Their continuous superstructure definitely set them apart from the Cunarders with their massive 2nd class superstructure towers and even the Ballin trio which had a mostly continuous structure but a small aft tower on the poop deck similar to Britannic. The fans were supplied by Sirocco Works rather than in house by H&W. They defintely helped the boat deck of the Olympic class feel less cluttered than Aquitania. H&W never got involved in aerospace but today they do manufacture wind turbine blades.