New Electric M/C aero design is .11 CD

[donpearsall]

Check out the new design of electric bike going for an LSR record. The bike has unique aerodynamic design that has been measured at 0.11 CD. A Suzuki Hayabusa has about a 0.36 CD. The trick is that the bike has a hollow tunnel running from front to back.

Looks great. I hope we can see it run at Bonneville. The only problem is that both wheels have motors. Maybe the rules can be changed for electric bikes.

Don

https://www.cycleworld.com/story/motorcycle-news/white-motorcycle-concepts-wmc250ev-aims-for-new-land-speed-record/?fbclid=IwAR3ntZMRMQv87Y170IqYx3pJeoJoB0uRbTd-C8kpptP0icQABGCVFWzdkNo

[07R1LSR]

Wow.  That thing is pretty bad ass!

[Stan Back]

No can open.

[Koncretekid]

Hard to believe that Cd is so low considering all the extra surface area.
Tom

[Interested Observer]

MIRA or no MIRA, agree with Koncrete, the real world is going to enforce a considerably larger CD.  Hope they are not counting on 0.11 to get to their record.

[panic]

.11?
That allows a tired squirrel to do 100 mph...

[Malcolm UK]

Whilst the bike is shown in the MIRA full sized wind tunnel, I have seen written comment that the 0.11 drag coefficient figure was derived from earlier Computational Fluid Dynamics (CFD) work on the design.

[salt27]

Does 180 degrees of the front wheel need to be visible or is that an SCTA only rule?

  Don

[donpearsall]

180 degree wheel visible is an AMA rule also.

Don

[Doc B.]

Check out the new design of electric bike going for an LSR record. The bike has unique aerodynamic design that has been measured at 0.11 CD. A Suzuki Hayabusa has about a 0.36 CD. The trick is that the bike has a hollow tunnel running from front to back.

I'm googling more like .56 for a Busa. .11 is in streamliner territory.

[fordboy628]

.11 is sort of tough to believe since that is in the range of "Military projectiles".

There are quite a few "lumps and bumps" on that thing pictured.

BUT, WTH do I know.   Any data to post?

[stay`tee]

The front fender is legal for FIM, rule states it must cover no more than 180*, this bike has hub center steering :|

[jacksoni]

.11 is sort of tough to believe since that is in the range of "Military projectiles".

There are quite a few "lumps and bumps" on that thing pictured.

BUT, WTH do I know.   Any data to post?

I agree- really good streamliners get to that range. I wonder if the reporting has confused CdA numbers and Cd somehow as the frontal area is of course small.

[panic]

.11 + 1 fingerprint, decal wrinkle, paint run, open seam, etc. = .115

[WOODY@DDLLC]

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