Today's Message Index:
----------------------
1. 06:39 AM - Re: 912 Bed-Mount bolt torque (rlk@granderiver.net)
2. 01:52 PM - Re: Rotax 912 UL Rectifier wiring (h&jeuropa)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 912 Bed-Mount bolt torque |
My 701 uses the bed mount also. The only reference I can find is in my
old Rotax Heavy Maintenance Manual. 71-00-00. Page 20. Paragraph (6.1.3)
May 01/2007. It's for a dynafocal mount. But it is using the same bolt
holes as the bed mount. 29.5 ft. lbs. Also specifies that these should
be 10.9 strength bolts. I recently replaced my M8 bolts after about 1500
hours on them. Finding this reference was why I changed them.
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Rotax 912 UL Rectifier wiring |
I have Lockwoods article. While the text does indeed state the positive charging
wire which is connected to R, B+ and C must not remain connected to the positive
side of the battery when the master switch is turned off or the battery
will discharge when the engine is not running, note the Attention box on the same
page which states during engine stop, break circuit between battery and terminal
C to avoid discharge of battery. This last statement is correct. R and
B+ can remain connected without problem.
The original circuit you submitted from Allegro provides correct electrical operation
if you remember to always turn off breaker 13 when you shut down the engine
and turn it on after engine start. R and B+ will always have 12VDC on them
but C will only have 12VDC when breaker 13 is on.
If you wish to control when 12VDC is applied to R and B+, you might want to add
a contactor or solenoid like Aircraft Spruce PN STS-12M. The problem with that
is the solenoid itself requires about 3 amps to operate which is a problem
when you dont have much electrical capacity as your load analysis shows.
Are you certain about your load analysis? Are the position and strobe lights LED?
The Rotax Ducatti will operate at 11 amps OK but much more than that it will
fail from overheating causing internal components to fail. It will not reliably
operate at 18 amps no matter what the documentation says:)
Let me know if I can help further. What is the original charging problem that
started this thread?
Jim Butcher
Europa XS, Rotax 914 1000 hours
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=485741#485741
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|