New Electric M/C aero design is .11 CD

[mgriffiths]

Here is the link to the EU/UK Patent:

https://worldwide.espacenet.com/patent/search/family/063667162/publication/EP3833595A1?q=pn%3DWO2020030749A1

Basically a patent for a motorcycle with and orifice through the center.

I find it hard to imagine that this complexity is any improvement on the state of the art for motorcycle aerodynamics, which I'd say is Alp's Assymetric Aero -

[jacksoni]

Ok. I misspoke but now they are claiming a Cd much less than 0.1 (if the CdA is .118) A good airfoil is 0.05 or so. It has some frontal area. I still suggest 

[Frank06]

The proof is in the pudding....

Lots of discussion about aero benefits (which look really interesting!) but not much mention of powertrain components.  I hope they do well.

[RansomT]

Part 1: https://www.youtube.com/watch?v=EuscGZyMojk
Part 2: https://www.youtube.com/watch?v=PkHCc_6RUaM&t=38s
0.118 CdA BTW @1:30 - more superb journalism by our loving press!
Part 3: https://www.youtube.com/watch?v=zJhUqUTINHQ

Thanks for the video! 

[stay`tee]

thay have added surface "drag" area to the machine 

front wheel drive may work well on ashpelt, not so well on salt 

[gowing]

thay have added surface "drag" area to the machine 

that's what I was thinking,
but I ain't no aerodynamics expert so I figured I'd just keep quiet.
and... maybe these guys know something that I don't.

Are there any videos of it actually being ridden?
everything that I have seen is either wind tunnel testing, computer simulations
or beauty shots.

[Bratfink]

He said 0.118 CdA in the vid. I don?t really know what the frontal area is but another source for a super bike manufacturer gave me theirs as a 0.33 m^2.

If we assume the same frontal area the Cd is 0.357.

I can believe that. Most super bikes hover around 0.5-0.6. And they say this is 70% better. I will say that most motorcycle aerodynamics struggle with converging the flow behind the rider. This tunnel idea does significantly help with that.

I?ll be interested to see this run.

[Rex Schimmer]

Time to stop the BS, bring it to the salt, plant the monkey on it and twist the right hand grip to WFO and let's see what happens.

Rex

PS: As we all know "it ain't as easy as it looks"!

[stay`tee]

Time to stop the BS, bring it to the salt, plant the monkey on it and twist the right hand grip to WFO and let's see what happens.

Rex

PS: As we all know "it ain't as easy as it looks"!

x 2

[Stainless1]

Yep Rex, like the old saying goes... talk is cheap... takes money to buy whiskey....
Everybody sets a record on paper.... the salt sorts the BS into reality.... 

[Alyn]

according to the google machine, CdA includes Cd, frontal area and surface drag per, so it is not comparable to regular Cd.

[coleasterling]

Signed up to post about this one. Several sites misquoted the 0.11 as Cd, when it is definitely CdA in meters squared. In sqft, that's 1.27. I'd expect the Cd is still very low.

For comparison, our electric (Team Speed Hertz) that ran BMST this year has 5.625 sqft of frontal area and an estimated Cd (CFD, still analyzing run data, but it's in the ballpark) of around 0.29 for a 1.63 CdA. In those other units, that's 0.152 meters squared. That's 25ish% better...seems pretty reasonable to me.

[RansomT]

0.29 Cd is darn good for a M/C

[Stan Back]

Could someone expand on what CD, CFD, CDA, etc. stand for and mean?  I just figured out the MC, so please help me along.

[racergeo]

  You started it Stan, and now our education begins. Next HP