david Posted October 10, 2018 Report Share Posted October 10, 2018 For Rotax 914 ground testing, how much CFM of AIR is required for cooling? Link to comment Share on other sites More sharing options...
Roger Lee Posted October 10, 2018 Report Share Posted October 10, 2018 I doubt anyone will know this. Link to comment Share on other sites More sharing options...
Anticept Posted October 10, 2018 Report Share Posted October 10, 2018 As much as required to keep the cylinders cool. If you're building a testbed, just attach a scoop so that the prop air will blow over and down through the cylinders. Make sure the radiator is straight on with the incoming air flow. If you're going to dyno it, centrifugal fans (known as blower fans or squirrel cage fans) move a lot of air and should be good enough for blowing down over the cylinders and one blowing through the radiator. It's surprising how little air is actually needed. Just make sure you have your temperature gauges hooked up (i'd recommend having them on the other two cylinders as well for testing). Link to comment Share on other sites More sharing options...
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