Quote:
Originally Posted by jamesqf
That depends on your definition of "excessive". Ever try to glide one, and compare the performance to even an old Schweitzer trainer?
Seriously, though, do you suppose the lack of effect of nose aerodynamics on single-engine performance might have something to do with the propellor hanging out in front, and shielding the nose from the actual airflow?
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Yes, I own a 177RG. With the prop spinning (engine dead), the drag is incredible. The big windmill out there creates, in essence, a solid disk. With the prop spinning, but with it nearly feathered, the drag is greatly reduced. With the prop stopped (very difficult to achieve, btw) the glide is nearly double.
No, the airflow is more rapid over the nose, with the engine producing power. Still, the drag is quite minimal. Testing shows that no performance or speed improvement is practically possible with simple nose mods on my aircraft. HOWEVER, reduction in cooling drag results in a 6 knot increase in speed. This has everything to do with engine baffles, cowl exit and inlet size and incredibly little to do with shape. Take a look at the FLAT "cup" area under the prop. Conventional wisdom would say "that is horrible". However, a comprehensive re-work of that area gains NOTHING. Even at it's 163MPH cruise speed.
