Print; 400 feet plastic canister;BR TF11/1 reference to old railway technical films catalogue / "Investigation by the engineering section of the LMS Research Department" on frames / B&W, Silent / Reversal / Approx. 250 feet. Experiment with 3 class 5 mixed traffic locomotives, of different weights, adding oil on tracks, close-up shots of wheels to capture wheel slipping (good shot of jumping wheel) and effect on the tracks (shots of bended tracks)