I can report that my electrical system is ETX 900 with it's own protection, w
ith Schicke GR6 regulator.
(Schicke state their Regulator should not be used without over voltage prote
ction).
My system includes Schicke OVP 15.2.
The OVP has its own protection/warning light plus a reset switch in case of s
purious cut off.
My system charges steady at 14.3 v
Operated for 25 hours so far without any problem.
Regards
Dave Park G-LDVO
> On 10 Sep 2017, at 13:55, davidjoyce@doctors.org.uk wrote:
>
> Duncan, Fair enough, but that wasn't my point. The primary 914 (electric) f
uel pump runs on despite the battery being sitched off (or removed for that
matter), and the alternator switch also off. I suppose that you could envis
age some scenario where an electrical major short or the like burns out all t
he wiring back to and including the alternator, but simply losing the batter
y doesn't stop the engine going.
>
> Regards, David
>
>
>
>
>> On 2017-09-10 11:40, ami-mcfadyean@talktalk.net wrote:
>>
>> David,
>>
>> The AH capacity of the LiPo4 batteries supplied as like-for-like replacem
ents of lead acid batteries is very much reduced (despite higher voltage and
higher CCA). One reason they are so light is because the overall pack size i
s made to be the same as the lead acid "equivalent", but the actual cells hi
de shyly in one corner of that package; it is largely fresh air.
>>
>> So the "equivalent" LiPo4 battery will not stay alive for as long a time f
or those essential systems that rely upon it, presuming the alternator or an
associated part of its system has failed.
>>
>>
>>
>> Duncan Mcf.
>>
>>> ----Original Message----
>>> From: davidjoyce@doctors.org.uk
>>> Date: 10/09/2017 10:33
>>> To: <europa-list@matronics.com>
>>> Subj: RE: Europa-List: Battery
>>>
>>> Brian, A lot of years ago I found myself over horizon to horizon thick f
orest, somewhere near the Czech border with all my electrical instruments sh
owing no signs of electricity and my assumption was that my 914 was running o
n the fuel left in the carb bowls Fortunately my standard checking system fo
und that both master and alternator switches were off and order was restored
before everything went quiet (I had just returned my pee bottle to its plac
e under my left thigh support and in doing so had managed to catch the toggl
e switches with my trouser bottom. I felt that I had to share this slightly e
mbarrassing incident with the Europa community via Matronics in the spirit o
f the club, and Andy Draper pointed out that if my wiring was as per manual t
he 914 would continue as the first pump is driven directly from the alternat
or before its output gets to the alternator switch. I have subsequently del
iberately switched everything off and found this to be true.
>>>
>>> Which makes me wonder about the exclusion of 914s from the Lithium b
attery approval. Clearly if your battery blows up you won't be able to get s
tarted, but on the face of it if it happens in flight you can still expect t
o get home, (assuming you can find the way!)
>>>
>>> Regards, David Joyce, GXSDJ
>>>
>>>
>>>
>>>
>>> On 2017-09-10 08:43, Brian Davies wrote:
>>>
>>> For those of you operating under the LAA system there is a Standard Mod S
M 14337 that gives details of approved Lithium batteries. Just a note of ca
ution when using batteries with a Battery Management System (BMS) that autom
atically disconnects the battery if over or under charged. The Rotax built i
n alternator produces avionics damaging voltages when the battery is disconn
ected. An overvolt protection circuit should be fitted to guard against this
.
>>>
>>>
>>>
>>> At the moment the Mod cannot be used for the 914 because it relies on a w
orking electrical system. The range of batteries will be updated as more da
ta becomes available from the manufactures. What has already become clear i
s that not all lithium batteries are suitable.
>>>
>>>
>>>
>>> Brian
>>>
>>> G-DDBD
>>>
>>>
>>>
>>> From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-s
erver@matronics.com] On Behalf Of Greg Fuchs
>>> Sent: 09 September 2017 20:30
>>> To: europa-list@matronics.com
>>> Subject: RE: Europa-List: Battery
>>>
>>>
>>>
>>> Paul,
>>>
>>>
>>>
>>> The ETX36C has been used successfully for years. The Rotax 914 charging s
ystem needs to be slightly modified to bring the charging voltage into the r
ange the lithium battery likes (Jim and Heather brought that to my attention
). A diode on the 'C' terminal of the Ducati regulator is adequate to fool t
he regulator into thinking the battery is at a slightly lower voltage than i
t actually is and so it will up its charge voltage, placing the battery into
proper charging range. I think its 13.9 to 14.6 volts per the data sheet, i
f memory serves.
>>>
>>>
>>>
>>> This lithium battery has cell protection. It has internal circuitry that
can remove the battery from the circuit due to too low or too high voltages
(i.e. when it is overcharged or drained). A happily charged battery will n
ot disconnect from the airframe. It is wise to have a good metal battery bo
x for these in the unlikely event of a thermal fiasco. A thin Fiberfrax laye
r can likely do wonders too.
>>>
>>>
>>>
>>> The weight savings is amazing.. When you hold them in your hand, they f
eel like a fake toy battery, but they will spin the engine right up for sure
.
>>>
>>>
>>>
>>> Greg
>>>
>>>
>>>
>>> From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-s
erver@matronics.com] On Behalf Of Paul McAllister
>>> Sent: Friday, September 08, 2017 7:13 AM
>>> To: europa-list@matronics.com
>>> Subject: Europa-List: Battery
>>>
>>> Hi All,
>>>
>>>
>>>
>>> My trusty Odessey battery has died and gone to heaven (or wherever batte
ries go).
>>>
>>>
>>>
>>> I am seeking peoples experience with the new style Lithium batteries, an
d in particular what can be sourced in the US.
>>>
>>>
>>>
>>> Thanks, Paul
>>>
>>>
>>>
>>>
>>>
>>> Virus-free. www.avg.com
>>>
>>>
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