I put a LiPo on the old Dave Prater gyro and electric start on the MAC. It worked great.
I just put a NOCO lithium on my Sycamore. One of the previous posts scared me a bit as after starting my Sycamore (914 Rotax) effortlessly, and restarting it with someone else at the controls, it quit starting the gyro after 3 tries. I jumped it with my NOCO jump pack (great unit) and taxied it around. it was dusk and I had all my lights on.. The lights all went out and surprised me a bit. As I headed back to the hangar the engine started misfiring and died.
I believe that once running, the alternator would easily carry the engine and lights load. I also believed that the magneto(s) would keep the engine alive. I had an ah ha moment when I remembered that I have 2 electrical fuel pumps, one as a reserve. But neither will run and magnetos won't run an engine that isn't getting fuel. I need an Auxiliary battery and system to switch to it. Bummer, I thought it was ready to fly?
What do you 914 operators do for redundancy?