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Subject: Further to the SUN 100 Distance
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Feathers, et al:

When one studies the SUN 100 course, it can be shown that there are at least 
4 turns:
Off the runway, East bound, then to South bound, 92 to 178 degrees (86 deg 
turn);
East corner turn to West, 178 degrees to 275 (97 deg turn);
West corner to NE, 275 to 41 (126 deg turn); and finally
NE back to the runway, 41 to 92 (51 deg turn) for a total of 360 high speed 
turning degrees.

Using Fig 2.29 (Constant Altitude, Steady Turn Performance) in "Aerodynamics 
for Naval Aviators" (NAVWEPS 00-80T-80) on can find that at 200 KTAS and a 60 
degree banked turn, the radius is 2000 feet.  Thus, Pi x D = 12566 feet or 
2.07 Nautical Miles.

The turning radius for 200 KTAS, 30 degrees is about 6000 feet or 3 times 
that of a 60 degree turn.  Thus, taking turns at 30 degrees would add 6.2 NM 
to the course. 

Grayhawk
N92EX

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<HTML><FONT FACE=3Darial,helvetica><FONT  SIZE=3D2 FAMILY=3D"SANSSERIF" FACE=
=3D"Arial" LANG=3D"0">Feathers, et al:<BR>
<BR>
When one studies the SUN 100 course, it can be shown that there are at least=
 4 turns:<BR>
Off the runway, East bound, then to South bound, 92 to 178 degrees (86 deg t=
urn);<BR>
East corner turn to West, 178 degrees to 275 (97 deg turn);<BR>
West corner to NE, 275 to 41 (126 deg turn); and finally<BR>
NE back to the runway, 41 to 92 (51 deg turn) for a total of 360 high speed=20=
turning degrees.<BR>
<BR>
Using Fig 2.29 (Constant Altitude, Steady Turn Performance) in "Aerodynamics=
 for Naval Aviators" (NAVWEPS 00-80T-80) on can find that at 200 KTAS and a=20=
60 degree banked turn, the radius is 2000 feet.&nbsp; Thus, Pi x D =3D 12566=
 feet or 2.07 Nautical Miles.<BR>
<BR>
The turning radius for 200 KTAS, 30 degrees is about 6000 feet or 3 times th=
at of a 60 degree turn.&nbsp; Thus, taking turns at 30 degrees would add 6.2=
 NM to the course. <BR>
<BR>
Grayhawk<BR>
N92EX</FONT></HTML>

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