06-05-2000 Ask Mike! Archive
Where do I find the right specs for my homebuilt?

Dear Mike,
 
I'm looking for info on engine and electrical installations, such as drawings and schematics. I've looked at some of the homebuilding books online and don't want to waste my money on something that just has a bunch of theory and wire sizing data. Do you know where I can get some drawings just to get the general idea of what I need to do?
 
-Chris
 
 
Chris;
 
For your theory & wire sizing data, refer to Advisory Circular (AC) 43.13-1b.  It can give you virtually any information you desire, from seeing how rivet spacing is derived, to miscellaneous powerplant detail.  When you get your inspection from the FAA for your airworthiness certificate, it will also 'look good' to your inspector to have it on your shelf.
 
Additional sources are the manufacturers of all the component parts you are installing.  For example, if you are going to purchase an aftermarket voltage regulator, most come with drawings showing at least one way to wire the charging system.  The Lycoming direct drive overhaul manual and the parts book relevant to your engine are available, as well as installation drawings direct from Lycoming.  Call them for details at 570-327-7074.
 
I realize your kit manufacturer has led you down the path before; however, if they have flying examples of their design, you shouldn't disregard all of their information.
 
Gear Green,
Mike