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1. Note the engine cooling exit vent on the AR-5. At the very least, this is a good example of how engine air could/should be vented from a car engine bay back into the slipstream and past the belly pan.
2. Remarkable as it is, the AR-6 is still probably not as efficient as the Strojnik Laminar Magic.
3. Google for "Davis DA-11" and note that even without much aerodynamic refinement, Davis' little ~165 lb. plane got over 100 mpg cruising at ~130 mph on a 20 hp lawn mower engine. What would the DA-11 do with aero cleanup of landing gear, wing roots and tips, etc.?
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