Al's Ngen might be fast but i have found something to beat it...

www.gizmag.com/us-office-of-naval-resear...netic-railgun/11035/

not sure if i can mount to a buggy yet

you would still loose... the recoil would send you backwards at mach 5...

Unless you turn it around the other way... fire backwards and beat him at mach 5!!

come to think of it you better have 2.... one on each side of the buggy.

naa, dont be daft man....you would need something like this to keep up with me. :twisted:

Great Scott... 1.21 Gigawatts Marty!?!

I bet your buggy frame is not even rated as a shunt fuse for the powersupply to that thing! :twisted:

I couldn't even lift all the capacitors needed to store the energy we needed to accelerate a 0.5" alloy slug through a phone-book at 2 feet. Now imagine what you need to haul a decent artillery projectile a decent mile! :twisted:

Would I like one... hell yeah! Just need to let the Auckland city council know there will be a few more power outages. :twisted: :twisted:

thats an unreal amount of power...check this out.... 1.2 gigawatt = 1 609 226.510 9 horsepower [international]

just on this kind of note, has anybody tried to figour out how many kg of pull it takes to make a standard kitebuggy @ say 90/100kg total weight break traction sideways on firm sand....versus howmuch pull it takes to get it up to say 70kph
im very intrested in this and think its about time to test it out because itl be intresting to see how tyre pressure vs weight vs drag works.
im sure we could use information like that to get into the topspeed club.
who has an industrial fish scale?
i think the truth is im a bit skared of perrins method of going fast...ie/huge huge kite...more than half his weight again in ballast,5 wheels and 40knots!
im shure their must be a slightly more subtle way.

The 1.21 Gigawatts is a quote from 'Back to the future' where the doc explains what drives the flux capacitor. No idea how much energy it takes to lob an artillery shell by electromagnetic acceleration. However I can tell you it will be something more than you can safely do off the grid. I doubt it's all that practical compared to your standard combustion charge.

As for a buggy... well that is quite dynamic as the lift increases as you accelerate and the apparent wind to the kite is increased. While I don't as yet agree to the ballast principle I do agree with a larger wing AoA tuned to the conditions. A good hybrid or bow is quite a good power source for safely achieving the speeds we need.

To measure it I would be thinking loadcells, windicator, GPS and anemometers sampling to a ride-along laptop... it would suck all the magic out of it though! :?

i think the technicalities are what makes the sport more intresting and were all tinkerers an tweakers at the end of the day..what i want to do is find the right ballance btween kite pull/vs grip an the way to do that is to find out how much weight you can put on the buggy without increasing rolling resistance/adjusting tyre pressure to compensate...dont need a kite, just a car to pull and a kg scale.

Here it gets tricky as every kite behaves differently depending on conditions and tuning. A kite that sits well forward is less likely to overcome a buggy's sidegrip but at the speeds we're talking about most kites cannot overcome their inherent drag. Alternatively small kites have less drag but need a lot more wind for what we want to achieve. Enter the depower kite, shorter lines and its' ability to adjust AoA and you allow the kite to sit further forward for the same lift hence more pull but less loss to sidegrip.

A buggy's sidegrip is purely a factor of it's weight and the amount of rubber touching the ground. Increase the weight and increase the surface area and you increase the grip - at the cost of rolling resistance and inertia. It's all balance and on the day you're lucky if the wind cooperates.

Now if you want to get real progressive put all three wheels in line counterbalanced by your body weight. Like a proa. Steering is compromised but you're using the weight and traction where it works. Though putting your bum down at 100kph would ruin your couch privileges.

Dang... they beat Macquarie Innovation:
www.sailrocket.com/

when i'm next up someone should grab hold of my manta in 20 odd knots at take it for a blast on the buggy i recon yourd be HAUling with that beast.

Wacht out tho. zip it up to the zenith to fast and yourl be haul 80-90kph and flying into orbit at the same time.... hahaha.

thruthfully i recon it would be a good buggy engine being a fairly high aspect depower.

PS i want to know how many horse power a horse has. i'm shore its more than one horsepower.

