It soon became clear that the track profiles were so flat that ground resistance during a turn was excessive .
On 9 September the Number 1 Lincoln Machine , as the prototype was then known , made its first test run in the yard of the Wellington Foundry .
Number 1 Lincoln Machine soon became clear that the track profiles were so flat that ground resistance during a turn was excessive .
On 9 September the Number 1 Lincoln Machine , as the prototype was then known , made its first test run in the yard of the Wellington Foundry .