Скачать или смотреть Cox Tee Dee .020 & Exhaust Chamber (Part 4) flight.

Well, here's the flight test. I must say it was really hot, humid, and heavy; in other words, the atmosphere wasn't the best. I should also mention that installing the muffler with the gas control valve always reduces the RPMs, which means a loss of power. The test went very well; the device perfectly fulfills its initial purpose of controlling the motor. I should also mention that perhaps the model airplane isn't the most suitable, since for this type of motor configuration, a model with different characteristics might be even more enjoyable—a high-wing model with a thinner chord, ribbed wings, etc. However, the result was good. The model flew stably and safely at all times, but the lack of speed is noticeable. In any case, it was very entertaining and encouraging that the device's design works. Perhaps making some further adjustments to the device itself could help achieve a few extra RPMs, but everything is so small that there's not much that can be done.
I hope you enjoy the video; it was a beautiful afternoon. The club's dogs were always present, as you can see in the photos! Maybe they'll end up learning to fly model airplanes, haha.
Happy 2026!!...we've already begun!