Mailing List lml@lancaironline.net Message #42041
From: <Sky2high@aol.com>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Re: IO-550 fuel injection, Possible Fuel Vent Clogging Problem
Date: Fri, 11 May 2007 17:16:23 -0400
To: <lml@lancaironline.net>
In a message dated 5/11/2007 10:33:00 A.M. Central Daylight Time, MikeEasley@aol.com writes:
This may seem like a crazy idea, but what about attaching the pitot tube line to the NACA vent line and doing a test flight without the airspeed indicator.  There must be a way to convert the airspeed indication to PSI to determine how much pressure the NACA is generating.  In my ES the pitot line runs through the left wingtip.
Mike,
 
 

 

 

Pressure in Units

IAS mph

Knots

 "H2O

"Hg

PSI

 

 

 

 

 

40

34.8

0.79

0.06

0.028

50

43.4

1.23

0.09

0.044

60

52.1

1.77

0.13

0.064

70

60.8

2.41

0.18

0.087

80

69.5

3.15

0.23

0.114

90

78.2

4.00

0.29

0.144

100

86.9

4.94

0.36

0.178

110

95.6

5.98

0.44

0.216

120

104.3

7.12

0.52

0.257

130

113.0

8.37

0.62

0.302

140

121.7

9.72

0.71

0.351

150

130.3

11.17

0.82

0.403

160

139.0

12.72

0.94

0.460

170

147.7

14.39

1.06

0.520

180

156.4

16.15

1.19

0.583

190

165.1

18.03

1.33

0.651

200

173.8

20.01

1.47

0.722

210

182.5

22.10

1.62

0.798

220

191.2

24.29

1.79

0.877

230

199.9

26.60

1.96

0.961

240

208.6

29.03

2.13

1.048

250

217.2

31.56

2.32

1.140

260

225.9

34.21

2.52

1.236

270

234.6

36.98

2.72

1.335

280

243.3

39.86

2.93

1.440

290

252.0

42.87

3.15

1.548

300

260.7

45.99

3.38

1.661

 
Scott Krueger AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

Darwinian culling phrase: Watch This!
 
PS Speadsheet attached




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