Jeffrey Posted November 6, 2012 Share Posted November 6, 2012 and this Quote Link to comment Share on other sites More sharing options...
Skydancer2992 Posted November 6, 2012 Share Posted November 6, 2012 Significant MPG improvement even at a hundred feet. Quote Link to comment Share on other sites More sharing options...
Derek up North Posted November 6, 2012 Share Posted November 6, 2012 But nowhere near 110% @ 150 feet! Quote Link to comment Share on other sites More sharing options...
Totem Posted November 6, 2012 Share Posted November 6, 2012 I'm just as shocked as anyone. I believe Derek is also wrong; it would be 123.5% assuming 22rec 17 MPG standard (which in itself is generous) getting 21 = 1.235 x 17. I posted a picture of the swift truck; i cannot see its mirrors; maybe I was closer (like under 50 feet)? can someone do the math on that picture? Not sure if it was 150 feet Quote Link to comment Share on other sites More sharing options...
Derek up North Posted November 6, 2012 Share Posted November 6, 2012 Yours must be that new fangled 'New Math'. From 10mpg (inbound) -> 21mpg (outbound) = 110%. Your 17 -> 21 math = 23.5%, not 123.5% Quote Link to comment Share on other sites More sharing options...
Totem Posted November 6, 2012 Share Posted November 6, 2012 outbound and inbound are reversed but now I see where you are in your math...but 21 is 1.235 of 17... I am approaching this with the assumption that conditions drafting, wind speed, non drafting etc. will alter the manilla nominal operating MPG (in this case 17) while you are looking at the delta between the two MPGs (10 and 21). Its quite possible that 80-90 westbound across Indiana is all down hill mostly too. Quote Link to comment Share on other sites More sharing options...
straygoose Posted November 6, 2012 Share Posted November 6, 2012 110% improvement in economy by drafting at 150-200ft? My question exactly. All I get at 150-200" is a lot of turbulence buffeting me. If anything, I would think it would reduce gas mileage. Quote Link to comment Share on other sites More sharing options...
straygoose Posted November 6, 2012 Share Posted November 6, 2012 Yeah I am beginning to think this nor Easter wind pattern was opposite of the normal west to east wind pattern. On way home the rig was struggling to keep 61 and never in OD , while on way there was in OD whole time. I clearly cannot see swiftys mirrors in the pic so I probably was 6 car lengths? Unsure anyway mr. Derek, I was so shocked I almost thought I was in a miata! Judging from the car in the pic that was to the left of you, I would say you were more like 4-5 carlengths, somwhere between 60-75'. The pic may be 2D, but it's pretty obvous that's not 150'. What you learned in Drivers Ed about one length per 10mph is true, but only for a normally weighted vehicle with good braking ability, not an overweight beast with inferior braking ability. If I was following as close as that pic suggests, and the semi locked it up and/or jacked at 60 mph, I doubt my Toy would be able to avoid it, what with being blocked on the left by that car. And I just jacked up my bias to full rears too. Too close man. You're playing with fire. It's not worth the 1-2mpg, especially if you have the kids and wife along. Be the turtle. Quote Link to comment Share on other sites More sharing options...
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