KitLog pro

Powered By Kitlog Pro v2.0

Steve's CH750 Cruzer (N750SB)
' style=
Date:  8-25-2016
Number of Hours:  6.00
Manual Reference:  
Brief Description:  Upper Spar Attachment Fitting, Remove bottom skins

This was essentially spar fitting day. Lots of forum discussion about this, so I thought carefully what I was going to do. I decided I would tackle all of the fitting issues at this point. Hopefully it will pay dividends later. I had purchased a new drill press and bench grinder from Harbor Freight, so unpacked and got them set up. Drilled and cleco'd the spar root doubler and angle to the wing. Bolted in the fitting. Decided this would be the time to drill the fitting, so removed and drilled bolt hole according to plans. Drilled pilot hole in fitting first with drill press, reassembled to wing, then drilled pilot hole in doubler. Then drilled to full size both fitting and doubler on drill press using stepper bit. Reassembled to wing and added bolt through hole. Traced outline of fitting on doubler. Disassembled and trimmed doubler so bracket would fit. Reassembled to wing with bolt and bracket attached. Determined where to drill for A5 rivet hole to clear bracket. Following the plans on the rivet hole does not provide clearance. Drilled rivet hole in fitting and doubler while attached to wing. Disassembled, cleaned up and deburred parts. 2nd photo shows the results. I did rivet the doubler to the angle, but cleco'd everything else. I'm convinced that the only reason that PITA rivet hole is there is to maintain alignment of the bolt hole in the fitting and doubler when they eventually get inserted into the bracket when the wing is mounted.

With the fitting done, I removed the bottom skins in reverse order, deburring outside holes as they got uncovered.
' style=

Mounting hole drilled, marked for trimming.

Mounting hole drilled, marked for trimming.

' style=

Fitting parts with rivet hole

Fitting parts with rivet hole

' style=

Bottom skins off for debur.

Bottom skins off for debur.

' style=










Copyright © 2001-2024 Matronics. All Rights Reserved.