Electricial Bus

Outline the components used to create the positive and negative buses.

Overview
The aircraft needs a series of positive and negative buses, and this creates a need to link the bus to distribute the supply to the circuits.

Hardware

6 /12-way terminal strips

The factory recommends the installation of a lateral and longitudinal support system to allow the components to be mounted and wires supported.

The longitudinal support has been installed previously, and this was used to mount the terminal strips. A screw type was selected with an integrated cover, which is more important for the positive to prevent accidental flashover as these will be supplying power to the instruments.

An issue has always been linking these, it can be done in several ways, either creating a lot of work or a mess. A search of the net located manufactured and insulated link to suit solved all issues.

Insulated links colour coded.

Note: Both items sourced off eBay

Load Analysis
Assume actual load = Breaker x 0.5

Comment
A series of wiring diagrams have been added to the blog over the break this allows ease of access for myself. The schematics are for each circuit, no attempt has been made to create the overall total schematic as experience has shown fond these are complex to develop then read on the job. 

The diagrams will over time have photos and wire colours added to the schematics, this will become part of a service manual for the aircraft. Currently, I am scouring the RV site for a simple method of adding wiring numbers without using a specialised printer.

Finishing the wiring is a way off, but the next job is to complete all the work in the passenger area - - battery, hydraulic, electrical and mounting.

Back on site on the 13th and after the break I am excited.

COMS

Wiring schematic Coms

Flap

Wiring schematic Flap

Flap controller right-hand junction box

EKP V

Wiring schematic EKP V

Propellor

Wiring schematic Propellor Controller

The propellor controller is a 2 1/4'' FlyBox propellor controller with a high response rate required  for high speed propellers (requiring regulation time from min to max pitch in 2~3 seconds). Propellor control is via the front mounted controls located on the instrument itself and via the two push buttons installed in the pilots throttle handle to allow inflight adjustment without using the main instrument.

Manifold Pressure

Wiring schematic Manifold Pressure

Tachometer

Wiring schematic tachometer

Water Temperature

Water Temperature wiring schematic

The water temperature gauge is a UMA 1 1/4'' electronic model Aircraft Spruce Part #10-05576 to suit the Rotax engine with a VDO 1/8'' NPT temperature sensor Aircraft Spruce Part #10-01648 installed at an adaptor located at the outlet of the radiator.  

Clock

Clock Wiring Schematic

The clock used was supplied is a 2 1/4'' quartz 12V electric model available from Aircraft Spruce. This was installed in the main panel and is protected using a 1 amp fuse.

CHT

CHT wiring schematic

EGT

EGT wiring schematic

Oil Temperature

Oil Temperature wiring schematic

Oil Pressure

Oil Pressure wiring schematic

Hydraulic Pressure

Fuel pressure wiring schematic

Fuel Pressure

Fuel pressure wiring schematic

Fuel Gauge Starboard

Fuel gauge starboard wiring schematic

Fuel Guage Port

Fuel gauge port wiring schematic

Ammeter

Amp meter wiring schematic

Voltmeter

Wiring Schematic Voltmeter