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Removal of Main Gear Doors

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barry.collman(at)air-brit
Guest

Posted: Sun Jan 09, 2011 11:24 am Post subject: 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

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barry.collman(at)air-brit
Guest

Posted: Sun Jan 09, 2011 11:41 am Post subject: Removal of Main Gear Doors

Hello All,



Just thought of another question here!

For those Turbo Commanders that retain these doors, do they remain in the

down position when the gear is down?

I think not, as most photos taken before 1992 show them in the retracted, or

up, position.



Best Regards,

Barry



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deneals(at)deneals.com
Guest

Posted: Sun Jan 09, 2011 2:54 pm Post subject: Removal of Main Gear Doors

If I recall correctly, the close close after the gear is extended.  One of

the preflight items is to manually (with one's hands) to force open one set

(I forget which side) to check the pressure gauge.

-- 

Deneal Schilmeister



On 1/9/11 1:37 PM, "Barry Collman" <barry.collman(at)air-britain.co.uk> wrote:



 	  Quote: 	
		   For those Turbo Commanders that retain these doors, do they remain in the

 down position when the gear is down?

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moe-rosspistons(at)hotmai
Guest

Posted: Sun Jan 09, 2011 3:41 pm Post subject: Removal of Main Gear Doors

Barry,



They close when the gear is down, however, a lot of the ones that I see 

around seem to sag a bit.



Moe

N680RR



--------------------------------------------------

From: "Barry Collman" <barry.collman(at)air-britain.co.uk>

Sent: Sunday, January 09, 2011 11:37 AM

To: <commander-list(at)matronics.com>

Subject: RE: Removal of Main Gear Doors



[quote] 

 <barry.collman(at)air-britain.co.uk>



 Hello All,



 Just thought of another question here!

 For those Turbo Commanders that retain these doors, do they remain in the

 down position when the gear is down?

 I think not, as most photos taken before 1992 show them in the retracted, 

 or

 up, position.



 Best Regards,

 Barry



 --

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swperk

Joined: 18 Feb 2010
Posts: 30

Posted: Sun Jan 09, 2011 9:59 pm Post subject: 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



--

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barry.collman(at)air-brit
Guest

Posted: Mon Jan 10, 2011 8:11 am Post subject: Removal of Main Gear Doors

Hi Stan,



Grateful thanks, and also to Deneal & Moe.



Very Best Regards,

Barry



--

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BillLeff1(at)aol.com
Guest

Posted: Thu Jan 13, 2011 8:50 pm Post subject: 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(at)air-britain.co.uk writes:

 [quote]-->    Commander-List message posted by: "Barry Collman"    <barry.collman(at)air-britain.co.uk>



Hi Stan,



Grateful    thanks, and also to Deneal & Moe.



Very Best    Regards,

Barry



--

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barry.collman(at)air-brit
Guest

Posted: Fri Jan 14, 2011 6:25 am Post subject: Removal of Main Gear Doors

Thanks Bill!

From: owner-commander-list-server(at)matronics.com [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of BillLeff1(at)aol.com

Sent: 14 January 2011 04:47

To: commander-list(at)matronics.com

Subject: Re: 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(at)air-britain.co.uk (barry.collman(at)air-britain.co.uk) writes:

[quote]

--> Commander-List message posted by: "Barry Collman" <barry.collman(at)air-britain.co.uk (barry.collman(at)air-britain.co.uk)>

Hi Stan,

Grateful thanks, and also to Deneal & Moe.

Very Best Regards,

Barry

--

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nick(at)container.com
Guest

Posted: Fri Jan 14, 2011 9:50 am Post subject: 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(at)matronics.com [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of BillLeff1(at)aol.com

 Sent: Thursday, January 13, 2011 8:47 PM

 To: commander-list(at)matronics.com

 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.[b] Have a smooth trip west Harry.[/b]  

    

   

    

Bill Leff  

    

   

      

In a message dated 1/10/2011 11:12:05 A.M. Eastern Standard Time, barry.collman(at)air-britain.co.uk writes:  

  [quote]  

--> Commander-List message posted by: "Barry Collman" <barry.collman(at)air-britain.co.uk>

 

 Hi Stan,

 

 Grateful thanks, and also to Deneal & Moe.

 

 Very Best Regards,

 Barry

 

 --

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