air engine

[krv3000]

right a bit more mad up the connecting rod sos not many picks as I got cared a way but a new way of picking up your pop punch  marks is use a needle a long one in your tale stock chuck I tried to tack a pic of this but it is a bit fuzzy but the way it works is when the needle is in the ded  centre of the pop punch  and you spin the lathe chuck the needle will stay still if its not in the centre it will wobble any way drilled 1.6 mm and then tapped m2 then split the block in two then stuck the two haves on to a peace of aluminium and direst the two cut parts daw to size  then screwed the two back to gether and marked out the centre for the big end this was drilled 4.8mm then reemd m5 then marked out the centre for a length  of m6 brass rod to be screwed on to the big end  then mad a start on the cros hed made up two pieces of 10mm by 10mm by 30mm long then on one marked out the slot cut most of it out then finish it of with a file the slot is 4mm wide  right picks