Inspection hole for tank tube

[Bearhawk Builder]

Laying out the inspection rings, have the factory location drawing. Would it make sense to add another hole next to the inboard forward one to get at the tank tube for future removal? With the one hole you could get to it but I don't know how you'd get both hands in there to get at the bolt / nut holding the cross tube at the front spar. Is there enough room to get a hand in there from the top when the tank is installed?

 

[Gordon Misch]

Put a ring wherever you think you might want it. No need to cut it out right away

 

[Bearhawk Builder]

True, just don't want to put one there if it's not a problem.
Thanks

 

[cubpilot2]

No ring needed.
Always Accessed from the top.
Needle nose vice grips are handy for this.
Align the holes with bent awl. Clamp ears of tube with grips and bolt goes in easily.

 

[Steve Pierce]

Same here, just R&R two 24 gallon Dakota tanks out of a Super Cub on amphibs and got to everything from the top. I made a small bullet, get it in there and the the bolt.

 

[mike mcs repair]

He’s talking about the OUTBOARD end of the tube at front spar... yes I add a rectangle grommet to the bottom of wing there for future use if needed.


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[Steve Pierce]

I have removed a lot of tanks and never removed the outboard bolt, just the inboard and lifted it up and aft.

 

[bob turner]

That's what we did in June, with advice from you guys. Worked great. Two man job getting those straps back on the tank.

 

[mike mcs repair]

I have removed a lot of tanks and never removed the outboard bolt, just the inboard and lifted it up and aft.

There was a reason on the wildcat cub that this was needed. Think rib was to close together to get it out without undoing both ends. Oh and we had a vent line outboard to hook up also.


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