Uploaded July 2026 | Updated September 2026, 3 weeks ago

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0:00 - The hardest question in FPV
2:28 - The primary design constraint: Payload Weight
3:48 - Disc Loading
6:07 - Why use disc loading?
7:10 - What is a "good" disc loading?
9:55 - Estimate AUW from payload weight
11:34 - Download the spreadsheet and PDF
13:29 - Calculate prop size
14:48 - Battery voltage
17:51 - Motor size
20:08 - Calculate maximum prop RPM
22:38 - Calculate motor kv from prop rpm
25:12 - What if motor size and kv don't line up?
26:19 - Motor kv vs. prop size
26:51 - What about prop pitch?
28:14 - Example: 10" motor selection
34:08 - Battery chemistry
38:51 - Estimate mAh from weight
40:49 - Let's do a real-world example