It’s been a busy few days, I’ve done a bit of FreeCAD, a little horseing and got the car tested.Below is a schematic GIF file showing a uniflow steam engine. I pinched this from a chap called DAN GELBART. As you can see he uses a solenoid to hold open the inlet valve. It’s worth investigating but I fancy a double acting engine so this little picture is here just because it’s pretty.I have created a top fork yoke mainly for practise.I can also create working drawings and dimension them…..It’s a smart bit of software. I am still struggling to get the clicks and drags in the correct order