Gas engine scavenging design
I am an RC fan but have only delved into the nitro aspect of it. Nitro engine use the loop (Schneurle) scavanging design, and I am wondering what scavenging design gas 2-stroke engines use. All the nitro engines I have seen and touched are all loop scavanging, I have yet to see a nitro engine that is cross scavanging.
Gas 2stroke engines from what I understand are cross scavanging mostly. But I want to know if this is true for RC gas engines. Do they also make loop scavanging gas 2stroke engines? Or are there a mix of cross scavanging and loop scavenging gas 2stroke engines in the RC world?
Also, as for mods, nitro engines are very easy to mod with a rotary tool since the sleeve pops out. How do you gas engine guys mod your largetr 2stroke gas engines? Are the sleeves integral with the block or do they slide out of the block like the little nitro engines' sleevs do?