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Date:  5-28-2022
Number of Hours:  2.80
Manual Reference:  23-01
Brief Description:  Engine mount - New jig required

Welder has tacked up the first engine mount, and demanded a steel jig to enable heat treating/de stressing the resulting mount. He COULD just weld it up but does not know why anybody would be happy with that... He didn't like the access to all the weld locations with the wood jig either. Hmmm.

Suprisingly, the steel to make the jig only cost $120! 40x40mm 4mm wall square mild steel tubing, some 8mm plate and some 3mm 25x25mm angle.

Make a mockup of the required jig from 40 x 40mm oregon and bits of mdf, just to get my head around the concept. When I fit the existing tacked-up mount it is out to the shithouse! One of my firewall points was misplaced by 1/4" and I had rigged the angle between the firewall mounts instead of the dynafocal cups. Faaaaaaahhhhhkkkkk!

When I offer the mount to the firewall it all looks lovely, except for the 1/4" boo-boo being addressed.

When I offer it to the engine I note the bottom cross tubes are too close to the sump. The lower part should be in the same plane as the 3/4" tubes, and mine aren't. Decice to put in a rail to orient them like on the Pitts one.

I don't regret the original jig, because orienting everything without the tacked up mount would be hard, even with the required adjustments.
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Jig for Pitts, welder want me to make one for the Cozy

Jig for Pitts, welder want me to make one for the Cozy

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Extricating the tacked up mount

Extricating the tacked up mount

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I need to make this out of steel...

I need to make this out of steel...

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