Also, the dimensions for the zeppelin are diameter (not radius) and length, so multiply by Pi - and then divide by 3 since not all of it will be visible to the sun at once.
Converting feet^3 to meter^3 is non obvious because of the ^3 - that would be my guess for where you had an error.
> mW == megawatt.
1.4 MW is not 1.8 million HP, it's 1.8 thousand hp.
For quick calculations like these I've found that the GNU 'unit's command is actually very useful. Keep your prefixes straight and it will confirm your units as well:
Also, the dimensions for the zeppelin are diameter (not radius) and length, so multiply by Pi - and then divide by 3 since not all of it will be visible to the sun at once.
Converting feet^3 to meter^3 is non obvious because of the ^3 - that would be my guess for where you had an error.
> mW == megawatt.
1.4 MW is not 1.8 million HP, it's 1.8 thousand hp.