Paul, Johannes, Chris, et al,
Here's what started the whole cooling quest for me -
An article entitled Engine Cooling Problems (September 1996 Sport Aviation)
and written by Jimmy Tubbs at ECI (attached as jpeg images, 2 pages). It
is worth reading. Note references to Lycoming delta-P for 320's and
360's. Note the careful placement of probes.
I have included a more detailed table than that in the article.
|
Cowl |
Cowl |
Delta |
Delta |
Delta |
|
IAS
mph |
Knots |
"H2O |
"Hg |
PSI |
|
|
|
|
|
|
|
40 |
34.8 |
0.79 |
0.06 |
0.028 |
|
45 |
39.1 |
1.00 |
0.07 |
0.036 |
|
50 |
43.4 |
1.23 |
0.09 |
0.044 |
|
55 |
47.8 |
1.49 |
0.11 |
0.054 |
|
60 |
52.1 |
1.77 |
0.13 |
0.064 |
|
65 |
56.5 |
2.08 |
0.15 |
0.075 |
|
70 |
60.8 |
2.41 |
0.18 |
0.087 |
|
75 |
65.2 |
2.77 |
0.20 |
0.100 |
|
80 |
69.5 |
3.15 |
0.23 |
0.114 |
|
85 |
73.9 |
3.56 |
0.26 |
0.129 |
|
90 |
78.2 |
4.00 |
0.29 |
0.144 |
|
95 |
82.6 |
4.45 |
0.33 |
0.161 |
|
100 |
86.9 |
4.94 |
0.36 |
0.178 |
|
105 |
91.2 |
5.45 |
0.40 |
0.197 |
|
110 |
95.6 |
5.98 |
0.44 |
0.216 |
|
115 |
99.9 |
6.54 |
0.48 |
0.236 |
|
120 |
104.3 |
7.12 |
0.52 |
0.257 |
|
125 |
108.6 |
7.73 |
0.57 |
0.279 |
|
130 |
113.0 |
8.37 |
0.62 |
0.302 |
|
135 |
117.3 |
9.03 |
0.66 |
0.326 |
|
140 |
121.7 |
9.72 |
0.71 |
0.351 |
|
145 |
126.0 |
10.43 |
0.77 |
0.377 |
|
150 |
130.3 |
11.17 |
0.82 |
0.403 |
|
155 |
134.7 |
11.93 |
0.88 |
0.431 |
|
160 |
139.0 |
12.72 |
0.94 |
0.460 |
|
165 |
143.4 |
13.54 |
1.00 |
0.489 |
|
170 |
147.7 |
14.39 |
1.06 |
0.520 |
|
175 |
152.1 |
15.26 |
1.12 |
0.551 |
|
180 |
156.4 |
16.15 |
1.19 |
0.583 |
|
185 |
160.8 |
17.08 |
1.26 |
0.617 |
|
190 |
165.1 |
18.03 |
1.33 |
0.651 |
|
195 |
169.5 |
19.00 |
1.40 |
0.686 |
|
200 |
173.8 |
20.01 |
1.47 |
0.722 |
|
205 |
178.1 |
21.04 |
1.55 |
0.760 |
|
210 |
182.5 |
22.10 |
1.62 |
0.798 |
|
215 |
186.8 |
23.18 |
1.70 |
0.837 |
|
220 |
191.2 |
24.29 |
1.79 |
0.877 |
|
225 |
195.5 |
25.44 |
1.87 |
0.919 |
|
230 |
199.9 |
26.60 |
1.96 |
0.961 |
Scott Krueger
AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL
(KARR)