Aviation Calculators

Screen aviation performance relationships around the POH/AFM numbers: maneuvering speed, category Va, reverse Va/stall/load-factor checks, Va-by-weight tables, stall speed from the lift equation or weight ratio, stall margin, accelerated stall/load factor, V-n/corner speed, turn radius/load factor/standard-rate turn, density altitude/TAS, crosswind, glide, climb, descent, range/endurance, aircraft weight-and-balance CG margin and Part 103 ultralight threshold checks.

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Part 103 ultralight Weight, fuel, max-speed, stall-speed and basic-use thresholds from entered data. Density altitude Pressure altitude, ISA deviation, dry-air density and density-altitude inversion. Aircraft weight and balance Station weights and arms to loaded CG and forward/aft margins. Maneuvering speed Va from 1g stall speed and positive limit load factor. Crosswind component Runway heading and wind to headwind/tailwind and crosswind components.

Maneuvering Speed Calculate Va from 1g stall speed and positive limit load factor, with load-factor caveats for POH/AFM use. Maneuvering Speed by Category Estimate Va from 1g stall speed using common normal, utility, acrobatic or custom load factors. Limit Load Factor from Va Back-solve implied positive limit load factor from maneuvering speed and 1g stall speed. Stall Speed from Va Infer 1g stall speed from maneuvering speed and positive limit load factor. Corner Speed Calculate simplified positive corner speed from 1g stall speed and limit load factor. Va Weight Adjustment Adjust a published maneuvering speed for operating weight using the square-root weight relation when the POH permits it. Va Weight Table Build a Va-by-weight table and chart from published Va, reference weight and actual weight. Stall Speed Estimate stall speed from aircraft weight, wing area, air density and CLmax using the lift equation. Stall Speed Weight Adjustment Adjust a published stall speed for actual weight using the square-root weight relation. Stall Margin Check available load factor, accelerated stall speed and airspeed margin for a planned g load. Load Factor Find coordinated level-turn load factor from bank angle and the accelerated stall speed from 1g stall speed. Bank Angle from Load Factor Convert load factor to equivalent coordinated level-turn bank angle and accelerated stall speed. Accelerated Stall Speed Calculate accelerated stall speed from 1g stall speed and load factor, with equivalent level-turn bank angle. Turn Radius Coordinated level-turn radius, turn rate and load factor from airspeed and bank angle. Turn Load Factor Calculate coordinated-turn load factor, bank angle and turn rate from true airspeed and turn radius. Standard Rate Turn Bank angle, radius and load factor for a standard-rate or target-rate turn from true airspeed. Density Altitude Estimate pressure altitude, ISA temperature deviation, dry-air density altitude and the 120 ft/C quick check from field elevation, altimeter setting and OAT. True Airspeed Estimate TAS from equivalent or approximate calibrated airspeed, pressure altitude and outside air temperature. Crosswind Component Headwind, tailwind, steady crosswind and gust crosswind components from wind direction, runway heading and speed. Glide Distance Still-air glide distance, descent angle, sink rate and time from altitude, glide ratio and glide speed. Climb Gradient Convert climb rate and ground speed into climb gradient, feet per nautical mile, climb angle and obstacle-height gain. Descent Planning Top-of-descent distance, descent time, actual descent angle and required descent rate for a target path. Aircraft Range & Endurance Endurance, reserve time, usable cruise time and still-air range from fuel quantity, burn rate and ground speed. V-n Diagram Simplified V-n envelope corner speeds from positive/negative stall speeds, limit loads and Vne. Approach Speed Estimate base Vref, gust additive and target approach speed from Vso and a reference factor. Aircraft Weight & Balance Calculate loaded aircraft weight, total moment, CG arm and margin to forward/aft CG limits from station weights and arms. Part 103 Ultralight Screen powered or unpowered ultralight weight, fuel, speed and basic use thresholds against 14 CFR Part 103.1.

This aviation cluster is built around the relationships pilots, instructors, builders and aircraft owners check against the approved POH or AFM. The maneuvering speed calculator uses Va = Vs x sqrt(n) to estimate the speed tied to a 1g stall speed and positive limit load factor, while the maneuvering speed by category calculator applies common normal, utility or acrobatic category load factors. Reverse checks include load factor from Va, stall speed from Va and the corner speed calculator.

For the aerodynamic side, the stall speed calculator starts from the lift equation, Vs = sqrt(2W/(rho S CLmax)), and returns stall speed plus wing loading. The stall speed weight adjustment calculator applies the weight-ratio square root, the accelerated stall speed calculator applies Vs_n = Vs x sqrt(n), and the stall margin calculator compares current speed with a planned load factor. For weight-sensitive Va work, use Va weight adjustment or the Va weight table calculator.

Turn and load screens include the load factor calculator, bank angle from load factor, turn radius, turn load factor, standard-rate turn and V-n diagram. Operational planning screens cover density altitude, true airspeed, crosswind components, glide distance, climb gradient, descent planning, range and endurance, approach speed and aircraft weight and balance. For homebuilt and ultralight screening, the Part 103 ultralight calculator compares entered weight, fuel, speed and basic use data with 14 CFR 103.1 thresholds.

These are training and screening calculators, not operational authority. Aircraft placards, limitations, approved flight manuals, current FAA rules, instructor guidance and current weather/airport data control real decisions.

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What is maneuvering speed (Va)?

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