Quad build - Phase 2

New motors are in and tests conducted to figure out the power-thrust ratios.

 I soldered on the ESCs to the distribution board. This is likely going to change to remove a few grams of weight from the excessive wire. I may also print something to hold the ESCs internally instead of zip-tie to the arms.

Quad mostly built and ready for tests. Here's the objective of the tests:

• Get the motor power draws at speeds
• Get the thrust capability at each motor draw point
• Determine flight time
• Determine possible flight speeds

Tools used:

• Standard computer PSU with 12V 15A rating
• 2 multimeters
• One to measure the voltage from the PSU at source
• Replace the scope meter with this if not available
• One to measure the current
• Scope meter
• Measure the voltage at the distribution board (this is very important)
• 2Kg scale

Procedure

1. Hook up power from PSU to distribution board, use a multimeter with a 10A capability inline to get current
2. Hook up Scope to distribution board
3. put leg on scale
4. Add a decent weight (1-2lb object) to on quad to keep stable and down while testing
5. Scale should be reading 0 at this point.
6. Hook up RX to motor over scale
7. Power on everything
1. Verify radio
2. Verify that TX 100% == ESC 100% (may need to calibrate ESC)
8. Start measuring
1. Throttle up one notch, note volt/amp and negative weight
2. Continue going up until 100%

Ok. Now that's done there's obvious room for improvement and changes. For example the PSUs thin wires wont be able to keep up with the draw (this is why I used 2 meters just for knowledge) 

Results:

Volt (At dist)	Amp	Motor Power	Thrust	G/W
11.6	0.5	3.48	60	17.24137931
11.3	0.96	8.588	128	14.90451793
11	1.85	18.15	228	12.56198347
10.6	3.33	33.178	358	10.79028272
10.2	5	48.96	480	9.803921569
9.5	7	64.6	578	8.947368421

My PSU and cable arrangement started to pucker out and this was the limit. Though on these results I'd have to say the motor/rotor combo should do very well!

Next to come: Putting everything together with the FC