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Old 03-30-2018, 10:37 AM   #21
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Take the cover off and look at the actual valves and hoses.

Is there another set of valves just like this somewhere else in the boat?

My guess is that these are simple on / off valves that control the hoses connected to the Starboard tank. When the arrow is pointed at the word “Port”, the hoses to the Starboard tank are closed and the engine is running on the port tank. If I’m right, there has to be another set of valves to control the port tank.

Possum came with four valves just like this. I could draw / return to both tanks at the same time. I could draw / return to either tank. Or I could draw from one tank and return to the other.
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Old 03-30-2018, 11:02 AM   #22
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Reading all this; I'm reminded of the John Denver fuel valve fatality.
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Old 03-30-2018, 11:39 AM   #23
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Reading all this; I'm reminded of the John Denver fuel valve fatality.
Having seen his actual aircraft after the accident and studying it at Monterrey Naval Post Graduate Safety training, what exactly is the point concerning his error as I know the probable answer?
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Old 03-30-2018, 11:41 AM   #24
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Having seen his actual aircraft after the accident and studying it at Monterrey Naval Post Graduate Safety training, what exactly is the point concerning his error as I know the probable answer?
Poor human factors in the fuel management design. But, as you well know, there is usually not just one cause for these things.
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Old 03-30-2018, 11:44 AM   #25
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yep, poor design and......

...zero familiarity with his new aircraft, lack of training, and an out of sight valve were the reasons the Navy experts summed up.


Hardly an issue for a reasonably intelligent boater hopefully.....
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Old 03-30-2018, 11:54 AM   #26
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yep, sad. Never flown a rutan design, but these are "stall resistant". Was there research on why an engine out would head it at high descent speed? Back when I had to worry with this, all the fuel valves were in front of me and well marked;
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Old 03-30-2018, 11:54 AM   #27
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Only because the only ones I have seen are 180 degree sweeps...
Are there 3-way valves that function within a 90 degree throw?
The seachoice valve photo is a typical L ball drilling with 360 handle so 4 possible configurations. Left, right, none, or both. T drillings are also available as are 180's.

https://www.directmaterial.com/knowl...ll-valve-work/
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Old 03-30-2018, 12:12 PM   #28
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So, this is a shot i took from a GB42 last week. Twins plus gen and i submit even without a lot of marking its pretty clear. Of course u can add a placard or two on the hazards of pick up and return on different tanks.



Click image for larger version

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But no, I can't explain the 45 deg handle. Not my boat...
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Old 03-30-2018, 12:32 PM   #29
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yep, sad. Never flown a rutan design, but these are "stall resistant". Was there research on why an engine out would head it at high descent speed? Back when I had to worry with this, all the fuel valves were in front of me and well marked;
his fuel valve if I remember was behind his head on the left.....thus the inadvertent engine shut down because he couldnt see it and not enough experience with that particular aircraft.....

because I wasnt involved in the actual investigation ..nor did I read it....and it is third hand info from an accident investigation class...my pass alongs are just that.....not fact...
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Old 03-31-2018, 05:55 AM   #30
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The valve folks sell dual valves that switch the supply and return at the same time.

No confusion .

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Old 03-31-2018, 06:20 AM   #31
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The Seachoice diagram is correct and the valves I am familiar with on the assistance towboats have been that way for 20 plus years. For 3 port valves by Seachoice and possibly someone else ad I am not sure what valves we used.

They are confusing and while the arrow head does indicate something, it does not indicate correctly if you plumb tanks right and left and engine out the bottom.

Confused me until I shutdown the engine one day and re-sharpied the mounting plate labels. Catches many a new captain.
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