Just wanted to find out why my newest neon yellow-green BMW AirShell jacket seemed even cool on 93 degree days while moving in the heat. Skinís wind chill effect Iíll guess (i.e. any wind cooler than your skinís temp will seem cool).
Anyway, too hot to ride so I did a little experiment. I put six motorcycle jackets out onto the hot patio concrete. Ambient temp shows 105 degrees at noon. Wind about 1-2 MPH max. I got some others, but I donít wear them as much so I left them out.
Photo of the jackets tested:
Jackets are (bottom to top, columns 1 and 2):
1. Bright neon Yellow-Green BMW AirShell.
2. Older style BMW Airflow, black and silver.
3. Heavy black leather Harley style jacket.
4. Marsee lightweight mesh silver (almost aluminum color) jacket.
5. BMW ComfortShell (the blue color with gray trim).
6. BMW Santiago (golden orange color) with khaki (sand color) trim.
Left them to sunbath for two hours. Concrete temp. in the sunlight is at 128 degrees.
Reading the temps off them (lightest color area I could find) with a IR temp gun as well as the concrete under them (in their shade) I read the following:
1. Outer shell 132 degrees. Concrete beneath it measures 103 degrees.
2. Outer shell 138 degrees. Concrete beneath it measures 105 degrees.
3. Outer shell 175 degrees. Concrete beneath it measures 106 degrees.
4. Outer shell 129 degrees. Concrete beneath it measures 109 degrees.
5. Outer shell 145 degrees. Concrete beneath it measures 107 degrees.
6. Outer shell 139 degrees. Concrete beneath it measures 106 degrees.
The Marsee mesh silver (#4) had the lowest outer shell temp, however the concrete under it was much hotter than the AirShell (#1). Possibly the open mesh allows some sunlight to get through and bake the concrete? Concrete under that open mesh Marsee was the hottest of all too which seems to defeat the idea of open mesh in the summer.
Iím sort of puzzled as to why the concrete under the blue BMW ComfortShell (#5) was higher than the Harley leather (#3) Ė by only 1 degree though. Heavier and more insulation maybe? I know the BMW ComfortShell can feel like a sauna at times much like the Aerostitch Gore-Tex suit or my Gerbing's Cascades Extreme 4-season (it's not!). It does not flow that much air and I wish it had more vents, but it's mission was more of a one-piece including rain gear.
The bright neon yellow BMW AirShell green feels much cooler
to me riding than the others. I suspect it is that color as well as whatever they use for the mesh isn't as open to allow sunlight through like the Marsee open mesh jersey-style jacket. Sort of validates my "Riding with it seems cooler
Draw your own conclusions. My