Conversion tool cps/wt to wt/cps - RCCanada - Canada Radio Controlled Hobby Forum
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Old 08-12-2008, 09:25 PM   #1
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Conversion tool cps/wt to wt/cps

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I found this tool that helped me allot when it came to convert european style centi poise system to weight or vise versa. It helps allot especially when some hobby shops only carries wt as opposed to cps. Here's the tool:

I just got big bores and people say 700 cps is the best. One guy said 700wt. I thought that was wrong becuase, i know cps is always a higher value than wt. so, i converted 700 cps to wt and i get about 54 wt which imo makes sense. So, when saying what oils to use use the proper term cps or wt. I believe team associated and team losi goes by wt and kyosho goes by cps. I think ultimate oils gives you both conversions. Hope this helps! Tekno.
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Old 08-12-2008, 10:57 PM   #2
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The problem with wt is its entirely made up, and has no real linear value. The wt from different manufacturers is different, in some cases by over a hundred centistokes (or centi poise) or more than 15 wt (depending on who's wt scales you compare). Someone's 35 can be another guys 45 or another guys 30. Its brutal trying to figure it all out.
What i did was reference a chart that took real oil from the processed bottles of the different manufacturers and put them through a rheometer, which is a calibrated divice designed to measure fluids in centistokes.
I went with the manufacturer who had the most complete list of results on their page - Losi. I then bought the complete lineup of their oils and scribed the centistokes number right into the cap, so i have both numbers as a quick reference at any time. Now i have a completely linear means of tuning with oils, and as a bonus, i can use in between measurements from companies with actual cSt or cps numbers on their bottles for very fine tuning.

Heres the page with the centistokes measurement:

Read through the charts and do some wt comparisons - you'll see what i mean when I say they're non-linear.

By the way, if anyone wants to get a current line of oils measured, all you'll have to do is send them a set of 10ml samples of each oil, labeled correctly, in clean, well sealed bottles that will survive shipping without leakage. I was in touch with these guys a few months ago and they said that they would do this, but that none of the manufacturers they were in touch with seemed interested in sending them a set of their oils.
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Old 08-13-2008, 09:55 AM   #3
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Its looking like the kyosho oils are super accurate compared to the other brands.
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Old 08-14-2008, 12:32 PM   #4
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yea everyone is saying that kyosho oils are awesome. I wanted to get 700 oil from kyosho but, my lhs has nothing in stock right now and won't make it in time for the race so i went with 55 all way round with green springs (med) all way round. I might have to stiffen the rear and leave the front as the way it is but, i will see at the track. Thanks for that info gump i didn't know that. Tekno.
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Old 08-14-2008, 08:25 PM   #5
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mine all say, cSt so i guess this cant help me
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