[KVRC] Khamsin Virtual Racecar Challenge 2016

[RicME85]

There used to be some excellent Sketchup modelling tutorial videos posted on this forum from back in the Formula Sketch days, things like how to design a sidepod and how to create an F1 style front wing from extruding the profile and manipulating it to follow two separate paths. I have tried to find them but not luck, I will however try again,

Found one of the videos, wasnt easy as 99% of things to do with Formula Sketch doesnt exist, I managed to find it hidden within a thread I started when I first started working with Sketchup back in Feb 2012. Its not the best video but it gives an insight into a Sketchup modelling technique that can be used for a number of bodywork areas (wings obviously, sidepods and engine covers).

Sketchup F1 Front Wing Element Tutorial - http://www.screencast.com/t/eAMypbaZC7c

Hopefully it will help some of the new guys to KVRC who struggled with their modelling for the pre-season race, especially with Variante's guide too (which I have read a few times and did essentially the same thing back with the KVRC F1 cars.

If that's the problem, maybe a few tips might help: http://www.sketchup-ur-space.com/2014/j ... tchup.html

[cdsavage]

The results for the pre-season round:

Code: Select all

Team                     Submission  Cd.A   Cl.A    CoP  Eng Int. Eng Exh. Cooling diff. Power    Time
---------------------------------------------------------------------------------------------------------
MantiumRAY                  full     1.47   7.72   1.600   10.5   -4.06     173.4      100.0%    372.20
JJR racing                  full     1.58   7.68   1.664   13.6   -2.81     48.53      100.0%    372.20
TF                          full     1.22   5.90   1.744   11.7   -0.68     134.4      100.0%    381.00
CAEdevice                   full     1.66   6.63   1.939   10.2   -0.47     46.35      100.0%    384.77
Competition Car Engineering intro    0.98   3.59   1.750   3.42    0.90     17.44      85.62%    397.41
TalnoRacing                 full     1.26   5.27   1.763   11.4    0.74     14.98      73.66%    397.82
Variante                    full     1.78   8.30   1.688   10.7    3.23     6.920      47.18%    403.08
RicME Motorsport            full     1.38   4.79   2.052   5.61   -5.85     12.56      63.66%    412.79
Kineuton                    full     1.37   6.30   1.176  -21.0   -0.24     12.07      55.36%    413.09
Pure Power Racing           full     1.81   6.37   1.713   13.9    0.75    -33.89      40.00%    421.95
Will                        intro    0.82   0.02  -445.1   5.51    1.62     107.9      100.0%    433.60
MercuryMotorsport           full     1.47   3.34   1.591   4.35   -4.59    -269.2      40.00%    435.97
HP-Racing                   full     1.53   3.61   1.773   15.0    0.01    -440.2      40.00%    436.00
Blindblom                   full     1.59   2.10   1.882   10.9   -4.95    -39.93      40.00%    445.04
sjns-Racing                 full     -      -      -       -       -        -          -         -

[/size]

[RicME85]

Wow, well done Mantium and JJR =D>
Well done to Machin too, solid performance showing the Intro class can be competitive. I wonder how many will switch over after seeing that
Variante's car suffering from a de-rated engine majorly! Good job it wasnt able to gobble loads of air else it could of produced a good lap.
Well done on the the top four teams for getting to grips with the new engine regulations.

...

Can you explain the headers and their figures please (specifically the eng. int./eng. exh./cooing diff.)

[etsmc]

Who out of the competitors took what option for the cooling in the full class?

Think i may have to switch to the option where you dont model the ductwork as i had what i thought were ok ducts but obviously not.

I have has a look at the car in paraview with surfacelic and there certainly looked like a decent amount of air was getting in there. Will try to get some images when i can.

[CAEdevice]

Congratulations to Mantium and JJR: df/dr ratio abve 5.0 with high df setup means that we will have to work hard this year.

JJR is promising, considering that the car is completely new (but Mantium is using the old car, so he can improve).

I am happy to see that many teams (TF, Talno, Kineuton, CompCar, Pure Power) reached a very competitve level.

Variante, after solving some cooling issues, considering that 2 or 3 races over 5 will require extreme df, will fight for the challenge.

