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Question: Elon Musk of Tesla Inc. introduced the new Tesla truck-trailer in late 2017

25 Aug 2024,2:02 AM

 

Elon Musk of Tesla Inc. introduced the new Tesla truck-trailer in late 2017 [5]. He announced the following vehicle parameters: gross vehicle weight m = 36,280 kg (80,000 lb) when fully loaded, drag co-efficient Cp = 0.36, and range when fully loaded of 804.5 km (500 miles) at an average speed of 96.54 km/h (60 mph). Assume the vehicle has the following attributes: vehicle cross- section A = 9 m², co-efficient of rolling resistance CR = 0.006, nominal efficiency of the powertrain and transmission Mpt = 85%, auxiliary load Paux = 2 kW, tire radius r = 0.55 m, four Tesla Model S traction motors combined and rated at 1760 Nm and 1080 kW, gearing ratio ng 20, and gearing efficiency ng = 95%. Let the density of air pair = 1.2 kg/m².

 

Determine the battery energy required to meet the range when fully loaded. Determine the approximate time for the fully-loaded truck-trailer to accelerate from 0 to 60 mph, while ignoring vehicle load forces. 

 

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