The bench
Draw it by number
Span, chord, sweep, tail arm, ballast. Four layouts to work in, and every value has a slider and a field for the exact figure.
A drafting bench for paper, balsa & foam gliders
Span, chord, sweep, tail arm, ballast — every value has a slider and a field for the exact figure. Eighteen calculated numbers update while you drag, a verdict badge tells you whether that balance point flies or fights you, and a Runge-Kutta simulator replays the whole glide with the numbers behind it.
Design · Trim · Fly
The bench works the way a real one does: draw, read the figures, throw, write it down. Four tabs, one loop.
The bench
Span, chord, sweep, tail arm, ballast. Four layouts to work in, and every value has a slider and a field for the exact figure.
The readout
Eighteen calculated figures update while you drag. The verdict badge tells you whether that balance point flies or fights you.
The throw
A Runge-Kutta simulator takes your airframe, your launch angle and the wind, then replays the whole glide with the numbers behind it.
The log
Flights, personal bests, build briefs and fifteen lessons that use your own airframe's figures as the example.
Static margin as a share of the mean aerodynamic chord. Sport is where a thrown glider wants to sit — quick to respond, but it settles on its own.
What's on the bench
The same numbers a sailplane designer works with — neutral point, tail volume, glide polar — applied to things you fold, cut and throw.
Pick the shape and the bench changes what it asks for and how it judges the answer.
Flat plate to reflexed section; a sheet of A4 to carbon-reinforced balsa. Each one changes the mass, the drag build-up and where the best glide sits.
Wing area, aspect ratio, MAC, neutral point, static margin, tail volume, trim CL, L/D max, best glide speed, minimum sink, Reynolds number — recalculated on every change, with a plain-English caption under each.
Launch speed, angle and height, headwind, crosswind, altitude. Four launch styles from a gentle release to a high-start tow. Replay the side view, scrub the chart, and get a verdict: Clean Glide, Phugoid Porpoising, Stalled and Dropped, Nosed In, Spiral Away or Wind Carried.
Ask why it porpoises and get one change to try, not a lecture. Flight Debrief reads the replay and sends the fix straight to Drafting. Works offline too — the bench's own rule engine answers, shorter but never absent.
Fifteen lessons from wing loading to why the foreplane must stall first, each with a quiz that explains every wrong answer — and uses your own airframe's figures as the worked example.
Save every airframe, lay up to five side by side on one glide polar, and take on build briefs — a brief closes itself the moment a saved airframe satisfies every line of it. Nothing to submit, nothing to tick. Evening reminders take yesterday's draft outside; a weekly review reads seven days of throws.
Presets
Open one in Drafting, or add it to the hangar and change a single number to see what happens.
A folded dart. High speed, tiny wing, glide ratio you can count on one hand.
Long, slim wing on a light stick. Slow, patient, gives back every metre of height.
Tailless and swept, held in trim by a reflexed section and three degrees of wash-out.
Foreplane loaded harder than the wing on purpose, so the nose drops before the wing quits.
Two wings sharing the lift. Enormous total area, a balance point that is fussy to find.
Balsa, thrown hard, built to climb off the throw and circle back down.
Huge area against almost no mass. Sinks slower than anything else on the bench.
A radio trainer wing: thick section, no taper, forgiving to the point of being dull.
Logbook
Sixteen badges from the first fold to the hundredth flight, and four pilot levels earned two points per saved airframe, one per completed test flight.
Contact
A glider that won't settle, a figure that looks wrong, a lesson you'd like added — write and it'll get an answer.
Support: dankilam106@gmail.com
WingWright keeps its hangar, log and lessons on your device. See the Privacy Policy for what the app does and doesn't collect.
Free on iPhone. Design, trim, fly — and keep every throw.