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Discussion Starter · #1 ·
similar to a magnet marshal , I created this to test downforce. This is my 3rd prototype. Its running with my code for a STM32 board and runs on a usb power source, so you can plug it into a usb batter pack if you need it portable. I also added screws to the bottom so you can have the downforce match a know scale like a magnet marshal as the pic at the bottom shows. All the non electrical parts are 3d printed and I plan to tweak a few things in my 4th prototype.

Packing materials Font Box Gadget Packaging and labeling


Vehicle Hood Light Motor vehicle Automotive tire


Hood Shipping box Rectangle Motor vehicle Gas


Rectangle Wood Gas Beige Fashion accessory
 

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Discussion Starter · #3 ·
Can you tare the cars weight so that the reading only shows magnetic effect?
yes, the 2nd pic is the tare weight of the car with no downforce.The orange button tare's the scale. The top pic is the full magnet downforce. in our club, TransAm era cars have a downforce limit of 150 grams.
 

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Discussion Starter · #7 ·
150g of magnetic downforce is HUGE!!!

...we have a 25g limit
we only have 1 magnetic track in the club at this time. we have 8 classes to race, 4 non mag, 4 mag.


Trans-Am 150g in any location.
GT175 grams maximum.
Scalextric Stock Car 225g
Modified Sports Prototype 400 grams maximum

yeah, 400 is a bit much but there was a time when we had no magnet limits.
 

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Discussion Starter · #15 ·
Mag testers are all well and good but metal track or magnetic braid isn't a solid chunk of iron so the readings on the testers isn't going to be the same as the car on the track.
It does not need to be compared to a track. The tool is used to compare cars and their downforce. As long as all of us are testing to the same scale, then all cars are balanced vs each other.
 
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