[NRS91]

For drive decoupling the LT230 does have a neutral position if i need to push the Landy - it'll no doubt be impossible to select if the motor is ever out of control, where i will rely on the brakes to overcome the motor and stop me - i have disk brakes which are pretty powerful! I've also got a posh little e-stop button which i'm definitely going to put somewhere on the dash!
Failing that i'll die. c'est la vie.

I guess in that situation you would rely on being able to turn off the main contactors and kill the high voltage side?

 

[NRS91]

For those casual spectators of EV conversions what rpm does the Hyper9 rev to?
The cruising RPM of my Disco 2 is around 2700rpm in overdrive top so would need around 3800rpm to match it. I have seen some EV conversions running a 2.8:1 planetary reduction which helps turn the 12,000rpm into greater peak torque delivered more often than a ICE can manage.

The JerryRigEverything Hummer EV conversion runs this set up into an Atlas transfer case.

 

[NRS91]

The Hyper9 has a max of 8000RPM, and the Hyper 9 HV which i've got has a max of 9000 according to EV Europe. This is 133mph in my case, not including wind drag and exploding propshafts of course. It's not the going fast that's difficult, it's stopping (in the rain etc). I'll probably speed limit it in the software to some sensible number.

I tend to do about 65mph on the motorway when cruising, which is 4402 RPM. This may be a bit lower in the future to extend my range.

I've watched the JerryRig EV build, it must be nice to have such an endless budget!

Ah ideal! Id probs design around a 85-90mph max speed if it was my project.

I think JRE's planetary reduction is the part of that project I would want for any EV project, perhaps one could be made using the planetary reduction from a ZF Auto-box?

R.E range... would a higher load but lower RPM give better range than lower load but higher RPM?
I'd have thought it would be the same power requirement but maybe the higher RPM would be in a better efficiency range for the motor?