Hello All:

       When I am attempting to fly my profile stunt/combat airplane, the engine cuts out when I try to do any form of an outside manuveur. 

        The plane has a Fox .35 Stunt and a wedge shaped uniflow tank mounted with the wedge on the centre line of the engine. I replaced the previous tank for the same reason. it would cut out if any outside moves were attempted.  It too was a wedge shaped uniflow tank also located with the widest part of he wedge on the C/L of the engine.

       I seem to remember tht the Fox, as well of some other engines need to be mounted with the
 centre line of the tank located either above or below the C/L of the engine to get equal engines runs upright or inverted.

      I am guessing thet the Fox needs the tank to be mounted about 3/16" above the C/L when the plane is flying upright.  For some esoteric reason. the engine will now run well in both attitudes.  Am I correct about mounting the tank above the C/l or do I have this backwards?

      Which way shouuld I move the tank?

                                                                                                               Tia,

                                                                                                               Frank

     I was informed that the tank had not been made correctly and that I should tear it apart and check the plumbing. AAAAAAAAAAAAAAAAAAAAGGGGGGGGGGGGGGGGGGGGGGGG



 

      Hi Brett:

      Thanks for he tip!

      I spent hours researching the Fox .35 Stunt fuel feed problems and the concensus is that one must block off part of the intake bypass that is cast into he block.  This is the only Fox .35 Stunt that have flown that did act in this manner!  Perhaps it is time to try another Fox.  I have used a Fox .25 with the three bolt backplate on this plane with great success.  I was getting more "break in time on this Fox .35 Stunt as it is a dream to start! First flip starts almost everytime!

     Before I do anything drastic, I am going to change the plug and check the hole in the spray bar, Enya,. I do not think that is tank related as I did an A-B test with another tank and got the same results.

     Perhaps it is time to stop using old Fox engines and get with the more modern ones!!!  Lol

                                                       Stay well my friend.

                                                       Frank

   You almost can't put it far enough off to quit, and still have the tank on the fuse, unless you did something strange. It will keep running with it WAY further off that you can likely get it.

   Once you get the bypass stuffed properly, it's very close to what you suggest. Most of the radical offsets are to try to fix the gas flow issue, which it doesn't.

    Brett

Oh, well nevermind then.   

Hold onto that Fox 35.  When you put it in a built up fuselage model (like a Gieseke Nobler) instead of a profile, you will find it has no run hiccups and it will feel like it has 3 times the horsepower it had in the profile mounting.  Then you will see what a true 4-2-4 stunt run is really like!