Starting Technique.
I have recently converted to a Rallye 180, starting is performed with the alternator OFF , which is then brought on line once the engine is running - Why? In 20 years of flying various types I have never come across this technique, but I have heard of it before in various flight test reports.
If various electrical services such as radios have not been switched off on the previous shut down I can seee that this technique could prevent spikes but beyond that I am puzzled. Asking the people who operate the aircraft has resulted in the answer " we have always done it like that".
WHY ??