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JSBSim Aerodynamics: Difference between revisions
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This table can drop directly into an [[aeromatic]] [[FDM]] to replace an instance of aero/alpha-rad or aero/beta-rad (changing the independent var of course). | This table can drop directly into an [[aeromatic]] [[FDM]] to replace an instance of aero/alpha-rad or aero/beta-rad (changing the independent var of course). | ||
* Calculating Stall Speed - For an aircraft in straight and level flight, lift is equal to the weight of the aircraft. If we plug some numbers into the equation | |||
lift = QBar * Sw-sqft * Cl | |||
Using the Fi-156 Storch as an example | |||
Weight = 2688 lb | |||
Wing Area = 280 sq-ft | |||
Stall Speed = 32 mph | |||
Air Density = 0.00238 slugs/ft^3 | |||
QBar = 0.11139 (slug ∕ (ft^2 * s)) | |||
We get | |||
2688 lb = 0.11139 (slug ∕ (ft^2 * s)) * 280 ft^2 *Cl | |||
Cl = 2688 lb / (0.11139 (slug ∕ (ft^2 * s)) * 280 ft^2) = 2.68 seconds, which is the wrong answer. :( | |||