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Old 10-19-2020, 03:43 PM   #51 (permalink)
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Quote:
Originally Posted by Christopher Jordan View Post
I much prefer the 3-wheel; but this appeared tonight with in-line seating:
https://www.designboom.com/technolog...O328WCGoJHvO4k
750w will easily hit 35 mph... my 500w mid drive will do 30 mph on level ground with no pedaling (it's electronically limited there, though). A pretty neat/clean alternative to something like a Honda GROM for city folks living in apartments.

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Old 10-23-2020, 04:02 PM   #52 (permalink)
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another 20 MPH

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Originally Posted by Angel And The Wolf View Post
Was the 5th edition written when the National Speed Limit was 55 MPH? Another 20 MPH should mean a more gradual taper.
Technically, once the supercritical Reynolds number is reached ( around 20-mph ), the drag coefficient will be constant up to around 250-mph, when compressibility effects of transonic flow comes into play.
The 22-degree threshold is from W.A.Mair's research of 1969. Buchheim et al. went as far as 22.5-degrees on prismatic bodies, when the aft-body constituted 45% of total vehicle length. It's very conditional.
Both limits are effective only if the appropriate 'run-up' contours are respected.
If we had a 'true-length' plan-view image of the trike, taken from above, it would give us much-needed information.
The shape defined by the sweep of an analog clock's second hand, between 12:00, and 4-seconds after, provides the proper run-up.
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Last edited by aerohead; 10-23-2020 at 04:05 PM.. Reason: add data
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Old 10-23-2020, 04:14 PM   #53 (permalink)
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more abrupt

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Originally Posted by Angel And The Wolf View Post
Yes, in 1978 the National Maximum Speed Limit was 55 mph. At 55, air can follow a more abrupt angle than at 75. I'm going with the 15 degree quote, rather than the 22 degrees that was OK in 1978.
I'd be very interested in a source for such a metric. I've never encountered any citation in the professional literature which suggests that such a relationship exists for vehicles of the dimensions we're discussing.
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Old 10-25-2020, 01:40 PM   #54 (permalink)
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Originally Posted by aerohead View Post
I'd be very interested in a source for such a metric. I've never encountered any citation in the professional literature which suggests that such a relationship exists for vehicles of the dimensions we're discussing.
No, but in aircraft it is known that more severe camber lines (thus sharper deviations) do not result in more drag up to a point at lower speed. Look at the whole ugly gottengen series as an example. Some of them outperform the nasa 64 series of laminar at high angles of attack.

Might be that turbulent is acceptable at low Reynolds numbers.
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Old 10-25-2020, 02:49 PM   #55 (permalink)
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Originally Posted by redpoint5
Auto manufacturing is an impossible market to get into now. The existing players have the advantage, and the only way to make it is either a brilliant marketing strategy, or doing something radically different AND better than the existing manufacturers.
Two electric vehicle manufacturers on the stock market, Tesla and Arcimoto. Both focus on the manufacturing process as much as the vehicle.

Sandy Munro is bullish on three-wheelers, Arcimoto and Nobe. I think his involvement improves Arcimoto's chances of success.
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Old 10-25-2020, 06:07 PM   #56 (permalink)
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Two electric vehicle manufacturers on the stock market, Tesla and Arcimoto.
News & prices for 3-wheel vehicles sure is confusing! I thought the Sonders was worth waiting for, then for the price jump, no employees, possible law suit. BAH! Might be that the only enclosed 3-wheelers will be a choice between a modified Arcimoto or an old Zap.
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Old 10-25-2020, 06:47 PM   #57 (permalink)
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Originally Posted by Christopher Jordan View Post
News & prices for 3-wheel vehicles sure is confusing! I thought the Sonders was worth waiting for, then for the price jump, no employees, possible law suit. BAH! Might be that the only enclosed 3-wheelers will be a choice between a modified Arcimoto or an old Zap.
Seems like In the age of very public crowd funding 9 out of 10 are scams.

Sondors 2 seater seemed the most viable until the 4 year delay and price doubled.

The Solo was never of interest to me but since they make vehicles it’s very unfortunate the solo design isn’t stretched to a duo and offered at an identical price. (They otherwise offering 6 figure luxury cruisers which are of no interest either)


In terms of government many states are silently jacking up and creating special 3 wheel vehicle taxes In the hopes to pre-emptively rip off any future owners
very unfortunate series of events
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Old 10-25-2020, 06:52 PM   #58 (permalink)
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Might be that the only enclosed 3-wheelers will be a choice between a modified Arcimoto or an old Zap.
Have you seen the Arcimoto Cameo [pix needed]? It has an enclosed rear wheel with the frame for a diffuser. I measured an FUV and a complete boat-tailing adds two feet to the length.
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Old 10-25-2020, 07:19 PM   #59 (permalink)
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I had missed the Nobe thread. I do not think that I saw the previous mentions.

I have been trying to focus on new projects and haven't watched for new threads in months.

Have you guys heard of Nio? Kevin posted a video about them 5 days ago.

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