Originally Posted by
phiggsbroadband
Quote... Can anyone quote me the power loss for full power with carb. heat on?
Well maybe not in terms of BHP, but on the Power Check, done at 1700 rpm it gives an rpm drop of 75rpm.
So my guess would be a drop of 100 rpm at full throttle, say 2500 down to 2400rpm. ( -4%.)
btw... Why are you using full power, are you in the climb?
That is why you select carb heat off after you have applied full power if you have to go around !
As for the power loss why is there such a huge issue about the potential power loss for the brief time the engine is at full power but before you have selected carb heat off, but
no thought given about the power loss you will get if you apply full power to an engine that has already started to develop carb ice because it was selected off on final
.
This is the exact scenario you setting your self up for following the stupid, and apparently universal to UK flight training, practice of selecting carb heat off on final.
Under the right conditions carb ice can develop in seconds, certainly in the time the aircraft went from 200 feet on final to the start of the landing flare at a very low power setting.