Today's Message Index:
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1. 04:14 PM - Re: glasair III fuel system (Robert Hunter)
2. 07:17 PM - Re: glasair III fuel system (Dick Gossen)
Message 1
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| Subject: | Re: glasair III fuel system |
Thank you both. I am confident that my problem was from a super full
aux tank. I flew again today to confirm that.
It will probably be, I'm sorry to say, my last flight in 957DJ. I'll
be checking out the new owner.
Robert
On Sat, Nov 9, 2013 at 8:46 PM, Robert Buckthal <rbuckthal@gmail.com> wrote:
> At high power settings and high AOA I would get a CO alarm. I spent a lot
> of time sealing the underside of the airplane only to discover that the CO
> was getting in through the rudder opening. Same thing would happen whenever
> fuel vented onto the belly. Level flight was always successful at clearing
> the CO alarm or fuel smell. The plans called for the aux tank vents to be
> on the side to the tank. If the builder did not alter the location of the
> vents inside the tank the top 4 to 6 inches of the tank will not be useable
> due to the curvature of the top of the tank. Any attempt to fill that space
> will likely go out the vent onto the belly or the ground.
>
> Bob
> N223B
>
>
> On Sat, Nov 9, 2013 at 6:59 PM, Dick Gossen <gossend@gmail.com> wrote:
>>
>>
>> OK....I just collaborated with my fellow Glasair friend, Bob Buckthal. I
>> have a Glasair III, Bob has a Glasair IIS. We agree that your problem may be
>> a non-problem. The way your airplane is plumbed, there are three vents going
>> to the vent manifold on the belly. Each main wing tank is vented to that
>> manifold, and the 'header tank' (actually AUX tank) is vented there as well.
>> The purpose of the vents is to allow air to flow into the tank(s) as fuel is
>> consumed by the engine. If any of the three vents gets fuel in it, on the
>> other hand, the fuel will drain down and exit one or both of the belly vent
>> tubes, then run back to the tail, where it will be sucked into the fuselage
>> cavity through the opening where the elevator pushrod exits. You'll smell it
>> immediately.
>> To restate: The belly vent manifold has two exit tubes (in case one gets
>> blocked) and is connected internally by three lines: one from each outer
>> wing, and one from the upper side of the AUX tank near the top. If you fill
>> the AUX "to the brim", it will dump the first 1/2 inch or so of fuel
>> overboard through the belly vent. It will be smelly. Don't smoke!
>>
>> Bob, anything to add?
>> DG
>> N90GG
>>
>> On Nov 9, 2013, at 6:58 PM, Robert Hunter <rolahug@gmail.com> wrote:
>>
>> >
>> > Hello Dick,
>> >
>> > I haven't had the mains full up for years, but didrecently fill to the
>> > brim the header tank just before the cabin smell started happening.
>> > Since my email to the list, my mechanic hooked an air compressor to
>> > the fuselage vent tubes. After blowing out the lines,he weighted the
>> > aft fuselage on the ground, lifting the nose up at a high angle. No
>> > sign of a leaking vent tube. I then flew the aircraft, and smelled
>> > nothing. When I landed, there was no leak at the fuselage vent.
>> > Happy, for sure, but suspicious I haven't really solved the problem.
>> > Any thoughts you have would be greatly appreciated.
>> >
>> > Robert
>> >
>> > On Sat, Nov 9, 2013 at 4:26 PM, Dick Gossen <gossend@gmail.com> wrote:
>> >>
>> >> Robert, does that happen after filling up the tank(s), or on every
>> >> flight, even at 50% or below capacity? I may be able to help in both cases,
>> >> but they are different.
>> >> Dick Gossen
>> >> N90GG
>> >> Flying my beautiful girl since 1990
>> >>
>> >> On Nov 9, 2013, at 3:36 PM, Robert Hunter <rolahug@gmail.com> wrote:
>> >>
>> >>>
>> >>> My ship, #3084, was built in 1989 -1990. Does anyone have a fuel
>> >>> system description/schematic that would guide me? I have a fuel leak
>> >>> from the aft fuselage vent, and the smell of fuel in the cabin.
>> >>>
>> >>> Thanks,
>> >>>
>> >>> Robert
>> >>>
>> >>> N957DJ
>> >>>
>> >>>
>> >>>
>> >>>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >
>> >
>> >
>> >
>>
>>
>>
>> ==========
>> ="_blank">www.aeroelectric.com
>> ooks.com" target="_blank">www.buildersbooks.com
>> et="_blank">www.homebuilthelp.com
>> et="_blank">www.mypilotstore.com
>> "_blank">www.mrrace.com
>> ="_blank">http://www.matronics.com/contribution
>> le, List Admin.
>> ==========
>> " target="_blank">http://www.matronics.com/Navigator?Glasair-List
>> ==========
>> http://forums.matronics.com
>> ==========
>>
>>
>>
>
>
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| Subject: | Re: glasair III fuel system |
Sorry to hear that. Glad we could help.
