lara joyce   10 #37 Posted July 7, 2012 another post takes the downward spiral into pointless jibes Share this post Link to post Share on other sites Share this content via...
namtaB   10 #38 Posted July 7, 2012 another post takes the downward spiral into pointless jibes  You know what you have just done don't you ?  MOD NOTE: Any more 'bickering' will result in the thread being closed and public holidays being withdrawn....  :hihi:  IM ONLY JOKING MODS....   you are a lovely bunch really xxx Share this post Link to post Share on other sites Share this content via...
Goon   10 #39 Posted July 7, 2012 You know what you have just done don't you ?  MOD NOTE: Any more 'bickering' will result in the thread being closed and public holidays being withdrawn....  :hihi:  IM ONLY JOKING MODS....   you are a lovely bunch really xxx  I like you mate. Share this post Link to post Share on other sites Share this content via...
Goon   10 #40 Posted July 7, 2012 You are taking the ****, and wasting my time.  I know. You're obviously a very busy man with no time to waste on this forum at all... Share this post Link to post Share on other sites Share this content via...
Mmrraww   10 #41 Posted July 7, 2012 When I was out yesterday some idiot drove really fast through a road that was quite flooded and sprayed water everywhere I couldn't see a thing. What happened to driving slowly through it or not at all.  I'll be honest, depending which car i have to hand determines if i sometimes floor it through puddles.. I dont do it if others are around though. Just out of interest, were you on a bike or something? Share this post Link to post Share on other sites Share this content via...
DT Ralge   10 #42 Posted July 7, 2012 I'll be honest, depending which car i have to hand determines if i sometimes floor it through puddles.. I dont do it if others are around though. Just out of interest, were you on a bike or something?  "Floor it"? Wow, sounds fun.  What tread do you have on your tyres,though. What are you driving FWD, RWD, 4WD, tank? Have you tried it with cruise-control engaged? Do you accelerate all the way through or ease off (or is that "chicken"?) Are you choosing to do it on the straight, on a road with or without camber? How deep does the puddle need to be for real fun? At what point does it become less fun and more dangerous - have you tried it with muddy water in a ford, for instance - have you worked through all this or is it more fun when it is still a Russian Roulette moment. Why not make it real fun and take your hands off the wheel ... (don't try this at home, folks ...)  Maybe you fancy water-skiing, then? (A recent delegate's daughter claimed it wasn't her fault that hitting a puddle sent her through a hedge - maybe she doesn't have your skills of controlling your chosen vehicle through a puddle/ford/lake?)  Or maybe you are driving that tank and you just fancy being pulled for "driving without reasonable consideration for other road users"? (whether there are any pedestrians around or not, how does a PC know you wouldn't do it if there were some?) Share this post Link to post Share on other sites Share this content via...
Pinksarah889 Â Â 10 #43 Posted July 7, 2012 I'll be honest, depending which car i have to hand determines if i sometimes floor it through puddles.. I dont do it if others are around though. Just out of interest, were you on a bike or something? Â No I was in car, you don't bomb through deep water though if anothers cars going trough it opposite direction. Or may be thats just me lol. Even with wipers on fast I couldn't see. Share this post Link to post Share on other sites Share this content via...
Balpin   12 #44 Posted July 8, 2012 I dont think most of the posters have hit a flood on the road. It is dramatic. You need to be a good driver to copoe Share this post Link to post Share on other sites Share this content via...
Cyclone   10 #45 Posted July 8, 2012 The 'Onset of Aquaplaning' speed (in knots) is given by 9*(Square root of tyre pressure)(in psi.) Most car tyres have an inflation pressure of between 25 and 36 psi, so the onset speed is between 45 and 54 knots. ABS and traction control systems will help to reduce the effects of aquaplaning - but they won't make it go away.  If you drive on a road which has more than 2mm of standing water at a speed above the onset speed, you're chancing your luck.  That must be massively over simplified, it also depends on the tread pattern, and most importantly the width of the tyres and the weight of the vehicle. Share this post Link to post Share on other sites Share this content via...
Obelix   11 #46 Posted July 8, 2012 Actually it doesnt matter too much about the tread or tyre size - they do have some effect but this is fairly small. Share this post Link to post Share on other sites Share this content via...
Cyclone   10 #47 Posted July 8, 2012 Actually it doesnt matter too much about the tread or tyre size - they do have some effect but this is fairly small.  Is the pressure and the distance the water has to be pushed aside not important then? (Pressure being higher for a given weight if the tyre is narrower, and the water needing to move less far). Share this post Link to post Share on other sites Share this content via...
Obelix   11 #48 Posted July 8, 2012 Is the pressure and the distance the water has to be pushed aside not important then? (Pressure being higher for a given weight if the tyre is narrower, and the water needing to move less far).  A tyre will aquaplane when it goes fast enough that the water finds it easier to push under the tyre. This is easier with a softer tyre as it is easier to deform the contact patch - if you can make the patch larger it will lift off the surface and water will flow under it.  Essentially a higher pressure tyre will retain it's shape better and force water to flow round it - think of a road cycle tyre at 150psi on a wet road. They usually have no tread to speak of and cut through the water well.  Tread form, depth, and tyre sizes all affect how *much* water you can cope with - a tyre with good wet weather sipes etc will cope with much more standing water than a semislick dry race tyre, but when you have accumulated sufficient water to start aquaplaning the onset speed is almost entirely dependant on tyre pressure.  It's also worth noting that the speed is 9*SQRT(pressure) for a rotating tyre - for a stationary tyre it's about 7.2*SQRT(pressure). That's important if you are landing on a wet runway, but it also applies to a locked car wheel - if you brake while aquaplaning you will not recover from it until your speed has fallen considerably and there is essentially nothing apart from air resistance stopping you... Share this post Link to post Share on other sites Share this content via...