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Old Oct 08, 2012, 08:52 AM
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FLASHED HobbkyKing F-20A ESCs with lastest 2012-09-30 SimonK with bootloader enabled



5x HobbyKing F-20A @ $15 each

"Standard ESCs are actually not designed for multirotor applications. They are programmed to increase and decrease the throttle command towards the motor in a gentle way. The reason for this is quite obvious. Imagine a motor accelerating and decelerating so abruptly in a helicopter or car... it would damage the gears and reductions in no time. In a multirotor application, we really want just the opposite. The goal is to change the motor speed, and thus the thrust, as fast as possible to achieve a perfectly stable platform.

While the current ESCs used in most multrotor applications work considerably well, there is a lot of room for improvement. Using the same ESC, but loading it with dedicated optimized software, will increase the handling and stability of your multirotor greatly.

We call this RapidESC: converting your regular lazy ESC into a high speed capable speed controller at no extra cost, ready for multirotor applications."
*

These are one of the best types of ESCs for the SimonK firmware. Read first post here

All N-Fet:
"The ESCs which use only N-channel FETs have the advantage of lower resistance, less losses and hence more efficiency."*

External Oscillator:
"An external oscillator may supply a more consistent timing signal and steadier motor speeds" "but the internal rc oscillator ones will drift quite a bit based on temperature."*

HobbyKing F-20A Tested and flashed with latest SimonK with bootloader enabled so you can flash them in the future thought the servo cable with the USB linker from HobbyKing. I cut a little flap out and use clear tape to cover the opening. You can barely tell.

Selling them for $15 each ESC plus shipping US shipping only.

If you're interested send me a PM so I get proper shipping with your address. I'll be doing USPS shipping. It's $6.

Any question feel free to ask.


References:
What is RapidEsc (Simonk firmware)
All N-Fet Design
External Oscillators
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Old Oct 08, 2012, 12:42 PM
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The Flashed 30A ESCs I bought last week from you are installed on my quad and working great.
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Old Oct 08, 2012, 01:13 PM
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Quote:
Originally Posted by hoverhigh View Post
The Flashed 30A ESCs I bought last week from you are installed on my quad and working great.
awesome! Flashed ESCs are the way to go!

These are some 20 amps i was gonna use for a hexa but i changed my mind, so i flashed them and here they are
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Old Oct 08, 2012, 07:48 PM
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747Pilot's Avatar
United States, PA, Warrington
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I need something like this but more like 30 amps. Have any?
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Old Oct 08, 2012, 08:23 PM
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nope
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Last edited by TheFernMan; Oct 09, 2012 at 10:55 AM.
Old Oct 09, 2012, 05:40 PM
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Lauderdale
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I'll take 3. Im in Lauderdale, where in Miami r u? Cud we just meet for a F2F?
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Old Oct 09, 2012, 05:41 PM
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make that 4, need a spare
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