Also, exactly where does the P-38 engine exhaust exit the
engine? Seems to be a big, upward facing pipe in the vicinity
of the turbocharger,

That's it, just behind the turbo, the exhaust waste gate outlet. No place else
to duct it as directly aft is the wheelwell, which is filled not only with the
wheel but engine coolant plumbing, the engine coolant radiators being behind
the wheel well. Just forward of the turbo are two turbine cooling air intakes
and a cockpit heater air intake. Then all the plumbing and ducting for not
only the turbo but oil and intercooler radiators, carburetor, etc. No room at
all, especially compared to a the turbosupercharger set up in something fiarly
straightforward like, say, the B-17. But even the B-17 just pokes the exhaust
gate out of the lower rear of the engine nacelle.


Chris Mark