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Ptero · 10-20-2008, 01:23 PM

Yes, I was quite fortunate that the wind vector had an easterly component. Here is the wind data for Laramie, Rock Springs and Salt Lake City for that day. If anyone is wondering how much impact aerodynamics has on mileage, this is food for thought because I actually lifetime average in the low 50 mpg range but this tank gave me 65.5!

Below, the wind speed is to the left of the direction:

Weather Conditions for KLAR (Laramie WY)
Tabular Listing: July 25, 2008 - 8:00 through July 26, 2008 - 09:00 MDT Time(MDT) Temperature Dew Relative Wind Wind Wind Quality Pressure Sea level Altimeter Weather Visibility Precipitation Precipitation Precipitation Ceiling
Point Humidity Speed Gust Direction check pressure conditions 1hr 6hr 24hr
° F ° F % mph mph in in in miles in in in feet
8:53 66.0 51.1 59 8 S OK 23.15 30.00 30.32 clear 10.00
7:53 60.1 51.1 72 8 S OK 23.15 29.99 30.32 clear 10.00
6:53 55.9 52.0 87 14 S OK 23.15 29.99 30.32 clear 10.00
5:53 55.0 52.0 89 14 S OK 23.15 29.99 30.32 clear 10.00 0.01
4:53 55.9 53.1 90 20 SSE OK 23.15 29.97 30.32 clear 10.00
3:53 57.0 53.1 87 18 SSE OK 23.16 29.98 30.33 clear 10.00
2:53 57.0 53.1 87 18 SSE OK 23.16 30.00 30.33 clear 10.00
1:53 57.0 52.0 83 17 SSE OK 23.16 29.97 30.33 clear 10.00
0:53 57.0 52.0 83 14 S OK 23.16 29.97 30.33 clear 10.00
23:53 57.0 50.0 77 14 S OK 23.17 30.00 30.35 clear 10.00 0.00
22:53 57.9 51.1 78 13 S OK 23.17 30.01 30.35 clear 10.00
21:53 62.1 51.1 67 14 ESE OK 23.17 30.01 30.35 clear 10.00
20:53 62.1 53.1 72 14 E OK 23.16 30.01 30.34 mostly clear 10.00 0.00
20:39 62.6 53.6 72 13 21 ENE OK 23.16 30.34 mostly clear 10.00 0.00
19:55 69.8 46.4 43 15 30 W OK 23.15 30.32 mostly cloudy 10.00 0.00 7500
19:53 72.0 46.9 41 17 30 W OK 23.14 29.98 30.31 lt rain 10.00 0.00 8000
18:53 75.9 46.0 35 30 43 S OK 23.11 29.94 30.27 mostly clear 10.00 0.00
17:53 77.0 48.0 36 29 36 S OK 23.12 29.97 30.29 lt rain 10.00 0.00
16:53 80.1 51.1 37 26 35 SE OK 23.12 29.95 30.29 clear 10.00
15:53 79.0 46.0 31 28 33 SE OK 23.14 29.98 30.31 clear 10.00
15:12 78.8 51.8 39 21 28 SE OK 23.15 30.32 clear 10.00
14:53 73.9 54.0 50 22 31 ESE OK 23.16 30.02 30.33 clear 10.00 0.01
14:43 75.2 55.4 50 24 35 SE OK 23.16 30.33 mostly clear 10.00 0.01
14:40 75.2 55.4 50 25 38 SSE OK 23.16 30.33 lt rain 10.00 0.01
14:01 78.8 48.2 34 6 SE OK 23.14 30.31 mostly clear 10.00
13:53 81.0 37.9 22 0 OK 23.14 29.95 30.31 clear 10.00
12:53 82.0 39.9 22 0 OK 23.15 29.95 30.32 clear 10.00
11:53 81.0 42.1 25 9 E OK 23.16 29.96 30.33 clear 10.00
10:53 78.1 42.1 28 8 NNE OK 23.16 29.98 30.34 clear 10.00
9:53 72.0 43.0 35 5 NNW OK 23.16 30.01 30.34 mostly clear 10.00
8:53 66.9 45.0 45 0 OK 23.16 30.01 30.34 clear 10.00
MESOWEST STATION INTERFACE

