4.12.2 de-bugging

[Pursuivant]

Originally Posted by sniperton

Yep, sorry for my English. The logical way would be to go from 'closed' to 'open', and then backward, from 'open' to closed'. Plus and Minus. No cycling through.

I'm not sure if TD wants to bother with it, but "radiator" settings are even more complex than I thought for some planes.

For example, the P-39 series didn't have preset "detents" for the radiator like I thought. Instead, it had open and shut (i.e., 0 or 100% open) shutters for the Coolant Radiator and the Oil Cooler, as well as what I believe to be a 0-100% slider-type control (in the form of a push-rod that could be elevated or depressed) for carburetor air heat, and a switch for carburetor air filtration.

Carb air heat controls were necessary to prevent engine stoppage at altitude due to carburetor icing. Filter controls allowed the pilot to choose between hot unfiltered air (presumably waste heat from the air or oil cooler systems) and cold filtered air (presumably outside air pulled in via a filter intake).

Likewise, the F6F-5 also had separate shutters for oil coolant and the intercooler.

Things also get complex for the P-51's radiator systems, as this very old thread describes:

http://forums.ubi.com/showthread.php...d-speed-Forums