Aircraft Center of Gravity
Compute the center-of-gravity (CG) position of an aircraft with two weight stations, CG = (W₁·a₁ + W₂·a₂)/(W₁ + W₂), the total moment divided by the total weight, measured from a reference datum. The CG must stay within a safe envelope: too far forward the aircraft is nose-heavy and hard to rotate; too far aft, unstable. It is an essential part of the weight-and-balance check before each flight. Enter the weights and arms of the two stations.
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Centro de gravidade da aeronave
Antes de cada voo, calcula-se onde está o centro de gravidade (CG) da aeronave carregada — um dos itens de segurança mais críticos. Com duas estações de peso (ex.: cabine e bagageiro), o CG = (P₁·b₁ + P₂·b₂)/(P₁ + P₂): a soma dos momentos (peso × braço a partir de um datum de referência) dividida pelo peso total. O CG precisa cair dentro de um envelope aprovado. À frente demais, o avião fica 'pesado de nariz', exige mais força no profundor e pode não arfar na decolagem; atrás demais, torna-se instável e pode entrar num estol/parafuso irrecuperável. Carga e combustível deslocam o CG durante o voo. Informe os pesos e os braços das duas estações.
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