has anyone here tested straight away peak gps speed or lap times or otherwise for improved aerodynamics (or very effective duck down and tuck) and seen any improvement?
thinking mostly in shifter karts given higher speeds but faster tag X30 or even Ka100 I think on some of the bigger 700 foot type straightaway tracks could show some impact?
I can say when the wind is blowing strong as a headwind down the straight at our local track in Sonoma I can see a 1-2mph difference vs no wind with peak mph of ~72mph but i’m not consistent enough yet to know what that means on lap times
just looking at all the latest bodywork setups coming out, between OTK and others and clearly they’re focused on aero, and then I remember an article on Tkart saying radiators had better aero when stood straight up so the air flowed right through vs stacking up against angled radiator fins, which makes intuitive sense to me just looking at it.
just curious if everyone thinks all this latest focus on aero is pure marketing hype or any data at all to back it up?
There could be something in it, given how manufacturers are pursuing it now. But my experience so far is that it isn’t worth a lot. As noted in the above thread, I tested the M6 and M7 fairings back to back when they came out and the data trace was identical between the two. No difference in speed or RPM at all, on a long straight at New Castle in KA.
I was always wondering about the tuck. The youngsters can tuck to the point their seatback is visible. I would think that defeats the purpose of a tuck as the air is going to move over your head and down your back into an air dam created by the seat. A slight tuck may have a some benefit but who knows for sure?
As a middle aged man wearing a helmet mounted go pro, my tucking is supremely ineffective and somewhat ridiculous looking as each time, the gopro smashes into the faring. At the top end, even of a rental, you can feel the air resistance, so I bet aero could help.
James, I agree with the hunker down rather than tuck. Works better for my fat profile. Now a kid on our team tucks so far we’re pretty sure he’s got his head on the bottom of the steering wheel. I lost that kind flexibilty a long time ago, and he’s about 6’
I have heard this but then there was an article in Tkart I believe where newline mentioned you want the radiator flat to the air so it can flow through smoothly for best aerodynamics because as you angle the radiator the air hits the fins and doesn’t go through the radiator anymore which I read to mean that a radiator flat to the air is like swiss cheese and full of holes but when angled down it becomes more like a wall for air hitting it as the air build up on the front of the radiator in a boundry layer
Knowing the radiator is going to be mounted at an angle, I don’t understand why the manufacturers don’t angle the cooling fins? Aside from myself, the radiator is the largest surface not designed to flow air around itself, but rather through it. By having the fins at an angle, you are essentially deflecting a portion of that air flow up it’s face. It is wasted surface area and weight in a vehicle that is supposed to be as minimalistic as possible.
It makes no sense.
I recall someone on here having access to wind tunnel testing equipment. I wonder how difficult it would be to set up an experiment comparing radiator angle with air flow percent through the cooling fins versus thermal efficiency for a given angle. As a secondary measure for effect of wind resistance for the given angle its mounted at.
Those parts are probably not kart specific. I suspect they are commercially available put together in a way to become a kart radiator. Probably not nearly enough market to tool up for kart specific fins