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Patrick0101

Member
Jun 11, 2009
161
174
Oregon
During the annual Tesla shareholder meeting, CEO Elon Musk announced that Roadster 2020 would have a SpaceX option package that will include rocket thrusters. Later, Musk tweeted a few more details: the thrusters won’t actually combust; instead, they will expel high-pressure air to give the Tesla an extra boost of acceleration. Industry experts and the...
[WPURI="https://teslamotorsclub.com/blog/2018/06/29/tesla-roadster-rocket-thrusters-explained-by-tesla-patent/"]READ FULL ARTICLE[/WPURI]
 
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1208

Active Member
Dec 22, 2014
1,372
917
UK
The op must be referring to the Speed Racer X Speed Racer X - Wikipedia from Mach Five - Wikipedia

as the Speed Racer X has

Button A, Aero Jack (エアロジャッキ Earojakki): Similar to the Auto-Jacks, but uses compressed air and rocket thrusters to propel the car into the air, rather than actual metal jacks (making "Aero Jack" a bit of a misnomer). Unlike the original series, this can only be used to make the car jump. This function actually appears in the original manga replacing the original Auto Jacks.
 
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J X 3

Member
Oct 19, 2016
197
145
Earth
They can take advantage of temp changes to some extent but that's clearly not the main goal.
And ofc the article ignores the fact that heat is generated when compressing the air.
Thermal management is the biggest issue with the system.
 

BioSehnsucht

Model 3 LR
Apr 1, 2016
1,791
4,812
DFW, TX
I know Elon is prone to hyperbole (among other hyper-things), but this patent is a loooooooooooooooooooooooooooooooong way away from any kind of "thruster" system for him to be talking about. Not even as some kind of "EV turbo cooler" that increases "thrust" thus being a "thruster".

An air bleed device for a cooling system is not there to give a boost in performance. It's to let the damn air bubbles out of the system! Unless you consider a non-functioning coolant system normal and a functioning one "improved performance".

A passive air bleed device would mean you wouldn't have to manually bleed the system after filling it - at least that's what I assume they mean. A system that automatically manages to get the bubbles to the highest point (where the resevoir would be).

It's normal to need to bleed the coolant on just about any car after changing it and sometimes after topping it off (if it somehow got real low on coolant). It's also common to need to bleed the brakes if they got too low on brake fluid (and sometimes when changing the brake fluid out entirely). Hydraulic power steering systems also can need to be bled sometimes.

Really, any kind of hydrualic system needs to be bled to remove trapped air from it, as so coolant systems. Trapped air reduces the performance of both, but for different reasons. For hydraulic systems, it compresses easily, so it affects the performance in terms of the ability to transmit power from one end to the other. For coolant systems, air bubbles don't carry heat effectively and can lead to hot spots and possible engine damage.

edit: Looking up the actual patent listed ... US9272595B2 - Controlling a compressor for air suspension of electric vehicle - Google Patents

Has nothing to do with any of this. It's related to air suspension!

Looks like the original article that was copy pasted to TMC from Cars With Cords: Tesla Roadster Rocket Thrusters Explained By Tesla Patent was making things up entirely.

edit 2: This looks like the intended patent US20180117498A1 - Passive air bleed for improved cooling systems - Google Patents

And yeah, it's just an air separator to remove air from the working fluid
 
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ka9q

Member
Feb 2, 2014
128
163
San Diego CA
This has to be a joke. Musk is prone to them and they can be amusing. Sometimes, though, he just doesn't know when to quit, as with his Spaceballs-inspired flamethrowers.

Anybody who knows basic physics knows how ridiculously inefficient it is to propel a car with rocket engines. It's something you do only when you need acceleration at the expense of everything else. And I do mean everything: energy efficiency, endurance, safety, reliability, cost, noise, you name it.
 
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Sertis

Member
Mar 31, 2016
28
16
Bay Area
They can take advantage of temp changes to some extent but that's clearly not the main goal.
And ofc the article ignores the fact that heat is generated when compressing the air.
Thermal management is the biggest issue with the system.
Just think intercooler after the turbo to cool the compressed air so it lowers the temperature before it gets stored. This system only operates on partial load, it doesn't contribute to heat soak in the motors or battery pack since they can place the intercooler anywhere.
 

J X 3

Member
Oct 19, 2016
197
145
Earth
Just think intercooler after the turbo to cool the compressed air so it lowers the temperature before it gets stored. This system only operates on partial load, it doesn't contribute to heat soak in the motors or battery pack since they can place the intercooler anywhere.

The Space X COPV is some 1.6m tall and 0.60m wide and replaces the rear seats. The max pressure it ca take is some 5500PSi so they need a much more serious compressor than a turbocharger.
 

rockinghorse

Member
Dec 6, 2013
8
0
Turku, Finland
Like Elon said, Roadster is using SpaceX's cold gas thrusters. These are powerful enough to maneuver 30-ton rocket with ease. BFR will also use these thrusters for maneuvering. Therefore they are providing Sirius impulse for lightweight Roadster! It is Sirius impulse!

SpaceX does not hold any patents, but it is more or less guaranteed that SpaceX tech about 100 km above the rest of the aviation industry. Therefore, this is not exactly old tech but it is very cutting edge technology that was never before available for the usage in a car.

This is something that Roadster could pull something like 5 g accelerations. Cornering requires precise computer control or else car literally flies away from the road. It is literally something, that if Tesla can make computer algorithms safe and accurate enough, Roadster could easily take-off and fly.

In the future, perhaps Roadster could fly as long as it has power in the battery!
 

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