On Nov 10, 2013, at 6:14 PM, Robert Hunter <rolahug@gmail.com> wrote:
>
> Thank you both. I am confident that my problem was from a super full
> aux tank. I flew again today to confirm that.
>
> It will probably be, I'm sorry to say, my last flight in 957DJ. I'll
> be checking out the new owner.
>
> Robert
>
> On Sat, Nov 9, 2013 at 8:46 PM, Robert Buckthal <rbuckthal@gmail.com> wrote:
>> At high power settings and high AOA I would get a CO alarm. I spent a lot
>> of time sealing the underside of the airplane only to discover that the CO
>> was getting in through the rudder opening. Same thing would happen whenever
>> fuel vented onto the belly. Level flight was always successful at clearing
>> the CO alarm or fuel smell. The plans called for the aux tank vents to be
>> on the side to the tank. If the builder did not alter the location of the
>> vents inside the tank the top 4 to 6 inches of the tank will not be useable
>> due to the curvature of the top of the tank. Any attempt to fill that space
>> will likely go out the vent onto the belly or the ground.
>>
>> Bob
>> N223B
>>
>>
>> On Sat, Nov 9, 2013 at 6:59 PM, Dick Gossen <gossend@gmail.com> wrote:
>>>
>>>
>>> OK....I just collaborated with my fellow Glasair friend, Bob Buckthal. I
>>> have a Glasair III, Bob has a Glasair IIS. We agree that your problem may be
>>> a non-problem. The way your airplane is plumbed, there are three vents going
>>> to the vent manifold on the belly. Each main wing tank is vented to that
>>> manifold, and the 'header tank' (actually AUX tank) is vented there as well.
>>> The purpose of the vents is to allow air to flow into the tank(s) as fuel is
>>> consumed by the engine. If any of the three vents gets fuel in it, on the
>>> other hand, the fuel will drain down and exit one or both of the belly vent
>>> tubes, then run back to the tail, where it will be sucked into the fuselage
>>> cavity through the opening where the elevator pushrod exits. You'll smell it
>>> immediately.
>>> To restate: The belly vent manifold has two exit tubes (in case one gets
>>> blocked) and is connected internally by three lines: one from each outer
>>> wing, and one from the upper side of the AUX tank near the top. If you fill
>>> the AUX "to the brim", it will dump the first 1/2 inch or so of fuel
>>> overboard through the belly vent. It will be smelly. Don't smoke!
>>>
>>> Bob, anything to add?
>>> DG
>>> N90GG
>>>
>>> On Nov 9, 2013, at 6:58 PM, Robert Hunter <rolahug@gmail.com> wrote:
>>>
>>>>
>>>> Hello Dick,
>>>>
>>>> I haven't had the mains full up for years, but didrecently fill to the
>>>> brim the header tank just before the cabin smell started happening.
>>>> Since my email to the list, my mechanic hooked an air compressor to
>>>> the fuselage vent tubes. After blowing out the lines,he weighted the
>>>> aft fuselage on the ground, lifting the nose up at a high angle. No
>>>> sign of a leaking vent tube. I then flew the aircraft, and smelled
>>>> nothing. When I landed, there was no leak at the fuselage vent.
>>>> Happy, for sure, but suspicious I haven't really solved the problem.
>>>> Any thoughts you have would be greatly appreciated.
>>>>
>>>> Robert
>>>>
>>>> On Sat, Nov 9, 2013 at 4:26 PM, Dick Gossen <gossend@gmail.com> wrote:
>>>>>
>>>>> Robert, does that happen after filling up the tank(s), or on every
>>>>> flight, even at 50% or below capacity? I may be able to help in both cases,
>>>>> but they are different.
>>>>> Dick Gossen
>>>>> N90GG
>>>>> Flying my beautiful girl since 1990
>>>>>
>>>>> On Nov 9, 2013, at 3:36 PM, Robert Hunter <rolahug@gmail.com> wrote:
>>>>>
>>>>>>
>>>>>> My ship, #3084, was built in 1989 -1990. Does anyone have a fuel
>>>>>> system description/schematic that would guide me? I have a fuel leak
>>>>>> from the aft fuselage vent, and the smell of fuel in the cabin.
>>>>>>
>>>>>> Thanks,
>>>>>>
>>>>>> Robert
>>>>>>
>>>>>> N957DJ
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> ==========
>>> ="_blank">www.aeroelectric.com
>>> ooks.com" target="_blank">www.buildersbooks.com
>>> et="_blank">www.homebuilthelp.com
>>> et="_blank">www.mypilotstore.com
>>> "_blank">www.mrrace.com
>>> ="_blank">http://www.matronics.com/contribution
>>> le, List Admin.
>>> ==========
>>> " target="_blank">http://www.matronics.com/Navigator?Glasair-List
>>> ==========
>>> http://forums.matronics.com
>>> ==========
>>>
>>>
>>>
>>
>>
>>
>
>
>
>
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