---------------------------------------------------------- Commander-List Digest Archive --- Total Messages Posted Fri 01/14/11: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:25 AM - Re: Removal of Main Gear Doors (Barry Collman) 2. 09:50 AM - Re: Removal of Main Gear Doors (Nick Martin) ________________________________ Message 1 _____________________________________ Time: 06:25:17 AM PST US From: "Barry Collman" Subject: RE: Commander-List: Removal of Main Gear Doors Thanks Bill! From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of BillLeff1@aol.com Sent: 14 January 2011 04:47 Subject: Re: Commander-List: Removal of Main Gear Doors Try Eagle Creek, I think it is their STC. Personally I think it is a bad idea to remove the doors. It slows the aircraft (nearly 10 knots), it is noisier in the cabin, it allows a lot of exhaust residue to collect in the wheel well. I have never found, in my 39 years of flying Turbo Commanders, that the maintenance is that be of a deal. A properly maintained aircraft will never have a problem. It has always amazed me that people will spend $60K+ to install props that will increase the speed 10 knots and then spend money to slow the aircraft down by taking the gear doors off!!!! Makes no sense to me. About Harry, I will miss him, he was a friend of many years and he like I loved the old ones. Have a smooth trip west Harry. Bill Leff In a message dated 1/10/2011 11:12:05 A.M. Eastern Standard Time, barry.collman@air-britain.co.uk writes: Hi Stan, Grateful thanks, and also to Deneal & Moe. Very Best Regards, Barry -----Original Message----- From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of Stan Sent: 10 January 2011 05:56 Subject: RE: Commander-List: Removal of Main Gear Doors Hi Barry, I know this isn't an answer to either of your questions, but I've done some investigating into these clamshell doors, and here's what I've found out, thanks to Morris: The advantage to having the clamshell doors is about a 5 knot gain in cruise speed. The disadvantage is that the increased complexity of the sequencing to open and close the clamshells at just the right time increases gear operating times from the six-second range to about 20 seconds. There's also more chance of something not sequencing correctly, the doors being out of adjustment, etc. All things considered, I'd rather *not* have them. More to your original question: I found an ad for a 690B for sale, and it listed several STCs that had been done (including the clamshell door removal, which it identified as SA8214SW). I found only one of the four STCs on the FAA that was both present and correct: the one for replacement of the exhaust ejectors. So you may have the right info, and it's just the FAA database that's a problem. Regards, Stan -----Original Message----- From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of Barry Collman Sent: Sunday, January 09, 2011 11:20 AM Subject: Commander-List: Removal of Main Gear Doors --> Hello All, Does anybody know the STC No. that allows the removal of the main gear aft wheel well doors on Turbo Commanders? My database reflects that 690B s/n 11522 was used as N691WM for obtaining the STC in February 1992 and the STC subsequently issued was No. SA8214SW. However, a suitable search of the FAA's website for STC's fails to find this. Also, does anybody know the weight saving that results? Best Regards, Barry se the ies ay - MATRONICS WEB FORUMS - List Contribution Web Site p; ________________________________ Message 2 _____________________________________ Time: 09:50:33 AM PST US From: "Nick Martin" Subject: RE: Commander-List: Removal of Main Gear Doors I agree with Bill ..The gear doors are not a problem as long as you keep the actuators clean (wiped down on every preflight)..Nick ,N674NM _____ From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of BillLeff1@aol.com Sent: Thursday, January 13, 2011 8:47 PM Subject: Re: Commander-List: Removal of Main Gear Doors Try Eagle Creek, I think it is their STC. Personally I think it is a bad idea to remove the doors. It slows the aircraft (nearly 10 knots), it is noisier in the cabin, it allows a lot of exhaust residue to collect in the wheel well. I have never found, in my 39 years of flying Turbo Commanders, that the maintenance is that be of a deal. A properly maintained aircraft will never have a problem. It has always amazed me that people will spend $60K+ to install props that will increase the speed 10 knots and then spend money to slow the aircraft down by taking the gear doors off!!!! Makes no sense to me. About Harry, I will miss him, he was a friend of many years and he like I loved the old ones. Have a smooth trip west Harry. Bill Leff In a message dated 1/10/2011 11:12:05 A.M. Eastern Standard Time, barry.collman@air-britain.co.uk writes: Hi Stan, Grateful thanks, and also to Deneal & Moe. Very Best Regards, Barry -----Original Message----- From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of Stan Sent: 10 January 2011 05:56 Subject: RE: Commander-List: Removal of Main Gear Doors Hi Barry, I know this isn't an answer to either of your questions, but I've done some investigating into these clamshell doors, and here's what I've found out, thanks to Morris: The advantage to having the clamshell doors is about a 5 knot gain in cruise speed. The disadvantage is that the increased complexity of the sequencing to open and close the clamshells at just the right time increases gear operating times from the six-second range to about 20 seconds. There's also more chance of something not sequencing correctly, the doors being out of adjustment, etc. All things considered, I'd rather *not* have them. More to your original question: I found an ad for a 690B for sale, and it listed several STCs that had been done (including the clamshell door removal, which it identified as SA8214SW). I found only one of the four STCs on the FAA that was both present and correct: the one for replacement of the exhaust ejectors. So you may have the right info, and it's just the FAA database that's a problem. Regards, Stan -----Original Message----- From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of Barry Collman Sent: Sunday, January 09, 2011 11:20 AM Subject: Commander-List: Removal of Main Gear Doors --> Hello All, Does anybody know the STC No. that allows the removal of the main gear aft wheel well doors on Turbo Commanders? My database reflects that 690B s/n 11522 was used as N691WM for obtaining the STC in February 1992 and the STC subsequently issued was No. SA8214SW. However, a suitable search of the FAA's website for STC's fails to find this. Also, does anybody know the weight saving that results? Best Regards, Barry se the ies ay - MATRONICS WEB FORUMS - List Contribution Web Site p; ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message commander-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Commander-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/commander-list Browse Digests http://www.matronics.com/digest/commander-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.