Weather Conditions for KRKS (Rock Springs)
Tabular Listing: July 25, 2008 - 8:00 through July 26, 2008 - 09:00 MDT Time(MDT) Temperature Dew Relative Wind Wind Wind Quality Pressure Sea level Altimeter Weather Visibility
Point Humidity Speed Gust Direction check pressure conditions
° F ° F % mph mph in in in miles
8:54 69.1 43.0 39 3 OK 23.57 29.99 30.27 clear 10.00
7:54 64.9 39.9 40 3 NNE OK 23.56 29.97 30.26 clear 10.00
6:54 61.0 39.0 44 3 ENE OK 23.55 29.97 30.25 clear 10.00
5:54 60.1 37.9 44 3 ENE OK 23.55 29.96 30.24 clear 10.00
4:54 62.1 37.9 41 5 ENE OK 23.54 29.95 30.23 clear 10.00
3:54 62.1 37.0 39 3 E OK 23.54 29.93 30.23 clear 10.00
2:54 64.0 37.0 37 0 OK 23.54 29.93 30.23 clear 10.00
1:54 66.0 37.9 36 8 S OK 23.54 29.93 30.23 clear 10.00
0:54 69.1 36.0 30 6 SSE OK 23.54 29.93 30.23 clear 10.00
23:54 70.0 36.0 29 6 SSE OK 23.55 29.93 30.24 clear 10.00
22:54 71.1 37.0 29 6 ESE OK 23.54 29.93 30.23 clear 10.00
21:54 72.0 37.0 28 9 SW OK 23.53 29.93 30.22 clear 10.00
20:54 75.0 36.0 24 10 SW OK 23.51 29.92 30.20 clear 10.00
19:54 81.0 36.0 20 13 SSW OK 23.51 29.91 30.19 clear 10.00
18:54 84.0 35.1 17 18 S OK 23.51 29.92 30.19 clear 10.00
17:54 81.0 35.1 19 22 31 S OK 23.51 29.93 30.19 clear 10.00
16:54 82.9 35.1 18 22 S OK 23.52 29.93 30.21 clear 10.00
15:54 89.1 33.1 14 17 S OK 23.53 29.92 30.22 clear 10.00
14:54 84.9 35.1 17 24 SSE OK 23.54 29.94 30.23 clear 10.00
13:54 86.0 37.0 18 20 25 SE OK 23.55 29.94 30.24 mostly clear 10.00
13:30 84.2 33.8 16 5 16 OK 23.55 30.25 thunder 10.00
12:54 84.9 37.0 18 5 OK 23.56 29.96 30.26 clear 10.00
11:54 84.0 41.0 22 9 18 SE OK 23.58 29.98 30.28 clear 10.00
10:54 78.1 43.0 29 8 E OK 23.58 30.00 30.29 clear 10.00
9:54 73.9 45.0 36 13 ENE OK 23.59 30.01 30.30 clear 10.00
8:54 69.1 48.0 47 8 ENE OK 23.60 30.03 30.31 clear 10.00

