Engine Mount and Gear Attachment ( 2 hrs )
Separated on band saw the "heavy" aluminum angles for Gear Attachment per Sect 40A-02 in Step 3 - then ground smooth. Per supplemental insert to Step 9 at Sect 40A-03, filed clearance for U01404-L & -R Upper Gear Braces due to interference with Seat Rib and Doubler. Required a few iterations to get just right. Spent lots of time on phone with Vans product support to determine the Engine Mount weldment has 1.675" long tubes (vs 1.375") for upper bolts such that specified AN6-24A bolts are too short. Vans mailing AN6-26A longer bolts so correct thread engagement. Their inventory is all correct at 1.375" - so mystery about how mine was welded with incorrect tube length. Note: Vans will NOT expedite replacement parts (not their policy)...aarrrgggh ! They also aren't concerned other builders may have completed their build with insufficient thread engagement, believing apparent at assembly. In another issue, when I couldn't find the Gear Shims, determined they should have been included Gear Shims F14129AB (0.016") and CD (0.025") -- but missed including in inventory for QB Fuselages (quick build). In the mail now... double aarrrggghhh !
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Upper corner - bolt is too short |
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Lower bolt....correct bolt length |
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culprit is wrong tube length in weldment |
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sawn to shape, deburred |
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extra instructions requiring filing clearance prior
to following Step 9. |