I wish it were so. While most loggers can handle a momentary power
loss, not all can. I spoke at the last convention on this and related
avionics wiring issues. I contacted each manufacturer and as of Feb,
2006, I compiled the information below. I need to add the EW
MicroRecorder. I will be speaking on Saturday at the Memphis
convention if you are interested in more details.

2:00PM 3:00PM John DeRosa
Understanding Soaring Recorders and Computers
Convention Center Ballroom C

3:15PM 4:15PM John DeRosa
Aviation Electrical And Electronic Wiring Basics
Convention Center Ballroom C

- John DeRosa "67R"
======================
Cambridge
During a power Interruption, will IGC file be maintained?: Yes
How long of a power interruption can be survived?: 2 hours with aux
battery, otherwise no response
Start new log file?: 5 mins before starting new log file
Require secondary power source?: CAA-117 auxillary battery
Other information maintained?: Yes
Minimum operational voltage?: 8vdc is guaranteed but 6vdc is possible

Garrecht Volkslogger
During a power Interruption, will IGC file be maintained?: No, new file
How long of a power interruption can be survived?: 0.1 sec
Start new log file?: Yes
Require secondary power source?: Yes
Other information maintained?: Yes
Minimum operational voltage?: 7vdc

LX Navigation
During a power Interruption, will IGC file be maintained?: Yes
How long of a power interruption can be survived?: Approximately 1 min
Start new log file?: 1 min before starting new log file.
Require secondary power source?: No
Other information maintained?: Yes
Minimum operational voltage?: 8vdc

New Techologies
During a power Interruption, will IGC file be maintained?: Yes
How long of a power interruption can be survived?: few seconds
Start new log file?: 5 mins before starting new log file
Require secondary power source?: No
Other information maintained?: Yes
Minimum operational voltage?: 8.9vdc

Borgelt
During a power Interruption, will IGC file be maintained?: Yes
How long of a power interruption can be survived?: hours to weeks
Start new log file?: no response
Require secondary power source?: Internal "super" capacitor
Other information maintained?: Yes
Minimum operational voltage?: 10.0vdc




Eric Greenwell wrote:

I thought all loggers just started again after a momentary power loss,
and continued the same flight file. It sounds like yours isn't behaving
properly, or are some brands a bit touchy?