X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 23 Jan 2010 15:20:22 -0500 Message-ID: X-Original-Return-Path: Received: from col0-omc3-s14.col0.hotmail.com ([65.55.34.152] verified) by logan.com (CommuniGate Pro SMTP 5.3.1) with ESMTP id 4092600 for lml@lancaironline.net; Fri, 22 Jan 2010 18:46:34 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.55.34.152; envelope-from=bill_kennedy_3@hotmail.com Received: from COL108-W22 ([65.55.34.137]) by col0-omc3-s14.col0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Fri, 22 Jan 2010 15:46:00 -0800 X-Original-Message-ID: X-Original-Return-Path: bill_kennedy_3@hotmail.com Content-Type: multipart/alternative; boundary="_c0444180-2a1a-440c-a4d6-3962c2219e53_" X-Originating-IP: [71.111.118.215] From: Bill Kennedy X-Original-To: Subject: RE: [LML] Re: Airspeed sensing switch needed X-Original-Date: Fri, 22 Jan 2010 15:45:59 -0800 Importance: Normal In-Reply-To: References: MIME-Version: 1.0 X-OriginalArrivalTime: 22 Jan 2010 23:46:00.0182 (UTC) FILETIME=[0CF27160:01CA9BBD] --_c0444180-2a1a-440c-a4d6-3962c2219e53_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I've got a gear pump circuit breaker. Pop it and the pump won't run=2C gear= won't extend. Also=2C though my approach speed is well below 90KIAS=2C I'm likely to set = my gear-not-down sensor to 100KIAS. When I add a sensor for preventing gear= retraction on the ground=2C it will be around 60KIAS. It's worth the extra= pressure gadget to have the two speeds set just right. To: lml@lancaironline.net Date: Fri=2C 22 Jan 2010 17:08:55 -0500 From: troneill@charter.net Subject: [LML] Re: Airspeed sensing switch needed Thanks for the info=2C Randy.I have my airspeed sensing switch set a 90 kno= ts=2C in the gear-up circuit=2C so that no matter where the gear switch is= =2C it can't raise the gear unless the airspeed is greater than 90 knots.Sa= me on landing. I fi forget to put the gear switch to down=2C the gear will= come down anyway at 90 knots.The only downside (no pun intended) is that s= hould I want to make a gear-su forced landing=2C I couldn't... and have con= sidered adding a bypass into the circuit.Any thoughts on that/Terrence L235= /320 N211AL To: lml@lancaironline.net Date: Thu=2C 21 Jan 2010 16:53:05 -0500 From: randylsnarr@yahoo.com Subject: [LML] Re: Airspeed sensing switch needed Terrence=2C I have two sensing switches in my airplane. One used as a gear up warning f= or landing like is being discussed=2C the other is exactly what you describ= ed. Both are plumbed into the pitot static system and are adjustable with a= screwdriver under the pilot side panel. The squat switch opens the gear up= circuit under 70 kts. I test it often on take off- I rotate and go gear up= while the AS is low and the gear wont come up=2C when the AS hits 80 or s= o up they come. I don't think these should be flying without a gear up squa= t switch of some kind. I am embarrased to admit I have already inadvertentl= y tested mine. Testing the gear on stands and used the dump valve to drop t= he gear and left the switch up. Started the plane a few days later and noti= ce the switch in the up position while sitting idling on the ramp. I almost= fainted... dropped the switch and closed the dump valve and then sat and t= hought about it........Glad I had one installed. My friend Dick Mitchel was= not so lucky. He raised the gear in front of the hanger and dropped the pl= ane on the ground while it was running. It is way too easy to do. I certifi= ed crowd has that point right... Both cost me nothing as my neighbor is in the appliance business. He had a = shoe box filled with those and he gave me 2. They are a few ounces of preve= ntion against stupidity of which most of us on rare occasions are afflicted= by... Randy Snarr N694RS 235/320 --- On Mon=2C 1/18/10=2C Terrence O'Neill wrote: From: Terrence O'Neill Subject: [LML] Re: Airspeed sensing switch needed To: lml@lancaironline.net Date: Monday=2C January 18=2C 2010=2C 6:43 AM Bill=2CLurking because I share this interest.What are the pros and cons of = a simple airspeed sensing switch that just interrupts the gear-up switch ci= rcuit until a selected airspeed ... i.e. about 90 knots?TerrenceL235/320 N2= 11AL On Jan 16=2C 2010=2C at 7:28 AM=2C Bill Kennedy wrote:I'm going to build th= e gear not down warning system suggested by Randy Stuart in an earlier emai= l. I thought Aircraft Spruce had a airspeed sensing switch=2C but I couldn'= t find it in their catalog. Can any of you help me find a source for the pr= essure switch? I've never had a close call with the gear in three plus thousand hours of r= etractable time=2C but I've always been a little uneasy with no warning sys= tem in my LNC2. I had hoped that I could talk Blue Mountain Avionics into b= uilding a warning system into their EFIS=2C but that didn't work out. Randy= 's system looks great to me and I'm eager to try it. I've attached Randy's = drawing just in case others might want to revisit the idea. Thanks -- Bill Kennedy -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html = --_c0444180-2a1a-440c-a4d6-3962c2219e53_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I've got a gear pump circuit breaker. Pop it and the pump won't run=2C gear= won't extend.

