How much would it cost to build a zeppelin, excalty like the Hindenburg?
You couldn’t do it unless, like the others above have pointed out, you made compromises using modern materials. If you are truly hung up on the word “exactly” then consider what happened to the Hindenburg and ask yourself why would you want to. The Hindeburg caught fire for two reasons. (1)The first was the aluminum based doping compound on the fabric hull was intensely flamable. The compound was used to reflect sunlight to prevent thermal expansion and also to preserve the airship’s hull and give it a nice silver look. (2) The second was obviously the use of hydrogen gas. Easily the best gas to use for boyancy, terrible for safety. Unfortunately helium (the next lightest gas) is nearly four times heavier so I doubt an exact Hidenberg replica would even work effectively if helium was substituted.
