Measured drag in flight
Responses for D120A post 8, and Algy post 9;
Sorry folks it is all so long ago that I do not remember the drag results on the Twin Pioneer or the 748. On both aeroplanes this was during a busy development period doing drag assessments plus engine out climb performance checks and engine cooling compliance checks.
Before the 748 tests in December 1960, the preparation included practice 'deadstick' landings with one engine feathered and one at a nominal zero thrust setting. On the day we did four measured descents, so we managed to unfeather and restart each time without drama.
asmccuk