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weight and balance question

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skidmk

Joined: 19 Nov 2007
Posts: 171
Location: Ottawa, Ontario

Posted: Wed Jul 13, 2016 12:02 pm Post subject: weight and balance question

Hi all,



My mech and I are looking to do an new weight balance.  Currently, I've replaced the 80 pound gill battery with 2 oddesy's up top in the old battery box.  



Before making the change, there was 55pounds in the tool box, 40 pounds in the IFF area, and  the 80 pound gill.  It feels nose heavy compared to my other l29, and another one I have flown.



The new config, removed the 55 out of the box, and the new oddysey's and the wiring adds up to about 53.  negligible change.



We looked at he way the w&b was done, and the datum used appears to be the nose wheel center.  That puts almost 200 pounds in the "negative" of the w&b calc.  We looked in the book and the diagrams are difficult to read, but it would seem the datum is at the nose cone tip, or at the bulkhead right behind it.



My question, anyone know the approved area for the datum?



thanks



Skidmk

_________________
Mike "Skidmk" Bourget
Ottawa, Ontario

schwartzcompany(at)att.ne
Guest

Posted: Wed Jul 13, 2016 12:05 pm Post subject: weight and balance question

R model or c?    Tool box??



Sent from Yahoo Mail on Android

 

  	  Quote: 	
		    On Wed, Jul 13, 2016 at 15:02, skidmk

<skidmk(at)gmail.com> wrote:

   --> L29-List message posted by: "skidmk" <[url=javascript:return]skidmk(at)gmail.com[/url]>



Hi all,



My mech and I are looking to do an new weight balance.  Currently, I've replaced the 80 pound gill battery with 2 oddesy's up top in the old battery box.  



Before making the change, there was 55pounds in the tool box, 40 pounds in the IFF area, and  the 80 pound gill.  It feels nose heavy compared to my other l29, and another one I have flown.



The new config, removed the 55 out of the box, and the new oddysey's and the wiring adds up to about 53.  negligible change.



We looked at he way the w&b was done, and the datum used appears to be the nose wheel center.  That puts almost 200 pounds in the "negative" of the w&b calc.  We looked in the book and the diagrams are difficult to read, but it would seem the datum is at the nose cone tip, or at the bulkhead right behind it.



My question, anyone know the approved area for the datum?



thanks



Skidmk



--------

Mike "Skidmk" Bourget

Ottawa, Ontario





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=458131#458131



 --> <a href="http://www.matronics.com/Navigator?L29-List" target="_               -Matt Dralle, List Admin.=======

skidmk

Joined: 19 Nov 2007
Posts: 171
Location: Ottawa, Ontario

Posted: Wed Jul 13, 2016 12:15 pm Post subject: Re: weight and balance question

c model tool box is the old battery box, that had been replaced.

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_________________
Mike "Skidmk" Bourget
Ottawa, Ontario

schwartzcompany(at)att.ne
Guest

Posted: Wed Jul 13, 2016 12:31 pm Post subject: weight and balance question

Where is the new battery box



Sent from Yahoo Mail on Android

 

  	  Quote: 	
		    On Wed, Jul 13, 2016 at 15:15, skidmk

<skidmk(at)gmail.com> wrote:

   --> L29-List message posted by: "skidmk" <[url=javascript:return]skidmk(at)gmail.com[/url]>



c model tool box is the old battery box, that had been replaced.



--------

Mike "Skidmk" Bourget

Ottawa, Ontario





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=458133#458133





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skidmk

Joined: 19 Nov 2007
Posts: 171
Location: Ottawa, Ontario

Posted: Wed Jul 13, 2016 12:36 pm Post subject: Re: weight and balance question

as per the pic, on the nose compartment next to the O2 Cyl's

_________________
Mike "Skidmk" Bourget
Ottawa, Ontario

L29delfin(at)yahoo.com
Guest

Posted: Wed Jul 13, 2016 12:44 pm Post subject: weight and balance question

Call.me.on confused

5639408600

On July 13, 2016 3:20:23 PM "skidmk" <skidmk(at)gmail.com> wrote:



 	  Quote: 	
		   



 c model tool box is the old battery box, that had been replaced.



 --------

 Mike &quot;Skidmk&quot; Bourget

 Ottawa, Ontario





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=458133#458133





 Attachments:



 http://forums.matronics.com//files/img_5683_112.jpg

skidmk

Joined: 19 Nov 2007
Posts: 171
Location: Ottawa, Ontario

Posted: Wed Jul 13, 2016 1:00 pm Post subject: Re: weight and balance question

sorry for those I"ve confused.  To keep it simple.  We are looking for the DATUM used to do a weight and balance.  I cannot tell for sure (my books are tough to tell from) but it looks like the datum is at the tip of the nose cone, or it is at the bulkhead where the nose cone attaches.



comments?



some have a readable copy of the datum and measurement diagrams.?

