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Posted

Folks:

Here is the report on today's effort.  I went out with the intent to complete the circuit by taping the switch vane in place up. Then turning master on and testing voltage at various points on the circuit, to see if there was a large voltage drop across the switch, indicating excess resistance.  You can understand my disappointment when I turned on the master and the sonalert sounded.  I only did two voltage tests.  Checked 22,7 volts to ground on the plus side of the sonalert and 22.7 acrosss the sonalert.  I de-taped the vane, and hand triggered it a number of times to get it to fail, but it did not.  I reinstalled the sonalert into a little panel that held two other sonalerts, screwed it up, put on the fabric cover.  I kept running out to the vane switch each step of the way, expecting a failure and not wishing to discover that when fully assembled.  So now it works.  Very un-satisfying solution to this.  I went and test flew it into a stall, and it didn't give me but 3 or 4 kts warning prior to stall (clean), but I'm going to let that dog lie.

Regarding all the advice and help you have all offered, thank you very much.  You have been very supportive.  Regarding the advice from PT20J and M201MKTurbo. those issues are somewhat moot now, but lacking any advice at the time, several days ago, somewhat of a Hail Mary,  I sprayed some contact cleaner into around the vane from the leading edge and by feel only, tried to spray the switch up through the access hole reaching in as deep as I could.  Well, what's done is done on that score.

I was intending to finish this note with, "Last call, leaving the pattern", but without a clear cause and corrective action, I am likely to be back.

Thanks all, stay safe.

Jer

 

 

 

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Posted
16 minutes ago, Jer said:

Folks:

Here is the report on today's effort.  I went out with the intent to complete the circuit by taping the switch vane in place up. Then turning master on and testing voltage at various points on the circuit, to see if there was a large voltage drop across the switch, indicating excess resistance.  You can understand my disappointment when I turned on the master and the sonalert sounded.  I only did two voltage tests.  Checked 22,7 volts to ground on the plus side of the sonalert and 22.7 acrosss the sonalert.  I de-taped the vane, and hand triggered it a number of times to get it to fail, but it did not.  I reinstalled the sonalert into a little panel that held two other sonalerts, screwed it up, put on the fabric cover.  I kept running out to the vane switch each step of the way, expecting a failure and not wishing to discover that when fully assembled.  So now it works.  Very un-satisfying solution to this.  I went and test flew it into a stall, and it didn't give me but 3 or 4 kts warning prior to stall (clean), but I'm going to let that dog lie.

Regarding all the advice and help you have all offered, thank you very much.  You have been very supportive.  Regarding the advice from PT20J and M201MKTurbo. those issues are somewhat moot now, but lacking any advice at the time, several days ago, somewhat of a Hail Mary,  I sprayed some contact cleaner into around the vane from the leading edge and by feel only, tried to spray the switch up through the access hole reaching in as deep as I could.  Well, what's done is done on that score.

I was intending to finish this note with, "Last call, leaving the pattern", but without a clear cause and corrective action, I am likely to be back.

Thanks all, stay safe.

Jer

 

 

 

Excellent documentation for the rest of us for the future, thanks.

Did you try looking for a new switch in case you needed it?

Posted

Replying to RagsfF15E

No I did not locate another switch.  I am not sure what it is.  I have the S/N correct service and parts manual and I can't figure out what it really is.  If it is one with a standard microswitch, I would just change that out, assuming I was smart enough to figure out the removal process.  I'll cross that bridge if need be.  I did however buy an extra sonalert in case the project pointed that way.  Not here yet.  amazon $35, 3 or 4 day delivery.  I guess it will just be one more piece of hardware for my son to throw out after I'm gone.  Please pardon the cynicism.

Jer

  • Thanks 1
Posted
2 hours ago, Jer said:

Not here yet.  amazon $35,

Good move!

Having a spare will insure you'll never have a failure:D

Posted
11 hours ago, Jer said:

Folks:

Here is the report on today's effort.  I went out with the intent to complete the circuit by taping the switch vane in place up. Then turning master on and testing voltage at various points on the circuit, to see if there was a large voltage drop across the switch, indicating excess resistance.  You can understand my disappointment when I turned on the master and the sonalert sounded.  I only did two voltage tests.  Checked 22,7 volts to ground on the plus side of the sonalert and 22.7 acrosss the sonalert.  I de-taped the vane, and hand triggered it a number of times to get it to fail, but it did not.  I reinstalled the sonalert into a little panel that held two other sonalerts, screwed it up, put on the fabric cover.  I kept running out to the vane switch each step of the way, expecting a failure and not wishing to discover that when fully assembled.  So now it works.  Very un-satisfying solution to this.  I went and test flew it into a stall, and it didn't give me but 3 or 4 kts warning prior to stall (clean), but I'm going to let that dog lie.

Regarding all the advice and help you have all offered, thank you very much.  You have been very supportive.  Regarding the advice from PT20J and M201MKTurbo. those issues are somewhat moot now, but lacking any advice at the time, several days ago, somewhat of a Hail Mary,  I sprayed some contact cleaner into around the vane from the leading edge and by feel only, tried to spray the switch up through the access hole reaching in as deep as I could.  Well, what's done is done on that score.

I was intending to finish this note with, "Last call, leaving the pattern", but without a clear cause and corrective action, I am likely to be back.

Thanks all, stay safe.

Jer

Good to hear.    Another occasional failure mode for those is that the terminals of the sonalert short against the sheet metal of the roof.   It could be that taking it down and putting it back gave it some clearance, but if it does it again it's another possibility to check.

Posted
30 minutes ago, EricJ said:

Good to hear.    Another occasional failure mode for those is that the terminals of the sonalert short against the sheet metal of the roof.   It could be that taking it down and putting it back gave it some clearance, but if it does it again it's another possibility to check.

I glued a piece of plastic to the roof above the sonalert.

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