Here's the Tweet's replacement, the T-6 Texan II. Yup, a turbo prop. Never thought I'd see a new prop plan again, but here it is. Oh, the IPs don't like it. Tandem seating is fine in an advanced trainer, but it's awful in a primary trainer. Plus there are some serious design problems with it. In its original form (I’m told it comes from a Swiss Pilatus design) it was great, but the US version uses an engine that's was never intended for frequent and large throttle movements, nor high-G use. Worst of all, to date two of of six ejection seats has failed to fire!