Impact/EV-1:a forensic reconstruction

[aerohead]

Originally Posted by NeilBlanchard

If I had to guess, the GM Impact was the car that has the Cd of 0.19 and the EV1 was 0.20. The rear wheel strakes look to be significantly better.

They could have just changed the name to EV1 and kept the design of the Impact, and they would have had a runaway hit.

And the later EV1's had NiMH batteries that had about 150 mile range. It was too good, and they squashed them ...

Both Impact and EV1 were reported at Cd 0.19.
Later,during wind tunnel development of the 1999 PNGV 'Precept' concept,GM's team leader reported the EV1 at Cd 0.197.All along there were 'points' never mentioned.
And GM has down-graded their previously published Cds,so it's very difficult to make anything of their quanta.Too bad!

[Bill the Engineer]

I will post some photos of EV-1 literature as soon as I have enough posts to do it.

Bill the Engineer

[Bill the Engineer]

Here is some EV-1 literature I got in the mail back when GM was first promoting it.

Bill the Engineer

[aerohead]

We see on page 6 of the brochure,across from the plan-view of the car,a Cd 0.19.No points,inferring Cd 0.190,when it's 0.197.

[kach22i]

Nice addition to the thread Bill.

I noticed some scale cars in your photobucket, thought you might like to know about something I saw at the Detroit Institute of Arts gift shop.

2014 DIA Detroit Photos by kach22i | Photobucket



My old neighbor was an engineer for GM, he allowed me and a couple other guys in the neighborhood to test drive an EV-1 around the block. It was a real hoot, loved the torque aspect of it, was better than a muscle car.

[Bill the Engineer]

Originally Posted by kach22i

Nice addition to the thread Bill.

I noticed some scale cars in your photobucket, thought you might like to know about something I saw at the Detroit Institute of Arts gift shop.

My old neighbor was an engineer for GM, he allowed me and a couple other guys in the neighborhood to test drive an EV-1 around the block. It was a real hoot, loved the torque aspect of it, was better than a muscle car.

Thanks for the tip. It's been a couple of decades since I've been to Detroit. I should plan a trip there.

Bill the Engineer

[aerohead]

Here are a couple images from GM's EV1 brochure,with AST-II contour comparisons.
The LSR car is from a very dark photo.I tried to tease it out best I could.

[aerohead]

I found this pixelated,larger image online which is most likely from GM's promotional VHS they sent out free for the asking back in the day.
It's close to a true-length image.Goro Tamai reported this car at Cd 0.14,I think from Bart Hibbs of AeroVironment.

[aerohead]

When the EV-1 finally bowed publicly,AeroStealth and I drove from Radium Springs to Saturn of Tucson for a look and test drive.
Dr. Paul MacCready of Aerovironment had mentioned that the GM Sunraycer would be a 400-mpg car,and the EV-1 would be around 100-mpg.(The Cd 0.19 GM Ultralite was rated at 100-mpg).
Our thought was that Saturn could have used the Impact/EV-1 body and sold a 80-100 mpg gasoline stablemate along with leasing the EV.
Without the battery pack,the gasoline car could have been a 4-seat,2-door coupe,or a 4-dr sedan as Chrysler did with their little car which had the PT Cruiser variant.
Shame.EV-1 was constructed just like Saturn cars.It could have rolled down a real assembly line.

[aerohead]

Originally Posted by Old Tele man

We (GMHE) also worked on the Sunraycer's power converter system, helping GM to maximize its conversion efficiency.

What was in your GMHE Culver City dumpster was probably much more valuable than anything in my house!