New design for KOH

[Quicktimederby]

Well I built two new cars for the KOH not for sure if I will be using them. My PS and SPM are both lead cars, I wanted to build a couple for tungsten cars. I will post a picture of them tomorrow, keep you guys suspense for a little while.

It is a different designed than I have ran before, I hope it pays off!

 

[Obsession Racing]

Nothing wrong with some fresh blood in there Quicktime....I am trying to work a new car or two myself, but still waiting to see the results.

It's always suspenseful, as sometimes the new stuff doesn't run as fast....but sometimes it does!

Good Luck!

O.R.

 

[Quicktimederby]

Yea the good thing is that I still have the old ones that are running good. But I am really liking these new cars, and will be sad if they don't work out. SPM is painted and ready for weight. The PS is primed and ready for paint. I wont even get a chance to run them till Fri. once I get up to John's. I have a feeling its going to be a long night!!!

 

[Quicktimederby]

Well heres a few pic's. They look better in person. I hope they work out because I do really like the design.

 

[derby freak]

Those look like some very well built cars QT and very nice designs. Could you post some 360 degree close ups?

I have to say those cars even look fast.

 

[Quicktimederby]

I am just using my camera on my phone so the quility isnt the best. But I will see what I can do.

 

[OPARENNEN]

Thats an interesting design. I like it. Areodynamically, you may be on to somthing. The venturi principle says that as air speeds up, pressure deminishes. If your design works, it means the cars weight should decrease, because the pressure would diminish at the top, but the momentum would stay the same. Should make the cars momentum on the flat decline slower, thus faster times. The only thing I am wondering, is whether the design on the bottom of the car would negate the venturi principle. Maybe some of our engneers can weigh in on this question.
OPA

 

[Quicktimederby]

Here's a few more.

Opa. I have seen a few cars with a similar design that I was impressed with the way they ran. But as I have learned this past year some things that make sense, don't work and others that don't make sense, do.

 

[Quicktimederby]

The SPM is the same design minus fenders and the body is a little narrower.

 

[derby freak]

Very nice QT, can't wait to see that car run.

 

[ninjarabbi1997]

Nice paint and fenders!

 

[Quicktimederby]

Thanks guys. The body with paint, wheels, and axle it weighs 1.1ounce. So I am looking to get pretty aggressive with the COM. The two lead cars I have left are very conservative. John is making some new shoes for it so I wonder what color he's going to pick?

DF, if you see it in the line up for the KOH, you'll know it will be a 2.97X car.

 

[Kinser Racing]

Nice job Joel. The only way to know is to run 'em. IDK how well the venturi principle works at 12.5 mph but it's interesting. The issue with what we do is it's trial and error. Not much has been done in the study of aerodynamics at these relatively slow speeds.

 

[Quicktimederby]

We will find out Friday. Even though the cars are only traveling a 12-13mph do to its relative small size, it would be interesting to know if the scale speeds and aerodynamics really do have an effect? Someone who is much, much smarter than me would have to answer that. I will just test and than go back to the drawing board.

 

[derby freak]

I'm not the sharpest knife in the drawer, but I do know that aerodynamics does have an effect on the speed of pinewood derby cars. If you want to check it out, build a car like most pro derby racers build and then build a school bus derby car and see which crosses the finish line first. I know that more would come into play here than just aerodynamics, but I think that anyone that was skeptical about aerodynamics having an effect on a car would soon find out the thinner you build your car the faster it goes to a certain point until the margin between speeds got so close that it didn't matter anymore.

 

[Quicktimederby]

Yea I think it plays a bigger part than we think, especially when we are trying to find those last few .00X. In fact I remember someone putting fenders on a mod car?!?!?

 

[Kinser Racing]

You're definitely correct Freaky. I was just saying that in terms of the study of aerodynamics, slower speeds aren't really focused on.

 

[derby freak]

Yea I think it plays a bigger part than we think, especially when we are trying to find those last few .00X. In fact I remember someone putting fenders on a mod car?!?!?

Who is the idiot that would do something like that?

 

[Kinser Racing]

Yea I think it plays a bigger part than we think, especially when we are trying to find those last few .00X. In fact I remember someone putting fenders on a mod car?!?!?

Who is the idiot that would do something like that?

We don't remember his name. I don't thing he races anymore./images/boards/smilies/crazy.gif

 

[derby freak]

If I remember correctly I believe he named his car hornet or something stupid like that.