rearalt
730_RearAltrearalt

Corvair Rear Alternator

$120.00$375.00

The rear alternator is designed to use the John Deere style permanent magnet generator and regulator that the Corvair community has used for years.  It is mounted on the rear of the engine on a CNC cut bracket.  The drive has two pins which fasten in the Harmonic balancer “puller” holes.  These pins have rubber bushings on them which fit inside a drive plate on the generator.  This drive plate replaces the forward half of the generator pulley.  This arrangement puts no overhanging, or radial loads on the crankshaft. The bushings in socket allow a minor degree of misalignment.

We offer just the rear alternator bracket kit which includes:
CNC Brackets
Bushings and all hardware to install
Full instructions
Or the full assembly which adds:
John Deere Yanmar Alternator
Regulator
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Product Description

Overview:  The rear alternator is designed to use the John Deere style permanent magnet generator and regulator that the Corvair community has used for years.  It is mounted on the rear of the engine on a CNC cut bracket.  The drive has two pins which fasten in the Harmonic balancer “puller” holes.  These pins have rubber bushings on them which fit inside a drive plate on the generator.  This drive plate replaces the forward half of the generator pulley.  This arrangement puts no overhanging, or radial loads on the crankshaft. The bushings in socket allow a minor degree of misalignment.

This unit has run on the Panther LS N515XP prototype (70 hours of run time as of 1/11/2014) and proven to put out the results below.

Engine RPM          AMP output

850(idle)                 1-2 (erratic output)

1200                        3

1800                       10

2850                       20

The idle amp seems low and likely would not turn off the charge indicator light.

Here are a few things to consider:

While we were running we tested the amp draw to the ignition system at full throttle.  It used .7 amps!  We later tested our Glasair’s facet fuel pump.  It pulled just over 1 AMP.  This is in line with numbers from Pegasus Racing’s Website.  The radio and EIS only pull 1 AMP.   Modern lights don’t consume much either.  The biggest thing to consider is that this type systems doesn’t regulate power output, it just burns the excess up and turns it into heat, which is dissipated through the regulators cooling fins. You don’t want to make much more power than you use.

We recommend the Corvair for day VFR Aircraft and feel this system will easily power most aircraft in this class.  We will also be testing the 3 phase version of this unit which should produce 30% more power.

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