Posted by JA
on December 16, 2008, 2:59 pm, in reply to "Re: Great view of Arc de Triomphe at Paris Hotel in Las Vegas"
Message modified by board administrator December 16, 2008, 3:11 pm
I don't know the answers to those questions.
As for #2, I hope he lands within the walls instead of some wall-to-wall platform, so he has some protection from falling off the side of the structure; just in case something goes wrong, he can at least fall off the side of the bike to save himself.
From my best experiences on big dropoffs, I had an uphill, ramplike launch at walking speed, and that gave me a nice feeling in the air. I was going very slowly off the top and slipping the clutch in 2nd gear, just to save myself a shift in mid-air. That clutch slippage gave me precise control over the power application to the rear tire's contact patch so I kept the desired traction and put the bike into a controllable flight with the right pitch.
Even though a horizontal launching platform would seem to be good, I found that a ramplike uphill launcher felt great and gave me a manageable rebound of the rear end. Without any rebound, the launch isn't quite so sweet. Even though that's true, I expect him to have a flat platform. The only reason I did it off an uphill, ramplike launch was that the terrain was shaped that way, so I had no choice. It was a blessing in disguise, because I wound up loving it. It felt SO good.
As for the distance of the launch ramp from the arc, that depends on the shape of the launcher and how long the launch ramp deck remains at its steepest angle. It needs to be close to its final angle, somewhat nearly vertical, for at least a distance of the wheelbase of his bike, to keep his forward momentum minimized so he doesn't carry too much speed across the roof of the structure. However, the angle can't be too obnoxiously vertical for too long, because he needs a certain amount of forward velocity to clear the near edge wall without clearing it by 30-plus vertical feet. If he does that, I hope he has a foam pit to land in.
It's advisable to get the step-up done, then stop and set up to do the dropoff jump. It's not going to be done in one continuous shot. The two jumps might not even be done in the same direction. He might have to jump back down in the direction he started from, or 90 degrees to it, so the hotel can maintain traffic flow on one side of the Arc de Triomphe.
He might travel on the paved roads perpendicular to the Arc's structure, perpendicular to the Las Vegas Strip, which would be heading West to launch to the top, so he might have to land on the roof the short way. That would mean a foam pit would be a great idea.
Then, he might have to drop off heading East, to head back down the road he came from.
As for the distance of the landing from the Arc, it depends on how slowly he launches, for one. The landing ramp might be extremely large and butted right up against the Arc, so the size of the ramp matters. It might be 30 feet away, but it all depends on the size and shape of the ramp, along with the speed he travels off the top. I just hope the landing ramp is not as tall as the Arc's roof.
JA
--Previous Message--
:
: Just a few questions you might know the
: answers to:
: (1) Will Robbie be jumping (in reference to
: the picture) left/right or right/left or
: top/bottom?
: (2) How much of a "lip", if any,
: will he have to clear on landing, or will he
: have a platform built on top that will be
: "open" on the ends and he will
: "simply" "drop" onto and
: ride off of.
: and
: (3) Approximately how much horizontal
: distance does he need between his launch
: ramp and the "Arc" and his landing
: ramp and the "Arc"?
: --Previous Message--
: Check this view out. Top view of the top of
: the Arc de Triomphe that Maddison will land
: on this coming New Year's Eve. I was jumping
: over the Eiffel Tower when I snapped it.
:
:
:
: http://www.westvegas.com/satellite_photos_of_vegas/PARIS.jpg
:
: har har - Google Earth. wink wink
:
: JA
:
:
:
Message Thread:
« Back to thread
