Monday, August 03, 2015

Motors and Speed Controllers for the Alien X

Ebay has been my choice for brushless motors and electronic speed controllers (ESCs) as the vendors there are a little cheaper than the Chinese warehouse sites and you can find a few good deals from US warehouse sellers.

I chose 4 motors and 4 ESCs from a single vendor in California.  The motors are 2212 class (motor diameter and stator height - 22mm diameter and 12 mm height).

4 - 2212 class brushless motors from Ebay
The specs for the motors are as follows (copied directly from the auction):

  • High Torque
  • Enduring high-temp above 180℃
  • Excellent-efficiency stator design
  • High-quality construction with ball bearing and hardened steel shaft

  • KV: 920
  • RPM: 10212
  • Diameter: 28.0mm
  • Length (w/shaft): 38mm
  • Shaft Diameter: ะค3mm
  • Stator Dimension (mm)
  • Weight: 62g
  • Thrust : 670g
  • Max Power: 180w
  • Input Voltage: 7.4V - 11.1V
  • Propeller: GP10*4.5 / APC 9X6 SF / APC 10X4.7

  • 4 x MT2212 Motors (2CW+2CCW)
  • 100% Brand New
The ESCs came from the same vendor and are pretty generic looking.

They have the following specs:

  • Based on Simon K firmware, further optimized to the perfect drive performance.
  • Highest efficiency 100% N-FET design.
  • Highest accuracy with Crystal Oscillator (Temperature won't affect the PWM operating range like other cheap ESC's).
  • No low voltage cutoff, because any cutoff in a multirotor = crash.
  • No over temp cutoff, because any cutoff in a multirotor = crash.
  • Super high refresh rate, no buffering of the input signal, resulting in more than 490Hz response rate.
  • 16KHz motor frequency, giving fastest response of the motor, and quietest operation as well (no 8KHz squeal).
  • Super simple, foolproof operation! Nothing to program other than the throttle range.
  • Continuous Current: 30A
  • Burst current (10S): 40A
  • Li-xx Battery (cell): 2-3
  • Dimension (L*W*H): 35mm x 23mm x 8mm
  • Weight wires Included: 25g
  • BEC Output: 3A/5V
Package Includes

  • 4 x Simonk-30A ESC
  • 100% Brand New


Sunday, August 02, 2015

My Experiences with Multi Rotor Drones

I'm going to log my experiences with the quadcopters I own and provide some opinion along the way.  I have numerous quads and will eventually step through them from the most recent "toy" to the earliest one.  Not the normal progression but it will be more entertaining for me to document that way.

My current project is a 500mm wheelbase (distance between motor centers) quad copter is what is known in the marketplace as the Alien X.  I liked the look of the wide and narrow "V" arms rather than a traditional "X" (don't fret, I have that one too).  The project started with the frame kit purchased from Ebay.  The price was $13.78 shipped from the east coast of the US.  Great deal.  If you are interested just search Ebay for "Alien X frame" and you will get auctions.

Alien X in kit form
Assembled Alien X kit
Assembling the kit is trivial and came with all the right size screws and all need hardware.  I put the 2 white arms forward and the red ones aft.  Note there is no landing gear outside of the simple extensions below the motor pads.  I'll add something later for a landing skid / gear.

The internet says to use Loctite Blue to help insure the frame screws do not back out due to vibration.  I stopped at my local Harbor Freight and bought their version of Blue.  We'll see if that was a bad decision later.  So far, things are staying tight.  While at the Harbor Freight I also picked up some hook and loop tape (aka no name Velcro), a new helping hands for holding items while soldering and a variety of small cable ties and shrink tubing.  These supplies will be used later when the motors and electronic speed controllers (ESC's) are added to the frame.  Note, this frame does not have a power distribution board (PDB) integrated into the bottom plate.  I'll have to add wiring for that.  Frames with an integrated PDB make ESC wiring very easy and quick.


Tuesday, May 06, 2014

Automatic "Auto Awesome" Motion GIF

I was poking around my photo storage on Google+ and noticed it automatically built this motion gif from a group of night shot images made at the Fort Worth and Western (FWWR) shops during an organized night shoot.


Wednesday, April 30, 2014

UP Herzog train easing into Valley Jct, TX - 4.28.2014 - 18:43


Tuesday, April 29, 2014

Coal load approaching Varisco, TX - 4.28.2014 -19:02


Monday, April 28, 2014

BNSF southbound at Buckholts, TX - 4.28.2014 - 18:00


Thursday, April 24, 2014

Loaded San Antonio Coal passing Calvert, TX - 4.24.2014


Wednesday, April 23, 2014

BNSF Empty Coal Caldwell, TX - 4.20.2014 - 18:08


Tuesday, April 22, 2014

BNSF Empty Coal Caldwell, TX - 4.20.2014 - 17:56


Monday, April 21, 2014

BNSF Southbound Chriesman, TX - 4.20.2014 - 17:20


Sunday, April 20, 2014

BNSF Southbound Chriesman, TX 4.20.2014 - 17:03


Sunday, April 13, 2014

UP Westbound off the Cuero Sub (Dalsa Connection) at Flatonia, TX - 4.5....


Saturday, April 12, 2014

UP Westbound at Flatonia, TX - 4.5.2014


Friday, April 11, 2014

UP Eastbound in bluebonnets at Schulenburg, TX - 4.5.2014


Thursday, April 10, 2014

UP Westbound easing out of the siding at Waelder, TX - 4.5.2014


Wednesday, April 09, 2014

UP Westbound leaving Flatonia, TX - 4.5.2014


Tuesday, April 08, 2014

UP Westbound at the Flatonia, TX photo pavillion - 4.5.2014


Monday, April 07, 2014

UP Westbound at the east end of Engle, TX - 4.5.2014


Sunday, April 06, 2014

UP Westbound at the interlocking in Flatonia, TX - 4.5.2014


Saturday, April 05, 2014

UP Eastbound east of Engle, TX - 4.5.2014

This is the first train I encounter around Flatonia and it happened quick - right as I arrived in town. A short chase east took me past Engle and to this opening with a fair patch of Indian Paintbrush.