How does rain affect mileage?

Dngrsone · 02-25-2008, 10:42 PM

Curious because my mileage sucked quite a bit the other day when driving in the rain.

I realize that differences in traffic patterns might have some effect, and the temperature had some bearing on the issue (~47°F as I recall), but the mileage seemed worse than driving on days with the same approximate temperature but no rain.

bwilson4web · 02-26-2008, 12:02 AM

Rolling drag increases due to pushing aside the road water. There is a loss of momentum from rain that is accelerated to vehicle speed and drops off. The formerly smooth surface is now covered with less smooth water ripples, drops and imperfections. That is just the short list.

Bob Wilson

dogfriend · 02-26-2008, 01:34 AM

How about Rain

darelldd · 02-26-2008, 01:49 AM

It can cost me as much as 50 W-hr per mile. Watts that I'm happy to spend to not have to ride my bike in the rain.

landstander · 02-26-2008, 08:20 AM

Quote:

Originally Posted by darelldd

It can cost me as much as 50 W-hr per mile. Watts that I'm happy to spend to not have to ride my bike in the rain.

Yeah, but riding during a heavy rain is huge fun (seriously!), at least during the summer.

It does make one appreciate a good waterproof pannier, however... especially when transporting a notebook to/from work.

finman · 02-26-2008, 09:43 AM

Quote:

Originally Posted by dogfriend

How about Rain

Holy crap!! Had no idea, thanks for the link dogfriend.

Explains my 37 MPG the past tank and current one. Have had lots of rain/wet roads, even the ugly freezing rain! Add snow and below freezing temps and (relatively) short, hilly 15 minute commutes. Plus winter grip tires.

Even with an EBH. I know it's working, as the engine shuts off soon after the one minute 'warm-up' in the AM. But MPG is not any better, due to the weather and my terrain/time on the road (30 MPH to 40 MPH speeds).

omgitsroy326 · 02-26-2008, 09:49 AM

Quote:

Originally Posted by dogfriend

How about Rain

is that a real palm program??? can i download it?

raindrop has a mass... and it has an acceleration

F= ma... now you have lots of little m and a.. but there are a lot going towards your car.. as you increase your speed ... you're increasing the rain's reaction...

dogfriend · 02-26-2008, 10:06 AM

It appears to be a real Palm program, but I don't know if you can download it or not. I found it on Hobbit's link page; Hobbit attributes the page to Wayne Brown.

Prius Palm Mileage Simulator

JimboK · 02-26-2008, 10:10 AM

Quote:

Originally Posted by omgitsroy326

is that a real palm program??? can i download it?

I have the (downloaded) application, but it currently is unavailable. After noticing the download links were missing from the site recently, I e-mailed Wayne to ask about them. He thinks the registration code was hacked into, and he took them down until he could figure it out. Meanwhile, he's pretty busy with stuff that, in his words, actually pays, so he doesn't know when they will be available again.

omgitsroy326 · 02-26-2008, 10:24 AM

Quote:

Originally Posted by JimboK

I have the (downloaded) application, but it currently is unavailable. After noticing the download links were missing from the site recently, I e-mailed Wayne to ask about them. He thinks the registration code was hacked into, and he took them down until he could figure it out. Meanwhile, he's pretty busy with stuff that, in his words, actually pays, so he doesn't know when they will be available again.

can i get a copy???

02-25-2008, 10:42 PM	#1
Dngrsone You really think so. Join Date: Jan 2008 Location: Centrally located far from everywhere Posts: 154 My Car: 2008 Prius Model: Package: Base Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	How does rain affect mileage? Curious because my mileage sucked quite a bit the other day when driving in the rain. I realize that differences in traffic patterns might have some effect, and the temperature had some bearing on the issue (~47°F as I recall), but the mileage seemed worse than driving on days with the same approximate temperature but no rain.

02-26-2008, 12:02 AM	#2
bwilson4web 03 and 10 Prius Join Date: Nov 2005 Location: Huntsville AL with 2003 Prius Posts: 3,758 My Car: 2010 Prius Model: III Package: #1 Thanks: 138 Thanked 340 Times in 187 Posts Friends: 19	Re: How does rain affect mileage? Rolling drag increases due to pushing aside the road water. There is a loss of momentum from rain that is accelerated to vehicle speed and drops off. The formerly smooth surface is now covered with less smooth water ripples, drops and imperfections. That is just the short list. Bob Wilson

02-26-2008, 01:34 AM	#3
dogfriend Human - Animal Hybrid Join Date: Feb 2007 Location: Carmichael, CA Posts: 4,811 My Car: 2007 Prius Model: Package: #6 Thanks: 236 Thanked 149 Times in 125 Posts Friends: 10	Re: How does rain affect mileage? How about Rain

02-26-2008, 01:49 AM	#4
darelldd Prius is our Gas Guzzler Join Date: Jan 2006 Location: Northern CA Posts: 5,334 My Car: 2006 Prius Model: Package: #6 Thanks: 18 Thanked 44 Times in 32 Posts Friends: 12	Re: How does rain affect mileage? It can cost me as much as 50 W-hr per mile. Watts that I'm happy to spend to not have to ride my bike in the rain.

02-26-2008, 10:06 AM	#8
dogfriend Human - Animal Hybrid Join Date: Feb 2007 Location: Carmichael, CA Posts: 4,811 My Car: 2007 Prius Model: Package: #6 Thanks: 236 Thanked 149 Times in 125 Posts Friends: 10	Re: How does rain affect mileage? It appears to be a real Palm program, but I don't know if you can download it or not. I found it on Hobbit's link page; Hobbit attributes the page to Wayne Brown. Prius Palm Mileage Simulator