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Fuel Sensor

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zsmith3rd(at)earthlink.ne
Guest

Posted: Tue Oct 10, 2006 3:04 am Post subject: Fuel Sensor

Optical/visual/mechanical/whatever.....my first impression is that I would USE the OUTBOARD fuel first.



The only good reason I can come up with at the moment is for structrual considerations.



Sure seems that the location of the mass of the fuel needs to be as near the wing root as possible; therefore 

emptying the outboard tanks leaves those inboard full and closer to centerline of the aircraft.



Maybe some FE will inject a discourse on fuel management.  

Remember.....in the old WWII movies they always dropped the tip tanks.



Regards to all fans of Scotch Brite Pads,



Zed/701/R912/90++%/etc/do not archive

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Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Tue Oct 10, 2006 9:04 am Post subject: Fuel Sensor

Good reasoning.  Imagine a spin with the outboard tanks full and the inboard

tanks empty...Worse imagine a stall with one outboard tank full and

everything else close to empty.



Noel



[quote] --

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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

brothapig(at)HOTMAIL.COM
Guest

Posted: Wed Oct 11, 2006 4:14 am Post subject: Fuel Sensor

I may be wrong here, and it may not apply to small aircraft, but doesn't 

fuel in the outboard part of the wings (i.e. tip tanks) actually decrease 

stress on the wings in turbulence?  This is from keeping weight out of the 

fuselage (wings see less weight)



I don't know how this would affect spins, but wouldn't fuel in the outboard 

wing at least keep the rotation slower?



-Ryan



----Original Message Follows----

From: Zed Smith <zsmith3rd(at)earthlink.net>

Reply-To: zenith-list(at)matronics.com

To: zenith-list(at)matronics.com

Subject: Fuel Sensor

Date: Tue, 10 Oct 2006 06:03:46 -0500 (GMT-05:00)






Optical/visual/mechanical/whatever.....my first impression is that I would 

USE the OUTBOARD fuel first.



The only good reason I can come up with at the moment is for structrual 

considerations.



Sure seems that the location of the mass of the fuel needs to be as near the 

wing root as possible; therefore

emptying the outboard tanks leaves those inboard full and closer to 

centerline of the aircraft.



Maybe some FE will inject a discourse on fuel management.

Remember.....in the old WWII movies they always dropped the tip tanks.



Regards to all fans of Scotch Brite Pads,



Zed/701/R912/90++%/etc/do not archive

- The Matronics Zenith-List Email Forum -

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dredmoody(at)cox.net
Guest

Posted: Wed Oct 11, 2006 8:35 am Post subject: Fuel Sensor

The farther out on the wing any weight (fuel, for instance) is located, the more energy it takes to make it move or change its motion. The important factor is moving mass farther from the center of mass and applies to moving weight farther forward or farther aft of the CG as well. 



Therefore moving weight to a position farther out on the wing should make the plane more sluggish in the roll and yaw axes. Also, any established movement around the CG in those axes (such as a spin) will require more control force to stop and/or reverse it.



As someone else noted, it would be a great idea to burn that outboard fuel first or leave it on the ground for short flights.



Ed Moody II



---- Ryan Vechinski <brothapig(at)HOTMAIL.COM> wrote: 

 	  Quote: 	
		   

 I may be wrong here, and it may not apply to small aircraft, but doesn't 

 fuel in the outboard part of the wings (i.e. tip tanks) actually decrease 

 stress on the wings in turbulence?  This is from keeping weight out of the 

 fuselage (wings see less weight)

 

 I don't know how this would affect spins, but wouldn't fuel in the outboard 

 wing at least keep the rotation slower?

 

 -Ryan

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larry(at)macsmachine.com
Guest

Posted: Wed Oct 11, 2006 8:59 am Post subject: Fuel Sensor

Ryan,

You're correct, in your assumption about tip tanks reducing stresses in 

turbulence, but to a greater degree,

the full tip tanks would reduce rate of change for any maneuver.  It 

might prevent you from getting the correction

needed in a spin or even an awkward landing in the critical moments that 

count.

There would be a period where you have to learn what reactions you have 

when empty averse full.  That could

be too long a time to avoid a seriously compromised event.  I'd be 

reluctant to put tip tanks on a small aircraft

for the same reasons.  That's also why you see them on heavier aircraft 

where tip tanks are a much smaller percentage

of total weight.



Larry McFarland - 601HDS at www.macsmachine.com

do not archive



Ryan Vechinski wrote:



 	  Quote: 	
		   

 <brothapig(at)hotmail.com>



 I may be wrong here, and it may not apply to small aircraft, but 

 doesn't fuel in the outboard part of the wings (i.e. tip tanks) 

 actually decrease stress on the wings in turbulence?  This is from 

 keeping weight out of the fuselage (wings see less weight)



 I don't know how this would affect spins, but wouldn't fuel in the 

 outboard wing at least keep the rotation slower?



 -Ryan

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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:

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Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Wed Oct 11, 2006 7:16 pm Post subject: Fuel Sensor

It probably won't affect the speed of the spin, after all the fuel is in the

tanks at the start of the spin, but the inertia of having that heavy fuel

that far from the CG could be interesting.



Weight any where in the wings is easier on the fuselage and wing attach

points than having fuel in the fuse itself.  The wings after all have to

carry the fuse not the other way around.



Noel



[quote] --

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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:

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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

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