Fuel Feed failure for a single engine Cessna

[iflyforpie]

I guess you do have a place here with your constant disagreements, photofly.

185, then...... .....though I suppose that some pressure equalization may be possible even though a good portion of the EDP fuel flow is being pumped back into the tanks via the return lines at cruise.

[DougRonan]

As far as I know all single engine Cessna that have a "both" setting have a vent tube connecting the tanks along the front carry through - including the 185??

[GyvAir]

Not looking to pile on, IFFP, but I think the cross vent is pretty much universal in the high wing Cessnas.

[ahramin]

Alright, I went and dug it out

CAR Standard 523.975 (4)

Airspaces of tanks with inter-connected outlets must be inter-connected;

[iflyforpie]

Alright, I went and dug it out

CAR Standard 523.975 (4)

Airspaces of tanks with inter-connected outlets must be inter-connected;

I just found it too.

Ill placard the Cub fuel system one tank on at a time.

I just never really thought of return lines pushing back about the same amount of fuel as the engine is consuming back into the tanks as 'vents'.

[DougRonan]

Alright, I went and dug it out

CAR Standard 523.975 (4)

Airspaces of tanks with inter-connected outlets must be inter-connected;

I just found it too.

Ill placard the Cub fuel system one tank on at a time.

I just never really thought of return lines pushing back about the same amount of fuel as the engine is consuming back into the tanks as 'vents'.

You should look seriously at setting your cub up with a fuel system with a "both" - the reason for "both" is to give you fuel in any attitude and if you have a problem with feeding from on side is automticlay feeding form the other side - you should set it up with two outlets as well - front and rear - with a "both" fuel selector, front and rear outlets, and a vent line joining the two - you will have fuel in any attitude!! What kind of Cub are you building??

[iflyforpie]

I think I'm going to call it a Super Special, since it is about half way between a Super Cub and a PA-11 (Cub Special). PA-18 fuse, Wag Aero (J3) wings, and an O-235. I got it from Cat Driver.

I'm limited with the wing tanks as to what I can do with them. Three fittings.... one for fuel pickup, and two for the top and bottom of the sight glasses.

Not to worried about unusual attitudes, since there is a ~5 gallon header tank like the Super Cub has under the dash.

[Cat Driver]

When he gets it finished it will be better than a PA11, which was the best Cub.

Then he can do airplane handling skills training with it....

......which was the reason I had in mind for it.