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Oct 13, 2010, 01:03 PM
Registered User
i812's Avatar
Question

What are the differences between Walkera ESC's?


WK-WS-12-003 Main Motor ESC's

ESC Model No. (heli/RX)

WK-WST-10A-L (CB100/RX-2436 & 4#6S/RX-2433)

WK-WST-10A-L2 (CB100/RX-2406C* & 4B100/RX-2406B)

WK-WST-10A-L3 (V120D01/RX-2433V)

WK-WST-10A-LTB (4#3Q/RX-2425)
* NOTE: CB100/RX-2406C w/ L2 ESC is older than RX-2436 w/ L ESC

WK-WS-10-002 Tail Motor ESC's

ESC Model No. (heli/RX)

WK-WST-10A-LT (CB100/RX-2406C* & 4B100/RX-2406B)

WK-WST-10A-LTC (CB100/RX-2436 & 4#3Q/RX-2425)

* NOTE: CB100/RX-2436 w/ LTC ESC is newer and faster than RX-2406C w/ LT ESC
Last edited by i812; Oct 14, 2010 at 12:43 AM. Reason: Added vronny info
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Oct 13, 2010, 02:41 PM
Registered User
For tail ESCs, the LTC has a lower latency over the LT.
Oct 13, 2010, 03:19 PM
Registered User
i812's Avatar
Latency = delay

So: LTC has less delay than LT

Does this mean: given the same change in RX-RUD input to both ESC's, the LTC output changes faster than the LT

Does this also mean, assuming everything else is the same: Tail Rotor with LTC responds quicker to TX RUD stick commands?

So, if I needed to replace Tail ESC, except for price, is there any reason I would want the slower ESC (i.e. are there any other differences?)?
Oct 13, 2010, 03:36 PM
Registered User
I have older cb100 main ESC-Wk-WST-10A-L2, Tail ESC -Wk-WST-10A-LT Rx 2406C
Oct 14, 2010, 12:27 AM
Registered User
Quote:
Originally Posted by i812
Latency = delay

So: LTC has less delay than LT

Does this mean: given the same change in RX-RUD input to both ESC's, the LTC output changes faster than the LT
Correct. But at ESC speeds, I'm not sure if you'll notice any difference in real terms. The more important aspect is how quickly the ESC responds to gyro commands since these occur far faster than what any human can manage.

Quote:
Does this also mean, assuming everything else is the same: Tail Rotor with LTC responds quicker to TX RUD stick commands?
In practical terms, it means that all else being equal, the tail should generally hold better with the LTC ESC over the LT.

Quote:
So, if I needed to replace Tail ESC, except for price, is there any reason I would want the slower ESC (i.e. are there any other differences?)?
I found the LTC to be more reponsive, sensitive and precise after replacing the stock LT ESC on the CB100 and definitely feel that it's an improvement to the older ESC without any drawbacks.
Oct 14, 2010, 12:38 AM
Registered User
i812's Avatar
Thanks for the info.

It will probably come in handy if I can remember it.

By the way, how did y'all come across the Tail ESC info? Is it documented somewhere?

I would have thought electrical parts would have electrical specifications written down, but so far haven't been able to find anything written except for the part number.
Oct 14, 2010, 10:43 AM
I am the 53%
Bullitt3309's Avatar
It should also be noted that the LTB and LTC ESC main purpose is to operate on the higher signal generated by the 5 in 1 type of receivers Walkera recently released. They operate at a higher mHZ than regular receivers and can not use normal brushless ESC's. Nano Heli developed a converter to allow his flea to operate with those receivers.
Oct 14, 2010, 06:42 PM
Registered User
Quote:
Originally Posted by Bullitt3309
It should also be noted that the LTB and LTC ESC main purpose is to operate on the higher signal generated by the 5 in 1 type of receivers Walkera recently released. They operate at a higher mHZ than regular receivers and can not use normal brushless ESC's. Nano Heli developed a converter to allow his flea to operate with those receivers.
Hi Bullitt3309,

I've seen your post about 4#3Q brushless conversion. It's good for us that LTC can be used on 4#3Q as esc without modification. Thank you for sharing the info.


Do 4#3Q rx generate same 12khz pwm for both main and tail?

Both LT (for 4#3Bv3) and LTC (for v100d01) seem to be PWM esc. Have you tried LT on 4#3Q?


Thanks,
Oct 14, 2010, 11:37 PM
I am the 53%
Bullitt3309's Avatar
I first tried the LTB and LTC from a 4 3Q2 on my original 4#3Q. Worked fine. I could not source the LTB or LTC until the v100 used the LTC. I tried my LTC to my original Q and LAMA2, and it drove the main motors just fine. I still don't know the long term effects from driving the main with a tail ESC, but we don't have any readily avaliable options right now. I went ahead and bought 4 LTC ESC from club heli for my LAMA2 and 4#3Q. As far as I know, the original Q, LAMA2, LAMA2-1, Novus CX and Sea Cobra all output the higher signal to both main and tail channels. This is tied to the newer 5-in-1 style of ESC.
Nov 07, 2010, 04:15 AM
Registered User
Quote:
I went ahead and bought 4 LTC ESC from club heli for my LAMA2 and 4#3Q. As far as I know, the original Q, LAMA2, LAMA2-1, Novus CX and Sea Cobra all output the higher signal to both main and tail channels. This is tied to the newer 5-in-1 style of ESC.
Hello Bullitt3309,

I can't beleive what I'm reading here, are you saying that, the LTC ESC are the solution (cheap and WK genuine) to have a lama2-1 BL....by connecting the LTCs on the 2412A + motors (which ones?)
and Tadaaaaa lama2-1 BL !!! (and door open to WK BL birotors....)
Can you keep up posted, please ?

--
Newbheli
Last edited by Newbheli; Nov 08, 2010 at 06:17 AM.
Dec 14, 2010, 10:03 AM
Registered User
alexaglob's Avatar
It seems LTC works also with 5g6. I did a small test by soldering the needed male and female power connectors to get power from battery and feed RX2402. Also soldered the black wire of a spare 5g6 motor connector in place of the white wire of ESC (rx side). The RX2402 was able to drive two different brushless motors i tested, a Walkera main stock motor WK-WS-12-003 and one of these http://www.hobbyking.com/hobbyking/s...idProduct=9068
I'm now waiting two of these little ones http://www.hobbyking.com/hobbyking/s...idProduct=9824 to continue.
Mar 10, 2011, 03:45 AM
Registered User
Quote:
Originally Posted by alexaglob
... I did a small test by soldering the needed male and female power connectors to get power from battery and feed RX2402. Also soldered the black wire of a spare 5g6 motor connector in place of the white wire of ESC (rx side)...
Could you post some pictures please? I don't fully understand where is RX2402's output for the ESC steering signal.
Mar 10, 2011, 10:12 AM
Registered User
alexaglob's Avatar
Quote:
Originally Posted by Cezariusz79
Could you post some pictures please? I don't fully understand where is RX2402's output for the ESC steering signal.
You must connect the white ESC wire to the black wire of the brushed motor connector that goes to 2402, the red wire of the brushed motor connector is not used. You must power the ESCs using a Y-cable.

https://www.rcgroups.com/forums/show...postcount=9282


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