The organisation I work for operates helicopters and I've built this svg file to allow me to use this as a marker. I've named the file in the convention of other files and placed into the appropriate folder, while testing to ensure the marker can be colourised in the same way as other svg markers.
I'm adding this as others might benefit from the work I've done.
...and update all bundled SVGs to suit
Non-bundled SVGs must add:
fill-opacity="param(fill-opacity)"
and
stroke-opacity="param(outline-opacity)"
to enable transparency support
default value is non 0
using the monstrosity:
zerowidth='!0'; grep -R -rl -P "\"param\(outline-width\) (?${zerowidth})(.*?)\"" | xargs sed -i -b 's/\(param(outline-width)\)[^"]*"/\1\"/g'
(fix#10908)