http://raws.wrh.noaa.gov/cgi-bin/rom...LOCAL&stn=KRKS

Weather Conditions for KSLC (Salt Lake City, UT)
Tabular Listing: July 25, 2008 - 8:00 through July 26, 2008 - 09:00 MDT Time(MDT) Temperature Dew Relative Wind Wind Wind Quality Pressure Sea level Altimeter Weather Visibility Ceiling
Point Humidity Speed Gust Direction check pressure conditions
° F ° F % mph mph in in in miles feet
8:53 84.0 50.0 31 12 SSE OK 25.71 29.83 30.02 partly cloudy 10.00
7:53 81.0 48.9 33 9 S OK 25.70 29.80 30.01 partly cloudy 10.00
6:53 79.0 46.9 32 16 SSE OK 25.69 29.79 30.00 mostly clear 10.00
5:53 79.0 46.9 32 13 SSE OK 25.67 29.77 29.98 partly cloudy 10.00
4:53 79.0 48.0 34 13 S OK 25.67 29.77 29.98 mostly clear 10.00
3:53 80.1 48.0 33 13 SSE OK 25.67 29.76 29.97 partly cloudy 10.00
2:53 82.0 46.9 29 6 SSE OK 25.67 29.76 29.98 partly cloudy 10.00
1:53 82.0 44.1 26 10 SSE OK 25.66 29.75 29.96 mostly clear 10.00
0:53 80.1 42.1 26 7 SE OK 25.66 29.75 29.96 mostly clear 10.00
23:53 81.0 42.1 25 9 SSE OK 25.66 29.75 29.96 mostly clear 10.00
22:53 84.0 42.1 23 9 SSE OK 25.66 29.75 29.96 mostly clear 10.00
21:53 84.9 41.0 21 9 SSE OK 25.65 29.75 29.95 partly cloudy 10.00
20:53 84.9 43.0 23 7 NNE OK 25.63 29.74 29.93 partly cloudy 10.00
19:53 96.1 34.0 11 9 N OK 25.63 29.72 29.93 partly cloudy 10.00
18:53 99.0 30.9 9 12 NNE OK 25.63 29.72 29.93 partly cloudy 10.00
17:53 100.9 32.0 9 12 N OK 25.64 29.73 29.94 partly cloudy 10.00
16:53 100.9 33.1 10 8 NNW OK 25.66 29.75 29.96 mostly clear 10.00
15:53 100.9 33.1 10 13 18 NNW OK 25.67 29.77 29.97 mostly clear 10.00
14:53 99.0 32.0 10 3 OK 25.68 29.79 29.99 partly cloudy 10.00
13:53 99.0 28.9 9 6 20 ESE OK 25.70 29.81 30.01 partly cloudy 10.00
12:53 96.1 30.9 10 13 16 S OK 25.72 29.83 30.03 partly cloudy 10.00
11:53 93.9 37.0 14 14 S OK 25.73 29.84 30.04 partly cloudy 10.00
10:53 91.9 39.9 16 15 SSE OK 25.73 29.85 30.04 partly cloudy 10.00
9:53 84.9 41.0 21 10 SE OK 25.73 29.85 30.05 mostly cloudy 10.00 13000
8:53 82.0 39.9 22 10 SE OK 25.72 29.85 30.03 mostly cloudy 10.00 13000

http://raws.wrh.noaa.gov/cgi-bin/rom...LOCAL&stn=KSLC

Any hypermilers who want to examine trip performance vs. wind direction can find this wonderful tool here:
http://www.wxusa.com/wx1/wx.php?conf...C+UT&Submit=GO

I don't use a tach or Scangauge. My most valuable instrument is a $4 garden pot bird with spring-loaded wings that I mounted to my cowling with the wings straight into the airflow. The faster you go, the more the wings fold up. You get good mileage when they are out, lousy mileage when they are up. If there is a cross wind, the upwind wing will point up and the downwind wing will lay straight out. If you want to draft someone, they start flapping in the wake turbulence. If you draw up real close, the wings open - even at 70 mph!

I'm not kidding when I say that if you offered me a tach, Scangauge or the bird, I'd take the bird without hesitation.

