I am think about drilling a 1/2 to 3/4 inch hole through the F705 spar for a wire pass through. The holes (one each side) would be the bottom outboard portion on each side. Any thoughts before I make a mistake ?
705 is the bulkhead behind the seats. I think the problem there -- if I recall correctly -- is there are two doublers in the spar there for the rear wing attach point, isn't there? Might want to call Van's directly on this one.
Gents,
What were the results of this? Did Van's caution against this? Seems to me the F-705B center section bar provides foundation for the two wing angle-of-incidence bolts, but not weight-bearing structure for the wing spars.
I think drilling through the bar would be a horrible idea. They are there for a reason. You could drill a hole above the bar. Don't know what effect it would have structurally, but surely less than drilling through the bar.
There are two 5/8ths holes in the plans that do not go through the F-705B center bar. I don't believe it would be in your best interest to drill through the bar to get a third hole.
Maybe a location above the bar in between the baggage ribs, or above the location where the flap bearing block bolts to f-705?
