RC aircraft numbers, drawn out.

Three questions every scratch build and every new ARF asks: where does the CG go, will it balance, and is the power system right. Hangar answers all three on one screen each.

WING AND CG

• Tapered, swept planform from half span, chords and tip setback, drawn to scale
• Mean aerodynamic chord, its position, aerodynamic centre and aspect ratio
• Neutral point from the tail volume, CG at the static margin you choose (5% sport, 10% trainer, 15% very stable), or flying-wing mode
• Wing loading in oz/ft² and g/dm², cube loading with a plain-English category, stall and approach speed

WEIGHT AND BALANCE

• Gear list with weight and distance from the nose, plus the bare airframe
• As-built CG against the target, the offset, and the fix: the exact battery position, or ballast and where
• Side-view drawing with every item

POWER SYSTEM

• Loaded rpm, shaft and electrical watts, current, watts per pound with a flying-style guide
• Static thrust and thrust to weight, pitch speed, flight time at your average throttle
• Battery, motor and ESC limits checked

Who it's for

Scratch builders, foamboard flyers, ARF assemblers and anyone re-powering an old airframe.

What you get

• Hangar (one .html file, runs in your browser, offline)
• A 2-page quick-start guide

Good to know

• One file. No install, no account, no subscription, no internet needed after download.
• Your data stays on your computer. Export a backup any time; import it on another machine.
• Built for a computer screen: Windows or Mac, in Chrome, Edge, Safari or Firefox.
• Instant download.

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