Aerospace calculators

Hypersonic Boundary Layer Thickness Calculator

– Hypersonic and High-Temperature Gas Dynamics, John D. Anderson, Jr. This formula calculates the boundary layer thickness in hypersonic flows. The boundary layer is a thin layer of air near the surface of a vehicle where the flow velocity changes from zero to the freestream velocity. Understanding boundary layer thickness is critical for predicting drag […]

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Fuel-Fraction Estimation Calculator

– D. Raymer – Aircraft Design. A Conceptual Approach (1992)   Wf​: Weight of the fuel required for the mission. Wo​: Initial takeoff weight of the aircraft. Wx​: Weight of the aircraft after completing the mission (excluding fuel weight). The factor 1.06 accounts for a typical 6% reserve and trapped fuel allowance.

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