There's lots of data that shows TT helmets reduce aerodynamic drag. My question relates to the aerodynamics of a TT helmet with your head dropped downward. Intuitively, one might think the TT helmet would actually increase drag. However, there is some indication that TT helmets, even with your head dropped are more aero, than a conventional helmet.
Because I'm too cheap to pay $25 to read one chapter of a book online, I thought I'd ask here.
The specific reason for my question is we're doing the tandem division of the State Time Trial championship ( I'm asking here rather than the tandem forum becasue there is a lot more racing knowledge here.)
My stoker in time trial position has her head pretty much straight down, which isn't worth changing given that the stoker doesn't need to see where we're going.
So, is it worth buying a TT helmet for the stoker, knowing that the rear of the helmet is going to be pointed upward the majority of the time. I'm tending to lean that way.
However, given a general a lack of fitness/talent, I don't want to pass up an opportunity to buy speed.