Nitpick: Aerodynamic drag is quadratic (squared), not exponential. There is 4x as much drag when going 2x as fast. Power needed to overcome aerodynamic drag is cubic. You need 8x as much power to go 2x as fast.

@jpkatz1435

2 жыл бұрын

Not a "nitpick" very important for us non engineers, non math minds, to understand!! Thanks for adding this.

@laurean5998

2 жыл бұрын

Came to look for this comment, I know almost everyone makes the mistake but at least engineers shoud try to do better

@Chris-bg8mk

2 жыл бұрын

Drag=1/2Rho *Cd *v^2 *s Why do you need 8x the power when drag only increased by 4x?

@drt1245

2 жыл бұрын

@@Chris-bg8mk Power = Force * Velocity

@duncanmartin2626

2 жыл бұрын

@@Chris-bg8mk Power = work /time Work = force * distance So Power = force * speed (and force is your aero drag calculation plus rolling resistance etc)

the badass part: this car started the record run on it's own with a 2:1 direct drive. nothing else but an EV can achieve that, the load must be insane.

@AKAtheA

2 жыл бұрын

pretty sure gas turbines *can* do that, their torque graph looks very similar to electric motors...

@yankeedoodle7693

2 жыл бұрын

@@AKAtheA a good example of misconceptions in EV dynamics

@Smidge204

2 жыл бұрын

@@AKAtheA Gas turbines have a minimum speed they need to operate; if they're not spinning, they're not compressing air into the combustion chamber, there's no combustion, and there's no power. This is why such turbines aren't self-starting. The output torque curve of an electric motor goes all the way to 0 RPM, the torque curve of a gas turbine does not. The torque curve of a *steam* turbine, or some other type which has high pressure fluid being pushed through it from an external source, goes all the way to zero... but the curve for any Brayton-cycle turbine will not.

@yankeedoodle7693

2 жыл бұрын

@@Smidge204 the gas generator and power turbine are separate stages on certain designs. You can stall the output shaft on a turboshaft engine

@AKAtheA

2 жыл бұрын

@@Smidge204 very few gas turbines have the LP turbine mechanically locked to the compressor and HP turbine. Because it's free to spin independent of the gas generator, it gives torque right from stall.

That was great. Can't believe a design so old is still leading the way.

@GingerNingerGames

2 жыл бұрын

The funny thing about computers is they do the same calculations we used to do with wood, they just do it faster.

@daos3300

2 жыл бұрын

aero could use a lot of work, could be much faster. but why build a new car when you already have one that's good enough.

@Roguescienceguy

2 жыл бұрын

Well those guys were something else back then. They did get a man on the moon on a pocketcalculator

@lorenzosguaitamatti

2 жыл бұрын

Back then, they made a leap forward with electronic systems, to get the man to the moon. They could still use the same chassis and create a better bodywork. Maybe they are sticking to what they know and to what they tink is safe to drive, managing only one difference at time. Also budget could be a limit.

@JackMott

2 жыл бұрын

@@lorenzosguaitamatti It isn't immediately clear how to improve the body work. Maybe smaller front wheels and get rid of those ridges, but that could negatively impact rolling resistance. To improve for sure would require a lot of time field testing or time in a wind tunnel. both are expensive.

As someone who owns a 300w LED flashlight that puts out about 19,000 lumens, I can confirm that a 1000w flashlight would be insanely bright.

@DevReaper

Жыл бұрын

I own a flashlight with a “mere” 4200 lumens and it burned through my jacket pocket without even being on turbo.

@MrGatlin98

Жыл бұрын

@@DevReaper Sounds like a D4V2 or similar light. Nice.

@DevReaper

Жыл бұрын

@@MrGatlin98 yep spot on D4V2 with SST-20 5000k leds

@ytdrachengame1157

Жыл бұрын

The Imalent MS18 has a Peak power of round about 1000 watts. 🤟😎

@loneponderer495

7 ай бұрын

I hate to be that guy, but it's kWh not w. Yep, I'm here to ruin your joke. 😂

In 63 years it will be fusion powered using banana peals!

@lazarusmagellan2367

20 күн бұрын

I’ll come back to this comment when I’m 80

I'm not sure about the algorithm, but I'm really impressed both by the video and the car

@thecatofnineswords

2 жыл бұрын

Trust the algorithm. It knows. All hail the algorithm

@CED99

2 жыл бұрын

All Hail the algorithm

The Vesco family are legends in land speed racing - it's cool to see that still running and setting records.

@rdaw33

Жыл бұрын

Anyone know if this is the family that once included "Don Vesco", who I saw run there in 1976 running as I remember two road racing two stroke engines?.......

@rdaw33

Жыл бұрын

Almost forgot, it was a two wheeled motorcycle.

