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Old 11-12-2014, 04:11 AM   #1
ere109 OP
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If I Were to Jump a House...

I've been laying in bed, unable to fall back asleep for two hours, and suddenly my brain started thinking up ways to tire myself out. Then it hit me: if I built a ramp, I could jump a house. It isn't just "trained" stuntmen who have the know-how to successfully jump and land a motorcycle. In fact, I would say that most of us have the necessary skill: every time we pop up over a hill and leave the ground, we're clearing the rooftop.
So I started plotting it out. With a good collection of 4x4 lumber, and some plywood, one could make a sturdy ramp. In fact, CLEARING the house truly is the easy part. Its the landing that would require some precision. First, the exit angle on the approach ramp would need to be set to level the bike out while it gave enough vertical lift to get over the peak. A good, even landing surface would have bike and descent ramp meeting at the same angle. Then there's got to be a recovery zone - enough stable, flat surface for the shocks to compress, open up, then settle, before the descent angle changes.
Then, of course, there's speed. Too much, and you risk overshooting the landing zone. Not enough, and your landing zone becomes the attic. One could always build a larger/longer landing zone. But that would be limited by both economy of space, and budget. I suppose, also, at some point in size, 4x4's wouldn't be strong enough to support the overall structure.
Given the various complexities, and potential side-effects, I've ultimately decided it would be better to start by jumping over a car. It's truly the same jump, using the same principles, but on a smaller, safer scale. I estimate a good approach ramp would be 12 feet - about the same length as the car, itself. The landing zone would have to be at least twice the length of the bike, although landing on a gentle downslope doesn't seem as scary, when only jumping over a car. Speed would be slightly less crucial, as well.
So who wants to test this theory? I may have different thoughts, after a good night's sleep, but I think it would be fun to try. We'd probably need around fifty 4x4s, and six pieces of plywood, plus a few dozen 8" lag bolts. I think this is doable, and would be a great winter project, that could become a major event in the spring. We've got months to plan it out and create buzz, so let's do this.
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Old 11-12-2014, 05:04 AM   #2
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You should do it, what could possibly go wrong.



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Old 11-12-2014, 05:18 AM   #3
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Old 11-12-2014, 07:36 AM   #4
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I'll adopt some 4x4s and lag bolts for the cause. ;)
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Old 11-12-2014, 07:43 AM   #5
plusone
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I assume your talking about the GS right?
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Old 11-12-2014, 07:44 AM   #6
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Sounds well thought out to me, do it! I'll watch, and make sure gravity is still working properly!!

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Old 11-12-2014, 08:00 AM   #7
ere109 OP
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Blake, everyone has heard of Fonzie jumping the shark, but that's the first time I've seen it.
I think I'll try it on my XR first.
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Old 11-12-2014, 08:32 AM   #8
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You would be stupid not to...
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Old 11-12-2014, 08:52 AM   #9
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You live on a corner lot.. you'll have to take into account approaching the pitch of the roof at a 45 degree angle.

...and remove a fence or two.

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Old 11-12-2014, 08:56 AM   #10
HellSickle
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I'll buy the wheelbarrow.




Have you considered trying Ambien?
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Old 11-12-2014, 09:10 AM   #11
Geek
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If you are going to jump a car first.. perhaps a car that lends itself to the descent like a beetle?
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Old 11-12-2014, 09:43 AM   #12
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Quote:
Originally Posted by Geek View Post
If you are going to jump a car first.. perhaps a car that lends itself to the descent like a beetle?
let him try the Sprinter
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Old 11-12-2014, 10:04 AM   #13
ere109 OP
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Quote:
Originally Posted by Geek View Post
If you are going to jump a car first.. perhaps a car that lends itself to the descent like a beetle?
Joel has a Beetle, and I'm sure he'd put his full faith in my abilities. Maybe his girlfriend could sit in the car for effect.

Quote:
Originally Posted by Blakebird View Post
let him try the Sprinter
Ed would absolutely trust me with his Sprinter and his wife. But that thing is a house.

Quote:
Originally Posted by HellSickle View Post
Have you considered trying Ambien?
Not a bad idea.

Do we have an engineer among us? Let's get some drawings going.
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XR600 rebuild http://www.advrider.com/forums/showthread.php?t=188797
XL600 rebuild http://www.advrider.com/forums/showthread.php?t=224984
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Old 11-12-2014, 10:08 AM   #14
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Many moons ago my brother and I built a BMX ramp. It was almost a quarter-pipe, but the top lip was not vertical, so you launched up high but could still clear a car-sized gap. The landing ramp was obviously crucial to have and our landing ramp took a beating because it had no curve to it. It was quite a hoot! I can't quite remember but I'm pretty sure we jumped over one of those VW diesel rabbit pick-up trucks (the short way).

We used a lot more lumber than we thought we would. If I were to do it again, I think I would use a stick welder and 1" mild steel square tubing. That would make it really easy to build and not too heavy to move around.
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Old 11-12-2014, 10:27 AM   #15
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Here you go, an instructional video...

https://www.youtube.com/watch?v=KDGyZrTq8OA

Should be much easier with an actual motor in the bike.
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