Every transport piece moves material at belt speed and capacity (t105)

tools/scenes/t105-chain.js

@@ -0,0 +1,13 @@
+// Load test/fixtures/t105-transport.js first. The measured chain, running at heavy feed.
+for(let y=64;y<248;y++)for(let x=24;x<288;x++) {
+  const i=y*W+x;
+  part[i]=0;mach[i]=0;bgm[i]=0;
+  setCell(i,y>=240?STONE:EMPTY,20,y>=240?F_NAT:0);
+}
+for(let x=24;x<288;x++){surfY[x]=240;dirtY[x]=250;}
+updateRoof();
+const chain=transportChainFixture();
+for(let k=0;k<4800;k++){
+  transportFeed(chain,16);simTick();transportCollect(chain);
+}
+window.CAM=[152,144];