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Testing - What's better? Lets do some science, and share the results.

Testing - What's better? Lets do some science, and share the results.

Old 12-29-2016, 11:45 AM
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And I'm back.

I hope everyone had a good holiday. And that's where my testing time went last week. Here's hoping I manage to get some time to do testing this weekend. At least I don't have anything in specific planned.

I just got off the phone with Boca. (yes, the bearing company.) What's the most common size .. lets say wheelbearing. I'm going to get a few samples from them for testing, and for "treatment" testing.
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Old 12-29-2016, 12:02 PM
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5x10x4 for my cars and most old school off road clutches ��

Last edited by 30Tooth; 12-29-2016 at 12:19 PM.
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Old 12-29-2016, 01:47 PM
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That's what I saw in my research too. Excellent. Here's hoping I get a decent variety of parts to test. :-)
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Old 12-30-2016, 04:29 AM
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Would be amazing to test a self aligning bearing like this:

I have a friend who works with SKF bearings, one normal ball bearing in 10x5x4 costs them almost 20$...
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Old 12-30-2016, 07:41 AM
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Originally Posted by 30Tooth View Post
A shock dyno would be the easiest thing to do (one like the CSI dyno, a rotary one), I have all the parts to do it here at home. Also, as I said before using a telemetry system one could use his own car as a complete dyno (my intention), having ~on track~ information. As we speak I have the G-forces and temperature sensors part done and to be more precise I will add a humidity sensor and I have a set of linear potentiometers to measure shock stroke I intend to add later. Oh and GPS off course.
Reading through this topic there are some neat thoughts....

Shock travel is not important to measure, you need to know how stable the chassis is, a G-force sensor on all corners of the chassis or a short distance range sensor (optical or ultrasonic) to measure the chassis height is better.
http://forum.arduino.cc/index.php?topic=87411.0

With an onroad car and an aluminium chassis you can even think of simple temp sensors on the front and rear to see if the chassis is touching the ground.

But your project looks a bit like mine
http://www.rctech.net/forum/nitro-ro...mes-alive.html
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Old 12-30-2016, 12:43 PM
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Originally Posted by Roelof View Post
Reading through this topic there are some neat thoughts....

Shock travel is not important to measure, you need to know how stable the chassis is, a G-force sensor on all corners of the chassis or a short distance range sensor (optical or ultrasonic) to measure the chassis height is better.
http://forum.arduino.cc/index.php?topic=87411.0

With an onroad car and an aluminium chassis you can even think of simple temp sensors on the front and rear to see if the chassis is touching the ground.

But your project looks a bit like mine
http://www.rctech.net/forum/nitro-ro...mes-alive.html
Indeed, I wanted to do like yours
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Old 01-05-2017, 11:42 AM
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Well Poo. Boca can't help. I guess I just get to order the bearings myself.

now.. to find time to get to the machine shop to build the test rig.
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Old 01-05-2017, 12:24 PM
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http://www.nationalprecision.com/min...lubricants.php

A detail of lubes, who makes them, and what's good about them.
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Old 01-08-2017, 03:25 PM
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Things are going without schedule here, I'm happy to report that found something that should be done earlier than shock dyno and it's easier to implement.
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Old 03-26-2017, 07:39 AM
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Wow, time goes fast. Personal issues are keeping me away from testing so I've been reading as much as I can. The most important thing there could be right now is tire testing, as knowing how much load, temperature and alignment they like. For that I've been modifying my arduino telemetry system to take temperature, humidity and G force. Still have to do a spreadsheet to organize collected data.
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Old 03-26-2017, 08:22 AM
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Anyone know how to do a carpet plot of TC tires.
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Old 10-10-2017, 04:07 PM
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How about orings?
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Old 10-10-2017, 06:05 PM
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I need to get to work on some of this... don't I?
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Old 10-15-2017, 01:14 PM
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Default home made dyno...

I've been testing my mod motors and learned a very valuable lesson.. Turn drag brake off, because the ESC may blow.


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Old 10-16-2017, 07:37 AM
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Dude, that's awesome. CAre to share some specs on it?

I can see industrial pillow block bearings, black PVC and endcaps, and arduino doing something.

How are you picking up rpm? Do you have any weight in the tubes? How are you accounting for the pillow block resistance?
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