X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 24 Mar 2013 13:04:27 -0400 Message-ID: X-Original-Return-Path: Received: from mta41.charter.net ([216.33.127.83] verified) by logan.com (CommuniGate Pro SMTP 6.0.2) with ESMTP id 6137858 for lml@lancaironline.net; Sun, 24 Mar 2013 03:06:12 -0400 Received-SPF: pass receiver=logan.com; client-ip=216.33.127.83; envelope-from=troneill@charter.net Received: from imp10 ([10.20.200.15]) by mta41.charter.net (InterMail vM.8.01.05.02 201-2260-151-103-20110920) with ESMTP id <20130324070538.CYVV10143.mta41.charter.net@imp10> for ; Sun, 24 Mar 2013 03:05:38 -0400 Received: from [10.0.2.3] ([75.132.130.89]) by imp10 with smtp.charter.net id FK5d1l00B1vsS2r05K5eZj; Sun, 24 Mar 2013 03:05:38 -0400 X-Authority-Analysis: v=2.0 cv=foeE/yEf c=1 sm=1 a=5qs0V4O3azrKx6HjxWTekQ==:17 a=yUnIBFQkZM0A:10 a=hOpmn2quAAAA:8 a=098v5H7LTfEA:10 a=3oc9M9_CAAAA:8 a=o1OHuDzbAAAA:8 a=Ia-xEzejAAAA:8 a=oQX68sb5u4L4_B8R3yMA:9 a=CjuIK1q_8ugA:10 a=CVU0O5Kb7MsA:10 a=U8Ie8EnqySEA:10 a=hUswqBWy9Q8A:10 a=ILCZio5HsAgA:10 a=KRQ4u4k8_cA1XQy6aNcA:9 a=QEXdDO2ut3YA:10 a=_W_S_7VecoQA:10 a=DCgNK40K_1BTRuAO:21 a=5qs0V4O3azrKx6HjxWTekQ==:117 X-Auth-id: dHJvbmVpbGxAY2hhcnRlci5uZXQ= Subject: Re: [LML] Re: 360 fuel transfer References: From: Troneill Content-Type: multipart/alternative; boundary=Apple-Mail-3C2685F2-1BCA-43BF-816C-1DA825E268B6 X-Mailer: iPad Mail (10B141) In-Reply-To: X-Original-Message-Id: <315A416B-3BBB-4CA1-B744-9CF922C5843F@charter.net> X-Original-Date: Sun, 24 Mar 2013 02:05:40 -0500 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-3C2685F2-1BCA-43BF-816C-1DA825E268B6 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Thanks, and yes, I do. The float switch sends power to both pumps, or doesn'= t, to keep the header full. When I add a bypass (switch) around the float sw= itch that will send power to the two transfer pumps, and I will have to then= use the transfer pump switches to manually myself to keep the Header full. Terrence Sent from my iPad On Mar 23, 2013, at 5:49 PM, Sky2high@aol.com wrote: > Terrence, > =20 > I suggest you have individual switches for each pump that operate totally i= ndependent of the float circuits. > =20 > Grayhawk > =20 > In a message dated 3/23/2013 5:02:19 P.M. Central Daylight Time, troneill@= charter.net writes: > Angier, > Thanks for that experience, which made me realize I need a switch to bypas= s my header float switch, to be able to transfer fuel manually in case the f= loat switch fails in the Off position. > This LML list is a good thing. > Terrence >=20 > Sent from my iPad >=20 > On Mar 22, 2013, at 9:15 PM, "Greenbacks, UnLtd." wrote= : >=20 > > About 20min into todays' flight and with the transfer pump switches set t= o auto, the system failed. Actually it had failed before takeoff but I was u= naware since the header tank was full on takeoff. I observed the sight gauge= level drop to its normal pump on level and kept falling. The EI fuel gauge f= or the header tank agreed and kept falling. Normally the pumps come on autom= atically at about 7.5gal but not today so I continued the flight and operate= d the transfer pumps manually for the 2.5hr flight. About 5 min out from lan= ding I again turned on the transfer pumps manually and this time forgot to s= hut them off. :-( > > Needless to say fuel was being pumped overboard as I taxied into the han= gar.... > >=20 > > So what went wrong? The auto transfer system is controlled by a solid st= ate relay from Perhelion Design and it works great. > > However, the system failed due to the fact that one of the leads to the r= elay from the buss had somehow slipped off its terminal on the relay(these t= erminals are pointed down in this installation). A female spade connector th= at was obviously just loose enough to wiggle itself off, did so. In the end,= a simple fix but it reinforces the point that none of our building work sho= uld be taken for granted. Now the two power leads to the relay are secured w= ith clear heat shrink as well as lacing tape. > >=20 > > Angier Ames > > N4ZQ > > -- > > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.h= tml >=20 > -- > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.htm= l --Apple-Mail-3C2685F2-1BCA-43BF-816C-1DA825E268B6 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit
Thanks, and yes, I do. The float switch sends power to both pumps, or doesn't, to keep the header full. When I add a bypass (switch) around the float switch that will send power to the two transfer pumps, and I will have to then use the transfer pump switches to manually myself to keep the Header full.
Terrence

Sent from my iPad

On Mar 23, 2013, at 5:49 PM, Sky2high@aol.com wrote:

Terrence,
 
I suggest you have individual switches for each pump that operate totally independent of the float circuits.
 
Grayhawk
 
In a message dated 3/23/2013 5:02:19 P.M. Central Daylight Time, troneill@charter.net writes:
Angier,
Thanks for that experience, which made me realize I need a switch to bypass my header float switch, to be able to transfer fuel manually in case the float switch fails in the Off position.
This LML list is a good thing.
Terrence

Sent from my iPad

On Mar 22, 2013, at 9:15 PM, "Greenbacks, UnLtd." <N4ZQ@VERIZON.NET> wrote:

> About 20min into todays' flight and with the transfer pump switches set to auto, the system failed. Actually it had failed before takeoff but I was unaware since the header tank was full on takeoff. I observed the sight gauge level drop to its normal pump on level and kept falling. The EI fuel gauge for the header tank agreed and kept falling. Normally the pumps come on automatically at about 7.5gal but not today so I continued the flight and operated the transfer pumps manually for the 2.5hr flight. About 5 min out from landing I again turned on the transfer pumps manually and this time forgot to shut them off. :-(
> Needless to say fuel was being pumped overboard as I taxied into the hangar....
>
> So what went wrong? The auto transfer system is controlled by a solid state relay from Perhelion Design and it works great.
> However, the system failed due to the fact that one of the leads to the relay from the buss had somehow slipped off its terminal on the relay(these terminals are pointed down in this installation). A female spade connector that was obviously just loose enough to wiggle itself off, did so. In the end, a simple fix but it reinforces the point that none of our building work should be taken for granted. Now the two power leads to the relay are secured with clear heat shrink as well as lacing tape.
>
> Angier Ames
> N4ZQ
> --
> For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html

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