Quantcast Practice Problems Answers -Cont. - P-2030180

 

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9
TC TA DIR
KT X- WCA TH H/ T GS
S
S
4 147 210 135 \
45  9 L 3 L 14 44 H 16
4
4
6
4 159 541 245 \
35  3 R 4 R 16 2 H 53
5
5
3
9
4 257 687 155 \
60  5 L 5 L 25 12 T 69
6
9
2
9
4 248 214 265 \
25  7 R 2 R 25 24 H 19
7
0
0
4 205 368 175 \
70  3 L 5 L 20 61 H 30
8
5
0
7
4 159 985 285 \
15  1 R 1 R 16 9 T 99
9
2
0
4
5 167 623 195 \
80  3 R 3 R 17 71 H 55
0
8
0
2
B.
1.
25000
2.
CAS 187
TAS 242
GS 250
PRESSURE ALT 17360 CROSS-WIND 45L
H/T WIND 8T
CRAB 11L  TH 319
3.
A.
197
B.
1427
4.
Yes. Your original plan, question #3, had you at 30,000' flying 300kts
TAS. Spinning the winds (280/22 kts) gives you 22 kts of headwind and a
resultant ground speed of 278 kts on a course of 275T.
After your instructor changed the plan you chose to go to 39,000', which gave
you an OAT of -75 and winds at 320/65 kts. A CAS of 190 kts at this altitude
and temperature gives you a TAS of 333 kts. Spinning the winds gives you 45
kts of headwind resulting in a ground speed of 288 kts on a course of 275T.
Therefore going higher, in this case, gets you to San Diego faster.
5.
CAS 298
TAS 322
GS 276
PRESSURE ALT 12360 CROSS-WIND 46L
CRAB 8L  TH 327
H/T WIND 46H
4.A-180


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