Jimmy and I was doing this talk just a day or two ago,

and yes my boss has a loadcell

just need a van / ute and ski rope :roll:

and no cops :?

i just got a 1000w winch motor from work, i compared it to my old goped that ran about 1.2 hp...they are about the same ie, 15cc = 1000w =1.2hp....i think something like 780w is about 1hp....its all here..www.onlineconversion.com/

Haunebu 3

one of these should be faster, good for 7,000 km/h but with theoretically up to 40,000 km/h possible, a bit faster than the SR71 and pre dates it by 30 years too

we sure were talking about it a few days back Al,

We need the load cell , as many sets of different tyres as we can muster and a zero wind day, plus a compressor , tyre guage. And a mental guy to ride in the test rig. a mental guy to tow the test rig and some beach that is clear of pinkish animals. i believe the buggy needs to be moving to test it id say about 30kmph should be enough to "plane" on top of the sand and aproximate 80-100 kmph. I wouldnt want the mental guy to have any further brain damage if something went wrong. maybe 2 k's up toward the moose would be a good test ground ? i need that maximum force readout to help design the buggy frames , goose necks with some accuracy. it is my ultimte aim to not only design a front fork, but a whole buggy that will hold the force properly and be ultra stiff where needed. natrually you could already say that the two main lines were 170kgs each and the max force would be 340 kgs, but that wouldnt be as fun.

towing is not going to provide the sideways pull of the kite.

you need to do a true test and connect the load cell inbetween the kite and the harness. than and only then will the true reading take place.

then of course you have to repeat on every surface you use as the traction level is different on each one!

yea, id like to set something up between the kite an buggy...that would give us what we need. to test sideways grip you just pull @ 90degrees to the buggy with a van and see if letting your tyres down works best or more weight or whatever...then do it going straight forward and find how much rolling resistance has changed by.

i was thinking of having the pull point off the roof of the vehicle, this particular free load cell is not something you can put in your lap unfortunately. all you need to do is turn away from the car and do power slides eh ? or one vehicle towing and one pulling sideways by running parallel with the buggy and steering away gently. But i think a buggy running out one side of a car will work with the tow point off the roof rack, then just stear the buggy slightly away from the car. kind of the reverse of what usually happens but still equal forces in opposite directions.

make sure you have a very quick quick release system because i can see it going very bad very quickly.

From what I hear this specific brave yet possibly mental test-pilot known for his taste in algeal mud would consider the 'roll test' part of the whole experiment. Better to have the quick release on the vehicle end least you endanger the rest of the crew!

Anybody hoping to make use of this supposed yet to be seen weather system endangering the north island tonight and tomorrow. Better pick up some duct tape and fresh batteries for my GPS. Hope to see the blur of some brand new Blurs out there...

haha....not me mate, i took up buggying because mountaing biking was going to injure me beyond repair....buggying is safe :roll:
i use to ride the downhill and now i understand why my mother never came to the races.
rolling the buggy is not an option, i value my neck very much.
(assuming on hard sand) i figour if you fly the kite on the deck then how can you tip the buggy ?
if all the forces are (almost in line) the buggy will just slide ,
as soon as your kite starts to get higher you are unweighting the buggy (kitelift) therefor losing grip and also risk tipping the buggy as you now are introducing more of a turning force insted of a direct linnear pull.
of course all this only works on hard sand, but that is where were gonna be doing 100kph
besides, my ass is about 3mm of the deck anway, most of my c.o.m is below the axles :twisted:

Assuming the beach is homogeous and level which it usually ain't. Someone always finds reason to mess with a perfectly smooth beach. Especially them little diggers with their sand castles. :O)

I always got hurt more in soft sand than hard anyway... especially when going from hard to soft! But then I also never found it dfficult to flip a buggy. Must be another specialised skill!

to find out who has the greates traction and power you should have a tug of war. attach the strop between the buggies and both charge in the opposite direction he how gets pulled backwards looses.

or you could do a tractor pull.

have some object like a car and see who can pull it from point A to B the fastest.

or one of those skid things that rugby teams use that would be funny.

plummets been on the mushrooms again, iv seen thoes fields where you live!!!