Does anyone know if there is a way to set up a two tank system , on opposite sides on the fuselage, where fuel with draw from both at the same time, rather than one then the other. I have a prop jet Mig 29 looks like an f-14, the tank is desinged to go right behind fire wall, about 20 inches in front of the center of gravity. NOT GOOD. So there is plenty of room on the CG inside of the fake ducts but I cannot flywith one tank empty and the other full. Thank you so much.

Ryan

My first try would be to have your 2 main tanks feeding a header tank near the engine. You might be able to use muffler pressure to provide adequate flow to the header tank from the main tanks. One of my concerns would be venting excess pressure from the header tank without leaking fuel all over the place. Maye some sort of check valve would work. You could always use a pump with a fuel level sensor in the header, but that would of course add even more weight an complexity. Good luck!!

Don

I haven't tried it but I was JUST reading about jets out of curiosity. Appently they do this kind of stuff all the time. Take a look at this site:

http://www.crcja.org/faq/fuel.htm

These fuel systems were designed to work with ducted fan and turbines. I would imagine that the muffler back-pressure of a ducted fan engine would be similar to that of a conventional glow engine.

I don't know enough about it to say if it would work for what you want to do, but I thought I'd pass on the information anyway. Hope it helps.

Juice

If it hadn't been for my two tank system, I'd be stranded on the side of the road right now. I just got in from a 1500 mile trip. Somewhere about 400 miles ago I ran out of veggie in my second tank. But... I couldn't get any fuel pressure on the diesel side. I figured the stock fuel pump had croaked (I've replaced a few already) so I put some diesel in the WVO tank, re-routed my coolant lines to keep the heat out of the veggie system and drove home. Having a second fuel system on board was nice! Once I got home, I dropped the in-line fuel level sensor just prior to the stock fuel pump. I had ditched the in-tank sock type strainer months ago for an in-line T-strainer just prior to the fuel pump. That strainer (1" dia x 7" long) was completely stopped up with some sort of material that looked like mulched up foam from a cushion. Someone either vandalized my truck or the fuel pump at the truck stop I used last week.In any case, I was glad I had the second fuel system AND that I had added a fuel strainer in lieu of the in-tank screen. Otherwise, I'd be dropping the tank tonight.

It's as simple as plumbing both tanks to a common tee. The trick is to keep the lines from the tank to the tee equal length so the flow resistance is equal. On my F-22 the tanks are on opposite sides of the fuselage. I plumb the two tanks to a tee and then to a header tank which removes any air from the fuel and then on to the fuel pump. I fill the tanks with a single line which goes to a header tank and back flows the fuel into the main tanks through the clunk. Both mains vent with equal length lines to a tee and then to an overboard vent.

Ryan,

Read this thread:

http://www.rcuniverse.com/forum/m_97...tm.htm#9784820

And keep in mind that in vertical flight, up or down, the pressure at the iddle bar accounts for the height of the column of fuel between the carburetor and the farest tank.

Sullivan sells the tanks for glow ducted fan.
Edwin
http://www.sullivanproducts.com/Fuel...nMainFrame.htm

If nobody else noticed, this thread is over 8 years old.

And I think one guy is talking about a truck.