EngineeringTV: Working for Tesla, S Prototype

[mpt]

Engineering TV have posted up a couple of interesting videos on working for Tesla and on the S prototype

Working for Tesla Motors - Engineering TV

Tesla's New S-Prototype - Engineering TV

Thanks EngineeringTV

{ Source EngineeringTV (EngineeringTV) on Twitter }

 

[tdelta1000]

I like to the video series. The host had some really good questions which opened the door just a little wider on the Model S.

The Tesla VP stated that the Model S will have more batteries than the Roadster which may equate to greater taveling distances. He also mentioned that the Model S will have more horse power than the Roadster based on an upgrade motor. He also agreed with the host in calling the NAIAS "S" a Prototype. I can't wait until official details are released about the "S".:smile:

 

[Tin-Chicken]

It was fun.
Tesla Motors - Engineering

Lisa.

 

[TEG]

Why does the chief engineer say that the Roadster sport has about 240hp, when the specs say 288?

 

[vfx]

We were told 8000 batteries for the Model S when it was announced.

I believe this was the first mention of induction charging being on the table.

 

[tdelta1000]

We were told 8000 batteries for the Model S when it was announced.

I believe this was the first mention of induction charging being on the table.

VFX,

With 8000 batteries does that mean the "S" will have a range of 300 miles or greater if the Roadster pack have a stated MAX range of 244?

 

[TEG]

http://www.teslamotorsclub.com/tesla-model-s-whitestar/2478-model-s-specs.html

• 160 mile range base pack (42kWh, 5500 cells)
• 230 mile range upgrade (~60kWh, 7800 cells)
• 300 mile range upgrade (~90kWh, 7800 next generation cells)

But, I assume everything is subject to change.

 

[tennis_trs]

Why does the chief engineer say that the Roadster sport has about 240hp, when the specs say 288?

Also, that page now shows the base model having 288hp, but the page used to show the base model having 248hp, but I believe I've always seen that page showing the Sport having 288hp.

 

[TEG]

I find this "we can't decide if it has 248hp or 288hp" rather peculiar.
My pet theory is that it is a difference between possible short-term peak HP versus longer term sustainable max HP. (Like how Autobahn tests showed that the ~125MPH top speed only lasted a little while then dropped down to something like ~105MPH).
But that is just a theory.

 

[tennis_trs]

I find this "we can't decide if it has 248hp or 288hp" rather peculiar.
My pet theory is that it is a difference between possible short-term peak HP versus longer term sustainable max HP. (Like how Autobahn tests showed that the ~125MPH top speed only lasted a little while then dropped down to something like ~105MPH).
But that is just a theory.

Where is the "we can't decide if it has 248hp or 288hp" quote from?

 

[TEG]

It just seems the message is unclear on HP for Roadster & Roadster Sport.
I think the Sport is supposed to be 288hp, and the non-sport 248hp, but what about all these?:

• This spec sheet claims 288hp for both standard Roadster & Sport.
• This spec sheet also talks of sport and non-sport but lists only 288hp.
• At -1:48 in this video they say "The Roadster Sport has about 240 horsepower."
• This picture shows the electric motor and lists "288hp (185kW)". Which is confusing because 185kW is roughly 248hp.
  
  If it were just once or twice I might think it was just an isolated oversight/mistake...

Even car magazines are saying the non-sport does 288hp.

In Sport form...its motor produces the base unit's same 288 horsepower...

So, what are we to think? The "base model" has 288hp? The Sport has 248hp?

 

[TEG]

More showing the base model as having 288hp now:

Tesla Motors - performance specs

Base: Output 288 peak horsepower (215kW) and 273 lb-ft (370 Nm) of torque. Redline at 14,000 rpm.
Sport: Output 288 peak horsepower (215kW) and 295 lb-ft (400 Nm) of torque. Redline at 14,000 rpm.

Tesla Motors - technical specs

Max Net Power
Base: 288 HP (215 kW) @ 5,000-6,000 rpm
Sport: 288 HP (215kW) @ 4,400-6,000 rpm Max RPM 14,000
Torque Base: 273 lb-ft (370 Nm) @ 0-5,400 rpm
Sport: 295 lb-ft (400 Nm) @ 0-5,100 rpm

Did the 2008 base model make 248hp, and the 2010 base model makes 288hp? Did they just quote 248hp as a conservative number even though all along it has been making more like 288hp?
Did they keep quoting 248hp until the last of the DT1.0's got upgraded to 1.5 (or now 2.0)?