From: "Jeff Whaley jwhaley@datacast.com" <flyrotary@lancaironline.net>
Received-SPF: none
 receiver=logan.com; client-ip=104.47.36.48; envelope-from=jwhaley@datacast.com
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: RE: Alternator Damaged - Internal Short
Thread-Topic: Alternator Damaged - Internal Short
Thread-Index: AQHUKm7HC3xR/6kZHkKoIFCCnoL6waSsr3wwgAABCuA=
Date: Thu, 2 Aug 2018 17:04:18 +0000
Message-ID:
 <MW2PR18MB2235990117056324027B2EC5C42C0@MW2PR18MB2235.namprd18.prod.outlook.com>
References: <listdigest-11456597@logan.com>
    <MW2PR18MB2235BBEAD2EC13862FA2403BC42C0@MW2PR18MB2235.namprd18.prod.outlook.com>
 <MW2PR18MB22357F496B731B9E41588C6CC42C0@MW2PR18MB2235.namprd18.prod.outlook.com>
In-Reply-To:
 <MW2PR18MB22357F496B731B9E41588C6CC42C0@MW2PR18MB2235.namprd18.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
received-spf: None (protection.outlook.com: datacast.com does not designate
 permitted sender hosts)
spamdiagnosticoutput: 1:99
spamdiagnosticmetadata: NSPM
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: dd221f7d-0222-4199-1052-08d5f899fc5f
X-MS-Exchange-CrossTenant-originalarrivaltime: 02 Aug 2018 17:04:18.8474
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: a07f70c7-0440-4b97-b25f-a93dca3f0980
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR18MB2185

Charlie, I never the saw the idiot light come ON ... the idiot was too busy=
 flying the airplane.
Jeff

-----Original Message-----
From: Jeff Whaley=20
Sent: August-02-18 1:03 PM
To: Rotary motors in aircraft
Subject: RE: Alternator Damaged - Internal Short

Hi Tracy, that is an interesting comment.  Sounds like a fuse would have be=
en a better bet than the alternator solenoid - but what do you replace the =
battery solenoid with?
Jeff

The sequence of failure is a question.  The relay failing and going open mi=
ght have been the first in the chain.  Many alternators will fail internall=
y when all load is removed due to over volting.  Most Automotive alternator=
s were not designed for no load operation.

I've never been an advocate for either battery or alternator solenoid use. =
 They cause more problems than they solve.

Tracy

-----Original Message-----
From: Jeff Whaley=20
Sent: August-02-18 10:41 AM
To: Rotary motors in aircraft
Subject: Alternator Damaged - Internal Short

Last Thursday I decided to try my cooling on a hot day 32C (90F); orbiting =
the airport, the cooling wasn't too bad but while waiting for the temps to =
stabilize I smelled smoke so landed immediately.  Saw a bit of smoke exitin=
g the oil cooler plenum so thought I was baking some fiberglass.
On the weekend I did a more thorough inspection and found the battery mains=
 cable burned where attached to my alternator cut-out relay and the relay f=
ried to the point that the input terminal was loose.  The connections staye=
d in place but open-circuited the relay - so the engine never skipped a bea=
t and I was unaware there was an electrical problem at the time. Only repor=
ting this now as it took me a while to get the alternator tested.
Jeff