_________________
Mike "Skidmk" Bourget
Ottawa, Ontario

skidmk

Joined: 19 Nov 2007
Posts: 171
Location: Ottawa, Ontario

Posted: Wed Jul 13, 2016 1:02 pm Post subject: Re: weight and balance question

sorry for those I"ve confused.  To keep it simple.  We are looking for the DATUM used to do a weight and balance.  I cannot tell for sure (my books are tough to tell from) but it looks like the datum is at the tip of the nose cone, or it is at the bulkhead where the nose cone attaches.



comments?



someone have a readable copy of the datum and measurement diagrams.?

_________________
Mike "Skidmk" Bourget
Ottawa, Ontario

L29delfin(at)yahoo.com
Guest

Posted: Wed Jul 13, 2016 1:48 pm Post subject: weight and balance question

We need more details to help with w/b.

Is the IFF unit still in the compartment . If not what if anything is 

there.   Original battery compartment was in left top shelf in nose 

adjacent to oxygen bottles. Are bottles still there? You eluded to making 

battery compartment into a tool box.  Where then is the battery now.

On July 13, 2016 16:05:12 "skidmk" <skidmk(at)gmail.com> wrote:



 	  Quote: 	
		   



 sorry for those I"ve confused.  To keep it simple.  We are looking for the 

 DATUM used to do a weight and balance.  I cannot tell for sure (my books 

 are tough to tell from) but it looks like the datum is at the tip of the 

 nose cone, or it is at the bulkhead where the nose cone attaches.



 comments?



 someone have a readable copy of the datum and measurement diagrams.?



 --------

 Mike &quot;Skidmk&quot; Bourget

 Ottawa, Ontario





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=458143#458143

tr.9(at)westnet.com.au
Guest

Posted: Wed Jul 13, 2016 2:22 pm Post subject: weight and balance question

Did you remove the weights out of the tail just below the rudder in the tail cone I think they are?



Sent from my iPad



 	  Quote: 	
		   On Jul 14, 2016, at 6:02 AM, skidmk <skidmk(at)gmail.com> wrote:

 

 

 

 Hi all,

 

 My mech and I are looking to do an new weight balance.  Currently, I've replaced the 80 pound gill battery with 2 oddesy's up top in the old battery box.  

 

 Before making the change, there was 55pounds in the tool box, 40 pounds in the IFF area, and  the 80 pound gill.  It feels nose heavy compared to my other l29, and another one I have flown.

 

 The new config, removed the 55 out of the box, and the new oddysey's and the wiring adds up to about 53.  negligible change.

 

 We looked at he way the w&b was done, and the datum used appears to be the nose wheel center.  That puts almost 200 pounds in the "negative" of the w&b calc.  We looked in the book and the diagrams are difficult to read, but it would seem the datum is at the nose cone tip, or at the bulkhead right behind it.

 

 My question, anyone know the approved area for the datum?

 

 thanks

 

 Skidmk

 

 --------

 Mike &quot;Skidmk&quot; Bourget

 Ottawa, Ontario

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=458131#458131

skidmk

Joined: 19 Nov 2007
Posts: 171
Location: Ottawa, Ontario

Posted: Wed Jul 13, 2016 3:55 pm Post subject: Re: weight and balance question

The iff compartment, currently holds, an 80 pound gill that is dead.  Together with about 40 pounds of ballast.



the original battery box, (rebuilt into a tool box) is now holding two Odysey 925's.  (weight of 53 pounds) these batteries, will now be the onboard batteries, and they have replaced 55 pounds of lead ballast that was in the battery/tool box.



I am unaware of plates in the tail.  in the tail cone?



thanks

_________________
Mike "Skidmk" Bourget
Ottawa, Ontario

skidmk

Joined: 19 Nov 2007
Posts: 171
Location: Ottawa, Ontario

Posted: Wed Jul 13, 2016 3:56 pm Post subject: Re: weight and balance question

The iff compartment, currently holds, an 80 pound gill that is dead.  Together with about 40 pounds of ballast.



the original battery box, (rebuilt into a tool box) is now holding two Odysey 925's.  (weight of 53 pounds) these batteries, will now be the onboard batteries, and they have replaced 55 pounds of lead ballast that was in the battery/tool box.



I am unaware of plates in the tail.  in the tail cone?



thanks

_________________
Mike "Skidmk" Bourget
Ottawa, Ontario

L29delfin(at)yahoo.com
Guest

Posted: Wed Jul 13, 2016 5:30 pm Post subject: weight and balance question

If you putting the 2 batteries back in original battery container and then 

put that container back in the battery hole you should be fine. Then put 

the IFF box back and the weight will be so close to original there should 

be no problem

On July 13, 2016 7:04:47 PM "skidmk" <skidmk(at)gmail.com> wrote:



 	  Quote: 	
		   



 The iff compartment, currently holds, an 80 pound gill that is dead.  

 Together with about 40 pounds of ballast.



 the original battery box, (rebuilt into a tool box) is now holding two 

 Odysey 925's.  (weight of 53 pounds) these batteries, will now be the 

 onboard batteries, and they have replaced 55 pounds of lead ballast that 

 was in the battery/tool box.



 I am unaware of plates in the tail.  in the tail cone?



 thanks



 --------

 Mike &quot;Skidmk&quot; Bourget

 Ottawa, Ontario





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=458149#458149

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