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Zachanadandy

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It's amazing people don't do the maths prior to doing this stuff. Math will tell you exactly how fast you need to be going at that weight and what departure angle....
And the math doesn't involve weight at all. It is 100% irrelevant as gravity effects all objects the same. A dirt bike launched at the same speed and angle will travel the same distance as a semi. That's why they said 45mph in the drivers meeting regardless of wether you were driving a light side by side or a heavy full body rig or anything in between.
High school physics refresher.
First, determine the initial velocity (v) of the car. Next, determine the launch angle (θ) of the car. Next, use the standard value for the acceleration due to gravity (g), which is approximately 9.81 m/s². Finally, calculate the car jump distance using the formula D = (v² * sin(2θ)) / g.
As you can see, weight doesn't matter.
 

GeneralMaximus

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And the math doesn't involve weight at all. It is 100% irrelevant as gravity effects all objects the same. A dirt bike launched at the same speed and angle will travel the same distance as a semi. That's why they said 45mph in the drivers meeting regardless of wether you were driving a light side by side or a heavy full body rig or anything in between.
High school physics refresher.
First, determine the initial velocity (v) of the car. Next, determine the launch angle (θ) of the car. Next, use the standard value for the acceleration due to gravity (g), which is approximately 9.81 m/s². Finally, calculate the car jump distance using the formula D = (v² * sin(2θ)) / g.
As you can see, weight doesn't matter.
So if you’re not going to pay attention during the drivers briefing, then at least bring your ti-82 to the track!
 

Zachanadandy

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So if you’re not going to pay attention during the drivers briefing, then at least bring your ti-82 to the track!
Or watch anyone else take the jump, ask them the speed they hit it at. Or at the least hit it faster than you think you need to. Flat landing the other side would suck... but not as bad as coming up short.
 

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Rusty PW

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That's a bad day at the office.
 

ecidiego

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And the math doesn't involve weight at all. It is 100% irrelevant as gravity effects all objects the same. A dirt bike launched at the same speed and angle will travel the same distance as a semi. That's why they said 45mph in the drivers meeting regardless of wether you were driving a light side by side or a heavy full body rig or anything in between.
High school physics refresher.
First, determine the initial velocity (v) of the car. Next, determine the launch angle (θ) of the car. Next, use the standard value for the acceleration due to gravity (g), which is approximately 9.81 m/s². Finally, calculate the car jump distance using the formula D = (v² * sin(2θ)) / g.
As you can see, weight doesn't matter.
Dirt bike vs semi no way. You're ignoring air resistance in flight distance calculation as well as suspension loading on ramp hit which will drastically change the launch angle.

Take an identical Jeep, except a much softer suspension on one.....hit the ramp same speed. Flight angle will change on ramp exit due to compression.

Anything else Professor? Your argued physics in a vacuum.
 

Zachanadandy

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Dirt bike vs semi no way. You're ignoring air resistance in flight distance calculation as well as suspension loading on ramp hit which will drastically change the launch angle.

Take an identical Jeep, except a much softer suspension on one.....hit the ramp same speed. Flight angle will change on ramp exit due to compression.

Anything else Professor? Your argued physics in a vacuum.
In a mx style ramp sure, on a ramp such as this, long and gradual by comparison, your dirt bike won't see any suspension loading. Wind resistance on a 20' jump at 45mph? Even in my extreme example of dirt bike vs semi you might see a few feet difference at most from this ramp at this speed. Sure if you're trying to make a 100' gap then wind resistance will matter. Again, any koh racer from sxs to gladiator could have safely hit THAT jump at 45mph and landed on the landing ramp period. Sure if you hit it in a Cessna at 45mph, you won't land on the landing ramp either?
 

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Thomas Nace

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Fabtech Motorsports

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Was able to catch up with Jim and Barb out there.
Banged up, but OK otherwise.
As mentioned, they weren't aware of the gap, they thought it was a table top. Nothing on the race map to indicate the gapper.
The goal (we will see) is to get one more race out of this JT.

Matt
 

drexotic

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DOH!

THAT was TWISTED!
 

KevinM60

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Was able to catch up with Jim and Barb out there.
Banged up, but OK otherwise.
As mentioned, they weren't aware of the gap, they thought it was a table top. Nothing on the race map to indicate the gapper.
The goal (we will see) is to get one more race out of this JT.

Matt
The repair project would be a whole other thread by itself.
 

MSFTMatt

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Is there video of a JT actually making the jump?
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