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Old 07-20-2004, 08:42 AM   #11
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Hi guys

Hate to rain on your parade, but you require a slight mathematical correction.

Since most manufactures(save SimJet and Artes) require 5% by volume of turbine oil in the fuel, the correct calculation is as follows:

9.46L / .95 = 9.958L Kerosene/turbine oil mixture

9.958L - 9.46L = .498L or 498 ml of turbine oil

What you have calculated above is actually 4.76% turbine oil/kerosene mixture. So half a quart(473ml) of oil per jug is actually on the light side of 5%.

Ed Miedzybrocki
Great Northern Models
Your Canadian Jet Source for BVM, Festo, Fei Bao, Robart, JetCat, Jersey Modeler, Skymaster, Graupner Modelbau and more coming...!!!
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Old 07-20-2004, 11:19 AM   #12
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Picky Picky.. I forgot that we want 5% of the total volume (oil included). Yup, its 496ml per big CT jug of kero.

I know the wren 54 will work as low as 2.5% - I imagine that much of a difference in the kj66's wont be a problem either (that is, having 0.0025 less oil than 5%)

I bet there is more varience than that in the restriction that feeds the bearings from the fuel intake, VS the temp and viscosity of the oil/kero, etc. There has to be some kind of allowed variation for this?
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Old 07-20-2004, 04:46 PM   #13
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Yeah and the funny part is that the Wren work and LAST at 2.5% of TCW3 oil, not fancy turbine oil
Sorry for my bad english
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