Rainer wrote:Hello Greg,
I have forgotten to comment this
gondolier88 wrote: I notice that the cylinder has an indented gland that encroaches into the cylinder, with a corresponding piston underside shape.
I think that feature is mostly to reduce the piston weight by thinning it and still keeping the piston ring section heigh enough by this denting. But yes, it also helps to press the water out of the cylinder...
Yes, you're right of course, the main reason is to reduce weight, but, as you point out, it also aids ridding the cylinder of condensate. The main reason for making the pistons conical was that they were inherently stronger than flat pistons, meaning they could be made thinner- however, by making them thinner it increased the swept volume of the cylinder- another reason for indenting the gland into the cylinder as Aheadslow points out.
Re. The drain height- you are right, it was difficult to tell the heights from the small 3D drawing, but you should be able to remedy the slight problem.
I'm really looking forward to seeing this block come back from the foundry!
Greg