About my team: I have to gain 1000N on the front axle. I have some ideas to test about it.

Thanks to Julien and Chris, as always, for their efforts.

@etsmc: I used opt1

[LVDH]

Wow, what a result - two winners. And I even like both cars. One a bit more.
The results table could use an additional column showing the cooling option.
I always wondered why the nice TF car could not produce better results but finally it happened, putting CAEdevice on his beloved 4th position.
As Kineuton and Pure Power Racing have nice and good cars but with some cooling issues they should be up in the pack next race. I do not think that sorting that out will be very difficult. The Talnocar will need much larger wings as soon as they get the cooling working.
But we all will have to hope that Variante sticks to his new design philosophy of chocking off his cooling. That 8.3 looks a bit scary.

Thanks to the KVRC team. I hope that all the issues you had with this test race will make the next one at least a bit smoother.

[CAEdevice]

putting CAEdevice on his beloved 4th position

You are right, another 4th place! It is a bit frustrating (also considering that it is equivalent to a 5th place, since Variante can easily improve), but I know wich was the issue with my car.

[Alonso Fan]

Poor sjns-Racing

Did they have an engine failure?

[LVDH]

Yes, he forgot to open the exhaust enough.

[variante]

I'm really impressed by the efficiency level reached by Mantium! He could race this car in the high efficiency rounds and still have good chances of victory! What I don't undestand is how he managed to keep last year's efficiency with much greater downforce, despite the fact the he could develope the car that much (as he said).

In general, I'm seeing a lot of competitive cars. Many of them just need to solve cooling issues in order to get very close to the top teams.

[LVDH]

I was very surprised by the car's numbers as well.
But the car is what I said previously. Mainly the last 2015 car but with the front and rear wing from the high downforce rounds.

What I do not quite get is how the clean and nice looking front end on the JJR car can create the levels of front downforce it obviously has. The car has almost my level of downforce but much nicer balanced.

The next race will be very difficult for me though. I bet in the JJR car there is much more potential for improvement as it is very new and I bet he has many untested ideas. Your car only needs better cooling. And my car should be at the end of development.

I think what everybody should see, esp. looking at the Competition Engineering Car is that cooling performance should not be sacrificed for downforce. His car does not have that much downforce but the additional power compared to the cars behind him did the trick.

[CAEdevice]

I think what everybody should see, esp. looking at the Competition Engineering Car is that cooling performance should not be sacrificed for downforce. His car does not have that much downforce but the additional power compared to the cars behind him did the trick.

I definetly agree. New cooling rules are a big step forward for KVRC, they made the designing much more realistic and interesting.

After seeing the numbers, I think that the perfection would be 2017 flows, no restrictions (or less restrictions) applied to inlet surfaces, same law to compute power, slightly increasing the safety zone (from 40% to 50%).

PS: Just for the record, ma car has some little not legal areas.

[cdsavage]

The cooling options: TF, MercuryMotorsport, MantiumRAY and HP Racing used option 2, everyone else used option 1. There were a couple of other entries that submitted the parts for option 2, but they were simulated as an option 1 entry (using the submitted cooling-intake and cooling-exhaust parts) since there were problems with the submitted duct geometry.

Poor sjns-Racing

Did they have an engine failure?

There was a problem with the simulation for sjns-Racing, Julien is trying to re-run it.

Can you explain the headers and their figures please (specifically the eng. int./eng. exh./cooing diff.)

Eng int. = Engine intake Pa.m^2 (power is de-rated when below 0 Pa.m^2)
Eng exh. = Engine exhaust Pa.m^2 (de-rated when above 4.5 Pa.m^2)
Cooling diff. = Cooling inlet Pa.m^2 - cooling exhaust Pa.m^2 (de-rated when below 20 Pa.m^2)

The rulebook still states 9.8 Pa.m^2 for the engine exhaust, I'll need to change this.

[CAEdevice]

Pre-season race is gone, what about the date of the next race?

[etsmc]

here is an image of my cooling intake using option 2. it appears as if there is air getting in there but apparently not enough.
is the issue, not the duct, is the issue purely because I am sending most of the air over the car?


how can I find out if the negative differential was an issue with the intake or exit??

results can be found here
https://mercurymotorsport.wordpress.com ... 1-results/