X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: Date: Fri, 06 Nov 2009 00:35:11 -0500 Message-ID: X-Original-Return-Path: Received: from imr-ma04.mx.aol.com ([64.12.206.42] verified) by logan.com (CommuniGate Pro SMTP 5.3c1) with ESMTP id 3950449 for lml@lancaironline.net; Thu, 05 Nov 2009 22:23:41 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.206.42; envelope-from=Sky2high@aol.com Received: from imo-ma04.mx.aol.com (imo-ma04.mx.aol.com [64.12.78.139]) by imr-ma04.mx.aol.com (8.14.1/8.14.1) with ESMTP id nA63N5iI025870 for ; Thu, 5 Nov 2009 22:23:05 -0500 Received: from Sky2high@aol.com by imo-ma04.mx.aol.com (mail_out_v42.5.) id q.cae.5311992e (14457) for ; Thu, 5 Nov 2009 22:23:02 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Thu, 5 Nov 2009 22:18:38 EST Subject: Re: [LML] Re: 290 Gear-Up electrical short? X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1257477518" X-Mailer: AOL 9.1 sub 5006 X-Spam-Flag:NO X-AOL-SENDER: Sky2high@aol.com -------------------------------1257477518 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Sven, Egads! So much for over automating functions. Interesting, because the pump motor doesn't like to run in both directions at the same time. However, since there is a pressure band in which the pressure switch will remain open - in this case, just long enough for the up side to start and break an over-center link - the result you mention is well within reason. But, it is impossible to imagine that full retraction of all the gear could take place. Dang, what a dangerous mess to have only one gear collapse on landing when the full belly in is so satisfying. Yes, "don't be too smart!" Grayhawk In a message dated 11/5/2009 8:20:46 P.M. Central Standard Time, sven.jerlhagen@gmail.com writes: I have seen this happen in a friends 360. There was a modified wiring: 1. From the gear selector up side there was a throttle position switch to start a buzzer (gear warning) 2. A float switch also energized the same buzzer for low fuel warning Now if you are a little low on gas when you enter final the fuel will slosh forward from the deceleration and close the float switch. The power will go back thru the low throttle switch and energize the gear up relay even though the gear selector is in down position. The gear down relay is off since the pressure switch is open on the down side In my friends case it only partly retracted one gear, which collapsed on rollout. Goes to show any wiring modificaion must be carefully analyzed, and dont be too smart :) Sven Jerlhagen SE-XOP -------------------------------1257477518 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Sven,

Egads! So much for over automating functions. Interesting= ,=20 because the pump motor doesn't like to run in both directions at the same= =20 time. However, since there is a pressure band in which the pres= sure=20 switch will remain open - in this case, just long enough for the up side= =20 to start and break an over-center link - the result you=20 mention is well within reason. But, it is impossible to im= agine=20 that full retraction of all the gear could take place.

Dang, what a dangerous mess to have only one gear collapse on la= nding=20 when the full belly in is so satisfying.

Yes, "don't be too smart!"

Grayhawk

In a message dated 11/5/2009 8:20:46 P.M. Central Standard Time,=20 sven.jerlhagen@gmail.com writes:

I have seen this happen in a friends 360. There was a modified=20 wiring:

1. From the gear selector up side there was a throttle position swi= tch to=20 start a buzzer (gear warning)

2. A float switch also energized the same buzzer for low fuel=20 warning

Now if you are a little low on gas when you enter final the fuel wi= ll=20 slosh forward from the deceleration and close the float switch. The= power=20 will go back thru the low throttle switch and energize the gear up relay= even=20 though the gear selector is in down position. The gear down relay is off= since=20 the pressure switch is open on the down side

In my friends case it only partly retracted one gear, whi= ch=20 collapsed on rollout. Goes to show any wiring modificaion must be carefu= lly=20 analyzed, and dont be too smart :)

Sven Jerlhagen

SE-XOP

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