Write something... Okay, i'll try (sorry for my English) 
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Hello guys and girls!
I was mainly offline on the forum during summer season, cause we have a lot of local work, our customer's cars went "time attack" events, a lot of trackdays etc, and by the way, one of our M4 took 1 place in Russian Time Attack series in their class.
Anyway, if we come half year back, we have started the work on our own torsional rigidity platform, which will helps with testing our present stuff, and in developing some new products and solutions. We had worked on it during season, time to time, and finally i've pushed on it for the last 1.5 months and it finished at last.
Some short specs:
own torsional rigidity of our platform about 145000 Nm/Deg (of course its A LOT of steel, and welding, right. but some attentive comrades could notice that it has carbon fiber also! right - we have used for our platform same technology. !3+mm! thickness sheets of multilayer carbon fiber glued on the structural glue, like we use on our carbon roofs and carbon fiber walls)
angle measuring accuracy: ±0.0004”/ft or 10-second (± 0.002°) from 0° to ±0.5° ± 0.004° at other angles (during tests, we are using angles up to 0.5 degrees, so +-0.002 degrees)
for the force measuring we are using our race scales pads (longacre), so accuracy +-1kg (during tests we are applying force in 650kg/6375nm)
Angle sensors mounted on the turrets (front axle and rear axle) - we are using some transverse braces, without any solid fixing to the turrets, not to make difference in measurements. So if turrets will moved towards during measurements, braces will not make negative effect.
For measurement we are making two tests, per one on each side. For calculating final figures we are using average figure from two sides (for example, if we got 0.290 for the left and 0.280 degrees to the right, we are using 0.285, etc).
Anyway, i've made more than 50 measurements during this week, and could make some conclusions - on a rigidity about 14000nm/deg our measuring system make repeats in about 100nm/deg, so even 200-300nm improvements seen easily ;D.
I'll try to answer on some possible questions beforehand - yeah, we have tried already to make measurements on different applying force and tolerance stays about the same level (100nm/deg) even on 910kg.
Angle sensors - i'm glad that i've found those gauges, works great really. One of the best things, that they gives for our purposes mobile app, where we can connect both sensors in one time (bluetooth) and we can watch delta angle between two sensors. So no long calculations, really easy. I see final angle difference between front and rear axle and make correct force, that's all we need
I think now time to go to some test results, right?
.Hello guys and girls!
I was mainly offline on the forum during summer season, cause we have a lot of local work, our customer's cars went "time attack" events, a lot of trackdays etc, and by the way, one of our M4 took 1 place in Russian Time Attack series in their class.
Anyway, if we come half year back, we have started the work on our own torsional rigidity platform, which will helps with testing our present stuff, and in developing some new products and solutions. We had worked on it during season, time to time, and finally i've pushed on it for the last 1.5 months and it finished at last.
Some short specs:
own torsional rigidity of our platform about 145000 Nm/Deg (of course its A LOT of steel, and welding, right. but some attentive comrades could notice that it has carbon fiber also! right - we have used for our platform same technology
. !3+mm! thickness sheets of multilayer carbon fiber glued on the structural glue, like we use on our carbon roofs and carbon fiber walls)angle measuring accuracy: ±0.0004”/ft or 10-second (± 0.002°) from 0° to ±0.5° ± 0.004° at other angles (during tests, we are using angles up to 0.5 degrees, so +-0.002 degrees)
for the force measuring we are using our race scales pads (longacre), so accuracy +-1kg (during tests we are applying force in 650kg/6375nm)
Angle sensors mounted on the turrets (front axle and rear axle) - we are using some transverse braces, without any solid fixing to the turrets, not to make difference in measurements. So if turrets will moved towards during measurements, braces will not make negative effect.
For measurement we are making two tests, per one on each side. For calculating final figures we are using average figure from two sides (for example, if we got 0.290 for the left and 0.280 degrees to the right, we are using 0.285, etc).
Anyway, i've made more than 50 measurements during this week, and could make some conclusions - on a rigidity about 14000nm/deg our measuring system make repeats in about 100nm/deg, so even 200-300nm improvements seen easily ;D.
I'll try to answer on some possible questions beforehand - yeah, we have tried already to make measurements on different applying force and tolerance stays about the same level (100nm/deg) even on 910kg.
Angle sensors - i'm glad that i've found those gauges
, works great really. One of the best things, that they gives for our purposes mobile app, where we can connect both sensors in one time (bluetooth) and we can watch delta angle between two sensors. So no long calculations, really easy. I see final angle difference between front and rear axle and make correct force, that's all we need I think now time to go to some test results, right?
Attached Files
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