Follow this link to see the bird in a news video
http://www.bakersfield.com/hourly_ne...ry/487709.html

10-20-2008, 01:23 PM	#9 (permalink)
Ptero Hydrogen Nut Join Date: Oct 2008 Location: California Posts: 152 Smart Car ForTwo Pure - '08 Smart Fortwo Pure stripped 90 day: 51.35 mpg (US) BMW 750iL V12 - '90 BMW V12 90 day: 26.4 mpg (US) Wildfire 250C - '08 Shandong Pioneer 250C Thanks: 2 Thanked 33 Times in 22 Posts	Yes, I was quite fortunate that the wind vector had an easterly component. Here is the wind data for Laramie, Rock Springs and Salt Lake City for that day. If anyone is wondering how much impact aerodynamics has on mileage, this is food for thought because I actually lifetime average in the low 50 mpg range but this tank gave me 65.5! Below, the wind speed is to the left of the direction: Weather Conditions for KLAR (Laramie WY) Tabular Listing: July 25, 2008 - 8:00 through July 26, 2008 - 09:00 MDT Time(MDT) Temperature Dew Relative Wind Wind Wind Quality Pressure Sea level Altimeter Weather Visibility Precipitation Precipitation Precipitation Ceiling Point Humidity Speed Gust Direction check pressure conditions 1hr 6hr 24hr ° F ° F % mph mph in in in miles in in in feet 8:53 66.0 51.1 59 8 S OK 23.15 30.00 30.32 clear 10.00 7:53 60.1 51.1 72 8 S OK 23.15 29.99 30.32 clear 10.00 6:53 55.9 52.0 87 14 S OK 23.15 29.99 30.32 clear 10.00 5:53 55.0 52.0 89 14 S OK 23.15 29.99 30.32 clear 10.00 0.01 4:53 55.9 53.1 90 20 SSE OK 23.15 29.97 30.32 clear 10.00 3:53 57.0 53.1 87 18 SSE OK 23.16 29.98 30.33 clear 10.00 2:53 57.0 53.1 87 18 SSE OK 23.16 30.00 30.33 clear 10.00 1:53 57.0 52.0 83 17 SSE OK 23.16 29.97 30.33 clear 10.00 0:53 57.0 52.0 83 14 S OK 23.16 29.97 30.33 clear 10.00 23:53 57.0 50.0 77 14 S OK 23.17 30.00 30.35 clear 10.00 0.00 22:53 57.9 51.1 78 13 S OK 23.17 30.01 30.35 clear 10.00 21:53 62.1 51.1 67 14 ESE OK 23.17 30.01 30.35 clear 10.00 20:53 62.1 53.1 72 14 E OK 23.16 30.01 30.34 mostly clear 10.00 0.00 20:39 62.6 53.6 72 13 21 ENE OK 23.16 30.34 mostly clear 10.00 0.00 19:55 69.8 46.4 43 15 30 W OK 23.15 30.32 mostly cloudy 10.00 0.00 7500 19:53 72.0 46.9 41 17 30 W OK 23.14 29.98 30.31 lt rain 10.00 0.00 8000 18:53 75.9 46.0 35 30 43 S OK 23.11 29.94 30.27 mostly clear 10.00 0.00 17:53 77.0 48.0 36 29 36 S OK 23.12 29.97 30.29 lt rain 10.00 0.00 16:53 80.1 51.1 37 26 35 SE OK 23.12 29.95 30.29 clear 10.00 15:53 79.0 46.0 31 28 33 SE OK 23.14 29.98 30.31 clear 10.00 15:12 78.8 51.8 39 21 28 SE OK 23.15 30.32 clear 10.00 14:53 73.9 54.0 50 22 31 ESE OK 23.16 30.02 30.33 clear 10.00 0.01 14:43 75.2 55.4 50 24 35 SE OK 23.16 30.33 mostly clear 10.00 0.01 14:40 75.2 55.4 50 25 38 SSE OK 23.16 