Hallo.
I am deciding which alternator will suite my new aircraft.
Can't find on the web power consumption for two devices:
- Garmin new GTR 225A & 225B VHF (most interested in 10W transmitter unit current draw);
- Garmin 695.
Also, I would like to install a B&C SD-20 but can't easily determine which will be the current produced at a given engine RPM and the raccomended maximum continuous current which it can support. I found a table on bandc site at which alternator RPM will produce current, but it states 29 amperes @ 3.000 alternator RPM. On the brief description of their web it is said that it produces 20 amperes @ 3.500 alternator RPM. On the Aircraft Spruce site it is said 20 amperes @ 2.500 alternator RPM. It is a mess! Since engine RPM/alternator RPM is 1 to 1.3, at 2.350 engine RPM only 3000 alternator RPM may be produced. So if the correct output is 20 amperes @ 3.500 alternator RPM it may not be enough at 3.000.
Thanks.
Camillo
I am deciding which alternator will suite my new aircraft.
Can't find on the web power consumption for two devices:
- Garmin new GTR 225A & 225B VHF (most interested in 10W transmitter unit current draw);
- Garmin 695.
Also, I would like to install a B&C SD-20 but can't easily determine which will be the current produced at a given engine RPM and the raccomended maximum continuous current which it can support. I found a table on bandc site at which alternator RPM will produce current, but it states 29 amperes @ 3.000 alternator RPM. On the brief description of their web it is said that it produces 20 amperes @ 3.500 alternator RPM. On the Aircraft Spruce site it is said 20 amperes @ 2.500 alternator RPM. It is a mess! Since engine RPM/alternator RPM is 1 to 1.3, at 2.350 engine RPM only 3000 alternator RPM may be produced. So if the correct output is 20 amperes @ 3.500 alternator RPM it may not be enough at 3.000.
Thanks.
Camillo
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