|
|
Oh, forgot: The extra 55A alt weighs roughly half what an extra PC680 weighs.
I took a slightly different path; I figured that if the alt quit, then the flight limit is how much the battery has in its 'tank'. A PC680 sized SLA is good for about 40 minutes with typical load from electronic injection. I've become a bit of a sissy in my old age; I want the engine to run until the fuel in the *gas tank* is gone. So, I made some brackets to add a 2nd alt; mounted where the air conditioner compressor lived in the car, and run off the 2nd pulley. Of course now, with it looking like Covid's going to outlast me, I'll likely never get to travel in the plane anyway, so I may just go back to the 40 minute limit & save the weight.
Charlie
I flew for a number of years with two 22 lb batteries without every needing the "spare". I then switch to a single Odyssey PC 680 17 lb battery and switched it out every 3 years (stuck used one in riding mower) and flew for over 15 years using this configuration. Never had a battery problem with either, but saved weight and money with the one battery.
But, my view is if you are not comfortable flying with a certain configuration, then don't. Fly with a configuration that you feel secure with and you will enjoy flying all the more.😄
Ed
------ Original Message ------
Sent: 7/30/2021 3:21:45 PM
Subject: [FlyRotary] Re: Airventure 2021
Le Roux, Agree a great product, but I am more concerned with the engine battery backup. Therefore I have 2 batteries . Since no longer flying instruments, I can still fly looking out the window, but if the engine fails --- Then you know what is trumps!! Neil. Realy nice product
|
|