Size everything from the wingspan, then make the parts agree: the prop sets how much current the motor pulls, the ESC must be rated above that draw with margin, and the battery needs enough cells and C-rating to deliver it. For a 24–36″ foam plane that's a 2212-class ~1400Kv motor, 30A ESC, 8″ prop, and a 3S 850–1300mAh pack. Tap your wingspan below for the matched set I actually fly.
Each set is a matched starting point for scratch-built foam planes in that size — the same data behind my Checklist Builder. New to what these parts even do? RC electronics explained in plain English introduces the battery, ESC, motor, receiver and servos first.
👆 Tap a wingspan band to see its matched motor, ESC, prop, battery, and servos.
Starting points, not guarantees — always check your motor's prop chart and your ESC/battery ratings before flying. As an Amazon Associate, I earn from qualifying purchases.
This page matches the power system. The Checklist Builder adds plane type, flying style, control surfaces, and your radio brand — and hands back the full buyable electronics list, receiver and all.
My first-plane build sits in the 24–36″ band: a 2212-class ~1400Kv motor on a 9×6 prop, a 30A ESC, and a 3S 1300mAh pack. Check the agreement: that motor-and-prop combo typically measures under 20A wide open (confirm your own with a wattmeter), the 30A ESC covers it with margin, and the pack at 30C can deliver about 39A (1.3Ah × 30). Every link in the chain is rated above the one before it — that's the whole discipline. Get one link wrong and it's the weakest part that burns, which is exactly what happened on my 30-minute plane: the first motor I grabbed didn't have the thrust for the airframe, and the plane wouldn't stay up until I swapped to a properly sized one.
The plane flies, but you want more pull, so you bolt on a prop one size bigger. More prop is more load: the motor now pulls more current at full throttle, and nothing else in the chain got upgraded. One prop size can be the difference between a 22A setup on a 30A ESC and a 32A setup on the same ESC — and the ESC is now the fuse. Any time the prop changes, re-check the full-throttle draw against the motor, ESC, and battery ratings. The C-rating calculator makes the battery half of that a ten-second check, and Battery & LiPo Basics explains what those pack numbers actually mean.
Power system matched. Get the full electronics list for your plane, then pick the pack that feeds it.
