Actual operation of the Merlin boost regulator

[wedgehead383]

so according to the boost altitude diagramm the overboost function is only possible till 12250 feet are reached- above that altitude the pressure drops constantly and can not be raised e.g. theres no difference in engine power / thermic load between overboost mode and regular full throttle ???

[41Sqn_Banks]

Originally Posted by wedgehead383

so according to the boost altitude diagramm the overboost function is only possible till 12250 feet are reached- above that altitude the pressure drops constantly and can not be raised e.g. theres no difference in engine power / thermic load between overboost mode and regular full throttle ???

Correct. With boost control cut-out the throttle would behave different because the variable datum boost control is bypassed but otherwhise not difference.

[Versuch]

I know its an old thread but here is the boost control unit.