Our cooling is generally fine, but on hot days when we stay in the pattern, the CHT’s get warmer than I would like. Luckily we know Terry Schubert, of CSA fame, and he’s just the guy to give us some tips. So, we setup for him to come down with some aquarium hose, air stones, and we hooked them up to our engine cooling plenum, top and bottom… and went out for some test runs. We took a bunch of data at 3,000′ pressure altitude (altimeter set to 29.92″) to see how much pressure recovery we’re getting from our NACAs. Ours is not as good as you might see on some well designed EZs, but for for reference here’s our data.
Basically it’s telling me that we should cruise climb at 130 because we get much better cooling there than even at 120. Yes, we won’t get the performance of Vy, but a cool engine is a happy engine. I won’t be obsessing over upgrades, but we did identify several places where we’re surely losing cooling air to leaks, and I’ll begin slowly addressing them and checking these numbers again to see if we’re making improvements. Some other captured data:
Posted By: Brett FerrellSaturday May 31st, 2014 at 1:34 PM