Recent content by RodRico

Very interesting project. It interests me primarily because I am currently designing a form of two-stroke with cylinder volume of only 2.1 cc. These small engines bring all sorts of challenges, and I'm interesting in seeing how others approach them. I've been in design for about 3 years now...

I've been using Solidworks since 2013 and still find it frustrating at times. I learn something new on every project. I haven't branched out to look at other CAD packages because, as a US military veteran, I get the whole package including simulation (FEA, thermal, CFD) for only $20 per year...

Cogsby, HCCI is not diesel. The entire charge lights of very quickly. The video at https://youtu.be/oNCBbcINHuk shows just how much faster HCCI combustion is than spark ignition (much less diesel injection). Friction is a function of pressure and contact surface area, not quantity. The total...

Good point. I hadn't considered setup time, only shop floor space.

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Cogsby, No. The high side temperature in my engine is 2150K and the low side is 288K, so the max theoretical Carnot efficiency is 87%. If it were an Otto Cycle engine, it's theoretical efficiency would be limited to 68% given my compression ratio of 21:1. It's not an Otto or a Diesel Cycle...

I’m certainly no expert, but after much research, I’ve decided to go with the Tormach PCNC 770 with the Rapid Turn lathe accessory (turns the mill into a lathe). For my project, the smaller/cheaper PCNC 440 would be suitable, but it doesn’t support the full line of accessories available for the...

Wow! Very impressive progress over only two years! I hope mine goes so well!

Hello! After 4 years of math and analysis, I'm just now starting final design of a prototype of a new patent-pending engine design. The prototype will only be 50cc, and I see a lot of helpful information here, so I thought I'd join. Rod P.S. You can read a somewhat outdated description and...