- Why is engineModel a stringstream instead of just a string? You can't assign to a stringstream like that. How are you planning on using this class?
- "T-"2983.88 is not a valid string or number - it's some frankenstein thing in-between them.
- You generally should not put "using X" declarations in the global part of a header file because then you force the user of that header to pollute the global namespace.