The Teague-Welch-Banks Streamliner is a purpose-built land-speed machine that proved what a single-piston engine combination could do on the salt. This car reset the FIA 5L to 8L Class Ten two-way record at 405.976 mph after previously setting the 8L and larger Class II record at 425.050 mph, with a best one-way pass of 432 mph. The point is simple: this streamliner was built to stay stable, efficient, and fast enough to put a single-piston hot rod into record territory well past 400 mph.
The clip reports measured speed figures from two points in a run. The first-mile speed is given as 388.555. A second figure, 48810 42.785, is also spoken in the same sequence, but the transcript fragment is too incomplete to identify its exact meaning with confidence. The final reported result is a last-mile speed of 375.996.
Because the provided source is only a short fragment rather than a full technical discussion, there is not enough context to reconstruct a broader engineering narrative, identify the vehicle or equipment involved, or explain the testing conditions, methodology, or conclusions. The usable information in the fragment is limited to the stated measured results.
The clearly recoverable values from the transcript are 388.555 for the first-mile speed and 375.996 for the last-mile speed. The intervening spoken sequence appears to include another number ending in 42.785, but the surrounding words are too unclear to present it as a verified specification or result.
Based on the fragment alone, the video appears to be announcing speed measurements from a timed or distance-based run, including first-mile and last-mile figures. No reliable technical explanation, hardware detail, or performance analysis can be extracted beyond those announced numbers without adding unsupported assumptions.