Also=2C though my approach speed is well below 90KIAS= =2C I'm likely to set my gear-not-down sensor to 100KIAS. When I add a sens= or for preventing gear retraction on the ground=2C it will be around 60KIAS= . It's worth the extra pressure gadget to have the two speeds set just righ= t.

To: lml@lancaironline.net
Date: Fri=2C= 22 Jan 2010 17:08:55 -0500
From: troneill@charter.net
Subject: [LML]= Re: Airspeed sensing switch needed

Thanks for the info=2C Randy.
I have my airspeed sensing switch set a 9= 0 knots=2C in the gear-up circuit=2C so that no matter where the gear switc= h is=2C it can't raise the gear unless the airspeed is greater than 90 knot= s.
Same on landing.  =3BI fi forget to put the gear switch to= down=2C the gear will come down anyway at 90 knots.
The only dow= nside (no pun intended) is that should I want to make a gear-su forced land= ing=2C I couldn't... and have considered adding a bypass into the circuit.<= /div>
Any thoughts on that/
Terrence =3B
L235/3= 20 N211AL



To: =3Blml@lancaironline.net
Date: Thu=2C 21 Jan 2010 16:53:05 -0500
F= rom: =3Brandylsnarr@yahoo.com
Subject: [LML] Re: A= irspeed sensing switch needed

Terrence=2C
I have two= sensing switches in my airplane. One used as a gear up warning for landing= like is being discussed=2C the other is exactly what you described. Both a= re plumbed into the pitot static system and are adjustable with a screwdriv= er under the pilot side panel. The squat switch opens the gear up circuit u= nder 70 kts. I test it often on take off- I rotate and go gear up while the= AS is low and the gear wont =3B come up=2C when the AS hits 80 or so u= p they come. I don't think these should be flying without a gear up squat s= witch of some kind. I am embarrased to admit I have already inadvertently t= ested mine. Testing the gear on stands and used the dump valve to drop the = gear and left the switch up. Started the plane a few days later and notice = the switch in the up position while sitting idling on the ramp. I almost fa= inted... dropped the switch and closed the dump valve and then sat and thou= ght about it........Glad I had one installed. My friend Dick Mitchel was no= t so lucky. He raised the gear in front of the hanger and dropped the plane= on the ground while it was running. It is way too easy to do. I certified = crowd has that point right...
Both cost me nothing as my neighbor is in = the appliance business. He had a shoe box filled with those and he gave me = 2. They are a few ounces of prevention against stupidity of which most of u= s on rare occasions are afflicted by...

Randy Snarr
N694RS
235= /320

--- On =3B<= b>Mon=2C 1/18/10=2C Terrence O'Neill =3B<=3Btroneill@= charter.net>=3B = =3Bwrote:

From: Terrence O'Neill <=3Btroneill@charter.net>=3B
Subject: [LML] Re: Airspeed sensing= switch needed
To: =3Blml@lancaironline.net
Dat= e: Monday=2C January 18=2C 2010=2C 6:43 AM

Bill=2C
Lurking because I share this interest.
What are= the pros and cons of a simple airspeed sensing switch that just interrupts= the gear-up switch circuit until a selected airspeed ... i.e. about 90 kno= ts?
Terrence
L235/320 N211AL

On= Jan 16=2C 2010=2C at 7:28 AM=2C Bill Kennedy wrote:

I'm going to build the gear not down warning system suggested by Ran= dy Stuart in an earlier email. I thought Aircraft Spruce had a airspeed sen= sing switch=2C but I couldn't find it in their catalog. Can any of you help= me find a source for the pressure switch?

I've never had a close ca= ll with the gear in three plus thousand hours of retractable time=2C but I'= ve always been a little uneasy with no warning system in my LNC2. I had hop= ed that I could talk Blue Mountain Avionics into building a warning system = into their EFIS=2C but that didn't work out. Randy's system looks great to = me and I'm eager to try it. I've attached Randy's drawing just in case othe= rs might want to revisit the idea.

Thanks -- Bill Kennedy
&= lt=3BGear Warning 1.JPG>=3B--
For archives and unsub =3Bhttp://mail.lancairo= nline.net:81/lists/lml/List.html



= = --_c0444180-2a1a-440c-a4d6-3962c2219e53_--