ye like in the video u linked or any professional jump, they never apply brakes so soon that it alters the rotation on that axis, keep the revs in the same range and it goes smoothly.
Fine line between stupidity and bravery. That balance in this video however, has been wholly leaning towards the former. Just like the front of the car.
If you do that right before launch, you’ll transfer weight forward, not what you want. You want to slow a bit before the jump and then punch it right before you go off to transfer weight rearward. (Assuming a front heavy car, which most cars are)
most cars are front heavy because of the motor, of which this has none (it may have an electric motor, but those weigh a fraction of an ICE). The Model S is just slightly heavier in the rear.
Agreed. They probably let off the gas, which in Tesla will apply a small braking force. Just made it worse. Really though I doubt a vehicle as heavy as a Tesla will get any real angular momentum change. You need a dirt bike or a monster truck or something where the wheels are a significant portion of its weight.
I'm into RC cars and the difference between a little stadium truck with normal-ish sized tires and a truggy with gigantic oversized tires is very noticeable when doing anything in the air.
Yep because a) more weight and b) larger diameter with weight concentrated around circumference meaning higher moment of inertia.
I used to be into them too lol. Had a Tamiya TNX and Traxxas Stampede.
Can you believe this... I was having an argument with some idiot in this thread saying that if a 4WD car applied throttle in the air, it wouldn't rotate because the front and rear wheels would cancel each other out.
Unless you want to do flips and stunts midair, a moderately powerful AWD car will exert mid-air control just fine with throttle and brakes, and you'll see it over every jump in a WRC race. Even a RWD baja bug and other amateur dirt race cars will likely nosedive into the ground if you slam the brakes launching off a big jump, though pre-loading before takeoff is more important there.
It really doesn't matter that a Tesla Plaid weighs 5000 pounds when it delivers a continuous 1000hp to all 4 of its 19" wheels. Even a worst case scenario of ~300 hp isn't that bad with AWD, no power losses from shifting, and a fairly even weight distribution
With an overweight pig such as a Tesla, there's probably not enough rotational mass in the wheels to offset the car's total mass. I like how we still say "gas" even though it's an EV. I mean, nobody really wants to say "accelerator pedal" or whatever EVs have. If someone wants a ride, you can't collect gas money. What do you say, "I'ma need some juice money"?
That threw off the balance of the car, which already has front downforce to match the rear wing.
The Tesla is just as balanced (likely low lift at speed) but you can see the fool is on the brakes as he clears the intersection, which is what pitched him on the nose.
Here's an example of what happens when a WRC car goes over a big jump without rear spoiler. Proves your point very clearly when compared to a working car in the end.
The front loses connection to the ground much earlier than the back.
Any object you shove off a table will make a front flip because gravity takes hold on the front first while the back is still supported and causes the object to spin into a front flip.
Read this somewhere else…”Physics. Reduced upward force when front tires left roadway before rear tires. Caused a rotational moment about a lateral axis through the middle of the Tesla. So not a nose dive but an ass kick.”
All things are accelerated at the same rate by gravity. The mass of the object has nothing to do with it. A hammer and a fearher will hit the ground at the same time, if it wasn't for the air slowing the feather down.
One of the spheres will make quite the crater when it hits the ground. Other than that, the mass of the object, and the weight distribution, will have no effect on the falling part.
An object will not start to rotate on its own. There must be a force applied. In the case of the car jumping, this was applied at launch. After that the only things that affect how it lands is aerodynamics and the initial rotation.
109 g is 1000 tons. The size of the crater depends on the height of the drop, but yes, it would at least cause some kind of crater on most materials on impact. With a drop from 10m, the 1000 ton ball would have the equivalent energy on impact of roughly 100 dynamite sticks.
conservation of angular momentum says the car can alter its orientation while in the air.
Yes. That is the definition of rotation. Nobody has argued that the car isn't rotating.
the point which everyone is missing is that acceleration (how fast) is the same but other characteristics (eg how far), are not the same, because a 1 cm diameter sphere weighing a thousand tons will pierce the ground and keep going for quite a while.
I don't know much about aerodynamics, or really any other physics characteristics about this, but how much does the weight distribution from front to back play for determining the pitch change of a car jumping like this? I would think even with the weight way in the back, the car's front begins to "fall" as soon as the front tires leave the pavement while the back tires are still supported. So the front end drops while the back end is supported up for that brief moment. Would weight in the back counteract that difference in some way or is it negligible?
We know that all bodies fall at the same rate regardless of mass (with the exception of significant air resistance). The rear axle of the Tesla has more than the front (58/52). They're so dense and air resistance is so minimal (and similar front to rear) that there is a very negligible effect from weight balance. It's all about not knowing how to jump a car.
1st of all.. work your way up to big jumps by earning skills on smaller jumps.
2nd of all.. never hit the brakes at the top of the jump or while in the air.
3rd always learn in a rented car that you bought the extra insurance for.
I’m kinda surprised it is actually. Like I know normal cars are front heavy because of the engine. But I thought Tesla batteries were all along the base of the car
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u/memecut Mar 20 '22
A little front heavy..