X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 18 Apr 2008 02:27:56 -0400 Message-ID: X-Original-Return-Path: Received: from smtp-ext-01.mx.pitdc1.expedient.net ([206.210.69.141] verified) by logan.com (CommuniGate Pro SMTP 5.2.2) with ESMTPS id 2861009 for lml@lancaironline.net; Thu, 17 Apr 2008 22:43:17 -0400 Received-SPF: none receiver=logan.com; client-ip=206.210.69.141; envelope-from=rpastusek@htii.com Received: from dlhtpax009 (static-71-178-198-10.washdc.fios.verizon.net [71.178.198.10]) by smtp-ext-01.mx.pitdc1.expedient.net (Postfix) with ESMTPA id C21DF7C4F4 for ; Thu, 17 Apr 2008 22:42:40 -0400 (EDT) Reply-To: From: "Robert Pastusek" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Re: MAC servo wire connections X-Original-Date: Thu, 17 Apr 2008 22:42:36 -0400 Organization: Holmes-Tucker International, Inc. X-Original-Message-ID: <021801c8a0fd$dd375460$97a5fd20$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0219_01C8A0DC.5625B460" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcigqQExczOhtnT8REyK0BXT83493gAUuNWA Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_0219_01C8A0DC.5625B460 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Bob Pastusek wrote: I used "standard" electronic 12v converters, available at Radio Shack or any electronic parts store I used a bigger converter that I got from Lancair which feeds everything that wants 12V. It popped the breaker one day. I was very glad I hadn't fused it. Hasn't happened again. In retrospect, I would be happier if there were nothing hung off that converter but, say, the pitch trim. What is "stall current". Is that max current? Do you think it's down around an amp or two? Colyn, I don't have the equipment to accurately measure the actual current load just before the trim motor stalls (under load), but I'm guessing its between one and two amps based on the measurements I was able to take. Although this is a bit above the rated power for the 12 volt converters, this current lasts for only a very brief period and didn't seem to hurt the other electronic components. In practice, I don't intend that the trim motor stall under load; this was just my "worst case" test scenario. Bob ------=_NextPart_000_0219_01C8A0DC.5625B460 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Bob Pastusek wrote:

 

I used “standard” electronic 12v converters, = available at Radio Shack or any electronic parts store

 

I used a bigger converter that I got from Lancair which = feeds everything that wants 12V.

It popped the breaker one day.  I was very glad I = hadn't fused it.   Hasn't happened again.

 

In retrospect, I would be happier if there were nothing = hung off that converter but, say, the pitch trim.

What is "stall current".  Is that max current?  Do you think it's down around an amp or = two?

 

Colyn,

 

I don’t have the equipment to accurately measure = the actual current load just before the trim motor stalls (under load), but = I’m guessing its between one and two amps based on the measurements I was able to = take. Although this is a bit above the rated power for the 12 volt converters, = this current lasts for only a very brief period and didn’t seem to hurt = the other electronic components. In practice, I don’t intend that the trim = motor stall under load; this was just my “worst case” test = scenario.


Bob

 

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