the house seems pretty good. Im thinking two of these detrum motors on 3s with the cs10 fan might be a nice powerful light set up
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