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larger fuel tanks


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Well, after my foray into cross country flying and going through way more fuel than planned (still had 1 hr of fuel on board (well ok, 50 minutes)) I'm thinking of making the strakes wetter, anyone done this?

 

Smaller/no storage back or front and extending wet portion further into strake.

maker wood dust and shavings - foam and fiberglass dust and one day a cozy will pop out, enjoying the build

 

i can be reached at

 

http://www.canardcommunity.com/

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Inboard increase puts the extra fuel closer to the c of g, so it should have less impact. Increasing outboard would put weight well behind the c of g. Thats why we close off a (usable) portion of the outboard end. 16 - 20 gals of extra fuel = approx 100lbs. You might find that full tanks is unuseable with rear pax because of aft c of g limitations.

I can be reached on the "other" forum http://canardaviationforum.dmt.net

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I will NEVER fly out of CG.

Nor would anyone with any common sense. Not deliberately, anyway. Accidentally is the danger. Just be sure to consider and measure for EVERY eventuality of fuel content, flight attitude and loading when calculating weight and balance. e.g. it might be fine straight & level. When you go into a 20 degree climb, the c of G might go too far aft.

I can be reached on the "other" forum http://canardaviationforum.dmt.net

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  • 2 months later...

OK so you can't change the rear cg, but how about the forward cg? Change the airfoil from the wing to the fuselodge?? Move the forward of the foil forward, I am going to burn allot of fuel with full power to 15 or so thousand feet

maker wood dust and shavings - foam and fiberglass dust and one day a cozy will pop out, enjoying the build

 

i can be reached at

 

http://www.canardcommunity.com/

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OK, i just did some rough math, all are estimates, except the number of tanks.

 

2 tanks

5" wider

25" long

6" deep

____

1500 cubic inches/231 cubic inch per gallon = 6 gallons

 

I get six gallons if i add an inboard bulkhead 5 inches in! Did I miss something or john, do you have a diferent size gallon?

maker wood dust and shavings - foam and fiberglass dust and one day a cozy will pop out, enjoying the build

 

i can be reached at

 

http://www.canardcommunity.com/

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Dunno, Mike. I did my calculations a different way. I just counted how many times I had to go to the gas station to fill my 5 gallon container. It took 6. There wasnt any gasoline on the floor when I was done. (there was later, but that's a whole other story).

I can be reached on the "other" forum http://canardaviationforum.dmt.net

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OK, so that makes sense, the plans state that the tanks hold 30 gallons, you moved the inboard liner 2" and got 30 gallons, so if I add 3 more inches than you, i might get 3 gallons total.

maker wood dust and shavings - foam and fiberglass dust and one day a cozy will pop out, enjoying the build

 

i can be reached at

 

http://www.canardcommunity.com/

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my memory says 52 gallons total capicity, I don't know where that memory item came from?? I checked nat's site, couldn't find a fuel capacity stat, found one source, marc's site on performance graphs, his go to 52 gals.

 

So, there

maker wood dust and shavings - foam and fiberglass dust and one day a cozy will pop out, enjoying the build

 

i can be reached at

 

http://www.canardcommunity.com/

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  • 1 year later...

1,000 lbs of gas. Makes my 25 gallon rear seat tank look like a thermos bottle. ;)

 

I have a "T" in my fuel line just before it goes thru the firewall to the engine. This "T" is normally capped.

 

When I install the tank, There is a small electric valve mounted on the tank. and I have a hose that connects to the "T". (Theres a "T" in the vent line also that connects to the auxs tank vent)

 

I take off and burn on the left tank for 1/2 hour. I then switch and burn on the right tank for 1/2 hour.

 

I then switch the main fuel OFF and energize the aux tank solenoid valve. I burn the aux tank until exhaustion. I turn off the solenoid valve and switch back to the left or right tank.

 

When I have all the tanks filled, and am loaded up with baggage, I weigh in at about 1750 lbs. Even with my constants speed prop, I still take almost 4000 ft of runway to get this mass up to speed. :scared:

 

I'll be very intrerested in knowing how much runway it takes to get off the ground!

 

When I finish my current round of modification, I plane on making a larger seat tank, If I can get 50 gallons into it, I'll be very happy.

 

Waiter

F16 performance on a Piper Cub budget

LongEZ, 160hp, MT CS Prop, Downdraft cooling, Full retract

visit: www.iflyez.com

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Just a few more pictures of my tank. I plan on using Moses Lake in Washington for preformance testing. With more than 13000 ft I should be in good shape. I will post some numbers when I have them.

Ken

post-368-14109015288_thumb.jpg

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post-368-141090152892_thumb.jpg

post-368-141090152898_thumb.jpg

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