There are lots of ways to get the fuel to the engine. Your right it's always good to see what others are doing.This is his XL he built some years ago: he ran his lines all down to a 4 point manifold with 4 valves on the wall on the passenger side.It's on his build thread...which is huge....I'll see if I can find it.
Yeah I used high pressure line also. And I liked the idea of being able to isolate all the tanks.My wings are still open (and I am Rivnuting the tank covers).Before I close them I am going to swap the steel lines supplied for hoses.
I'm sure you are right to put valves on all 4 tanks, though the setup that came with the kit has the inner tanks permanently on.
Yep I'm right there with you. I have a lot of testing to do in that regard. I want to make sure she'll gravity feed at all normal flight angles. I have a header tank that is 2 1/2 gallons with a gauge on the panel. I do like know I have at least 20 minutes of full to get down if all else fails.I have an old house in the country with DIY plumbing on a gravity system. I have seen some pretty weird things where pipes went down then up a bit again, and you'd think the water would just go but it doesn't.Long story short, I'm a bit superstitious about this, so I'm wanting to arrange the upper piping so that it never goes back uphill.
There is a flow sensor that im thinking about using. It would alert me with a light on the panel when fuel flow stops from the wing tanks. It would give me a heads up when the outer tank is empty and it's Time to switch to the inner tank. Aircraft extras makes it. Called the AE fuel guardian.Gotcha. I'll also be replacing (and maybe repositioning) the low level indicator with something bright and flashy and solid state (if it's not already).
Hey Mark,Hi KarlOn my blog on the forums here I replaced the fuel sump low level bulb with a 10mm 12V flashing LED...just drilled out the bulb holder and fitted the LED inside...works a treat and no bulbs to fall out as they do fall out of those fittings they supply in the kit. There is a lot of pages in my blog..about 64 or something but you can use the search function on the thread to find anything by name usually.
I am currently working on a method of measuring total fuel onboard by using a pressure sensor that will be mounted at the outlet of the sump. This will be able to measure all fuel and also how much in each tank. if you turn off each tank you will see how much all the ones that are on have in them and you could do this with each tank. There will be some sort of either bar graph or maybe even a Oled display that will be able to tell you how much fuel you have. All of the fuel may not be useable though as you will find out if you are decending and the light comes on...you level out and the light goes out...happed to me a few times when the level in the tanks you hae turned on gets low. The 4 way manifold I made works a treat there are no pipes that go upwards and I have never had a vapour lock in the sump like many others have had using the standard ICP tank system. I also have the fuel return from the engine going back into the end of that 4 way manifold so that also makes it easy and I have a tap on it so I can turn it off if I need/want to.
The only fuel problem I had was a insect got into that 3mm pipe vent under the wing and stopped all fuel from coming out of that tank and I had to land and clear it out then I could use the fuel in that tank. I then changed mine so the breathers were above the caps and it is just 1/4 alu tube bent and threaded and placed into the caps...no more troubles with that now since at all...that is also in my blog. I will try to find the relevent pages and post them here for you tonight when I get home from work
Yep if the word aviation is anywhere near any of this stuff it's automatically triple the price. This does sound like a promising solution though.I am talking to a sensor manufacturer now about the specific type of sensor I want to use. They are not ATEX certified but are fully sealed and laser welded. ATEX is just a rip off anyway. They have it for radios and its just a excuse to triple the price of a radio. The only difference between the std model (in a good radio I am talking about like a Icom commercial grade HH) is that they have a fuse inside the battery... that is the only difference...you pay about $1000 to have the paperwork for it.....sounds like aircraft doesnt it :)The theory behind all of this it should work well I believe with the right sensor. Hopefully today I will get some pricing and a few samples on the way
Magic...congratulations!!!What is the shallow rectangular section under the centre floor of the cockpit reaching forward to the nose leg?