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7. SCX Advance. Empty. Trying to easily source V2.0 compatible Bluetooth lapcounter.
My understanding is that the current version of the SCX-A Bluetooth unit will remain compatible with the new SCX-A v2.0 throttles and SCX-A v2.0 decoders when they enter market later in the year. I believe the only issue with the Bluetooth units is that the very first units in market had slightly low sensor gain. They worked fine with all cars except the rally cars that use the type-B decoder. This decoder sits a bit higher on the underpan leading to a slightly lower ID signal strength. That issue and the correction mod are all documented on the SCX-Advance thread of sfi.

Hope that helps.

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I have been thinking about the pros and cons of the above vertical loop versus horizontal drag strip testing at speed.

And a question has occurred to me for which I dont have a good answer...

For vehicles travelling on a 1m radius loop at 10m/s it looks like the centripetal force on the car is ten times the static force known as vehicle weight.

This means, for cars travelling at 10m/s the force exerted by the road upwards onto the car is ten times its weight. In simple terms this is like increasing downforce by a factor of ten for a vehicle on a flat road.

So the question... when downforce is increased by a factor of ten what happens to the following:

1/ road clearance?
2/ braid pick-up noise?
3/ expected levels of vehicle buffeting?

Maybe these effects are insignificant? Im not sure?

I guess I could check 1 by putting a 1kg weight onto a 100g slotcar and seeing what happens.

Please dont anyone treat my question as being in any way critical - my interest here is understanding the pros and cons of testing using a loop versus testing using a high speed drag strip... I suspect both have merits but in different ways.

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I guess having more stress on the car and other components is good especially in regards of braid noise.
What I am keep to understand... if downforce increases ten fold does that...

1/ create more pick-up noise making the high speed vertical loop a more challenging environment for testing decoders or

2: create improved electrical connection between car and track and therefore better connectivity between car and track making the test environment less demanding.

I would be interested to learn more in this area from our gurus... please?

By the way I 100% agree the loop is awesome and beautifully crafted :thumbsup:

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I agree with all of above. My question is more to do with how the loop will be used to test SSD components at high speed. Clearly SSD uses track packets to control the car so I am wondering whether the loop, as constructed by Rick and his team, will provide a more challenging environment for pick-up noise or whether the increased downforce will create less pick-up noise and/or less pick-up voltage spikes. I guess the answer might be braid-type dependent? Either way as discussed above the loop looks an excellent tool for system testing and... I too agree it is pure art and inspirational as per the above 2001 references.

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Hi Joel, I think the idea is that new designs still need robust testing even though the digital systems into which they play have been extensively tested over the years including characterisation of any performance limits. But new decoder designs still need thorough testing before market launch. The loop looks great for that purpose. And great for testing developments in cross-system compatibility too.

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