@greggbrooks6086

Жыл бұрын

@@rdaw33 Yes , Don Vesco Yamaha in El Cajon Calif. I raced motocross for them in the mid 70's.

Something about your videos is just perfect. Entertaining and technical, one of my favorite channels. Maybe my favorite car channel. Maybe my favorite channel of them all.

@cellularmitosis2

2 жыл бұрын

yeah, he's definitely hit a sweet spot

Great video! Super cool to get some additional info about some of the "teething" problems the team had when going for the record and how they solved for them!

Great video. Love seeing the evolution of the channel.

Outstanding tube Matt! Apart from the stuff already noted I loved the throttle with the toe clip to pull it up in case it sticks and one tyre down to the cords. Gold.

Great stuff Matt! All hail the algorhitm!

Gotta love the engineering that goes into landspeed racing!!!!!

@thatguyalex2835

Жыл бұрын

Same here. I am curious if the engineers working on the fastest electric car will do a solid oxide fuel cell (SOFC) run. Those could run on kerosene or ethanol, and output megawatts. If using e-kerosene (produced using renewable electricity, developed by Siemens), we would have the fastest green car in the world. :)

@sheanyquist

Жыл бұрын

@@thatguyalex2835 the engineer working on the fastest electric motorcycle is not doing that. 😉

This was easily the best delivered explanation of how and why I've ever seen. Thanks Matt.

I wish more videos would explain the C ratings of the charge and discharge of batteries, this is just as important as capacity when it comes to performance.

@guily6669

2 жыл бұрын

I wish was that every god damn battery from every brand had C rating graphics as we have to search online for community tests to find out how good they are and most brands lie.

@Suchness2000

2 жыл бұрын

Capacitors will give more instant power than just batteries. Add lots of big capacitors along with batteries. Capacitors can deliver their charge faster than batteries.

@Martin_Speed

Жыл бұрын

@@Suchness2000 LTO is a better choice

Thanks for the video Matt it's really really really good and both educational and entertaining

Excellent as always Matt, many thanks 👍 First merch arrived yesterday in the UK (stickers) 😃

Nicely built video Matt. Thanks for it!!

All hail the bald tyre

Amazing history in that car. Too cool.

Excellent, thanks.

If you're having trouble wrapping your head around the concept of putting 2 or more electric motors or any kind of motors together and getting them to work together and not against each other, just think about how the cylinders in a multi cylinder engine work together, there may be a slight mismatch in power between the cylinders and some percentage of "fighting". The average is a increase in power.

@nordic5490

2 жыл бұрын

No. These motors are not coasting. If one motor outputs 5% more than the other that is not a big deal. Even a 20% difference is fine.

@EVLS10

2 жыл бұрын

@@nordic5490 Not exactly. If they are putting out different levels of torque then that's perfectly fine. The issue at hand with syncing electric motors is frequency and speed. It is imperative that both inverters be driving the same frequency and thus speed to both of the motors. As long as they did the code right the first time then they are good. If they differ though. You get very large problems which results in massive motor/inverter strain in the form of excess current and heat buildup. This is why we use synchronization tech with our power grid to make sure the motors are spinning at the same speed and the phase angle is the same. One motor shooting for 5000 rpms and the other being slightly different will cause a ton of stress on both motors as both rotors are now fighting their perspective rotating magnetic fields because they are constrained together. The major benefit is that most inverters these days are smart enough to detect issues like this and avoid them or you can just run them in torque mode so that the frequency output is driven by the rotor speed alone.

@wolfgangschroeppel

2 жыл бұрын

@@geemee3364 Yes, but the control of both is Amps. So the "throttle" is controling the torque, not the speed. But yes, you need two seperate inverters to do that trick. What I don't get is what the belt is for. You could drive one wheel with each drive train without coupling the motors and without any differential.

@ArneChristianRosenfeldt

2 жыл бұрын

@@wolfgangschroeppel How would that look like? Cross wind would be a problem with this idea: Two bikes next to each other, but staggered staggered. The motor for each wheel is in the other bike. Directly connected by 4 shafts. Pendulum axis like on a bug.

@BoB-Dobbs_leaning-left

2 жыл бұрын

An inverter is simply a form of amplifier, it amplifies a signal. In a solar power system the signal is the frequency of the mains voltage required ie 50 or 60 Hz depending on your country. There seems to be no reason you couldn't use a single signal generator (speed controller) to control multiple inverters, in fact that is the way many multiple inverter systems work.

Well produced and informative. Great job mate.

Another excellent video. Thank you!

This channel is the most interesting and entertaining channel in KZread. It is always like christmas to notice there is a new episode available to watch!

Excellent story. Thank you for sharing the engineering details!

Entertained and learned a bit. Thanks for the video Matt!

