What is the best speed for maximum range?

Please humour my fancy here. lol Me wonders what the sweet spot is for maximum range for the Aptera. Does anyone know? For example, if driving a 250 mile Aptera, is there a speed sweet spot on a smooth highway (and any other conditions) where one may get a much farther reach on one charge? And what might that best-case scenario range be? For example, with a Kandi K27 if one does not employ environmental controls such as air conditioning or heat or engage the "Sport Mode" and instead drive solely in "Eco Mode", with the windows up and at a constant 37.5 miles per hour on a smooth dry road on a pleasant day you can get more than 105 miles of range instead of the 59 mile EPA range. That's 78 percent more range and is very significant, even if it is not realistic for everyday driving. But it is still good to know because, it is good to know what to attempt to do to get the most possible miles if needed. I know this is fantasy for now until I get a response , but, for example, such a 78 percent increase would, in theory, allow a 250 mile Aptera reach up to 445 miles.