The bell and the whistle on the boiler are believed to have been donated by the Monon Railroad shops in Lafayette. The whistle used exhaust from the engine as its source of compressed gas. Although the cab had marker lights, the only driving light was the single 'cyclops' light mounted high on the front of the boiler. Due to the high placement of the single headlight and a minimal number of other exterior lights, Boilermaker Special I was not driven at night for safety reasons. In honor of the Purdue students and alumni who contributed to the project, the numbers "074041" were later installed in the sides of the headlight.