Mailing List flyrotary@lancaironline.net Message #36933
From: James Maher <deltaflyer@prodigy.net>
Subject: Re: [FlyRotary] Re: EC2 question
Date: Fri, 11 May 2007 14:50:31 -0700 (PDT)
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Al,
I would be very careful about adding any tantalum capacitors.
Back when I worked as an electronic technician I discovered the failure mode of these devices.
They start off with a little leakage current.
As they leak the get hotter.
The hotter they get the more they leak.
This continues until they build to critical temp and then explode
sending a molten projectile 10 feet or more.
I actually had some blowup while testing and they burnt a hole in the floor
10-20 feet away.
After that I always made sure that there was a metal cover over the unit being tested.
Just a word to the wise.
Jim

Al Gietzen <ALVentures@cox.net> wrote:
SNIP
 

47uf, 16V tantalum were added to each processor

Pin 8 of connector is now grounded.
Pin 28 of connector is now grounded.

Al


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