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  #1  
Old 11-04-2013, 09:00 AM
John Courte John Courte is offline
 
Join Date: Jul 2005
Location: Los Angeles, CA
Posts: 634
Default Magneto Mistake, part deux - An expensive lesson

A few days ago, I posted in this thread with a question about what happens when you leave the timing pin (makeshift or otherwise) in the back of a Slick magneto and pull the prop through a couple of times.

This is the answer:


It's a little more involved than that, and you can read the full comedy of errors on my build blog, but the bottom line is that this is an expensive lesson fortunately taught in ground school rather than during air work.

I'm now receiving a little over $300 worth of stuff from ACS because I made a mistake.

Due to other factors, I was also troubleshooting the wrong mag for nigh on three weeks, and so far these are my takeaways:

1: Pay attention to and follow procedures. Had I done so, this thread wouldn't exist.

2: Label connections. For whatever reason, I didn't label the L and R p-lead wires as such and have wasted valuable time because of it.

3: Assumptions can be wrong. If you get unexpected results based on an an assumption, throw out the assumption and check things upstream of it.

4: Don't discount the simple or the obvious. There is no magical mystery juice flowing through these engines that suddenly runs dry from time to time. The answer is there, you just haven't seen it yet.

I hope my adventures can help keep someone else from stepping in the same mud puddle that I did. On the plus side, assuming there is one to this debacle, the engine now runs smooth and strong, and returns some of the confidence I've lost over the last couple of weeks.
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  #2  
Old 11-04-2013, 09:07 AM
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Mark Dickens Mark Dickens is offline
 
Join Date: Apr 2012
Location: Collierville, TN (KFYE)
Posts: 1,475
Default

I got over making expensive mistakes a long time ago. If you're going to build a plane in your garage, and you are learning as you're building, you will make these mistakes. The trick is to find the mistakes before you get into the air. Yes, it's expensive, but you shrug it off and keep on keeping on!

Thanks for the post. Maybe, I'll avoid the same mistake...but only maybe!
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  #3  
Old 11-05-2013, 07:57 AM
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woodmanrog woodmanrog is offline
 
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Location: Florida
Posts: 781
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A wise man learns from the mistakes of others. Before tackling anything new, get in the habit of reading the forums for information based on experience. AND, send your dues to Doug ASAP!
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  #4  
Old 11-05-2013, 09:28 AM
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jjconstant jjconstant is offline
 
Join Date: Dec 2006
Location: Oakland CA
Posts: 771
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I LOVE numbers 3 and 4

Words to live by in this hobby!
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  #5  
Old 11-05-2013, 08:27 PM
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PeteP PeteP is offline
 
Join Date: Jun 2011
Location: Chesapeake, VA
Posts: 219
Default Mistakes

After many airplanes and to many years of building I have determined that is no such thing as a cheap mistake in this game! But you still need to learn from others no matter what.
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  #6  
Old 11-06-2013, 06:03 AM
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rzbill rzbill is offline
 
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Location: Asheville, NC
Posts: 2,751
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And my favorite...

Good judgement comes from experience. Experience comes from bad judgement.


When asked during the build "Do you know what you are doing?", my normal reply was "I will when I am finished."
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  #7  
Old 11-06-2013, 09:06 AM
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az_gila az_gila is offline
 
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
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2: Label connections. For whatever reason, I didn't label the L and R p-lead wires as such and have wasted valuable time because of it.


Something as simple as short lengths of red and green heatshrink could do this. No need for a label maker.
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