Analyze primary and secondary engine balance forces for common cylinder configurations per SAE standards.
Input Parameters
Results
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Primary Force
N
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Secondary Force
N
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Primary Balance
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Secondary Balance
Note: Inline-4 engines have inherent secondary imbalance requiring balance shafts (Mitsubishi/Lanchester). V6 and flat-6 achieve full balance. SAE paper 2003-01-1724.
Reference
omega = RPM × 2pi / 60
r = Stroke / 2 (m)
lambda = r / Rod_length
Primary Force = m_piston × r × omega²
Secondary Force = F_primary × lambda
Balance depends on cylinder count and crank layout