Project: pbruce     -     Entry

May 14, 2020 10 Flap pulleys Category: Fuselage
Building a double pulley guard which also has an anti-rotation leg on it proved very elusive. There are about 8 bends required to fashion this little guy so that it will function properly and still mount to the both axel and frame. It seems unbelievable but I made 16 attempts and each time something prevented proper anchoring, smooth rotation, or sufficient strength. Way too many hours wasted on something which could easily have been provided for just a few dollars, like the wing pulley guards were, in my opinion.

Many homebuilder guides and other planes specify a cable guard without an anti rotation leg (seems like poor practice) or with the ends of the guard which are opposite the cable bent up along one of the edges of the hex nuts, using the edge of the bolt or nut as a straight edge to prevent rotation. (Glastar for example) I ended up going with the latter technique for the last pulley-the one in the centre before the “Y” which splits the single cable from the flap lever in the cockpit into two cables going to each wing torque tube horn. It's time to move on. Mark G is going to advise me on fuel tank tubing required prior to closeup. There is not much instruction on this item, so I will wait until I talk to him to start. Fuel lube (sealant) arrived today from ACS along with more snap bushings and nylon fairleads (my wicks hardware list called for 16, but in fact 20 are required. Mark sent the hundreds of nut plates required for all the inspection hatches, and they arrived today, along with another set of Brake master cylinders for the back rudder pedals. We need them for training ourselves. We were going to go with heel brakes but Mark said it would be too problematic to engineer this. We accepted his advice. If we really hate them we can remove them after we are all checked out.


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