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Baggage station for W&B

 
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bakerocb



Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

PostPosted: Sat Apr 15, 2017 7:38 am    Post subject: Baggage station for W&B Reply with quote

4/15/2017

Hello Steve, Sorry for the slow response -- a few alligators crawled out of
the swamp and had to be beat back down.

You wrote: "The builder of my plane, Richard Kindig had the baggage station
at 91 in."

It does not appear logical to me that the center of the baggage compartment
weight would be located in front of the wing aft spar location.

If your tri cycle landing gear plane was built according to the construction
manual the baggage compartment exists from the aft face of the aft wing spar
at station 92.8 inches to the aft baggage compartment bulkhead at station
111.0 inches. That is a distance of 18.2 inches.

If you assume that the weight of the items in the baggage compartment are
distributed evenly fore and aft then the center of the weight in the baggage
compartment is going to be 9.1 inches aft of the aft face of the aft wing
spar or at station 101.9 inches.

My records show that I am using a measured 96 inches for my plane as the
centroid of the baggage weight location. Considering that the actual weight
center of what is located in the baggage compartment is reestablished every
time you reload the baggage compartment I don't think that one can determine
precisely where the weight center is located down to the exact inch.

I'd go with the 96 inches. Any questions or comments?

OC

PS: While at the airport yesterday I took some pictures of my empty left
baggage compartment -- see attached. Some comments:

0140.JPG: This photo is looking aft at the rear baggage compartment
bulkhead. The top of the seat back is in the forefront and yes, that is the
copilot's headset receptacles located behind the pilot's seat --why? So the
copilot can both see and reach his headset receptacles while strapped into
his seat. Similarly the pilot's headset receptacles are located behind the
copilot's seat. It took me many years of flying many different aircraft with
many different poorly placed headset receptacles to come up with this
preferred location.##

0143.JPG: This photo is looking forward at the aft wing spar at the bottom
of the fuselage interior and the seat back extending upward from the top of
the spar. Notice the items attached to the back of the aft wing spar that
would prevent baggage items from being placed directly against the spar.

##PS: Even when using my new Lightspeed Tango cordless headsets it is
convenient to have the Tango Panel Interface unit plugged in where it is
accessible.

http://www.lightspeedaviation.com/Tango/subgrouping.htm?cat=35717

==========================================

From: pastormac(at)comcast.net
Sent: Wednesday, April 12, 2017 4:47 PM
To: Owen Baker
Subject: Baggage station for W&B

Hi Owen,
The builder of my plane, Richard Kindig had the baggage station at 91 in.
Everything I have seen has it at 96 in. Do you know if they are different on
each individual aircraft or should I go with the 96 in ?
Thanks!
Steve.

To our success, Stephen McIntosh


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pastormac62



Joined: 07 Sep 2015
Posts: 71
Location: Indiana

PostPosted: Sat Apr 15, 2017 10:21 am    Post subject: Baggage station for W&B Reply with quote

Thanks Owen! Where do you live again? I'd enjoy meeting you and have you take a look at my little bird.

To our success, Stephen McIntosh

Quote:
On Apr 15, 2017, at 11:36 AM, Owen Baker <bakerocb(at)cox.net> wrote:

4/15/2017

Hello Steve, Sorry for the slow response -- a few alligators crawled out of the swamp and had to be beat back down.

You wrote: "The builder of my plane, Richard Kindig had the baggage station at 91 in."

It does not appear logical to me that the center of the baggage compartment weight would be located in front of the wing aft spar location.

If your tri cycle landing gear plane was built according to the construction manual the baggage compartment exists from the aft face of the aft wing spar at station 92.8 inches to the aft baggage compartment bulkhead at station 111.0 inches. That is a distance of 18.2 inches.

If you assume that the weight of the items in the baggage compartment are distributed evenly fore and aft then the center of the weight in the baggage compartment is going to be 9.1 inches aft of the aft face of the aft wing spar or at station 101.9 inches.

My records show that I am using a measured 96 inches for my plane as the centroid of the baggage weight location. Considering that the actual weight center of what is located in the baggage compartment is reestablished every time you reload the baggage compartment I don't think that one can determine precisely where the weight center is located down to the exact inch.

I'd go with the 96 inches. Any questions or comments?

OC

PS: While at the airport yesterday I took some pictures of my empty left baggage compartment -- see attached. Some comments:

0140.JPG: This photo is looking aft at the rear baggage compartment bulkhead. The top of the seat back is in the forefront and yes, that is the copilot's headset receptacles located behind the pilot's seat --why? So the copilot can both see and reach his headset receptacles while strapped into his seat. Similarly the pilot's headset receptacles are located behind the copilot's seat. It took me many years of flying many different aircraft with many different poorly placed headset receptacles to come up with this preferred location.##

0143.JPG: This photo is looking forward at the aft wing spar at the bottom of the fuselage interior and the seat back extending upward from the top of the spar. Notice the items attached to the back of the aft wing spar that would prevent baggage items from being placed directly against the spar.

##PS: Even when using my new Lightspeed Tango cordless headsets it is convenient to have the Tango Panel Interface unit plugged in where it is accessible.

http://www.lightspeedaviation.com/Tango/subgrouping.htm?cat=35717

==========================================

From: pastormac(at)comcast.net
Sent: Wednesday, April 12, 2017 4:47 PM
To: Owen Baker
Subject: Baggage station for W&B

Hi Owen,
The builder of my plane, Richard Kindig had the baggage station at 91 in. Everything I have seen has it at 96 in. Do you know if they are different on each individual aircraft or should I go with the 96 in ?
Thanks!
Steve.

To our success, Stephen McIntosh
<000_0140.JPG>
<000_0143.JPG>


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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?KIS-List
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