Don't confuse Lithium Ion batteries (Phone, laptop) 4.2 volts per cell with LiFePo4 (Lithium Iron Phosphate) batteries 3.6 volts per cell like EarthX I built a custom dual 20ah battery system for my experimental plane; the lower cell voltage makes them an easier replacement for 12v systems. The higher voltage of earlier lithium batteries was preferred because of the higher density/capacity. When LiIon batteries are seriously abused (over charge or punctured) they will flame and start a fire; LiFePo4 will not flame on failure of any sort making them much more reliable and suitable for airplanes.
CORRECT ME IF I 'M WRONG ! I am private pilot, an automotive master technician and have had many a road call for dead battery fails due to alternator failures being the main culprit. A road call is an inconvenience, a fail in flight is an event ! The electronic low voltage threshold was 10.5-11.0 v, rule of thumb ! How to make this, for lack of better description( I include myself in this ) "stupid proof " is with audible warnings. I found the average truck driver only stops when the engine quits or the air conditioning, unless there was a really annoying audible going off to interrupt his radio listing pleasure. Point is we are creatures of comfort and it is hard to scan the gauges when enjoying a beautiful day of flight.
As another commenter pointed out, generally a regular battery is considered dead at 10.8 or so, meaning it probably can't be brought back with a charger. Seeing the lithium "protect" itself and then have some voltage back is nice. Also should be noted that most regular battery chargers and tenders won't work with a lithium, so that comes in to play when long down times are needed. an in between solution would be an AGM battery. I do not know if they make them in this size (I assume so, but haven't looked) and that much longer running times than a 'regular' battery of equivalent size and don't cost much less than a lithium. Can't beat the weight savings though.
Mistor Webman They were selected from physical size. The Lithium battery was 12 Amp hour. The Lead Acid was 7. The lithium weight was 3,75 lb and the lead acid 5.75 lb
@@eggenfellner 12 amp hours delivered by the lithium battery divided by the 2.75 hours run time discovered in your test gives us 4.3 amps to run the engine. A 100 watt solar panel at 80% capacity = 80 watts. 80 Watts divided by 12 volts gives us 6.7 amps. A flexible solar panel would be interesting…much less weight than an alternator with zero moving parts…
why does your engine shutoff when the battery "dies"? No magneto spark system? Your EarthX didn't "die". The Battery Management System actively sensed the lower voltage and disconnected itself from the circuit. As voltage recovered with no load, it switched back.
This was'nt really a fair test.. comparing a higher capacity lithium to a lower capacity lead... What did you expect ?, of course the lithium lasted longer ! The results would not be so dramatic had the Ex battery been compared to an Aerolithium battery. Compare a lithium to another lithium. .. But of course, Viking endorses Ex, so, dont hold your breath for that to happen.
I guess you don’t follow along, we use sealed lead acid odyssey PC310s in our setups - we don’t like the EarthX in our setup due to unpredictability. I think you should know that facts before throwing judgment. This was a basic quick test done, wasn’t meant to be all that scientific. Essentially we wanted to see how long it would last in the lead acid, and used what we had at the time. We endorse products only when we know they are safe and work in our systems, and if at a point our opinion or experience changes, we change it.
Don't confuse Lithium Ion batteries (Phone, laptop) 4.2 volts per cell with LiFePo4 (Lithium Iron Phosphate) batteries 3.6 volts per cell like EarthX
I built a custom dual 20ah battery system for my experimental plane; the lower cell voltage makes them an easier replacement for 12v systems.
The higher voltage of earlier lithium batteries was preferred because of the higher density/capacity.
When LiIon batteries are seriously abused (over charge or punctured) they will flame and start a fire; LiFePo4 will not flame on failure of any sort making them much more reliable and suitable for airplanes.
CORRECT ME IF I 'M WRONG !
I am private pilot, an automotive master technician and have had many a road call for dead battery fails due to
alternator failures being the main culprit. A road call is an inconvenience, a fail in flight is an event ! The electronic
low voltage threshold was 10.5-11.0 v, rule of thumb ! How to make this, for lack of better description( I include
myself in this ) "stupid proof " is with audible warnings. I found the average truck driver only stops when the engine
quits or the air conditioning, unless there was a really annoying audible going off to interrupt his radio listing pleasure.
Point is we are creatures of comfort and it is hard to scan the gauges when enjoying a beautiful day of flight.
so what battery would you recommend?
Thank you for taking the time to make this video.
As another commenter pointed out, generally a regular battery is considered dead at 10.8 or so, meaning it probably can't be brought back with a charger. Seeing the lithium "protect" itself and then have some voltage back is nice. Also should be noted that most regular battery chargers and tenders won't work with a lithium, so that comes in to play when long down times are needed.
an in between solution would be an AGM battery. I do not know if they make them in this size (I assume so, but haven't looked) and that much longer running times than a 'regular' battery of equivalent size and don't cost much less than a lithium. Can't beat the weight savings though.
Insightful. Thank you for sharing this!
noting
2600rpm - Lead-acid 0:55, Lithium 2:45
Threshold for Viking ECU ~8.0V
Threshold for EarthX680 ~11.0V
Yeah you really nice making plane
I'll always be a lithium battery fan, it's a lot lighter compared to lead acid, and has many other advantages
Very informative
Glad you think so!
Nice Corvette!
Good info
But I need your help how I fand gearbox how I collect gearbox which companies sales this gearbox can you give me about details
Were both batteries the same Ampere Hour capacity? How much did each battery weight?
Mistor Webman
They were selected from physical size. The Lithium battery was 12 Amp hour. The Lead Acid was 7. The lithium weight was 3,75 lb and the lead acid 5.75 lb
@@eggenfellner
12 amp hours delivered by the lithium battery divided by the 2.75 hours run time discovered in your test gives us 4.3 amps to run the engine.
A 100 watt solar panel at 80% capacity = 80 watts.
80 Watts divided by 12 volts gives us 6.7 amps.
A flexible solar panel would be interesting…much less weight than an alternator with zero moving parts…
The SODIUM ion battery is available now
The engine wont run as long at higher rpm, it draws more current as the revs increase.
idontcare80
Yes, for sure. But this was to compare, more than anything else.
It is true. Just used 2600 as a reference between the two batteries
✌🏽👶🏽🚬
why does your engine shutoff when the battery "dies"? No magneto spark system? Your EarthX didn't "die". The Battery Management System actively sensed the lower voltage and disconnected itself from the circuit. As voltage recovered with no load, it switched back.
There is no magneto with Honda conversions. This is why the backup in this sense is dual battery to assure power for spark coils.
This was'nt really a fair test.. comparing a higher capacity lithium to a lower capacity lead... What did you expect ?, of course the lithium lasted longer ! The results would not be so dramatic had the Ex battery been compared to an Aerolithium battery. Compare a lithium to another lithium. .. But of course, Viking endorses Ex, so, dont hold your breath for that to happen.
I guess you don’t follow along, we use sealed lead acid odyssey PC310s in our setups - we don’t like the EarthX in our setup due to unpredictability. I think you should know that facts before throwing judgment. This was a basic quick test done, wasn’t meant to be all that scientific. Essentially we wanted to see how long it would last in the lead acid, and used what we had at the time. We endorse products only when we know they are safe and work in our systems, and if at a point our opinion or experience changes, we change it.