Athletes in the various bobsled events go to enormous lengths to achieve greater speed.
Today’s invention is a new form of helmet attachment.
The pilot would have a (yellow) biconcave spacer attached to his helmet.
Similar fitments would be applied to the pushers in eg a four-man bob.
The brakeman would have a tapering helmet attachment as shown (blue).
This would allow a crew to press their heads together during a run and thus greatly smooth their combined aerodynamic profile.