The ST-4 (originally dubbed 'ST Humming Bird') was produced in massive numbers at short notice towards the end of the war. It had extremely low production cost and was used for both scout recon missions and combat.
But due to the rush in production, it suffered from a fatal flaw in balance, and ranked as the most common ship to spontaneously crash in the fleet. Apparently this was halfway foreseen by the designers of the ST-4 as it featured the best eject and life support systems. Over time it was nicknamed 'The Cat' by pilots surviving up to 9 crashes in the ST-4.
Edit: just tweaked the cockpit a bit and added the process ^^