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  #46  
Old 07-10-2007, 08:41 PM
Lynn Erickson Lynn Erickson is offline
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Default Re: how not to modify your Aero canard

Quote:
Originally Posted by John Slade View Post
Let's hear it from those who've accidentally run a tank dry because they were distracted by other things. I'll start the count. Mine was in a PA28. Flip to other tank (at 800'). Fly home. It's a bit like the old "those who have and those who will" thing.
Now let's hear it for redundancy. I'll start.
I get 5 points for this one. once in a piper as a passenger, once in a long eze as a passenger, twice in my plane, once on purpose and once not , once in my plane when the fuel cap was on but not fastened properly .the cap came off but was held on by the cable and the tank was sucked dry before I could get it back on the ground. thanks to the stock fuel valve I just switched to the other tank.
Why would anyone change it?
what is better about the single sump system?
every reason I have heard is not better just different or is that dangerous

I have heard storys of running a tank dry manys times by many canard pilots. but only the ones with single sumps systems have an accident report to go with their story.
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  #47  
Old 07-10-2007, 08:53 PM
Wayne Hicks Wayne Hicks is offline
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Default Re: how not to modify your Aero canard

Cessnas use on-off valves because they are high winged. Cessna 172 fuel tanks are vented with a single vent line. Fuel will be consumed from the tank with the vent line until the cross-over vent tube to the other tanks is uncovered. Then both tanks will be consumed at nearly equal rate. But the one tank with the vent will be a few gallons lower than the one with the crossover tube.
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  #48  
Old 07-10-2007, 09:25 PM
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Default Re: how not to modify your Aero canard

I run mine dry as a normal operation.

Waiter
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  #49  
Old 07-10-2007, 09:39 PM
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Default Re: how not to modify your Aero canard

Quote:
Originally Posted by John Slade View Post
Let's hear it from those who've accidentally run a tank dry because they were distracted by other things. I'll start the count. Mine was in a PA28. Flip to other tank (at 800'). Fly home. It's a bit like the old "those who have and those who will" thing.
Now let's hear it for redundancy. I'll start.
Not "accidental", but on a long XC against unforecast headwinds in a 172 with small tanks.

Planned time expired, call FSS to notify and extend and position report. Switch tanks from Both to LEFT and note time. Around 20 minutes later some stumbling about 3 minutes to the airport. Switch to RIGHT and back to normal. Now, I know there is enough fuel for an uneventful landing either at the airport, or choose where I'm going to land under power NOW. Roads or beach.

Feeding from both on low tanks doesn't give you that Warning time to make your own decision. - Separate tanks give another warning that one of your options has expired and the other will in a definite timeframe!
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  #50  
Old 07-10-2007, 11:12 PM
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Clutch Cargo Clutch Cargo is offline
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Default Re: how not to modify your Aero canard

Well, so much about 310 Cessnas not crashing.
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  #51  
Old 08-03-2007, 10:38 AM
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bferrell bferrell is offline
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Default Re: how not to modify your Aero canard

Does anybody know how his plane cooled prior to this? I'm wondering because it looks like his cowling sports exhaust aumentation headers very similar to the ones I've built into my Veloicity.

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  #52  
Old 08-03-2007, 01:12 PM
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Default Re: how not to modify your Aero canard

Quote:
I run mine dry as a normal operation.
Waiter, I always wondered if the canards fly a bit more difficult with all that weight on one side?
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  #53  
Old 08-03-2007, 01:23 PM
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Default Re: how not to modify your Aero canard

Quote:
Waiter, I always wondered if the canards fly a bit more difficult with all that weight on one side?
Switch tanks often i.e. 1/2 to 1 hour depending on fuel burn. Minor roll trim takes care of the heavy side.

no big deal.

Waiter
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  #54  
Old 08-03-2007, 01:45 PM
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Default Re: how not to modify your Aero canard

I'm kind of curious as to what effect running the tank dry has on the fuel pump? I know that if I were to run the tank dry in my truck it damages the electric fuel pump. Reason being, it depends on the fuel to help cool the pump.
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  #55  
Old 08-03-2007, 02:23 PM
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Default Re: how not to modify your Aero canard

Quote:
Reason being, it depends on the fuel to help cool the pump.
The engine mechanical pump is a diaphragm, no harm.

My original boost pump was an electrical "Facet" it was also a diaphragm, no problem. (low pressure, carburetor)

My New mechanical pump is also a diaphragm, but the electric boost pump is either a geared or a vane. (High pressure, 30 psi, fuel injection).

I don't think running them dry for 15 seconds hurts anything!

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