Sunday, April 21, 2019

Electrical System ULP V06

After several comments/mail and reading books about this stuff, I think I'm finally converging to something usable.


The primary system is taken straight out of the ULPower manual. I have added the fuel pump 2 and manual switches for fuel pump 1 and 2. The isolation switch is a manual one installed with the battery (this may change, not sure yet).

The Mascot 8660 is removed. The reason is it will be impossible to isolate all the components from the common ground. The RDAC needed for EGT, CHT and MAP must be grounded to the engine, or it wont be able to read anything, and so on. Ideally all the RDACs should be in the primary system, and communications should be optical (fiber), maybe in 100 years. With a common ground, all isolation is gone. The 8660 would really only function as a current limiting device. Another reason is the 8660, when taking into account the efficiency (81%) will be too small. This could be fixed by dividing the system and install another ECB, but then things gets too complex for this little aircraft.

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