12.08.2010, 14:45
There is a simple rule of thumb with mixtures.
Higher you go, the less you'll need.
If your aircraft plumes a brownish smoke trail. You have too much fuel in the mixture. And you'll need less of an percentage.
A 120% mixture is very rich (More fuel than air) This can aid in cooling. But takes in more fuel.
A 70% mixture is lean (More air than fuel) This can bring a very small amount of power gain. But will start to over heat the engine quicker.
If your look for some simple guides to get a rough idea on Mixtures and how it can effect an engine. It can bring a better understanding. But when tinkering with mixtures. A small amount goes a long way.
Also, with super chargers. If your not sure when to use it. Put it to stage two. And examine the effects on the engine. Is the engine slowing down in RPM? (only slightly) Loss of response? If its any of these, its too early to push to stage two. You want ideally the opposite effects.
Higher you go, the less you'll need.
If your aircraft plumes a brownish smoke trail. You have too much fuel in the mixture. And you'll need less of an percentage.
A 120% mixture is very rich (More fuel than air) This can aid in cooling. But takes in more fuel.
A 70% mixture is lean (More air than fuel) This can bring a very small amount of power gain. But will start to over heat the engine quicker.
If your look for some simple guides to get a rough idea on Mixtures and how it can effect an engine. It can bring a better understanding. But when tinkering with mixtures. A small amount goes a long way.
Also, with super chargers. If your not sure when to use it. Put it to stage two. And examine the effects on the engine. Is the engine slowing down in RPM? (only slightly) Loss of response? If its any of these, its too early to push to stage two. You want ideally the opposite effects.