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AIRFOIL: NACA 0018
DATA: Drag Coefficients
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ORIGINAL SOURCE: Sheldahl, R. E. and Klimas, P. C., Aerodynamic
Characteristics of Seven Airfoil Sections Through
180 Degrees Angle of Attack for Use in Aerodynamic
Analysis of Vertical Axis Wind Turbines, SAND80-2114,
March 1981, Sandia National Laboratories, Albuquerque,
New Mexico.
NOTES: The data herein were synthesised from a combination of
experimental results and computer calculations.
The original report contains data for lower Reynolds numbers
than contained herein, but there are some anomalies, in
particular with CL at small angles of attack.
Data extended to 360 degrees of attack and glaring anomalies
corrected by L. Lazauskas. All deviations from the original
are due to L. Lazauskas.
Please refer to the original report for more details.
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Drag Coefficient
-------------------------------- REYNOLDS NUMBER -----------------------
ALPHA 40000 80000 160000 360000 700000 1000000 2000000 5000000
------------------------------------------------------------------------
0 0.0214 0.0162 0.0128 0.0101 0.0085 0.0082 0.0077 0.0073
1 0.0215 0.0163 0.0129 0.0102 0.0087 0.0082 0.0077 0.0073
2 0.0219 0.0167 0.0131 0.0104 0.0088 0.0083 0.0078 0.0075
3 0.0225 0.0172 0.0137 0.0107 0.0091 0.0086 0.0080 0.0077
4 0.0235 0.0181 0.0144 0.0112 0.0096 0.0089 0.0084 0.0079
5 0.0247 0.0192 0.0153 0.0121 0.0102 0.0095 0.0087 0.0083
6 0.0263 0.0206 0.0166 0.0132 0.0112 0.0102 0.0093 0.0087
7 0.0282 0.0223 0.0181 0.0145 0.0123 0.0115 0.0101 0.0093
8 0.0303 0.0242 0.0198 0.0159 0.0136 0.0126 0.0111 0.0100
9 0.0327 0.0264 0.0217 0.0176 0.0150 0.0139 0.0122 0.0108
10 0.0620 0.0288 0.0238 0.0194 0.0166 0.0154 0.0134 0.0117
11 0.0925 0.0315 0.0262 0.0213 0.0183 0.0170 0.0148 0.0128
12 0.1230 0.0800 0.0288 0.0235 0.0202 0.0187 0.0163 0.0140
13 0.1405 0.1190 0.0770 0.0259 0.0223 0.0206 0.0179 0.0153
14 0.1580 0.1580 0.1580 0.0940 0.0245 0.0227 0.0197 0.0168
15 0.1770 0.1770 0.1770 0.1450 0.1020 0.0251 0.0218 0.0185
16 0.1960 0.1960 0.1960 0.1960 0.1960 0.1080 0.0240 0.0203
17 0.2170 0.2170 0.2170 0.2170 0.2170 0.1730 0.1200 0.0223
18 0.2380 0.2380 0.2380 0.2380 0.2380 0.2380 0.2380 0.0244
19 0.2600 0.2600 0.2600 0.2600 0.2600 0.2600 0.2600 0.1400
20 0.2820 0.2820 0.2820 0.2820 0.2820 0.2820 0.2820 0.2820
21 0.3055 0.3055 0.3055 0.3055 0.3055 0.3055 0.3055 0.3055
22 0.3290 0.3290 0.3290 0.3290 0.3290 0.3290 0.3290 0.3290
25 0.4050 0.4050 0.4050 0.4050 0.4050 0.4050 0.4050 0.4050
