Interesting contest

If you have tyres with bite (I'm thinking sand tyres or badlands) & the water is reasonably glassy, I believe you have a chance. I'd tape over every hole & opening to be more streamlined also

I'd be accelerating from 1/2 throttle when you hit the water (this will keep the front wheels up & hopefully mitigate nosediving) & WOT FTW!!

Make sure you get video

The foff vehicles just floor it when they hit the water and they are 4wd, is the raze 4wd? If not I would think it's going down:lol:
Good point, you'll want to make sure the tires are sealed and any water can easily drain off the chassis. It might even be worth while making a belly plate, one that only leaves the wheels exposed. Drag is going to be the biggest problem.

Inspiration-

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Have you seen my Raze?
http://www.rc-monster.com/forum/show...highlight=raze
It is a bit different now. It has a body and mudguards. As well as a castle 2200 and airtronics high speed servo.

I am diggin the plate in the front.

That plate at the front goes all the way under. In his part 2 video he also fitted a kind of wheelie bar which also aids as a rudder.

Possible
 

Well I think the video kind of proves that it is surly possible. As you can see keeping control of the vehicle is key to accomplishing your goal. If you lose control even for a second you are doomed. I like the idea of using the air tires. That would help keep you afloat, and keep water from building up in the tires. Using a front slid would be a must to keep the nose from diving into the water on deceleration. Not sure that you would get as good of and accleration as the boat, but you could make a good showing for sure. The feet is possible, but beating the boat I believe is unrealistic. I would surly get your setup where you think it needs to be and make some test runs of your own just to see if you can handle the task at hand. Placing some kind of floatation into your setup would be most recommended so that your vehicle does not go submarine on you. That would not be too funny from an owner perspective:neutral:, but would make a very funny video for guys like us to watch:rofl:.

Wouldn't centrifugal force take care of any water in or near the tyres?

After making some test runs they would surely become waterlogged. Weight is obviously a key issue.

Not
 

NOT necasarily. If there is any way for water to penatrate the wheel/tire it will. If the tire is sealed and the rim has any holes in it for ventalation purposes water may get into the wheel and create an unbalanced situation with centrifical force. Anyone who plays with water toys knows that water will find its way into just about any weak spot and has the ability to reak havoc. You coud practically turn your vehicle into a boat type of vehicle and skim accross any body of water easily, but beating a speed boat may be a bit much to ask. Your only hope would be for him to lose control even for just a second, and then you may win the event.

I derive my income from water toys...I run a company that has several boatyards, a ferry business & a few other marine based businesses

I just don't get how water will defy physics & ingress a rapidly spinning wheel that is subject to massive centrifugal force...if you stop in a puddle of water or sink that's a different story but assuming you cross the water you should be fine - surely

Closed cell foam doesn't take on water, don't those wheels reno911's using have the closed cell type?

Yeh, possibly IDK :neutral: but it wouldn't take much water to throw the balance like Jerry stated. I've had tires balloon weird shapes but of course that was with standard foams.

I agree.
 

I agree that if there is any way for water to incroach, it surly will. I to have worked on water for many years (20+ years in the US Navy as a mechanic), and if there is one thing I have learned is that any opening that is not sealed will allow water to enter. Your assuming that he will only have one shot at this, and will not do any practice runs of any kind, or possibly come in contact with water prior to his speed run. Once this vehicle comes in touch with water it will for sure get into something. If any water enters the wheels it will throw things out of wack and vibrate like hell causing handling issues or maybe even break something.

I'm thinking it might go something like this

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Get a spool of 20Lb+ fishing line to put on a pole, make sure you have enough to cover the run. Let it free spool off the reel. It shouldn't add any resistance but if it does sink, you can get it back. Adding foam floatation to hold it up would add weight.