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Usable Fuel

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astills(at)cox.net
Guest

Posted: Mon Jun 26, 2006 6:33 am Post subject: Usable Fuel

For those of you already flying I have a question. I always thought there

were 2 gals of fuel unusable in the bottom of the tanks. In filling and

draining the tanks I still have to fill with 18 gals. Does the reserve side

"empty" the bottom of both

sides of the tank?

Al Stills

N625AZ

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DuaneFamly(at)aol.com
Guest

Posted: Mon Jun 26, 2006 6:48 am Post subject: Usable Fuel

Good Morning Al,

  

 I'm not flying yet....still in the build phase......but when I hooked up my  fuel plumbing....I did notice that you could drain the entire tank but you would  have to first drain one side then the other. The hump in the muddle of the fuel  tank gives you the separation from main and reserve side. You should have about  2 gal. in the reserve side, but that can be effected by flying in turbulence due  to the sloshing moving some fuel back over to the main side after you switch. So  if you ever got into a position where you switched to your reserve and then used  all of it, you might find a little more fuel by switching back to the main  side.

 So, unlike a motorcycle that places a reserve pickup at a lower level in  the tank, the Europa has a tank like a saddle bag with a takeoff at the bottom  of both sides.

  

 I hope this helps.   

 Mike Duane  A207A

Redding, California

XS Conventional Gear

Jabiru 3300  

Sensenich R64Z N

Ground Adjustable  Prop

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flyinggpa(at)comcast.net
Guest

Posted: Mon Jun 26, 2006 7:00 am Post subject: Usable Fuel

Al

  

 I made the same test you are doing. I think I remember that there was less  that 1/2 remaining in each side.  I figure 18 US gal. of usable fuel.  When I plumed my fuel system, I switched the reserve to the port side and  figure it for 2.5 gal.  

 

Cliff Shaw

1041 Euclid ave.

Edmonds, WA 98020

425 776  5555

http://www.europaowners.org/WileE

  

  

 [quote]   ---

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astills(at)cox.net
Guest

Posted: Mon Jun 26, 2006 7:29 am Post subject: Usable Fuel

 

  	  Quote: 	
		     Thanks for all the answers. Cliff I also    found about 2 1/2 gals in reserve when pumping it out. For some reason I    thought there were 2 gal's unsuable but I guess not. Fuel level bears watching    closely. Don't want to run out thinking there is more there.  So I guess    we have 18 gal's usuable but would not want to run that    low.

   A l    Stills

   N625AZ

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topglock(at)cox.net
Guest

Posted: Mon Jun 26, 2006 7:40 am Post subject: Usable Fuel

Very simillar to my tests.  When filling the tank for the first time, I carefully leveled the A/C and measured the amount of fuel it took to fill the reserve side.  It came to 2.6 US gal.  I actually watched the fuel cross the "hump" and stopped adding fuel when it did.  To answer the question, assuming the proper plumbing of the fuel selector valve, one can only drain one side of the tank (approx 15.5 US gal.), then switch to the other side to drain the remaining gas.

 

 Jeff - Baby Blue

 193 hours

 

 Cliff Shaw wrote:  	  Quote: 	
		              Al

    

   I made the same test you are doing. I think I remember that there was less that 1/2 remaining in each side.  I figure 18 US gal. of usable fuel. When I plumed my fuel system, I switched the reserve to the port side and figure it for 2.5 gal.  

   

 Cliff Shaw

 1041 Euclid ave.

 Edmonds, WA 98020

 425 776 5555

   http://www.europaowners.org/WileE

    

    

    	  Quote: 	
		       ----- Original Message ----- 

     From:     astills (astills(at)cox.net)     

     To:     Europa-List(at)Matronics. Com ([email]Europa-List(at)Matronics.%20Com[/email])     

     Sent: Monday, June 26, 2006 7:25 AM

     Subject: Usable Fuel

     

     

 --> Europa-List message posted by: "astills" <astills(at)cox.net (astills(at)cox.net)>

     

 For those of you already flying I have a question. I always thought there

 were 2 gals of fuel unusable in the bottom of the tanks. In filling and

 draining the tanks I still have to fill with 18 gals. Does the reserve side

 "empty" the bottom of both

 sides of the tank?

 Al =================================================http://www.matron================================================

 bsp;  Email List ;                                    ==================================================nbsp;      generous bsp;                    href="http://www.matronics.com/contribution">http://www.matronics.com/c==========================================

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topglock(at)cox.net
Guest

Posted: Mon Jun 26, 2006 7:41 am Post subject: Usable Fuel

Al, that's correct.  18 gal. usable, with 2.5 of that as a reserve.  I've never taken on over 14.5 gals, when landing for fuel...

 

 Jeff - baby Blue

 193 hours

 

 astills wrote:

  	  Quote: 	
		               

    	  Quote: 	
		       Thanks for all the answers. Cliff I also found about 2 1/2 gals in reserve when pumping it out. For some reason I thought there were 2 gal's unsuable but I guess not. Fuel level bears watching closely. Don't want to run out thinking there is more there.  So I guess we have 18 gal's usuable but would not want to run that low.

     A l Stills

     N625AZ

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RoddyEuropa(at)aol.com
Guest

Posted: Mon Jun 26, 2006 9:29 pm Post subject: Usable Fuel

Something to be aware of is that you could get fuel starvation when you  change attitute from level to climb if there is not much fuel in whatever side  of the tank you are drawing fuel from. This is because the tank is square shaped  at the bottom, and the fuel outlet is at the front. 

  

 So take the following scenario: you are landing with an almost empty main  'tank', but a couple of gallons in the reserve. All is fine because your  approach attitude is level or slightly nose down. Then you have to go around -  nose up, the fuel goes to the back of the tank, and the engine gets  starved of fuel just when you needed it most! 

  

 Because of this, if I'm close to having to change to reserve when getting  close to landing, I change to the reserve tank a few minutes before  landing.

  

 Roddy Kesterton

 #220

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thomas(at)scherer.com
Guest

Posted: Tue Jun 27, 2006 12:36 am Post subject: Usable Fuel

On my extended flight I have sometimes lost track of how many tanks I had pumped into the main tank and in order to re-sync I ran the tank empty (something which keeps you awake over the Oceans). I was surprised with the time it takes from the filter running dry to the engine acutally quitting. 

  

Also, when the engine quits and you switch to aux tank it is a matter of seconds til you have full power again. 

  

Please keep your technique - it makes a lot of sense - but for all out there - don't worry too much, even when the outlet goes dry due to change in attitude - I reccon you can fly a full circuit on what is left in the fuel line. 

  

Great Airplane she is, the Europa ! 

  

<Thomas, N81EU> 

  [quote]---

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