1066 HAWK RESTORATION

Here is another rare English beast from the far and distant past, the 1066 Hawk. This old boy needs a little bit of TLC to bring him back to full health and strength.

Here's how he arrived from Adrian Duncan.

As usual first step, strip him down and give him a jolly good bath.

Here he is all dismantled, ready for inspection.

Well not too bad, rods worn in the little end, due in part I think to a poorly fitting gudgeon pin which has also damaged the cylinder liner although not to badly, thankfully.

First step will be to clean all the parts and make up the tooling to carry out the necessary repairs.

Here we have the main parts still useful all cleaned and ready to go back together.

Here is the front housing assembly all sorted and ready for refitting to the main case.

And here's the main case parts all clean and ready to be reassembled.

Progress so far.........

Next step is to manufacture the tooling and new parts needed to complete the engine.

Here's the restored cylinder liner with the grooves machined out and all nicely lapped ready for the new piston and rod assembly.

Here we have the replacement piston blank and gudgeon pin ready for final machining to the reconditioned cylinder liner.

Now we'll just whip up a new conrod and we're almost ready to put him back together.

 

Now it's time to final machine the piston and fit it to the cylinder liner.

Here's the new piston with the transfer port all machined in and the rod fitted ready for mounting to our special tooling to final machine the crown and bore dimensions. After that it all off to the lapping machine to final fit to the original cylinder assembly that we have previously restored.

Here's the new piston all finished and ready for reassembling to the rest of the engine.

And all fitted up to the bottom end.........

Now that's all done we will have a look at the very poor fit of the cylinder to the case and make a special gasket of the correct thickness to allow us to tighten the cylinder unit onto the case in the right place and still provide a nice gas seal at this join. Adrian had also asked us to make a locking ring for the intake tube to ensure against it coming loose in operation.