Hyundai Kona electric dust deposition

[aerohead]

Be sure that Hyundai didn't intentionally 'engineer' the gaps to provide cooling- air to electronic heat-sinks behind those areas.
You'll be looking for anything attached to a raised, ribbed-aluminum structure, supporting a 'black-box', with a wire loom attached.
Power devices contain switching transistors and diodes which must expel heat in order survive.$$$$$$$$$$$$$$$$$$$$$$$

[caillou]

all electronic is watercooled and use the front radiator
I only sealed a 1cm panel gap at the front edge of the hood

[cRiPpLe_rOoStEr]

Originally Posted by caillou

I would like to remove the roof rails

Maybe it's not even worth to remove the roof rails. Do they provide a similar effect to the winglets on modern aircraft?

[caillou]

Rails are only negative according to what I heard, especially with a side wind which occurs the majority of the drives
On this forum, roof rack are studied, bars from side to side, but I didn't find a topic about rails from front to rear

[Phase]

Originally Posted by caillou

I'm trying a few aero mods on this Kona EV
- bluedrive side badge removal
- hood front gap with a seal inside
- wheel trim gaps covered with tape
- wheel spoilers size increased with tape

I would like to remove the roof rails but it's not reversible and the plastic covers are not sold on european websites, only US ...
Search for "kona limited roof rail removal" to see pictures
(can't post a link yet)

I also removed the subwoofer which is too strong and weights 4kg


rear

front

Larger wheel deflectors actually increase drag. Bigger doesn’t mean better.

https://aia.springeropen.com/article...74-021-00086-7

2021 study shows that bigger deflectors reduce wheel drag, but the INCREASE overall vehicle drag.

[freebeard]

The baseline DrivAer model simulated using WMLES with the coarse mesh took approximately 21 hours with 360 Linux processors.

I'll have to reread this after I've eaten, but it looks like what works at high speed doesn't work at lower speeds.

But ejecting engine bay air ahead of the wheels sounds interesting Porshe-like.

[Phase]

Originally Posted by freebeard

I'll have to reread this after I've eaten, but it looks like what works at high speed doesn't work at lower speeds.

But ejecting engine bay air ahead of the wheels sounds interesting Porshe-like.

there are several studies on the injecting air jets now. could be a future thing used in cars later on

[Phase]

https://iopscience.iop.org/article/1...4/7/072005/pdf

This study shows that the angled and slopes wheel deflectors work much better than the straight flat ones most cars use. Think XL1 and light year one/zero car or the front deflectors of a Tesla or Porsche taycan.

Also it looks like “ shutter wheel covers” would be a thing of the future. Like auto grill shutters. The wheels would be fully closed but if they need brake cooling, the shutters will open some gaps in the wheels. Very interesting.

[freebeard]

It seems like they could divert cooling air from something that isn't madly rotating.

[caillou]

Thanks for the remarks
On the 1st paper from Phase
it's not only bigger doesn't matter, it's even no deflector at all!
the reference [17] which can be downloaded with scihub, assumed that with a less aero shape of the car and higher clearance, deflector can be usefull
in the article, the comparison is only with and without deflector, but it doesn't say if a bigger deflector would be be better. The size may have been limited for design reason: too big, too ugly

On the 2nd article from Phase
increasing size is said to work but not too big. Study is with angular shape, and enclosed wheel

In the end, I probably made my deflector too big, I will cut some of the rigid tape