I just returned from Eureka Springs today, and used the 4 lanes and 80 mph when legal to do so, at 65 mph most of the way once out of the Arkansas twisties for the first 25 miles or so.
I was pulling my trailer, which is a square wooden box, and the windshield is an Optic Armor +4 and it pushes a lot of air in front of you.... that is evidenced by being almost impossible to hold your arm up straight above it at 80 mph....you have to push like hell to hold your arm in place.
On this one trip, which BTW was Pure Gas which I bought just for grins..... was the worst MPG that I have recorded this summer. That will be the last time I waste any money on Pure Gas for my 1800, it just does not compute with the wallet.
Result? 28.68 mpg as recorded by Fuelio
The trip going to Eureka Springs was on the rural roads and speeds of 55 usually and sometimes 60 or 65 in a few places. That one tank of gas returned 35.37 mpg.
I made it a point to always fill the tank to the very tip top of the filler neck, this takes a lot of little niggling clicks to do so, but it produces the most accurate fillup measurement.... ( disregarding different pumps and their readings )
Here is a list of this summer's tank reports:
28.68 pulling trailer at max speed possible
33.75 running twisties around ES.
35.37 w/ trailer going to ES
29.4 w/trailer going to ES
29.55 no trailer, just messing around locally, lots of 4 lanes
32.81 no trailer, just messing around locally, lots of 4 lanes
and that is all I have ridden the bike this year.
I pretty much agree with galaxyhunter
, and I have commented on this several times, it is how fast you run, and how big is the sheet of plywood in front of you that we call a "windshield"
for a different reason, I am going to have to trim down, or change my windshield, the +4 version is about 6 inches too tall to go inside my Toy Hauler's garage... so changes are coming....