Guess you never saw the movie Hot Tub Time Machine hehe. It's something fleeting,unattainable,or something/someone that got away from you. Say a record of sorts lol. Heck even wind is a great white buffalo sometimes

Yes, this wind sport is chock full of the fleeting and unattainable. Chase it we will.

Mine is to be flying and max out what the kite is capable of. Just at the edge of fully powered yet not over the top. I had it last fall on Jekyll Island riding with Angus. 8.6 Reactor II screaming in the wind with 3 tires breaking loose with little gusts. Hitting around 30+ in 10-12 mph winds and the kite seems motionless at my side. But we are far away from talking about atb speed records now. Back to our regularly scheduled program! :wink2:

I woke up thinking about this.

I think I need to get a board.

and lots of impact protection! Trust me ,wiping out from a stand up position is brutal!

I keep telling myself I really need to get some racing leathers. The playa was unforgiving at 30 standing up (cracked my snowboard helmet)

Don't worry, I have the armor front covered.

Quote:

Originally posted by Feyd I woke up thinking about this. I think I need to get a board.

I believe that Bob Childs has the top speed of 50? mph on Doom Wheels. Now these are speeds you want to go off season. NO ? Have you ever thought of fashioning a set of those up ?

I think I would incorperate bindings if I was making a set ?

I actually just bought a pair of roller blades from the second hand store today to make some in time for nabx

Anything 50+ would be nuts.... Anything over 30 and I start getting the heebie jeebies lol

Hit 41 the other day and no lie, 40 plus on a dirtsurfer is so smooth, I thought I was doing maybe 30. When I hit 50 all I wanted was more speed, not one speed wobble!

That's because it's 2 wheels! Do ever get speed wobbles on a bike? 2 wheeled things gain stability with speed and 3+ wheeled things lose stability with speed. Simple physics.

Quote:

Originally posted by ikemiester That's because it's 2 wheels! Do ever get speed wobbles on a bike? 2 wheeled things gain stability with speed and 3+ wheeled things lose stability with speed. Simple physics.

Gotta help me understand the 3 wheel wobble theory. I've had physics.

2-wheeled speed wobble...:wee:

I had that happen to me once,but I did not go down. Some jerk brake checked me on the interstate! I have had speed wobble at 135 mph once on my FJ 600 ,caused by micro tire imbalance. So ,yeah you CAN get the wobbles on 2 wheels.

Lol how a dirtsurfer works isn't news to me after 5 years of show & tell, I was just praising it.

And someone really should've told that hit on the bike that he was on two wheels and shouldn't have fallen,simple physics :D

and I quote from dirtsurfer, "The Dirtsurfer's unique inline design completely eliminates speed wobbles that are so common in skate truck systems." The reason that motorcycle got speed wobbles was because he turned his front wheel slightly too much. Correct me if I'm wrong, but a dirtsurfers wheels don't "turn" therefore rendering it incapable of a speed wobble

that guy in the motocycle video didn't simply get speed wobble, i saw that on tv and one of his shocks broke causing the wobble

Quote:

Originally posted by ikemiester and I quote from dirtsurfer, "The Dirtsurfer's unique inline design completely eliminates speed wobbles that are so common in skate truck systems." The reason that motorcycle got speed wobbles was because he turned his front wheel slightly too much. Correct me if I'm wrong, but a dirtsurfers wheels don't "turn" therefore rendering it incapable of a speed wobble

The front wheel on a dirtsurfer does indeed turn. They are incredibly stable at speed though. The faster you go, the better it runs. I think skate trucks wobble at speed because of the way they pivot on the king pin, the way one wheel moves forward while the other moves back. Something causes the truck to turn, thereby changing the balance of the rider which causes the truck to turn. this goes on till it gets worse when there is a spill or speed is reduced.

I love to debate as much as a pig likes rolling in mud. I'm still curious about how adding a 3rd or more wheels to a vehicle makes it unstable. I haven't found a speed that my 3 wheeled Ivanpah buggy gets unstable yet. Having taught math at a community college and taken physics in college as well, it doesn't seem as simple to me as you make it out. I'm not saying you're wrong, but just want you to explain your reasoning so I understand your viewpoint.

I was incorrect earlier about bikes not speed wobbling. I found what seems to be the true answer for why a dirtsurfer won't speed wobble. Here's why

"It should be noted that the Dirtsurfer will never experience a speed wobble normally associated with other bikes or board sports. Because all of the weight is below the hub of the wheel and pulls down on the hub as opposed to pushing down actually changes physics."

