And FYI there is no such thing as a "supercharged" TCM "flat" or horizontally-opposed engine.
While some folks back in the "olden days" sometimes used the term "turbo-supercharged" (including TCM by the way) it has generally fallen into disuse.
charger is an induction air compressor (more air = more power) driven by an exhaust gas turbine. A super
charger, as in automotive use too*, is a direct-drive, gear or belt driven induction air compressor. Many radial engines have integral superchargers behind their accessory sections driven directly by the back end of the crankshaft. Lycoming built a couple of series of supercharged flat engines too, but a LONG time ago and they are very rare these days. They were the GSO-
(meaning Geared, Supercharged, Opposed - and either Fuel I
njected or not) 480
CID engines, and they were typically rated for 340 and 380 hp respectively. They were used on old "bathtub" nacelle Aero Commanders (models 680) T-Bones, Queen Aires, etc. Note too that Lycoming produced non-supercharged versions of the same engines with less power, such as the 270 - 295 hp GO-480
TCM, maker of the 550 series engines, made O-
, and GTSIO-520
series engines (the latter two of which being a "Turbo-Supercharged, Injected, Opposed" engines without and with a Spur-type G
ear reduction respectively.) AFAIK there are only IO-
, and TSIOL-
550 CID series engines made by TCM. (The last of which is L
iquid cooled, but again, that's another rarity.)
P&W R-2800 supercharged radial:
Supercharged Lycoming engine (supercharger is the round component on the back (right) side of the engine - in between the pressure carb or fuel injection servo as applicable and the accessory section where the starter, generator, etc. are mounted.
*The automotive supercharger below is the chrome piece in between the carbs and the valve covers (sitting on top of the intake manifold) and it is driven at the top by the belt off of the crankshaft pulley at the bottom with an idler pulley in between. Look familiar? Surely you remember seeing "muscle cars" with engines like this...