|Brass plaque showing one of Louis Brennan's inventions, Sapper's walk, Gillingham|
Image credit: SM Jenkin
His inventions included the dirigible torpedo, a monorail and a helicopter. Apparantly some of the money from his most famous invention paid for the alterpiece at St Mary's RC church in Ingram Road, Gillingham
I'll be investigating the information held at the Royal Engineers museum, maybe they'll have some information about his factory, that was apparantly near pier road.
Mayo libraries have an interesting write-up about him here