On my longboard skateboard I've hit 50mph... tracked by a car downhill.

It has to be possible to go faster with bigger wheels and wind propulsion... just probably crazy dangerous.

Honestly... i'd be terrified... I've always felt more in control of my skateboard and water based kiteboard than my mountainboard.

good luck if you are trying.

PS... on a skateboard when downhilling... lean forwards and place much of your weight on your front foot to help eliminate speed wobbles. unfortunately it feels counter intutive for kiting.

in the last few months, we have tried to gather information about speed wobble. You can see some of it on Flexboardz.com/Technicz and as it's quite a lot of maths/physics involved, we have summarized part of it in the video below.



basically everything can wobble, the question is how fast it will happen?
Skate/mountainboard trucks with 2 rigid steering axles are very wobble prone even at normal speed...other designs have to go much faster.
It seems that the rear truck is causing a lot of instability (try driving a car backward) that is why longskaters recommend to lean forward on the front truck(to be less perturbed by rear truck vibration)...that is also why Outback and other board w/o rear truck are more stable

Recently, we have been contacted by Simpack, specialist of the vibration analysis, and they have proposed to make a vibration study comparing a skateboard and a Flexboardz.
Simpack software use CAD files of the board to simulate the vibration.
Considering SimpacS-P-A-M-L-I-N-K-s expertise of these problem, I am optimistic that they will give a valuable explanation to the wobble problem

I wish you could get your hands on a Quadrolution to throw into the the analysis mix just because of the inverted truck geometry.



Would make for interesting, albeit geeky, reading.

ATB,
Sam

It's still a skate/mtb truck design (with rigid steering axles)...with a lower center of center of gravity and a reduced pivot angle (from what I can see)...so it has probably a similar behavior but at higher speed...

However, your point is right : there are so many different set up that it will be difficult to give a definitive answer to the wobble problem

Quote:

Originally posted by flyjump I think i would have to setup a different board for speed challenges. my board is too flexible and i have skate style trucks for quick turns. I think i would need a heavier board so that I wouldn't get speed wobbles. I'm curious to see how fast i'll be able to go. i'll see if i can borrow a gps at NABX as see what i can do

You need a beast like mine bro!

I did 56,4 m/hr last monday (91,2 km/u) see http://www.hanglos.nl/forum/310883/kiteforum-912-km-u-op-fly... for 2x gps log

Quote: Originally posted by Dennistak

I did 56,4 m/hr last monday (91,2 km/u) see http://www.hanglos.nl/forum/310883/kiteforum-912-km-u-op-fly... for 2x gps log

Congratulations. That's insane!! Have you made contact with popeyethewelder.com ? He might be interested.

Big cojones for going out in the hurricane!!!!!

I found it funny that you woke up early on Monday morning to explain to your board. I couldn't help but be reminded of Fawlty Towers. :D

http://www.youtube.com/watch?v=mv0onXhyLlE

Quote: Originally posted by indigo_wolf

I wish you could get your hands on a Quadrolution to throw into the the analysis mix just because of the inverted truck geometry. Would make for interesting, albeit geeky, reading. ATB, Sam

I have one of these if anyone e wants to try it at WW in the spring.

just saw this thread up in the rotation. i did some decent runs on FlxBz haize last year ...gps had at 51 or so i posted on extremekites , AUS and got into the thread on kite crowd but lost interest..

hi speeds on haize was pretty effortless compared to regular trucked board. regular ATB over 35 mph just gets super sketchy + the wind u need is pretty hi for hi speed land rides as well.

with haize you can cruise 40-50 no big deal..the issue around doing more for me were 2 things...

first was tire growth(so it seemed)..the soft tires start growing as speed goes up and somewhere around 50-60 its just total sketch for the set up i had ...maybe some heavier belt tires, could have been the float over the wet sand but anyway ...higher speed for the board really is not the problem .

and the second--->flying the kite at 50+mph in 30mph+ wind is what gets your attention, holy crap! JUST ONE pass to leeward at 50+ and only deep consideration for another one.

FLxBz haize (maybe with different tires/rims...like solid rim belted bazookas!) is truly the only ride to attempt this with and just plains nuts or guts to go with it....even fully padded a broken neck is a snap !

caution advised