Tracks

The Womp

dr_dodge Tuesday, 4/23/2024

For my testing on a rally track I built a launch womp, and bump all as one section

I used 1/4" plywood that had been leaned up at an angle in the garage. My shop is open, and with the humidity in Houston, it didn't take long and the board had a bow. It was then stood up straighter to force more curve into the bottom half.

4 - 2" + wide strips were then cut off of it,

then the 4 strips were glued and screwed together with stagered joints. Final finish is to paint it all with wood glue thinned with elmers school glue, and it's ready for final paint

The whole assembly is surprisingly stiff, but will need supported in a number of spots.
I will use this method to make some other humps and deep dips for the rally track.

(this is also how I make my train layout roadbases, except I use 1/8" thick underlayment)

www.youtube.com/watch?v=ZrMZFcPhPUQ

dr

Stoopid_Fish_Racing 4/27/24

I wonder if this curve is not the answer to the Whump...

Tautochrone Curve

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it's the shape you want. — dr_dodge
I also think that because weight is not involved in the calculation, you can place a testing timer at the end of the curve to see if you car can meet the theoretic max speed based on the gravity derived equation shown at 3:55 of the video... — Stoopid_Fish_Racing
Ooommpphhfff.....My mind just doesn't calculate like that.....I don't understand. — Dutch_Clutch_Racing
No worries... I was just looking for a way to calculate max theoretical speed of a car and then have a way to compare that to a measured run to see if the car was even close. The max theoretical only needs height at start and gravity. But since I don't like just dropping cars on the ground, I thought making this track section at the start with a timer would work. The curve is just the fastest route and since the calculation is already done, it would be a known before you started testing cars. The rest of the track is a long straight run... that is where the cars weight comes in... you can also calculate the energy of the drop by using a different formula to get the energy value in joules. https://newtum.com/calculators/physics/free-fall-calculator — Stoopid_Fish_Racing
Sounds like "SMART FISH"! Lol — Dutch_Clutch_Racing
you are too funny... not smart at all but I do like trying to figure stuff out so I spend a lot of time searching and trying to make sense of the things I find. — Stoopid_Fish_Racing
Also, Dr. Dodge's womp ramp got me thinking why would we not want the quickest drop and smoothest transistion from drop to roll out... — Stoopid_Fish_Racing
This is fascinating. The demo of dropping balls from different heights and the STILL meet at bottom at the same time! I just don't understand but it is fascinating. — Dutch_Clutch_Racing
if you apply the womp backwards it's (hopefully) a square rally jump, too. think ski jump for distance and a smooth landing — dr_dodge

redlinederby 4/28/24

Site manager

The curve...as I always called it, the Pinewood Derby curve...is the answer the whomp. I don't think there's much question there. My hurdle was always trying to engineer/build the curve so it was even/level/fair/quality so as to not be worse than the whomp, lol.

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agree, theory over execution — dr_dodge

Dutch_Clutch_Racing 4/28/24

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lol! — Stoopid_Fish_Racing
thats only half of it — dr_dodge

dr_dodge 4/28/24

shall we do curves next?

dr

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Lol — Dutch_Clutch_Racing
I am not ready for that! lol Still working on the straight line thing! — Stoopid_Fish_Racing
:P — ManiacMotorsports

LottaSpeedRacing 4/29/24

Thats cool!

Another cool thing is that white Dodge in front to the left of the house!

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The Womp

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