To: Rotary motors in aircraft
Subject: [FlyRotary] Re: RWS ECU Switch call-out

 

A thought on the injector power supply.  In my installation I use a separate

power supply for primary and secondary injectors (as well as for the coils.)

In my case primaries are wired to battery 1 and secondaries are wired to

battery 2.  Even if you are using a single battery (IMO) its beneficial to

have separate wiring/switches/overload devices.  If a power supply wire,

switch, overload, connection were to open there goes all supply to the

injectors (or coils.) 

 

I agree.  Fault tolerance (read reliability) is redundancy from source to use.  I designed for either of any of the engine critical items (ECU, coils, injectors, fuel pumps) to operate from either of two batteries, fully isolated.

 

This required the use of some diodes which may have uncovered some noise issues in the EC2 - don't know for sure yet.  The isolation diodes can prevent voltage spikes from traveling back to the batteries where they would dissipate.

 

Al