Revisiting hill climb and descent

Test Vehicle

• 2019 Std Rng Plus Model 3, Odometer 49824 mi
• • Version 2021.4.18.2
  • 4,000 lbs weighed in 2019 at truck stop scale
  • 18" Bridgestone ECOPIA, light weight rims, 50 psi

Test Protocol

• 73 F, 4:30 AM, no wind, dry pavement, 63 mph, Autopilot steering and speed control
• Flat segment:
• 
  • 1st pass: 1.5 mi, 229 Wh/mi
  • 2nd pass: 1.4 mi, 226 Wh/mi
• Hill climb and descent:
• 
• Climb: 1.4 mi, 776 Wh/mi ~= 1,086 Wh
• Descent: 1.5 mi, -241 Wh/mi (charged) ~= -239 Wh
• ~2.9 mi, 847 Wh, ~292 Wh/mi
• 292 - 228 ~= ~64 Wh lost ascending and descending 525 ft hill
• 121.9 Wh / 1000 ft or ~0.53 miles / 1000 ft

Vehicle energy graph:


I do have the original photos. Questions?

Bob Wilson

 

Thank you! Fixed units.

I had no expectations beyond knowing hills have a modest effect because regeneration on descent is so effective. So we have foothills to the East towards Atlanta; the Piedmont plateau to the North towards Nashville, and some modest hills in Western Arkansas going towards Joplin. Past experience has shown my Tesla Model 3 handles them easily.

Bob Wilson