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Old 04-23-2017, 06:00 PM   #711 (permalink)
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Or call Arcimoto people? They have a drivetrain OK. All they need is a real body. (I know itīs a tricycle, but its FWD so it doesnīt matter, and their "powerpack" seems to be quite compact, so it could fit in.


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Old 04-23-2017, 07:31 PM   #712 (permalink)
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I'd say it's the other way 'round.

I've inspected and sat in the SRK and the 'airframe' is good, but the 'powerplant' is suspect. Twin 20hp motors (which is good) but they have replaced the geartrain vendor and are reporting 'really good results' with the current one.

If I get one and have any problems, as soon as it's out of warranty I'd drop in the 98lb 68hp axle from Lexus LX400h. Even though it's an open diff.

Else the 2017 Toyota RAV4 has a twin motor, electronic differential like the Arcimoto. You're more likely to shake the parts you need out of Toyota (or eBay).
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Old 04-24-2017, 01:23 PM   #713 (permalink)
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Thanks for the feedback. I am probably going to get the Quonset hut pretty soon - which hinges on my brother building an addition on his garage and entry porch (which I will probably be helping him with).

I am interested to hear the details about the A2 tunnel. That is certainly a LOT closer to me.

Another possibility is to build a more accurate 1/4 scale model on my CNC. The challenge there is redoing the "slices" in CAD, based on the exact thickness of the foam I would use. I would possibly be able to test this at the MIT Wright Brothers 2X atmosphere wind tunnel, which is very close and convenient.
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Old 04-24-2017, 03:27 PM   #714 (permalink)
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Well... Thanks for mentioning the Quonset hut. I have relevant experience.

When I was in the one-time Republic of South Vietnam, I hung out with Catholic and Buddhist relief NGOs (I was a civil affairs officer). Oh, and I lived next door to the Quakers.

The Catholic school in Long An province made a library from a Quonset hut, and they put it on a stem wall about 2ft high. It made a world of difference in the interior space. Then I came back to The World and was making geodesic domes on stem walls.

Also, I designed and built a garage for a retired Colonel in Cedar Grove, OR; the building department there gave me a detail for the slab and [post and beam] wall. Sink 4x4 or 6x6 posts for the [stem] walls. Nail form boards to the inside and outside of the posts. Pour the slab and stem wall monolithically, and strip the forms.

The only thing I would do additionally is paint the posts with epoxy just before you pour the concrete, to prevent water penetration. Other than that it worked great.
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Old 04-25-2017, 02:00 PM   #715 (permalink)
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I am going to use helical anchors, like this:



They are cheap, and they work well in my soil.
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Old 04-25-2017, 09:20 PM   #716 (permalink)
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Dirt floor then? roto-till in some ox blood and tamp it level.
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Old 04-25-2017, 11:08 PM   #717 (permalink)
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Quote:
Originally Posted by freebeard View Post
If I get one and have any problems, as soon as it's out of warranty I'd drop in the 98lb 68hp axle from Lexus LX400h. Even though it's an open diff.
Since it's not meant for off-roading, what would be wrong with an open diff?
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Old 04-26-2017, 01:48 AM   #718 (permalink)
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Black ice.
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Old 04-26-2017, 11:58 AM   #719 (permalink)
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If wind tunnel time is pricey look around for someone with a camera drone. You could do tuft testing on a lonely road with the drone.
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Old 04-26-2017, 01:06 PM   #720 (permalink)
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Quote:
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Black ice.
Then the hub-motors arrangement with torque vectoring does sound better. Either this or a locker diff.

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