Williams WR27-1 (3)

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Jon managed to obtain a replacement hydraulic starter as I cannibalised the original one, he sourced it because he felt that an electric start unit was likely to very expensive and possibly unreliable, especially after the failure of a $400 motor he imported from the states, so why not restore it back to it's original proven starting arrangement?

Saying that, I am prepared to give the electric start system another chance, if it fails I will probably complete the hydraulic starting system which Jon was in the process of doing when he sold me the engine. So as luck would have it, Ian recently picked up a series wound motor that may be just powerful enough to start the Williams, so I pinched it.
Jobs a Goodun.

Due to the space restraints and fixing issues, I deemed it a good idea to remake the bearing carrier of the motor, this will make mating of the motor to the spacing tube a doddle.

Pictured are the components that make the starter arrangement, from the left the original splined part of the hydraulic starter, then the spacer tube that Jon had made for his electric start system, followed by the drive spline which fits over the motor spindle.

Hey Presto, a complete start unit, but will it be powerful enough?
And it would be a decent project if the motor didn't foul on the intake plate now would it! Fortunately the plate is made from .5mm stainless, so cutting a section out for the starter was easy, saying that every time something goes well, something else doesn't, I wonder what it will be?

I have now modified the wiring loom and tried to colour code the various devices attached to the WR27, this way I feel more confident about where the wires are going and what they do.

The built in generator is now no longer going to be used for it's intended purpose, I will however take a tap from the coil to electronically obtain the engines RPM, at 100% RPM should equate to 600Hz.
I have removed the original control/ junction box and replaced it with a die cast box, a QR Bicc or QM connector will be used to attach the control panels cables.

As a way of soft starting the starter motor, I made use of a Kelly ESC, easily programmed and set to go from zero to full power over 4 seconds. However in real word testing I managed to obtain a higher RPM without it, only a couple of percent, but every bit of power is required to start this engine with an electric starter motor.

The control panel is made from 4mm aluminium and has been laser cut, the profile is designed to fit inside a Pelican case.

THe basic panel with components added, the wiring at the rear is the next job.
Wiring completed. To cut a long story short.
Latching starter relay with electronic cut out at 40%RPM, electronic RPM board with cut out (thanks to Ian) and alternating on/ off ADV using a relay.
ADV energised with either Wander Lead, Mom Push or Latching Toggle Switch.
One completed Williams WR27-1 Control Panel.

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