Comments by "Vikki McDonough" (@vikkimcdonough6153) on "" video.

  1. If my recollection of Taming Liquid Hydrogen is correct, McDonnell Douglas was planning to use balsa wood as the insulation for the S-IV and S-IVB hydrogen tank, but they ended up going with "artificial balsa" made from a combination of fibrous and foam plastics because they couldn't find defect-free pieces of balsa in the necessary sizes.
    1