[1] suggests that a suitably designed helmet reduces drag by a fair amount, which probably offsets the weight increase. [1] https://ir.canterbury.ac.nz/bitstre

[1] suggests that a suitably designed helmet reduces drag by a fair amount, which probably offsets the weight increase. [1] https://ir.canterbury.ac.nz/bitstream/handle/10092/7804/Thesis_fulltext.pdf https://ir.canterbury.ac.nz/bitstream/handle/10092/7804/Thes...