(...) I do!! I've always wanted to try & model a steam engine but those pnuematic switches are so darn tight!! So there's another suggestion on my Lego wish list - a sliding pnuematic valve. Maybe one day..... ROSCO (23 years ago, 10-Sep-01, to lugnet.build, lugnet.general)
(...) The pneumatic switches may seem tight, but the linkages have no trouble moving them thanks to the considerable power of the pistons. The tricky part is making sure the 2 sides are exactly 1/4 out of phase with each other and trip when the (...) (23 years ago, 10-Sep-01, to lugnet.build, lugnet.general, lugnet.technic)
