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Quad Roller Skating Forum Discussions about quad roller skates and any other quad skating discussions that do not seem appropriate for one of our other forums.

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Old November 25th, 2017, 09:56 PM   #1
fierocious1
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Default Cushion tester

I built this tester for testing cushion configurations. To test shapes, lengths and combinations of cushions to see what really happens during ramp up. I am currently using 3/4" long cone cushions instead of the standard SG .550 tall + cones. But wanted a way to compare in the ranges of resistance I skate in. Anyway, I am using a burned up electric motor for a stable rotating axis, a machined truck to attach cushions and a KP to. The arm is one foot long center to center for attaching a digital scale to. With the other tester, 25 degrees of lean is getting close to a usable limit. I have a degree wheel on there so cushions can be observed at specific lean angles.
Some pics,

https://www.flickr.com/photos/435057...posted-public/

https://www.flickr.com/photos/435057...posted-public/

https://www.flickr.com/photos/435057...posted-public/

https://www.flickr.com/photos/435057...posted-public/

A goal in this test is also to find a good amount of preload with extremely low ramp up. Awesome turning with stability at speed.
enjoy....
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Old November 25th, 2017, 10:52 PM   #2
quantoo
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Default i did enjoy thanks

your the only 1 experimenting with a cushion tester that i know of .
Is that an electric motor? and how do you adjust the amount of pressure/ rotation.
Is it synumeric?
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Old November 26th, 2017, 12:07 AM   #3
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Originally Posted by quantoo View Post
your the only 1 experimenting with a cushion tester that i know of .
Is that an electric motor? and how do you adjust the amount of pressure/ rotation.
Is it synumeric?
The motor is non-funcioning. It is only used as the axis for the arm to rotate on. Soon as I get the tension arm made and installed, videos coming...
The arm is rotated, the truck moves with it, but the shaft(KingPin) and cushions resist rotation. A scale at the end of the arm will be used to measure the resistance. So I can move the arm, say 10 degrees, measure resistance in pounds or whatever. Move it another 5 degrees and check again. As the resistance ramps up, the poundage goes up. Surprisingly the yellows with cups just flat out gave up and were nearly crushed at 25 degrees. Give me a week or so and I'll have the tension-er/scale in place and working.
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Old December 2nd, 2017, 07:27 AM   #4
quantoo
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Talking I'll give you 6 days only.

Quote:
Originally Posted by fierocious1 View Post
The motor is non-funcioning. It is only used as the axis for the arm to rotate on. Soon as I get the tension arm made and installed, videos coming...
The arm is rotated, the truck moves with it, but the shaft(KingPin) and cushions resist rotation. A scale at the end of the arm will be used to measure the resistance. So I can move the arm, say 10 degrees, measure resistance in pounds or whatever. Move it another 5 degrees and check again. As the resistance ramps up, the poundage goes up. Surprisingly the yellows with cups just flat out gave up and were nearly crushed at 25 degrees. Give me a week or so and I'll have the tension-er/scale in place and working.
Take your time im tying to merthfull.
The motor didnt seem to be connected up but it would be something i would use myself if it fit the bill quickly .not as if your selling a production run of these testers.
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Old December 2nd, 2017, 01:43 PM   #5
fierocious1
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Take your time im tying to merthfull.
The motor didnt seem to be connected up but it would be something i would use myself if it fit the bill quickly .not as if your selling a production run of these testers.
Its like... hmmm I have low ramp up..... Yes but. Talking about it and proving it is rwo different things. In my spare time I'm building these tools. My friends that run cars a Bonnieville have a homebuilt waterbrake to test motor output. It sits in their shop, in a corner. When the time comes they put a motor on it to let the motor prove up modifications/changes to the already powerful engine. 700hp normally aspirated on an antique 6 cylinder truck motor is almost unbelievable.
Well, we can all talk about what our skates are capable of, but that doesn't necessarily mean that our mods are a good thing. So you chase a goal and then apply it in a test. Then apply it to the floor. Big difference.
A lot of cushion descriptions in the skate board industry are vague. What each type/shape is good for, strip away the unknowns.
Cushion shapes, heights and hardness help you control your skates, but not all skaters skate in the same places and types of skating.
I like carving through traffic and cranking up the speed sometimes. So Im out to find the limits of a well mannered cushion configuration for my application. So far I'm really liking tall cushion... so how far can I go cushion wise, where is my limit at?
Anyway. This tool will be able to actually show that binding can occur at much different plate angles. Then a person has better understanding because what you could not see while skating is now right in front of you.
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Old December 6th, 2017, 08:44 PM   #6
Tislord
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Following.
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