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Thank you.Wide Open Throttle.
What rpm are you climbing at? What airspeed? If you are climbing at 90k/100mph and 2550 rpm or greater you are making power. If you can't achieve those numbers you probably have a leaking carb heat box.
I have to check. I hadn't considered a leaking carb heat box, but I think you're on to something there. It has been years since I did the Power Flo check, but I am now wondering whether the CH box was leaking then, too, perhaps giving me a false negative result.
What is the best way to check the CHB? I have a good A&P, but I like to know enough to ask him decent questions.
Les,
The Powerflow added 50-60 RPM for me at cruise on a Sundowner. (I have a digital tach, so measurement of the before and after was easy.) You would have to decide if that's enough of a power gain to be worth the price.
I should further add, that during the summer months, 10,500 is the max I plan for on a hot (~100 F) day, due to DA considerations. I have made 13,500 during the winter months though, with just myself onboard. And that was before the Powerflow was installed.
I'm a little puzzled when you say the plane struggles to reach 5k to 6k. That should be easy to attain under any legal loading.
I'll let the brain trust here throw out some more suggestions for you. Not an A & P, but I have been flying Sundowners for over 20 years.
Most of the time, I struggle to get to 5 or 6k. If I have a passenger in the front seat, I'm hanging on to the prop to make it to 5k.
The engine has excellent compression, and makes 2350 static. I haven't done anything to the prop, and I don't think the previous owner did either.
I wonder what's wrong?.
Les,
Something is not right with that. You need to do some basic troubleshooting to establish where the problem is.
First, fly (solo) @ 5k, WOT, and record the RPM after a few minutes of level flight.
Next, load 200# (not a misprint) of ballast as far aft as you can get (within the cabin), and repeat the same flight test, on the same day.
Start a new thread with the results so we can walk you through the process of elimination.
I'm looking at Spruce and I don't see numbers that correspond to that version of the HA-6. Do you by chance have a reference? I assume they are all the same for all 0-360-A4Ks.