This was an awesome video, well thought out, narrated well, visual aids etc.

Another reason to love SFM ... the science of speed explained in a way even I can understand. Thanks. “Omnes algorithmus salvete”

Thanks for another informative video Matt!

Excellent video. I love your editing

Your content is ridiculously fascinating!

love your content thanks for making this

I love that they have a chassis that old that is still holding up and laying down some record runs.

Excellent little docu video. Well done.

Excellent presentation

You have the best content. I have yet to be disappointed.

The model b to model s joke made me laugh too hard

Loving your content!

great vids matt!

2:54 love that ghost on the garage floor

All hail passionate people

Very interesting stuff mat. Can't wait to see the jag finally get finished and seeing the reactions 😇

U forgot 1 ingredients in the recipe one giant set of balls to drive it

Positive algorithm engagement comment! I like these short docos, you explain things well.

This is one of the best storylines you have published.

Thanks for sharing.

Always great videos. Hello from Brazil

Good stuff 👍

Nice video. Bonneville seems like a cool place

Seems like a dedicated chassis is what they really need. Design if from the ground up to hold 4 or 6 battery packs and 4 motors and drivers. Land speed cars are weird in that they don’t care about weight or maneuverability so they could make it longer without much drag penalty to fit everything in.

Great vid! Thanks!!

Awesome! Thanks!

Pretty frigging cool! Thanks!

I didn't know that about the hybrid batteries. Great info as usual.

Great video!

This is great! I was curious, and now I know!

Cool vid, thanks Matt.

Incredible and enlightening, great wake up

That was awesome. Liked, commented, subscribed

I like how they are using a Fireboard BBQ temp monitor on the battery.. 6 probes sharing temp data via Bluetooth and wifi to the cloud… why wouldn’t you…

Very interesting, thanks for sharing 😎😎😎

such a great story thank you

The TGV uses electric motors and that managed 357mph (5mph faster than this) in 2007… Guess the diesel generators it uses to power it’s bogies kind of makes it a hybrid rather than a full electric record though.

@jsquared1013

2 жыл бұрын

Diesel-electric hybrid, not a battery-EV

@stonedmole2351

2 жыл бұрын

The TGV is an all electric train

@niconico3907

2 жыл бұрын

TGV has no diesel engine, it is powered by overhead powerlines, like in any civilised country.

SFM: You are a fabulous teacher, presenter, describer. You have a 76 year old Fan Boy here. THANKYOU.

Thats Cool Thanks Matt

I love seeing pieces on Bonneville builds

Thanks for the details. seeing that Tesla drivetrain I thought they had two motors/ rotors going there, but I didnt knew the other cylinder was just an inverter... :)

8:39 Dang, I need to step up my 100W LED flashlight with 9 more

That was good. The way you showed the rapid advances makes me confident they will beat the ice cars. If they only had room for a longer battery box they might have had the class record.

Very cool. A place I have always wanted to visit

Love the landspeed videos! All hail the Algorithm!

I wonder if you could make some sort of supercap setup work? You would need tons of space but they would spit out as much power as you need

Thanks for sharing. 😉👌🏻

All hail the algorithm! Thanks for this vid Matt.

great vid thanks

I'd love to see how they designed that Belt drive system for the motors! Amazing that it can handle a thousand horsepower!

Amazing those TESLA motors,AMAZING TECH

Love it. Fascinating.

Has anyone said you’re an awesome presenter yet? And this video was absolutely amazing.

Can't believe I saw it in person its was a Beauty

Funn video thanks for sharinn great edit as well

The Vesco's are a great family....When I raced Yamaha TZ motorcyles back in the late 70's early 80's they always seemed to have parts in stock for our bikes even when Yamaha USA had empty shelves....Bonneville Royalty right there👍

Great video.

Thank you!

Thanks Matt for another video full of facts and funny comments.

Quality video

Good video!

Thank you for another great video. It deserves a "Clarkson", the award for a great motoring video. Thanks again. P

Do you know the continuos c-rating for the Honda cells?

Cool! And I learned more "something new".

5:15 they're going to change those tires before the next run...right?

I love the “0 - a lot” graph 😂

Would it be worthwhile to have two separate battery banks and switch between the two every 10s for example? So bank 1 can run at max/best output for 10s then swap to bank 2 for 10s and repeat.

Wow, EV controls have the solution for Model 3 rear drive unit? Anybody seen projects using it with that drive unit? I'm interested in real world feedback...

Great stuff, now how about that ev jag? 😁

Gotta love the engineering that goes into landspeed racing!!!!!. Gotta love the engineering that goes into landspeed racing!!!!!.

Very cool

Another great video, Matt! Many thanks for all your hard work. I’m currently building a Lotus 11 but my Mk 2 will definitely be electric powered!

Very cool video . . .