Tip Up Canopy Cabin Frame
February 12-17, 2007
I spent this week constructing the cabin frame, sometimes called the roll bar, per Van’s drawing 39. After riveting the 613 channels and attach brackets, I tried a test fit to the fuselage Thursday evening. It seemed to fit pretty well but after looking at it closely Friday morning and taking some fairly precise measurements, I realized it was not perfectly square on the fuselage. At that point I thought I would need to order a complete new set of channels from Van and start over. It was discourging because I thought I had been really careful in trying to keep the channels square as I was building them.
However, after I removed the assembly from the fuselage, I found that roll bar had a slight twist in it that was easily straightened. I then re-attached it to the fuselage and upon further review, it square to the centerline of the fuselage and fit very nicely.
