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Showing results for tags 'manifold pressure'.
Found 2 results
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Hey guys and gals, I bought the Saratoga from Carenado really because I'm thinking about buying a real one and wanted to see how it does for cross-country trips. I've encountered a problem relating to engine performance that I just can't figure out. When I get to cruising altitude, I can get the prop set to where I want it and the mixture correct, but even with the throttle maxed, the manifold pressure won't go above 22 inHg. In the reference manual that comes with the plane it says for cruise: "75%, set per power table." But there is no power table. I did research online and found that for 75% power you should go for 24 inHg and 2,500 RPM (another suggestion I found was 25 inHg and 2,400 RPM). But I can't get anywhere near those inHg settings. Another thing to note is that the fuel flow gauge underneath the manifold pressure gauge has two lines, one for 65% power and one for 75%. I don't even get near the 65% line, so I know I'm not generating even 65% power. So I put along at 120 mph. I may as well be flying a Cherokee 180 for that speed. What gives? Any ideas? For info, yesterday I was at 8,000 feet and the mixture was set at about 35%. CHT and EGT were both fine. I'm just not getting any umph! Any suggestions would be greatly appreciated!
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Hi all. I recently picked up the Lionheart Creations TB-21 GT as I fancied a decent IFR touring aircraft that can fly at altitude. However, when attempting to fly above 10,000ft it almost starts behaving like a normally aspirated engine rather than a turbo. Looking at the PIM, I was expecting around 24.7inches of manifold, with 2500rpm & 75% power at 13,000ft. Instead I was at FULL power, 2500rpm and it was barely scraping 20 inches of man-pressure. I uploaded a YT video demonstrating my findings: https://www.youtube.com/watch?v=kj2nyvg3Xwc (the video is still processing as I only just uploaded it) As far as I'm concerned I wasn't doing anything wrong. All the systems were on, fuel valve selected, mixture leaned using EGT, oil pressure & temps in the green, I tried flicking on & off the fuel pump and changing the prop pitch, but nothing was getting me close to the numbers I was expecting. Am I being a dafty? I am using MSFS v1.33.8.0 and the latest release of the Lionheart TB21 (v4.4.2) Any input would be appreciated, with thanks
