Gents, the subject of this topic is the SD-8 alternator voltage regulator — a totally different beast than the L2\3 regulators mentioned in some of the posts. It has no built in OV protection, etc. The permanent magnet voltage regulator is not compatible with a field controllled alternator and vice versa. And I am pretty sure there is no aircraft-proprietary magic in that regulator. It looks, smells, works exactly the same as any other permanent magnet alternator voltage regulator. The SD-8 alternator itself in its core has a regular $40-80 tractor alternator. What makes it a $600 aircraft alternator is that is simply how high of a price the market can bear in the absence of competition — nothing wrong with that if you believe in freedom. On the other hand, there is nothing wrong with educating yourself, applying yourself, experimenting, etc.
Regarding failures, i hear the permanent magnet alt voltage regulators can get very hot and need good cooling (more so than the field controlling variety). Mounting it on the cold side of the firewall on a surface that provides good heat sink and good airflow helps with their longetivity.
Building a Panther, but lurking here, like many others
Last edited by Kalibr : 02-13-2019 at 06:23 AM.