I was about to post those pics, fastmongrel.
I think what the real issue here is, is that what is termed 'single-spar' is a misnomer. A single spar wing is a theoretical construct (unless we're talking helicopter rotor blades). But, wings have been termed 'single spar' even if they have multiple spars, but most of the loads being transferred through one main spar.
I think what the real issue here is, is that what is termed 'single-spar' is a misnomer. A single spar wing is a theoretical construct (unless we're talking helicopter rotor blades). But, wings have been termed 'single spar' even if they have multiple spars, but most of the loads being transferred through one main spar.