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  #1  
Old 10-04-2015, 09:39 PM
Sport Flyer Sport Flyer is offline
 
Join Date: Dec 2013
Location: Orlando, FL
Posts: 3
Default Can a Rotax 912 100hp handle these amps?

Dynon skyview 10" display - 2.1 amps
Dynode skyview 7" display - 2.6 amps
Dynon GPS Antenna - 0.1 amps
Dynon ADAHRS - 0.15 amps
Dynon ADS-B - 0.2 amps
Dynon C25 Com Radio - 3.0 amps
Dynon intercom - 0.1 amps
Dynon Xpndr mode- S Class 1 - 0.4 amps
Dynon backup battery - 1.0 amps
Dynon engine monitoring module - 0.11 amps
Dynon A/P module - 0.05 amps
Dynon WI-FI adapter - 0.1 amps
USB charging jack - 2.1 amps if charging I- Pad
ELT- 406 - 0.2 amps
Dynon SV-42's servos (pitch & roll) - 4.0 amps
Whelen - microburst lll - strobes - 1.2 amps
Whelen - microburst lll - Nav lights - 0.25 amps
Ray Allen trim servo - 1.0 amps
Facet electric fuel pump - 1.4 amps
LED landing lights - 0.2 amps

TOTAL Amperage: 20.26 (Rotax internal alternator only)
Obviously not all avionics would not be on all at the same time.
Landing: 11.52 amps @ 3,000 RPM in the pattern
Take-Off: 13.11 amps full power
Cruise: 14.21 amps if flying with A/P on
I would like anybody's thoughts and opinions on this subject. I reviewed the power curve in the Rotax manual and based on the different power setting it could handle the amperage that I am looking for. Thanks and look forward to hearing from some experienced Builders out there.
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  #2  
Old 10-05-2015, 01:22 PM
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bhassel bhassel is offline
 
Join Date: Jan 2005
Posts: 963
Default

If in doubt there are options. Rotax has an additional alternator mount point on the geared prop housing. There's also this alternative External Alternator for the Rotax

Bob
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  #3  
Old 10-05-2015, 05:16 PM
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Bill_H Bill_H is offline
 
Join Date: Aug 2010
Location: Marshall TX (KASL)
Posts: 1,783
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For a lot of detail, Search the RV12 forum using the term Dual Skyview. Particularly see this thread. http://www.vansairforce.com/communit...ad.php?t=80077
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