30 0.5700 0.5700 0.5700 0.5700 0.5700 0.5700 0.5700 0.5700
35 0.7450 0.7450 0.7450 0.7450 0.7450 0.7450 0.7450 0.7450
40 0.9200 0.9200 0.9200 0.9200 0.9200 0.9200 0.9200 0.9200
45 1.0750 1.0750 1.0750 1.0750 1.0750 1.0750 1.0750 1.0750
50 1.2150 1.2150 1.2150 1.2150 1.2150 1.2150 1.2150 1.2150
55 1.3450 1.3450 1.3450 1.3450 1.3450 1.3450 1.3450 1.3450
60 1.4700 1.4700 1.4700 1.4700 1.4700 1.4700 1.4700 1.4700
65 1.5750 1.5750 1.5750 1.5750 1.5750 1.5750 1.5750 1.5750
70 1.6650 1.6650 1.6650 1.6650 1.6650 1.6650 1.6650 1.6650
75 1.7350 1.7350 1.7350 1.7350 1.7350 1.7350 1.7350 1.7350
80 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800
85 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000
90 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000
95 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800
100 1.7500 1.7500 1.7500 1.7500 1.7500 1.7500 1.7500 1.7500
105 1.7000 1.7000 1.7000 1.7000 1.7000 1.7000 1.7000 1.7000
110 1.6350 1.6350 1.6350 1.6350 1.6350 1.6350 1.6350 1.6350
115 1.5550 1.5550 1.5550 1.5550 1.5550 1.5550 1.5550 1.5550
120 1.4650 1.4650 1.4650 1.4650 1.4650 1.4650 1.4650 1.4650
125 1.3500 1.3500 1.3500 1.3500 1.3500 1.3500 1.3500 1.3500
130 1.2250 1.2250 1.2250 1.2250 1.2250 1.2250 1.2250 1.2250
135 1.0850 1.0850 1.0850 1.0850 1.0850 1.0850 1.0850 1.0850
140 0.9250 0.9250 0.9250 0.9250 0.9250 0.9250 0.9250 0.9250
145 0.7550 0.7550 0.7550 0.7550 0.7550 0.7550 0.7550 0.7550
150 0.5750 0.5750 0.5750 0.5750 0.5750 0.5750 0.5750 0.5750
155 0.4200 0.4200 0.4200 0.4200 0.4200 0.4200 0.4200 0.4200
160 0.3200 0.3200 0.3200 0.3200 0.3200 0.3200 0.3200 0.3200
165 0.2300 0.2300 0.2300 0.2300 0.2300 0.2300 0.2300 0.2300
170 0.1400 0.1400 0.1400 0.1400 0.1400 0.1400 0.1400 0.1400
175 0.0550 0.0550 0.0550 0.0550 0.0550 0.0550 0.0550 0.0550
180 0.0250 0.0250 0.0250 0.0250 0.0250 0.0250 0.0250 0.0250
185 0.0550 0.0550 0.0550 0.0550 0.0550 0.0550 0.0550 0.0550
190 0.1400 0.1400 0.1400 0.1400 0.1400 0.1400 0.1400 0.1400
195 0.2300 0.2300 0.2300 0.2300 0.2300 0.2300 0.2300 0.2300
200 0.3200 0.3200 0.3200 0.3200 0.3200 0.3200 0.3200 0.3200
205 0.4200 0.4200 0.4200 0.4200 0.4200 0.4200 0.4200 0.4200
210 0.5750 0.5750 0.5750 0.5750 0.5750 0.5750 0.5750 0.5750
215 0.7550 0.7550 0.7550 0.7550 0.7550 0.7550 0.7550 0.7550
220 0.9250 0.9250 0.9250 0.9250 0.9250 0.9250 0.9250 0.9250
225 1.0850 1.0850 1.0850 1.0850 1.0850 1.0850 1.0850 1.0850
230 1.2250 1.2250 1.2250 1.2250 1.2250 1.2250 1.2250 1.2250
235 1.3500 1.3500 1.3500 1.3500 1.3500 1.3500 1.3500 1.3500
