Having done more single engine performance test flights on light twins than I care to remember, a couple of pointers.
1. The Vmca (Blue line speed) is calculated at full power and sea level, at JHB density altitudes a normally aspirared engine gives about 75% power (approx). This means single engine Vmca is about 3-5 Kts below blue line.
2. 5 deg into the live engine and 1/4 ball out are must haves, if not they don't climb, the the exeption being a BN2A which just point blank refused to climb no matter what.
