20220423
Decided to tackle another WWI rotary engine as my next project – the Oberursel UR III that was used to power the Fokker Eindeckar. This is a double row, 14-cylinder engine so plenty of opportunity for large fingers to get in the way of placing small parts.
Started a couple of evenings ago with the crankcase body and covers. Not much clean-up to do other than trying to straighten up some of the cylinder seats so the cylinders can be glued on. I decided to not paint the crankcase so it was just polished up with a metal brush. Once the engine is fully assembled it’ll be clear coated so there shouldn’t be any issue with later discoloration.
Today was given over to prepping the 14 cylinders. Typical casting marks on small pieces to be filed off and the occasional extra flashing to remove. The cast spark plugs at the tops of the cylinders were masked off (they will be painted later) and the cylinders have been sprayed a flat black. They’re being left to dry overnight; will assemble them to the crankcase body tomorrow.
Decided to tackle another WWI rotary engine as my next project – the Oberursel UR III that was used to power the Fokker Eindeckar. This is a double row, 14-cylinder engine so plenty of opportunity for large fingers to get in the way of placing small parts.
Started a couple of evenings ago with the crankcase body and covers. Not much clean-up to do other than trying to straighten up some of the cylinder seats so the cylinders can be glued on. I decided to not paint the crankcase so it was just polished up with a metal brush. Once the engine is fully assembled it’ll be clear coated so there shouldn’t be any issue with later discoloration.
Today was given over to prepping the 14 cylinders. Typical casting marks on small pieces to be filed off and the occasional extra flashing to remove. The cast spark plugs at the tops of the cylinders were masked off (they will be painted later) and the cylinders have been sprayed a flat black. They’re being left to dry overnight; will assemble them to the crankcase body tomorrow.