My main memories of the Skyvan are the Loganair one (GAWCS?) departing Glasgow and by the time he turned downwind, he was passing about 5000ft . Oh and the Shorts company hack departing Farnborough and depositing a cabin window pane on the runway, discovered during runway inspection next day.
I once owned a Monnet Moni homebuilt which definitely had a lifting fuselage; it would do 90mph indicated on a 29 hp engine.