Irol, PM Me a number if you want to chat about Aerodynamics, far easier than Typing
Had a fair bit to do over the years with it upto and including F1 and group C stuff
Wooden Floors (Not strictly true) are actually Jabroc, which is an Epoxy based laminate of various close grained hardwoods, Its
Expensive as far as Plywood goes but a lot cheaper than Carbon.
Its used as a sacrificial skidplate.
You don't want a solid Metal skid plate mounted on a Carbon Tub
you want something that will take the initial hit softly and wear without dragging if it does touch down.
The Mercedes back flip was not caused by bumps, it was caused by the aerodynamics being wrong and therefore the car was far to pitch sensitive.
At speed the centre of pressure moved backwards
throw in a drop in the road surface and a centre of pressure by now well past the rear wheels and the car had no choice but to flip, it rotated around the rear wheels and then the air got underneath and made it worse..... they got there sums wrong
It happens, you are searching for that last 10th/sec and you sail very close, sometimes you get away with it, sometimes you don't ;D
As for Ground effects, nigh on ipossible on a road car just down to the clearances you need t o maintain in order for it to work.
Flat floor is good, will reduce drag,
Deep splitter/spoiler to divert air around sides rather than underneath.
Radiused rear of wheel arches or vents in front wing behind wheels to vent wheel wells.
Trick is always look at moving air from areas of high pressure to areas of low pressure, so High pressure in wheel wells (very turbulent also) to huge low pressure area just behind front wheels.
High pressure under very front of car to low pressure at rear of car, run your exhaust into the tunnels at the rear, the hot gas rapidly expanding into area of low pressure will accellerate the air under the car and drag it out with it.
The vertical fences in the venturis are designed to keep the flow attached, which accellerates it also....
There is lots more, if you really want to understand what is happening to the air around you as you pass through it, the best Budget way is lots and lots of wool tufts about 2" long taped on to the car all over. Use a contrasting colour
don't do it in the rain as it doesnt work
;D
Then drive along a straight bit of road, airfields are great as there is no traffic, with another car alongside but 2 lanes or more gap between you.
Other car has Video camera ;D
Film dancing wool tufts ;D take lots of stiff cardboard and Tank Tape with you to perform Mods.... spoiler extensions etc and see what effect it has on airflow.
Look at WRC cars now....
Look at the lower edges of the spoilers and splitters, look underneath them at the "Underbody protection"
Kaylan is wonderful stuff, makes great leading lower edges to spoilers as its flexible and really hard wearing, so you can run it low knowing its unlikely to rip the spoiler off if it grounds.
Same stuff is used from the flat floor joined on to the wishbones etc to smooth it out under there, flexible to move with suspension movement but smooth to airflow, sometimes these Protections hang down like mudflaps but they are quite thin so at speed they are designed to lay up flat iunder the car
;D
Like I say if you want to discuss it give me a number or drop me a PM and I`ll send you mine
Final Point.........
Raising the rear of your bonnet to aid Cooling will not work
;D
Just because lots of people do it doesnt mean they are right..... it just means they are sadly misinformed ;D
Phew..... Rev 9 war and peace post
;D
Cheers
Dom