That should be easy....just use a silver can motor. Back in our endurance F1 days we could go 35min on a 3000ish mah NiMh battery. 23.726km = 14.74mile...so all it needs to do is go for an hour at 15mph and it is beat. A F1 with a silver can is quite a bit faster than 15mph and with the high capacity batteries of today that are much lighter than the 3000mah NiMh batteries...that should be a walk in the park.