duckduckgoose
Well-known member
TLDR: powered glider keeps rolling either way and can't be trimmed out
BACKGROUND: Hi, been a long time since I've been in here but I have a rolling issue with my latest build, a twin boom sailplane. The plane has an upscaled tiny trainer wing (lengthened and flaps installed as well) and has a wingspan just shy of 1900mm with a slight dihedral. I am basically rebuilding a previous twin boom that was hugely successful.
THE ISSUE:So the issue is that I can't seem to trim out a rolling tendency that was completely absent from the previous build. The previous plane was so stable, that many times, I could put the controller down once the flaps were engaged.and just watch it go around in lazy circles (until I lost track and it 'wandered' into the woods). This plane starts off straight, then starts leaning to the left or right, and just keeps rolling tighter and tighter as it turns. I have tried trimming but it seems to just then roll the other way, there seems to be no middle ground. Should I be adding polyhedral wing tips? Does anybody know what might be going on? The tail booms are the same length as the old one, and the vertical fins are slightly larger to compensate for the slightly longer wing.
Thanks for any feedback!
BACKGROUND: Hi, been a long time since I've been in here but I have a rolling issue with my latest build, a twin boom sailplane. The plane has an upscaled tiny trainer wing (lengthened and flaps installed as well) and has a wingspan just shy of 1900mm with a slight dihedral. I am basically rebuilding a previous twin boom that was hugely successful.
THE ISSUE:So the issue is that I can't seem to trim out a rolling tendency that was completely absent from the previous build. The previous plane was so stable, that many times, I could put the controller down once the flaps were engaged.and just watch it go around in lazy circles (until I lost track and it 'wandered' into the woods). This plane starts off straight, then starts leaning to the left or right, and just keeps rolling tighter and tighter as it turns. I have tried trimming but it seems to just then roll the other way, there seems to be no middle ground. Should I be adding polyhedral wing tips? Does anybody know what might be going on? The tail booms are the same length as the old one, and the vertical fins are slightly larger to compensate for the slightly longer wing.
Thanks for any feedback!
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