240 1.4650 1.4650 1.4650 1.4650 1.4650 1.4650 1.4650 1.4650
245 1.5550 1.5550 1.5550 1.5550 1.5550 1.5550 1.5550 1.5550
250 1.6350 1.6350 1.6350 1.6350 1.6350 1.6350 1.6350 1.6350
255 1.7000 1.7000 1.7000 1.7000 1.7000 1.7000 1.7000 1.7000
260 1.7500 1.7500 1.7500 1.7500 1.7500 1.7500 1.7500 1.7500
265 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800
270 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000
275 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000 1.8000
280 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800 1.7800
285 1.7350 1.7350 1.7350 1.7350 1.7350 1.7350 1.7350 1.7350
290 1.6650 1.6650 1.6650 1.6650 1.6650 1.6650 1.6650 1.6650
295 1.5750 1.5750 1.5750 1.5750 1.5750 1.5750 1.5750 1.5750
300 1.4700 1.4700 1.4700 1.4700 1.4700 1.4700 1.4700 1.4700
305 1.3450 1.3450 1.3450 1.3450 1.3450 1.3450 1.3450 1.3450
310 1.2150 1.2150 1.2150 1.2150 1.2150 1.2150 1.2150 1.2150
315 1.0750 1.0750 1.0750 1.0750 1.0750 1.0750 1.0750 1.0750
320 0.9200 0.9200 0.9200 0.9200 0.9200 0.9200 0.9200 0.9200
325 0.7450 0.7450 0.7450 0.7450 0.7450 0.7450 0.7450 0.7450
330 0.5700 0.5700 0.5700 0.5700 0.5700 0.5700 0.5700 0.5700
335 0.4050 0.4050 0.4050 0.4050 0.4050 0.4050 0.4050 0.4050
338 0.3290 0.3290 0.3290 0.3290 0.3290 0.3290 0.3290 0.3290
339 0.3055 0.3055 0.3055 0.3055 0.3055 0.3055 0.3055 0.3055
340 0.2820 0.2820 0.2820 0.2820 0.2820 0.2820 0.2820 0.2820
341 0.2600 0.2600 0.2600 0.2600 0.2600 0.2600 0.2600 0.1400
342 0.2380 0.2380 0.2380 0.2380 0.2380 0.2380 0.2380 0.0244
343 0.2170 0.2170 0.2170 0.2170 0.2170 0.1730 0.1200 0.0223
344 0.1960 0.1960 0.1960 0.1960 0.1960 0.1080 0.0240 0.0203
345 0.1770 0.1770 0.1770 0.1450 0.1020 0.0251 0.0218 0.0185
346 0.1580 0.1580 0.1580 0.0940 0.0245 0.0227 0.0197 0.0168
347 0.1405 0.1190 0.0770 0.0259 0.0223 0.0206 0.0179 0.0153
348 0.1230 0.0800 0.0288 0.0235 0.0202 0.0187 0.0163 0.0140
349 0.0925 0.0315 0.0262 0.0213 0.0183 0.0170 0.0148 0.0128
350 0.0620 0.0288 0.0238 0.0194 0.0166 0.0154 0.0134 0.0117
351 0.0327 0.0264 0.0217 0.0176 0.0150 0.0139 0.0122 0.0108
352 0.0303 0.0242 0.0198 0.0159 0.0136 0.0126 0.0111 0.0100
353 0.0282 0.0223 0.0181 0.0145 0.0123 0.0115 0.0101 0.0093
354 0.0263 0.0206 0.0166 0.0132 0.0112 0.0102 0.0093 0.0087
355 0.0247 0.0192 0.0153 0.0121 0.0102 0.0095 0.0087 0.0083
356 0.0235 0.0181 0.0144 0.0112 0.0096 0.0089 0.0084 0.0079
357 0.0225 0.0172 0.0137 0.0107 0.0091 0.0086 0.0080 0.0077
358 0.0219 0.0167 0.0131 0.0104 0.0088 0.0083 0.0078 0.0075
359 0.0215 0.0163 0.0129 0.0102 0.0087 0.0082 0.0077 0.0073
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