Radical SRZero

[domenick]

I believe the (Evo Electric) motors were specially wound for this car. The idea was to tone down performance and increase durability.

 

[JRP3]

That doesn't really make sense. If you want to tone down performance you just set the controller to limit amp draw which keeps heat down and thereby increases durability. They could have rewound the motors to run better at a different pack voltage.

 

[domenick]

That doesn't really make sense. If you want to tone down performance you just set the controller to limit amp draw which keeps heat down and thereby increases durability. They could have rewound the motors to run better at a different pack voltage.

Appears I don't have it from the horse's mouth, that I can find. I'm sure I read or heard that a couple times somewhere though but I can find no trace of it now.

 

[TEG]

I believe the Evo Electric motors were specially wound for this car..

Appears I don't have it from the horse's mouth, that I can find. I'm sure I read or heard that a couple times somewhere though but I can find no trace of it now.

http://www.wired.com/autopia/2010/05/racing-green-endurance-srzero/
http://www.connect-green.com/the-green-car-that-couldthe-story-of-srzero/

...The SRZero has the SR8’s 2.6-liter V-8 engine and six-speed gearbox replaced by two AC synchronous Axial Flux motors. The motors were custom-wound to maximize efficiency at highway cruising speeds. They produce 72 kilowatts (96.5 horsepower) continuous and 144 kilowatts (193 horsepower) peak...

http://www.theengineer.co.uk/one-for-the-road/1006273.article

...the motors also had to be custom wound to ensure that they worked at 95 per cent or greater efficiency at the 40-65mph average cruising speed of the car...

http://carnews.gossipblender.com/ca...an-15000-mile-journey-in-electric-sports-car/

...the electric drivetrain, which consists of two custom-wound, 193-horsepower motors and lithium-iron-phosphate batteries, is 90-percent efficient...

​

 

[JRP3]

They could have rewound the motors to run better at a different pack voltage.

As I said.

 

[domenick]

Thanks Teg. :smile:

 

[dpeilow]

The RGE team's documentary is being aired on BBC World News over the next few weeks. The first episode is on today, see http://www.bbcworldnews.com/Pages/Schedules.aspx

Unfortunately, the only place you can't see this BBC channel (without re-pointing satellite dishes) is Britain. Would anyone be kind enough to record and youtube it please?

 

[dpeilow]

Here's how to watch the documentary if you can't get BBC World News via cable or satellite:

http://www.epctv.com/channels/BBC_World_News-Online-Watch-4533.htm


The second installment is today at 20:30 GMT.

 

[dpeilow]

Starting now

 

[TEG]

http://racinggreenendurance.com/DVD/
RACING GREEN DVD | Von Planta Productions
Electric Adventures
Electric Adventures
BBC Trailer for RACING GREEN on Vimeo

 

[dpeilow]

My copy of the DVD just arrived. I'm half way through the first disk - excellent, seat of the pants stuff.

Seriously recommend you buy a copy if you missed the series on BBC World.

Racing Green Endurance - DVD Order

 

[JRP3]

Extras: For an extra $125 you will get a DVD signed by the team and Claudio.

Are they smoking crack?

 

[dpeilow]

Claudio is fairly well known, but yeah - that's a lot.

Fortunately you can get the normal version for $32.

 

[dpeilow]

I finished disc 2 earlier. One word: Amazing. The stuff they had to deal with in the second half of the trip was insane.

Well worth buying for all EV fans. Probably the best EV documentary you'll see this year...

 

[TEG]

...Probably the best EV documentary you'll see this year...

You would put it up against "Revenge of the Electric Car" ?

 

[dpeilow]

Well, I haven't seen the latter. But I have a hunch it's going to be a 2 hour advertisement.

 

[JRP3]

Another take on the adventure:

First, they built an open top SRO race car with a massive 50kw Thundersky battery pack and a 3.5 inch ground clearance to drive across the Pan American highway. Idiotic in concept from the get go. The tiny racing shock absorbers were sporting 1100 additional pounds of batteries. Engineering school apparently isn't what it once was.

But their "mission" was to drive from one press event to another, touting how electric cars were finally here and practical for every day driving. Instead, they rather proved both graphically and dramatically that it takes a half a dozen recent engineering school grads to even keep an electric car rolling at all.

Never at any point in the journey did they pick up on the irony. They wrecked the car twice. It burst into flames several times. And they failed every piece of equipment in the car with the exception of the very sexy EVO motors they had. All four shock absorbers broke at various times in the journey. They burned up their chargers. They burned up their BMS quite frightfully and the DC-DC converter at one point. Almost everything we've ever destroyed here in the shop, they managed to tick off the list on the road. No matter how rain bedraggled and discouraged, there they would be at the next press event with the canned speech about how great the electric car was and how well adapted it was to all of this. I watched every minute enthralled.

http://jackrickard.blogspot.com/2011/05/let-voting-begin.html

 

[Slackjaw]

I finished disc 2 earlier. One word: Amazing. The stuff they had to deal with in the second half of the trip was insane.

Well worth buying for all EV fans. Probably the best EV documentary you'll see this year...

I just got my DVDs and have to agree with David that this is excellent stuff! Really entertaining. They don't go into a lot of technical detail but it is action-packed and nicely filmed. The sound seems a bit fuzzy, but I also had to stop watching at one point because I couldn't hear over the sound of the Roadster charging in the next room (basement home theatre, door into the garage... I leave the door open so that that basement AC can better cool the garage when the Roadster is charging in "hair dryer" mode).

Thanks for the pointer to this series, which I would otherwise have missed.

 

[rabar10]

...but I also had to stop watching at one point because I couldn't hear over the sound of the Roadster charging in the next room

Why did this remind me of the cliché movie or commercial scene when someone is trying to talk to the guy in the muscle car, who is revving the engine to drown him out? :biggrin: