Rigid-body statics for your drivetrain: how hard you can turn or accelerate before two wheels lift, the tip angle on a ramp or cross-slope, whether you slide or tip first, and how hard you can push. Everything recomputes live.
Figures: 2026 REBUILT season (Game Manual R103 / R104). Verify weight, envelope, carpet spec, and vendor µ against the current FIRST Game Manual — these change most seasons.
Lateral wheel-contact spacing. Default 27 in (R104-bounded estimate — adjust to your drivetrain).
Fore/aft wheel-contact spacing. Default 27 in (R104-bounded estimate).
Engineering estimate, NOT a published spec — the #1 error source. A 2 in miss moves every result 10–20%. Measure it (balance/tip test).
Robot + bumpers + battery. Default 125 lb is an estimate — enter your measured weight.
Highest-traction common FRC tread. Community values cluster ~1.1–1.3 (AndyMark blue-nitrile page lists no numeric CoF).
Community / historical estimates — not currently vendor-published. Preset seeds the low end of the range; slide within it or measure your own.
F ≈ µ · f · weight. Only as accurate as µ (~1.1–1.3); treat as a range, not a certified number.
Tier 1 (exact): tip accelerations, SSF, and tip angles are rigid-body statics — as correct as your inputs. Tier 2 (estimate): pushing force and the slide-vs-tip verdict depend on µ, which is empirical and variable.
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