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Old 03-05-2009, 03:37 PM   #5 (permalink)
bwilson4web
Engineering first
 
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Join Date: Mar 2009
Location: Huntsville, AL
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17 i3-REx - '14 BMW i3-REx
Last 3: 45.67 mpg (US)

Blue Bob's - '19 Tesla Std Rng Plus
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Quote:
Originally Posted by MetroMPG View Post
Sounds very interesting. I'd love to see someone try it.

I take it you're familiar with Mike D's . . . He's using a compact, permanent magnet (15hp peak, I think) compact Etek motor. You could twin a pair of those.
Thanks! This helps and I just found the web site:

Thunderstruck Motors - Description of page goes here. Short sentence that is keyword rich.

8 cont 18 pk hp - 38 lbs (owch!)

But I do like their specifications. A pair would give enough peak power to briefly handle higher speeds. Also the 8" OD is a challenge. However, located next to the strut fitting. Space is tight!

Quote:
Originally Posted by MetroMPG View Post
. . .
Somewhat closer to your description is the not yet released Poulsen plug-in hybrid system: . . .

That approach uses "pancake" permanent magnet motors attached to each of the rear wheels @ 72v nominal.
I'm more interested in their motor source but it is another, very practical approach. Combined with the rear wheel covers, it looks almost practical. But the press release I saw indicated they aren't quite in business yet.

Thanks! This is the type of information I was seeking. I like the "Et-RT" motors but I would add 80 lbs to the rear axle and in a space that is already constrained. A carbon-fiber beam might do the trick, essentially replacing the whole rear wheel assembly. At least there is enough engineering data I can do some sketches.

FYI, I am interested in for my NHW11, 2003 Prius:

That photo is from my work on Prius 4-wheel alignment using shims.

Thanks,
Bob Wilson
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2019 Tesla Model 3 Std. Range Plus - 215 mi EV
2017 BMW i3-REx - 106 mi EV, 88 mi mid-grade
Retired engineer, Huntsville, AL
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