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[NEW2elec]

What do you call solid vapor?

I guess you just call it fast.

It appears to be some sort of yellow motorcycle.

Oh no not yellow.  That is Damon Gold.   

[irdezcam]

Damon has a smaller-capacity battery than the Energica+, but they're able to go twice as far on a charge, and it somehow weighs 70kg less (with all the extra fancy transformer ergonomics).

Call me skeptical but that's quite a stretch.

Here’s a really interesting interview with Guru engineer Sandy Munro, talking about batteries and range:


Hope you all enjoy it!

Cheers 

[MVetter]

The fact that he lists motor inefficiencies before aero is laughable. Look, I suppose for cars it's not as bad as it is for bikes but motorcycle aero is a joke and a half.

[Richard230]

The fact that he lists motor inefficiencies before aero is laughable. Look, I suppose for cars it's not as bad as it is for bikes but motorcycle aero is a joke and a half.

Not so bad if you are in to "dust bin" fairings. 

[princec]

Munro is maybe not so far off the ball as he sounds. Car aero is all within a few % of each other for typically shaped vehicles, and I think the point he's making is that when the aero only accounts for a few %, then the other factors that are easily dealt with using plain engineering under the bodywork, such as reducing cable length, reducing the number of connectors, precision machining the motor, etc, they are now apparently accounting for an actual bigger difference than air resistance. No figures to back it up cited but I suspect he's on to something. There has to be a reason the Model 3 does so much better on range than, well, any of its competitors, per nominal kWh in the battery pack.

The astonishing efficiency of my SR/F is a testimony to the basic ideas he's outlined: I get, I think, 4x the mileage from the same energy as a Model 3, despite the SR/F flying through the air in exactly the same way bricks don't. Only one motor, a single belt, barely any voltage loss through lengthy cables, few connectors, great motor, tiny friction from wheels, and 1/7th the weight or so - despite having about 3x the drag coefficient. When we get over 70mph the tables are rapidly turned.

Cas

[MVetter]

Your range could easily be doubled or more with aero. But yeah let's focus on making the cables going to the motor an inch shorter.

[godot]

Is the OP associated with Vetter Fairings?

[MVetter]

That'd be my dad, yes.

[princec]

Your range could easily be doubled or more with aero. But yeah let's focus on making the cables going to the motor an inch shorter.

You are right, yes, especially with motorcycles but I think Munro is just talking about cars, and they're all in the Cd 0.3 sort of range with not a great deal of variation, and it's really not easy to make them much slippier without them becoming so hideous or outlandish they won't sell, so he's focused on the other aspects where they're just pissing electrons away in the powertrain. Not to mention that drag is far less relevant under 50mph and barely worth mentioning under 30mph and that's where a lot of cars spend a lot of time, so wasting power there is even more of a shame.

Cas

[MVetter]

America has a highway culture. I almost never go 30 on my bike, anywhere.

[princec]

Not even in towns and traffic?

Cas

[Crissa]

I rarely go over 40.

But you know, mountains and all.

-Crissa

[NEW2elec]

The fact that he lists motor inefficiencies before aero is laughable. Look, I suppose for cars it's not as bad as it is for bikes but motorcycle aero is a joke and a half.

Morgan he literally says areo first at the 2:33 mark.
The question was asked which is more important to range a bigger battery or efficiencies?  He said aero, efficiencies (drive train) and weight plus cable length and too many connectors all bleed power.

Luckily with Damon, it's sleek, has a super high end drive train (Mission accomplished) low weight (looks like under 450lbs) and with all components housed in the revolutionary Hyperdrive, the connections couldn't be shorter.

It also has a 21kWh battery back.  But they told you that already on FB. 

Embrace the greatness.     

[princec]

Well, it has been said before, but I'll embrace it when it actually exists...

Cas

[NEW2elec]

Remember before you can embrace something you must first uncross and open your arms, and in this case mind, to enjoy what is good.

I still feel that the time table for production will likely be affected by Covid same as so many other businesses, but they are steadily improving and moving forward.