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I have the little IO-320, not the larger 180hp like some of you but I cruise at 155 kts TAS and lean back to get that. My GPH varies with altitude. Most times my altitude is determined by whether I brought the O2, how far I am going and weather. My TAS does not change with altitude only GPH. I can and do go to 12k or so and regularly see 5.8-5.9gph at that altitude. I can stay around 8.5k and still be around 6.5 GPH and 155 TAS. As Bill says, I love this wing.
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Wow
Mark,
This is what i was hoping for in selecting the 9: speed the same up high but lower fuel flow. Thanks for the data. This is great stuff. Need to find what Catto prop you have! |
Greg & Mark,
You two bring up a good point, the -9 doesn't really need the (I)O-360 to be a good performer. It's beauty is in its ability to cruise efficiently, which is exactly what Van hand in mind when he designed it. The reason for the O-360 in my -9 is that it was only $500 more expensive at the time and 20 lbs heavier. |
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I don't do enough formation flying to justify the CS Prop and when I do, I just have to remind lead not to chop the throttle. The funny thing is what when I'm on someone's wing and they have to land they drop like a rock whereas I just keep gliding and gliding and gliding. |
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I don't recall the exact prop but Craig is one of those guys you trust to make the right recommendation. I went with a three blade and nickel leading edges. Still looks new after 350 hours and some trips with heavy rain. My last trip to Texas through a front took one of the Catto stickers off the blade but the leading edges still look great. I have the Catto, P-Mags and fuel injection and I have had a few people tell me it is the smoothest plane they have been in. (they weren't referring to my flying skills) |
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