Stewbronco
Well Known Member
Searched this but came up short on pictures .... anyone got pictures of battery mounted on front side of firewall ? Thanks. Stew
I would consider rotating your starter solenoid 90 degrees if you?re planning any aerobatic flight. Bob Knuckols talks about this in his AeroElectric book. The G load on the aircraft could close the starter contact and engage the starter damaging your ring gear.
I tested both of the contactors shown back in June of 2017. Following are the steps taken for testing:
1. Removed end caps to allow disassembly
2. Removed and weighed the contactor shaft assembly (not including spring)
3. Replaced the shaft assembly (with spring) back into the housing
4. Placed the assembly, upside down, on a sensitive digital jewelers scale
5. With an LED connected across the input/output terminals of the contactor, I pushed down on the housing until the LED came on
6. Recorded the force required, and then divided it by the "tare" weight of the
shaft to yield the "G" force necessary to initiate contact.
7. Results (YMMV): Master Relay - "Tare" Wt. = 2.1oz. Force to make contact = 13oz. 13/2.1 = 6.2 G's. Since this switch is on all the time, there will be no change in its condition, unless you apply more than 6.1 G in the negative direction.
Starter Relay - "Tare" Wt. = 1.5 oz. Force to make contact = 1lb 6oz. 22/1.5 = 14.66 G's. At this level it would be pretty hard to make unintended contact during aerobatic maneuvers.
Disclaimer: These results are only for the units tested - I don't know how other brands of contactors may very as to their performance.
HFS
YMMV
Interesting! I searched my copy of AeroElectric Connection but couldn't find it. What page is it?
ITS GOING TO GET HOT THERE.