Author Topic: Fox tank which end is front? (Read 1128 times)

dave siegler · « **on:** September 22, 2016, 02:58:27 PM »

I am assuming the feed and over flow face forward and the feed line needs to do a loop around?

John Craig · « **Reply #1 on:** September 23, 2016, 03:45:42 AM »

I have never seen this configuration in a Fox tank. I have only seen tanks with the pickup (middle tube) facing forward & a classic vent & overflow out the top & bottom of the tank on the forward portion of the tank. Has this tank been customized?

If I really wanted to use it: I would take it apart so that I could customize it with all tubes forward & uniflow.

Chris McMillin · « **Reply #2 on:** September 23, 2016, 09:09:09 AM »

Yes Dave,
Try it that way and see if it works for you. I remember having one that worked on a Magician with a Fox 35.
Chris...

john e. holliday · « **Reply #3 on:** September 23, 2016, 10:00:15 AM »

Would like to see the inside of it.

Motorman · « **Reply #4 on:** September 23, 2016, 11:05:40 AM »

Block one of the vents and fill it half with fuel then flop it around to see when it comes out the feed tube.

richardhfcl · « **Reply #5 on:** September 23, 2016, 12:56:53 PM »

Guys,

With my fading memory I remember these tanks as being the Fox "combat" tanks. The two vents
were towards the back of the aircraft with the single fuel pickup towards the front. If I recall, these
tanks didn't work all that well for anyone in the Chicago area.

Air Ministry . · « **Reply #6 on:** September 23, 2016, 01:11:52 PM »

Like he says , a bit of fuel ( or water , meths , etc . Scotch is probly safer , AS . . . ) put a piece of tube ( a few foot ) on it ,
Bowing Gently and tilting it about , should get to the core of the matter , or end of the tubes .

Blowing or Sucking ?

Blowing youll get bubly noises while the pipe your ons submerged . Dont get it in the eye .

Sucking with say 10 ml in it , youd find the pipe ends when theyre under it / submerged .

Do a sketch as you go , the fumes can induce false arithmatic .

Randy Cuberly · « **Reply #7 on:** September 23, 2016, 01:44:01 PM »

Richard (above) is right. This tank was made by Fox for Slow Combat and the end with the two vents sticking out is the front (faces toward the engine). The funny looking curved vent is the engine feed line. It was curved and facing to the rear supposedly to simply make the line more accessible for pinching during the starting procedure...go figure. These tanks worked very well for me with Fox MKIII's and MKIV's way back when! They were designed to allow a somewhat leaner run for speed and still feed better than a conventional tank setup. Chicken hoppers worked a little better but these tanks worked very well! They are baffled on the inside if memory serves me, to provide a semi- Hopper effect. I've had a bunch of them apart and probably still have some bent up ones around here somewhere!

Randy Cuberly

dave siegler · « **Reply #8 on:** September 23, 2016, 02:17:48 PM »

I stuck a wire down each line and I think I understand the plumbing.

It looks like Randy is right.

The feed line curls around and heads to the back. So the fuel line will have a loop in it.

In the front the overflow and the fill line go in the front turn 90 deg and go to the top and bottom of the tank.
so the fill and overflow face forward.

This is going on an old slow combat plane I was given that has a 36x on it.
The old tank had a leak and stared a fire when the fox backfired.

We use old combat planes for crowd demos. They love the noise and speed of a combat place.

The stunt pattern is not exciting do do over and over in demos flights.

I just got a real nice MK5 that may end up on it.

Randy Cuberly · « **Reply #9 on:** September 23, 2016, 05:10:07 PM »

Quote from: dave siegler on September 23, 2016, 02:17:48 PM

I stuck a wire down each line and I think I understand the plumbing.

It looks like Randy is right.

The feed line curls around and heads to the back. So the fuel line will have a loop in it.

In the front the overflow and the fill line go in the front turn 90 deg and go to the top and bottom of the tank.
so the fill and overflow face forward.

This is going on an old slow combat plane I was given that has a 36x on it.
The old tank had a leak and stared a fire when the fox backfired.

We use old combat planes for crowd demos. They love the noise and speed of a combat place.

The stunt pattern is not exciting do do over and over in demos flights.

I just got a real nice MK5 that may end up on it.

If the 36X is in good condition it'll likely be better than the MKV! MKV was a real loser in my opinion! I have several 36X's that will eat them alive!

Randy Cuberly

Rich Perry · « **Reply #10 on:** September 24, 2016, 10:43:14 AM »

I liked my Mk. 5 but keep in mind, it was a sport engine, not a combat engine. It did not have the front bearing, only a rear, so it was a completely different case than the MK 6 special. It comes down to what you want to do.