30.33 lt rain 10.00 0.01 14:01 78.8 48.2 34 6 SE OK 23.14 30.31 mostly clear 10.00 13:53 81.0 37.9 22 0 OK 23.14 29.95 30.31 clear 10.00 12:53 82.0 39.9 22 0 OK 23.15 29.95 30.32 clear 10.00 11:53 81.0 42.1 25 9 E OK 23.16 29.96 30.33 clear 10.00 10:53 78.1 42.1 28 8 NNE OK 23.16 29.98 30.34 clear 10.00 9:53 72.0 43.0 35 5 NNW OK 23.16 30.01 30.34 mostly clear 10.00 8:53 66.9 45.0 45 0 OK 23.16 30.01 30.34 clear 10.00 MESOWEST STATION INTERFACE Weather Conditions for KRKS (Rock Springs) Tabular Listing: July 25, 2008 - 8:00 through July 26, 2008 - 09:00 MDT Time(MDT) Temperature Dew Relative Wind Wind Wind Quality Pressure Sea level Altimeter Weather Visibility Point Humidity Speed Gust Direction check pressure conditions ° F ° F % mph mph in in in miles 8:54 69.1 43.0 39 3 OK 23.57 29.99 30.27 clear 10.00 7:54 64.9 39.9 40 3 NNE OK 23.56 29.97 30.26 clear 10.00 6:54 61.0 39.0 44 3 ENE OK 23.55 29.97 30.25 clear 10.00 5:54 60.1 37.9 44 3 ENE OK 23.55 29.96 30.24 clear 10.00 4:54 62.1 37.9 41 5 ENE OK 23.54 29.95 30.23 clear 10.00 3:54 62.1 37.0 39 3 E OK 23.54 29.93 30.23 clear 10.00 2:54 64.0 37.0 37 0 OK 23.54 29.93 30.23 clear 10.00 1:54 66.0 37.9 36 8 S OK 23.54 29.93 30.23 clear 10.00 0:54 69.1 36.0 30 6 SSE OK 23.54 29.93 30.23 clear 10.00 23:54 70.0 36.0 29 6 SSE OK 23.55 29.93 30.24 clear 10.00 22:54 71.1 37.0 29 6 ESE OK 23.54 29.93 30.23 clear 10.00 21:54 72.0 37.0 28 9 SW OK 23.53 29.93 30.22 clear 10.00 20:54 75.0 36.0 24 10 SW OK 23.51 29.92 30.20 clear 10.00 19:54 81.0 36.0 20 13 SSW OK 23.51 29.91 30.19 clear 10.00 18:54 84.0 35.1 17 18 S OK 23.51 29.92 30.19 clear 10.00 17:54 81.0 35.1 19 22 31 S OK 23.51 29.93 30.19 clear 10.00 16:54 82.9 35.1 18 22 S OK 23.52 29.93 30.21 clear 10.00 15:54 89.1 33.1 14 17 S OK 23.53 29.92 30.22 clear 10.00 14:54 84.9 35.1 17 24 SSE OK 23.54 29.94 30.23 clear 10.00 13:54 86.0 37.0 18 20 25 SE OK 23.55 29.94 30.24 mostly clear 10.00 13:30 84.2 33.8 16 5 16 OK 23.55 30.25 thunder 10.00 12:54 84.9 37.0 18 5 OK 23.56 29.96 30.26 clear 10.00 11:54 84.0 41.0 22 9 18 SE OK 23.58 29.98 30.28 clear 10.00 10:54 78.1 43.0 29 8 E OK 23.58 30.00 30.29 clear 10.00 9:54 73.9 45.0 36 13 ENE OK 23.59 30.01 30.30 clear 10.00 8:54 69.1 48.0 47 8 ENE OK 23.60 30.03 30.31 clear 10.00 http://raws.wrh.noaa.gov/cgi-bin/rom...LOCAL&stn=KRKS Weather Conditions for KSLC (Salt Lake City, UT) Tabular Listing: July 25, 2008 - 8:00 through July 26, 2008 - 09:00 MDT Time(MDT) Temperature Dew Relative Wind Wind Wind Quality Pressure Sea level Altimeter Weather Visibility Ceiling Point Humidity Speed Gust Direction check pressure conditions ° F ° F % mph mph in in in miles feet 8:53 84.0 50.0 31 12 SSE