will be ridiculous compared with the lenght !
But in another hand the 'efficiency' could be very god (if not too heavy)
And the weight is alway our problems when we make 'projection'
Because we just know the metal work and even in alloy for crossing an ocean the minimum structure and tickness we feel right for this use is 'heavy'
For example full loaded 46000lbs for a lwl of 72 '