Boris Bajic
Guest
Particularly if they aren't wearing a helmet at the time....
I find this post as flippant as it is unhelpful.
Cycle helmets are not designed to offer protection from cannon balls. Incoming ballistic weaponry did not fall within the design remit.
The best protection from injury by a cannon ball is not being born near a recruiting office for the Army or Navy in the early 19th Century.
The appropriate data can be found here: www.html.cannonandtheireffectonfleshandboneinthemodernwar1812.com