Tim Page wrote: ↑Mon Mar 01, 2021 4:54 pm
I do agree though that it would be very costly to produce the complete cast hull for a Sherman but who knows what might be possible in a few years time.
Cheers
Tim
I'd love to see everything made! The more 1/6th scale kits the better.
But having quite a bit of experience with casting (including getting parts done in the UK)... costs are astronomical. Patterns for most items start at about 25,000 pounds. For simple patterns. The complex patterns run 100,000 - 150,000 pounds. That's before the first casting is made. That's just the first patterns to shape the sand.
Then you have about a 10 percent scrap rate if the casting is complex at all. Thin castings are the worst. Then machining of the casting.
One of the great and interesting new technologies is 3d printing of sand cores. That has reduced costs some. But involves large programming costs and then printing each core. And after the core is used, you destroy it. So any 'reasonably' large casting costs from 1000 - 5,000 pounds. Before any machining is done. The closest thing I can think of to a cast Sherman Hull would be some of the water pump castings we have made. In runs of 20 - 50, they are about 800 pounds ($1,000 +-) each before any machining is done. Small lot stuff is spendy!
Plus we look at lead times of 12 months. Because small lot casting places are really backed up! And for automotive stuff, we can't even get the phone answered when it's in the "Formula 1" cycle. In other words... this year's stuff is being made for the F1 teams.
I think a cast-hull Sherman is one of the coolest things out there. But would be a huge investment.
As for the Goliath... a modern interpretation is sheet aluminum and machining. But I also agree there are cool things out there that can be just as much (or more) fun than a rolling box of "Der Kaboom!" But I'd still like one. I just think they are a fascinating bit of Vunder-Veapons folly that is so representative of the Germans ill-fated concept that they could technology themselves out of utter defeat. When the reality was that "Quantity had a Quality all of its own." (Attributed to Stalin, but not likely him... he wasn't a deep thinker.)
That said, given the choice between any Land Rover and a Goliath... I'd take two Land Rovers and three on Sundays! But I still think a Goliath would be wicked cool!
Cheers,
RPR