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>>I noticed a reference in the (excellent) Europa Flyer which I just received
>>that the use of an aircraft type battery contactor (relay type battery
>>isolator) is not recommended as the standard Rotax alternator does not have
>>enough output to support the coil current.
The Rotax alternator is pretty light but not sufficient
excuse to forego the safety offered by classic battery
contactor installations.
>>My question is, is an 'aircraft type battery contactor (relay type battery
>>isolator)' the same as a master solenoid. It sounds the same but can't
>>believe the alternator cannot cope. The Europa manual suggests a master
>>solenoid draws about 1 amp so should not be a problem.
The contactors I use do indeed draw 0.9 amps. When you think
about how the system is usually loaded, with all normal day
VFR equipment on, you shouldn't have more than 5 amps of goodies
running. Add 0.9 amps for contactor and the 912 still has 12
amps left over to charge battery. Nite VFR adds about another
9 amps which pushes your alternator to the limit but still
possible.
Landing lights don't count . . . they should be used sparingly
and/or be small 50W halogen lamps that don't overload the system
so badly for the short time that you need to run 'em.
Gerry Holland
Intranet Solutions Inc.
gnh@ddsc.demon.co.uk
gerry.holland@intranetsol.com
Mobile +44 (0) 374 755889
Office +44 (0) 1761 435706
Fax +44 (0) 1761 432472
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