 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
nuckolls.bob(at)aeroelect
Guest
|
 Posted: Tue Mar 21, 2017 5:58 pm Post subject: Lightweight rechargeable battery backup unit |
 |
|
| Quote: |
Having spoken to a distributor, he suggested a 9V PP3 battery (possibly switchable in the circuit) would be sufficient for emergency power if the main circuit failed. However, I would prefer a re-chargeable battery, re-charged through the aircraft system, so as not to have to worry or check that the backup battery is maintained in a charged state. |
Be cautious here my friend. Consider ANY battery
you install for ANY purpose on your airplane . . .
batteries are like house plants . . . no, worse
than house plants . . . at least you can SEE when
the sucker has wilted.
Just because you have a set of secondary cells
(rechargeable) supported by an outside energy
source does not eliminate the need for periodic
capacity testing to make sure that battery will
meet mission goals when called upon to do its
task. Another battery, whether rechargeable or
not, becomes another line item on your
ship's preventative maintenance list . . . a line
item that, unlike your tires, cannot be visually
inspected for airworthiness.
Tell us about the rest of your airplane. What
kind of alternator(s), battery(ies), ignition
systems, fuel motivators, etc. Is your engine
electrically dependent? If so, how are you reducing
risk for loss of electromotive incentives to keep
the fan running?
Given that so many OBAM aircraft are being configured
with a great deal of electrical dependency, then
it automatically follows that what ever is planned
to keep you airborne is also adequate to keeping you
right side up and headed in the right direction.
Bob . . .
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
 |
BobD
Joined: 05 Jan 2016
Posts: 112
Location: Sheffield UK
|
| Posted: Wed Mar 22, 2017 4:16 pm Post subject: Re: Lightweight rechargeable battery backup unit |
|
|
Bob, Thanks for responding to my post.
My aircraft is a part built Europa Tri-Gear, with a Rotax 912 ULS engine. I realise that any battery requires maintenance, I am just looking for something that will last potentially between annuals, whereas I suspect a normal PP3 battery would last for less than three months. This battery would also only be required to power the backup ASI and Altimeter whilst I found somewhere to land (possible 30 minutes in the UK), and would only be called upon in the case of a total failure to the main electrical system.
The original three devices suggested in the LAA leaflet, whilst having built in battery backup, are not cost effective in my view.
My thinking is that if nothing economical in both cost and weight is available, I may as well stick with the steam driven backups of ASI, Altimeter and Compass.
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
_________________
Bob Dawson
Europa XS TG || 912 ULS || G-NHRJ || Dynon Skyview || PilotAware || SmartAss3 |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