OK 25.71 29.83 30.02 partly cloudy 10.00 7:53 81.0 48.9 33 9 S OK 25.70 29.80 30.01 partly cloudy 10.00 6:53 79.0 46.9 32 16 SSE OK 25.69 29.79 30.00 mostly clear 10.00 5:53 79.0 46.9 32 13 SSE OK 25.67 29.77 29.98 partly cloudy 10.00 4:53 79.0 48.0 34 13 S OK 25.67 29.77 29.98 mostly clear 10.00 3:53 80.1 48.0 33 13 SSE OK 25.67 29.76 29.97 partly cloudy 10.00 2:53 82.0 46.9 29 6 SSE OK 25.67 29.76 29.98 partly cloudy 10.00 1:53 82.0 44.1 26 10 SSE OK 25.66 29.75 29.96 mostly clear 10.00 0:53 80.1 42.1 26 7 SE OK 25.66 29.75 29.96 mostly clear 10.00 23:53 81.0 42.1 25 9 SSE OK 25.66 29.75 29.96 mostly clear 10.00 22:53 84.0 42.1 23 9 SSE OK 25.66 29.75 29.96 mostly clear 10.00 21:53 84.9 41.0 21 9 SSE OK 25.65 29.75 29.95 partly cloudy 10.00 20:53 84.9 43.0 23 7 NNE OK 25.63 29.74 29.93 partly cloudy 10.00 19:53 96.1 34.0 11 9 N OK 25.63 29.72 29.93 partly cloudy 10.00 18:53 99.0 30.9 9 12 NNE OK 25.63 29.72 29.93 partly cloudy 10.00 17:53 100.9 32.0 9 12 N OK 25.64 29.73 29.94 partly cloudy 10.00 16:53 100.9 33.1 10 8 NNW OK 25.66 29.75 29.96 mostly clear 10.00 15:53 100.9 33.1 10 13 18 NNW OK 25.67 29.77 29.97 mostly clear 10.00 14:53 99.0 32.0 10 3 OK 25.68 29.79 29.99 partly cloudy 10.00 13:53 99.0 28.9 9 6 20 ESE OK 25.70 29.81 30.01 partly cloudy 10.00 12:53 96.1 30.9 10 13 16 S OK 25.72 29.83 30.03 partly cloudy 10.00 11:53 93.9 37.0 14 14 S OK 25.73 29.84 30.04 partly cloudy 10.00 10:53 91.9 39.9 16 15 SSE OK 25.73 29.85 30.04 partly cloudy 10.00 9:53 84.9 41.0 21 10 SE OK 25.73 29.85 30.05 mostly cloudy 10.00 13000 8:53 82.0 39.9 22 10 SE OK 25.72 29.85 30.03 mostly cloudy 10.00 13000 http://raws.wrh.noaa.gov/cgi-bin/rom...LOCAL&stn=KSLC Any hypermilers who want to examine trip performance vs. wind direction can find this wonderful tool here: http://www.wxusa.com/wx1/wx.php?conf...C+UT&Submit=GO I don't use a tach or Scangauge. My most valuable instrument is a $4 garden pot bird with spring-loaded wings that I mounted to my cowling with the wings straight into the airflow. The faster you go, the more the wings fold up. You get good mileage when they are out, lousy mileage when they are up. If there is a cross wind, the upwind wing will point up and the downwind wing will lay straight out. If you want to draft someone, they start flapping in the wake turbulence. If you draw up real close, the wings open - even at 70 mph! I'm not kidding when I say that if you offered me a tach, Scangauge or the bird, I'd take the bird without hesitation. Follow this link to see the bird in a news video http://www.bakersfield.com/hourly_ne...ry/487709.html __________________ Ptero Last edited by Ptero; 10-20-2008 at 02:10 PM..