Laser Propulsion - Scientific Discussion (Engine is real!) +New poll!

[RACECAR]

Realistically, on a non-wheel driven car, I'd expect four-wheel steering, so in corners, you could point the jet at an angle, giving you even more lateral Gs. Don't know how you'd model the control of that with a racing wheel. You'd need to map it out to the Dual Shock controller... One stick will control the angle of the jet, the other controls the steering. On the wheel, if you have paddle shifters, you can use the paddles to turn the cone sideways.

Or maybe you can use the wheel itself to point the cone while the Paddles are used for steering the wheels.

 

[ViSiOGT]

IRegarding thrust, the car physics is not setup to receive such a force in a sensible way - see rollover physics and the rideheight / rake downforce speed exploit. Really interested to see how they sidestep that.

I did a search with "rideheight / rake downforce speed exploit" didnt turn up anything, do you have a link?

Or maybe you can use the wheel itself to point the cone while the Paddles are used for steering the wheels.

My guess is s Drive by wire similar to fly by wire where they take the drivers inputs vehicle speed and use this data to manipulate the controls to achieve the drivers desired outcome.

 

[Griffith500]

I did a search with "rideheight / rake downforce speed exploit" didnt turn up anything, do you have a link?

No link, sorry. But it was common in GT5 time trials to raise the rear of the car to rotate the downforce vector backwards and provide noticeable thrust. I'm no aerodynamics expert but that sounds wrong; I assume it's still the same in GT6.

My guess is s Drive by wire similar to fly by wire where they take the drivers inputs vehicle speed and use this data to manipulate the controls to achieve the drivers desired outcome.

Exactly this. Tourist Trophy already has it in its "riding form".

Most hypercars of today do it to a huge degree. Aircraft even more so.

 

[Aphelion]

Because I'm a nuts and bolts person. If you don't like discussing why this is or isn't possible, why do you care that we do?

I don't care though... Hence the friendly smileys...

 

[ViSiOGT]

No link, sorry. But it was common in GT5 time trials to raise the rear of the car to rotate the downforce vector backwards and provide noticeable thrust. I'm no aerodynamics expert but that sounds wrong; I assume it's still the same in GT6.

My thoughts are in GT a regular rake always generated drag with a little bit of downforce, reversing the rake always reduced drag trading downforce for lift taking advantage of the GT anti Porsche LeMans Flip aspect of GT coding also used to make GT4 wheelie cars hit near 400mph. When the Wheelie cars front wheels lift the loss of rolling resistance of the front wheels & increasingly reduced drag allowed the crazy speeds. The front and rear wing used to control the cars pitch when riding 2 wheels.

 

[niky]

Regarding thrust, the car physics is not setup to receive such a force in a sensible way.

Treat it as a hundred collisions a minute (or whatever, depending on the pulse rate of the laser) with an unseen object? That will be fun.

I don't care though... Hence the friendly smileys...

Says the person who's come in here to tell people he doesn't care, over and over again.

If you don't care and don't want to participate in the discussion, then there's no need to clutter up the thread with your not caring.

Or maybe you can use the wheel itself to point the cone while the Paddles are used for steering the wheels.

I'd prefer finer control over the wheels than the vectoring thruster. One solution that presents itself is using the pedals like helicopter pedals... to control sideways rotation... but then where would you map the accelerator and brake...

-

Paddles should do, I would think. Since even with sideways thrust, the car won't go sideways (ideally) unless the wheels are pointed the right way.

Imagine what drifting would be like with thrust vectoring and four-wheel steering, though...

*real drifters* - "It isn't drifting!"

 

[sk8er913]

I think it has many sides. As mentioned, no ramp up so similar to electric motors all power right off the line to the top but without the mechanical moving parts usually required weighing down the vehicle. With the addition of thrust vectoring upwards to push the car down on the track like downforce. They are using a "Winged Suit" style I also find interesting and reminiscent of "Rollerman" & using 4 wheel steering I predict this will recreate the angles of attack Rollerman hits the corners in, further enhanced with with the variable wings manipulating downforce and vectored thrust.

Like flying inches above the track.

That looks like fun

 

[Aphelion]

Says the person who's come in here to tell people he doesn't care, over and over again.

If you keep quoting me, I'm going to keep coming back. I am only replying to this thread because you are quoting me. For no reason might I add. I have the obligation to defend my point of view every time you quote me; it gives me an alert, I read the post, I fail to see why you quoted me, I restate my original argument. Seriously, all i said is 'I don't care' if the car is ridiculous, my opinion, and you quoted me, so I defended my point (albeit in an unorthodox manner). What is the problem here?

 

[ViSiOGT]

That looks like fun

Looks like the X2 (putting aside propulsion) will be a very close experience but powered to bring that next level to it.

 

[sk8er913]

I can imagine a generator running off of the air coming from the cone, trimming off any wayward air not going in the direction of the thrust. GM is being maddeningly unspecific here. You could even use the Air Generator and selective damping of the cone output for thrust-vectoring.

So like the turbine in a conventional jet engine?

edit: where does it say they are in the prone position?

 

[niky]

So like the turbine in a conventional jet engine?

edit: where does it say they are in the prone position?

Sort of... like a turbine generator...

RE: driver position:

http://www.autoblog.com/2014/11/19/chevy-chaparral-2x-vision-gran-turismo-concept-la-2014/

So a lot like the Nike One, actually.

 

[SJC ALPHA]

cable was only there to direct it due to winds etc and to stabilize the laser on target ... trust me i cant find the video but the lift was only a box no mechanisms in there the bottom was covered in a tinfoil type of dooo da laser pulsed the box up litrally firing at the bottom ... the cable it essential for accurate deployment other wise it be a laser missile ... it has nothing to do with cable weight its all to do by laser power if the laser has to lift it through our atmosphere . the cable is kept in a stationery orbit , space has no gravity but planets do. it was all about pulses not a constant laser ... think of it as a pulse jet amazing power but in short burts

I also have seen something along these lines where a laser was pointed upwards, an upside down cone shape with a lip was placed in the beam and with pulses fired upwards, the overhanging lip of the cone is to trap the light beam. This was small scale so do not know how it will translate when scaling up, I seem to recall James May from Top Gear did a film some years ago about this.

 

[MatskiMonk]

Yup, drive by wire it will be, turn the wheel left, the car will go left, right, and you'll go right... the car will figure out what does what.

Edit: Nitromethane with Rocket boost would have been my poll answer.

 

[sk8er913]

Sort of... like a turbine generator...

RE: driver position:

http://www.autoblog.com/2014/11/19/chevy-chaparral-2x-vision-gran-turismo-concept-la-2014/

So a lot like the Nike One, actually.

That seems like a bad idea lol (prone driving lol)

When I heard "air powered generator" I thought of a Hydrogen powered engine, but yes a turbine actually makes a lot of sense but then it decreases the efficiency of the thrust too :\

Yup, drive by wire it will be, turn the wheel left, the car will go left, right, and you'll go right... the car will figure out what does what.

Edit: Nitromethane with Rocket boost would have been my poll answer.

Unless... It doesnt actually need a driver... O.o and theirs just a person in there, just cause.

 

[ViSiOGT]

I like the demo

 

[niky]

And se we're firing this enormous laser beam up the lady's bottom, and it makes the car go faster...

Uhh...

Damnit... all the proper memes have been used, already.

 

[ViSiOGT]

And se we're firing this enormous laser beam up the lady's bottom, and it makes the car go faster...

Uhh...

Damnit... all the proper memes have been used, already.

Methane Gas propulsion, the laser just triggers ignition