Started to set up the main undercarriage mount which forms the rear section of the engine mount. Using the frame that was fabricated previously http://tailwindbuild.blogspot.com/2008/05/4th-may-2008-engine-mountings.html
the mount corners were located on the mount bolts.
Each undercarriage leg is 1-3/8" diameter. They fit into a sockets made of 12" lengths of 1-1/2" tubing, which in turn have collars of 1-5/8" tubing reinforcing them at top and bottom. To start the build of the mount the 1-5/8" reinforcing tubes were set at 40 degrees to the frame vertical centre-line and supporting brackets screwed to the building board to ensure that these angles were preserved as the tubes were raised to the required 28 degrees to the horizontal. The reinforcing tubes were then tack welded to the supporting brackets and the bottom mounts. Eventually most of the central section of the reinforcing tubes will be cut away but the mount will be completed before this is removed to ensure that the two pairs of collars are accurately in-line to take the 1-1/2" tubing and that the 1-3/8" bores of the mount sockets are not distorted by the welding process. The the bottom tie bar was fabricated and tacked in place. Next job is to fabricate the the rest of the various mount tie bars and tack them into place before final welding.
