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