That’s fair in terms of overall energy use. I’d still argue the duty at peak power, and even peak torque, across a land speed run is higher than an average road course. I haven’t done any significant analysis, though. 

It isn’t really a shorter run time in terms of peak power. Our bike was at peak power from the batteries for 25s on our slowest runs. The motor is seeing peak current for the entire run of about a minute on the short course. That’s a long time when manufacturer peak ratings are typically in the 20s-30s range for…

Land speed racing is a different animal than drag racing. The duty cycle at peak power is much, much higher.

Lightning Motorcycles still holds the Special Construction Omega class motorcycle record, no?

The Alta was just in the Production class? 

www.SpeedHertz.com

We just upped the sub 150kg A and APS AMA records by 27mph and 54mph, respectively. 141mph unfaired and 167 faired, with a peak of 173 mph. First year effort, first time out on the salt.

It gets pretty interesting trying to put down good power with a 330lb bike. The 300kg-class bikes have it easy. 

www.speedhertz.com

www.instagram.com/teamspeedhertz

141mph unfaired, 167mph faired, just under 173mph peak speed at the Bonneville Motorcycle Speed Trials...with 61hp on the dyno...

Pleased to see the Henney! Here’s mine, not currently running, getting a Tesla SDU.

https://photos.app.goo.gl/U5rCt4Hcd8niJMCk7

Oh, and there was a version of the Henney with silver zinc batteries, which were actually pretty good then, and far better than lead acid. 

Emailed! Looks like a sweet project. 

The math doesn’t work. A 2 hour recharge on 120V is 4kWh, absolute max...And that’s really stretching it. At 4kWh, you’d need to be pulling only 66Wh/mile. I don’t see it.

I once took a $5k carbon brake rotor in my carry-on. Not even a second glance.

Except it should be on the other side of the shift lever. 

I feel like your clutch lever is on the wrong side of the shift rod. Should be in front (rearward in the car) so it auto-clutches when banging forward on a downshift. Might have to mess with your motion ratio on the shift rods so it will clutch before actuating the drum, but it works really well that way. Your…

What do you consider “similar”? Grade 5's specific modulus is around 10% lower than 6061, for example. That’s hugely significant in my opinion.

I’m from West Texas and several of my old high school acquaintances are employed there. This could hurt.

Good article, overall. I enjoyed reading it and am impressed that the batteries have lasted so long. Is that with no maintenance at all?

Minor problem, you’ve quoted power instead of energy. kW is power, kWh is energy.

Used Herman Miller Aeron. They are ubiquitous, made extremely well, have readily available replacement parts, and are easily found on Craigslist. They also come in a few different sizes. It took me a few weeks to find my size under $200, but I did and it has been well worth it.

Used Herman Miller Aeron. They are ubiquitous, made extremely well, have readily available replacement parts, and…

Holy crap, I never saw this reply. I’m from Post, have probably been by that place numerous times. 

Check out this video from Formula Student Driverless. The course had been run a few times so the car had it down fairly well already, but this is still very impressive.

Call me crazy, but it looks like an Evora to me.

That’s cool. Where in West Texas? I’m from the Lubbock area.