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What's New:
2/22/07- Finish welded the engine mount spools in the corners of the
fuselage.
Engine Mount
2/1/07- Since I didn't have a spare
IO-540 case to use as a jig, I couldn't build my own mount so I
ordered one from Steen Aerolab. Expensive, but they did a good
job on it. Notice that they didn't use a mounting ring, but
all straight 4130 tubing.
2/1/07- The first thing that I did was
bolt the spools onto the mount to see how they fit into the 4
corners of the fuselage. The bottom is fine, but I have to
form the tops of the 2 diagonal tubes since they interfere with
the spools.
2/18/07- To form the top corners of the
fuselage at station 0 to accept the 2 top engine mount spools, I
made a simple forming tool out of 9/16x.063 and 5/8x.035 tubing.
2/18/07- I heated the intersection of
the tubes with a torch and hammered the forming tool to create the
concave bed for the upper engine mount spool. It only took a
few taps and checking the fit with the engine mount.
2/18/07- A perfect snug fit!
Thanks to Manuel Benito for this suggestion. It sure was
cleaner, stronger, and easier than my first plan to notch and weld.
2/18/07- Here is the mount fit on
the fuselage.
2/22/07- The engine mount spools are
welded in place.
2/22/07- This is the inside
corner of the engine mount spool.
