Eric Robb RC Eric Robb RC RC Builds · Custom Parts · Backyard Engineering
Free Tool

Electronics Checklist Builder

Answer a few questions about the plane you're building and get a complete electronics starting point — motor, ESC, prop, battery, servos, and radio. Built for beginner, scratch-built foam planes.

1. Wingspan
2. Plane type
3. Flying style
4. Control surfaces
5. Transmitter status
6. Transmitter brand (or the one you're considering)
Want the full design — CG, thrust, servo placement? This tool sizes your electronics; the Airplane Designer takes it further with your CG location, wing loading, thrust plan, and a to-scale plan view.

Stop guessing which parts fit together

The hardest part of a first RC airplane isn't the building — it's buying five electronic parts that actually work as a system. The motor, ESC, battery, propeller and servos all have to agree, and a mismatch is how beginners burn out an ESC or end up with a plane that won't leave the ground. This builder turns your plane's size and style into one matched, buyable checklist.

Why parts have to match

Your motor sets how much current the system pulls; your ESC has to be rated for at least that current (with headroom); your battery has to supply it safely (enough cells and a high enough C-rating); and your prop is the throttle on all of it — too big a prop on the wrong motor pulls more amps than the ESC or battery can take. Get one wrong and you cook a component on the first flight.

What you get

Answer a few questions about your wingspan and how you want it to fly, and you get a complete parts list — motor Kv and size, ESC amp rating, battery cell count and capacity, prop size, servo count, and a radio — each linked to a specific product picked for the spec, not a generic search.

Common questions

What size motor for a 30-inch foam plane? Typically a 2212-class motor around 1400Kv on a 3S battery — exactly what this builder recommends for that size. How many amps should my ESC be? Rated above your motor's peak draw with margin; the builder sizes it for you. Then what? Take the list to the Wiring Designer to see how it all connects.

Next in the Eric Robb Builder System

Next: wire it up

Parts picked? See exactly how they connect — in the right order, without frying anything.

Open the Wiring Designer → All tools