Here is an SPF inside a 14' Serpent Express.
Note the front door seam related to the front trailer tire.
(Car center of gravity is ahead of center between trailer tires.)
"...we just got back from the London, Ohio Cobra show. We pulled the trailer and car approx. 1000 miles and averaged about 12.5 mpg with our F-150 4-wheel drive. which isn't too bad considering we usually only get 16 mpg on the highway with the air conditioning on. So it cost us about 3.5 mpg. I am very happy with that mileage. The trailer got a lot of exposure at the show and serveral guys were very interested in the trailer. I wouldn't be suprised if you get a few orders out of it. Overall the trailer is everything that I expected and more. June 28, 2005 James D."