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I started work on a 3D printed Wasp Junior engine, and this topic will give me space to write about the challenges involved. I've seen a lot of nicely done radial engines here, usually involving added wiring detail, so I started this project out of curiosity. Could I 3D print the whole engine, including the wiring? This engine project isn't designed to fit a particular airplane, which means the mounting system and exhaust system will need to be adjusted to fit. My goal is to build the engine with "short stack" exhausts and no mounting ring. Here are some repeat photos from the original Wasp Jr. thread. First, a CAD rendering of the forward engine block. I'm using AC3D for the CAD. Next, a print of the block and one cylinder. This was the first attempt. I fixed a couple things and printed again. Here is a screenshot of the slicing step, using Chitubox 1.91 for slicing. I only had to design the cylinder once and after adding supports I cloned it eight more times. Here is the support system I'm using for the ignition ring and wires. This is by far the most fragile shape I've printed. I ruined the first one while trying to remove the supports, so for this attempt I moved the supports a bit to make them easier to remove later. Here is one of the ignition ring parts after printing. I removed most of the supports while the part was still pliable, then I put them in the curing box for the final curing step. Here's a recap of the equipment I'm using: CAD: AC3D Slicer: Chitubox 1.91 Printer: Elegoo Mars 2 Pro Resin: Elegoo standard grey -- Dave

Hello, I would like to announce that we have released 2 new products: 1/32 MIG 21 LANCER conversion for TRUMPETER MIG 21 M/MF KIT and 1/32 ENGINE EXHAUST for the TRUMPETER MIG 21 M/MF KIT Actually the first kit is a remake of an older version with new improved molds and wit real decal included for two LANCER C versions (the first one had printed decals) The LANCER conversion contains as a bonus the ENGINE EXHAUST Also we thought that will be a good idea to release only the engine exhaust since is very easy to install and has a more realistic look with the R13-300 engine provided by the TRUMPETER kit

So, if someone needed a couple of C version Pratt and Whitney R2800 engines for a 1:32 model project, how would the Collective suggest he goes about sourcing them? Scrap a HobbyBoss P61, maybe? All suggestions gratefully listened to! Me? Nooooo, not me. A mate, honest! I've got too much on my plate already....... Tim