<div dir="ltr"><br><div>Right, but the hole doesn't seem necessary to me. After all, wings utilize the "venturi" effect, without a hole in the middle of them. Wouldn't the hole just add lots of extra mass and increased drag, to achieve the more complex structure? Wouldn't a simple tear drop shape, without a hole, be more efficient?</div><div><br></div><div><br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jun 25, 2021 at 8:02 AM spike jones via extropy-chat <<a href="mailto:extropy-chat@lists.extropy.org">extropy-chat@lists.extropy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
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From: extropy-chat <<a href="mailto:extropy-chat-bounces@lists.extropy.org" target="_blank">extropy-chat-bounces@lists.extropy.org</a>> On Behalf Of BillK via extropy-chat<br>
Subject: [ExI] World's Fastest Electric Motorcycle<br>
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"World's fastest electric motorcycle" uses radical big hole technology By Loz Blain June 24, 2021<br>
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<<a href="https://newatlas.com/motorcycles/wmc-2wd-electric-motorcycle-v-air/" rel="noreferrer" target="_blank">https://newatlas.com/motorcycles/wmc-2wd-electric-motorcycle-v-air/</a>><br>
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>...The idea is that the innovative venturi hole produces extreme reduction in air resistance and, in turn, for street use this should produce longer range, or smaller batteries, or increased speed, or a combination of these benefits,<br>
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BillK<br>
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Cool! I wouldn't be too surprised if it is real. It makes sense. The reason motorcycle top speeds are as low as they are (200 mph or about 320 kph for the fast production bikes) is all about wind resistance. With gas burners, that problem is inherent. Electrics I don't think the drag coefficient needs to be as high.<br>
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Let's see where it goes.<br>
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spike<br>
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