Quote>"The McLaren-developed battery pack has a power density of 5.2kW/kg, which is thought to be the best power-to-weight ratio of any automotive high voltage battery system. The batteries constantly self-charge when the Speedtail is driven – there is NO ‘plug-in’ element – however, a wireless charging pad that trickle-charges and maintains the battery’s status when the vehicle is not in use is also included as standard."
At NASA the McLaren Speedtail was reputedly driven to 250MPH over 30 times. 30. Now if the the battery is constantly being recharged whilst it's driven I'd expect the charging at 250MPH to be more than 25MPH. As such and I'll try to reach out to their specialist division for confirmation, but there's NO "proof" of the electric motor power or E motor losing it's power throughout the range to it's electronically controlled speed limitation.
I believe it can power and keep cycling it's battery to enable FULL power to it's outright velocity maximum. Ultimately we've covered alot below but with the right tyres and conditions and place i.e. Ehra-Lessien where McLaren have been allowed before (unlike some "manufacturers") I believe she can go to 290MPH region (270MPH region on internal combustion alone)
Maybe a little more. Can she beat 304.773MPH? I don't believe so.
The secrecy around her aerodynamics numbers particularly co efficiency of drag are a little bit silly. McLaren should release all the information.
Maybe we will see an unlimited version do a productions run at NASA. It's a DAMN shame if this doesn't occur. A start would be an independently measured and instrumented test of current acceleration and limited speed claims.
But Mclaren have sold all of the Speedtail's including the pre prototype's as far as I'm aaware. I can't see an owner wanting to see his or her car pushed to 250MPH+. DAMN it!