The Motor Scout was the first armed petrol engine powered vehicle ever built.
It was not intended for running over ploughed fields or charging, but it was designed to provide a cover or to support infantry and cavalry wherever good roads were available.
He mounted a standard mark IV Maxim machine gun above the front wheels of a quadricycle.
The Maxim gun, with its readily accessed 1,000 rounds of ammunition, took the place of a second rider.
Simms put an iron shield in front of the car for the driver's protection.