Hi, my name is Kieran. I typed my name wrong on sign up...
I am one of few who build very accurate technic scale motorcycles.
I have experimented with the liftarm equilateral triangles found by googling "lego technic triangles brickengineer".
I have made several triangular planetary or epicyclic gear systems. They contain the sun and planet gears, but no annulus (outer inverted gear casing).
They may be suitable for many uses, including wheel hubs and turntables.
I wanted to share them with you.
Various gear ratios. The two on the right use normal gear meshing, however, for the ones on the left, I found pairs of bevel gears inverted to face one another not only a good fit, but the method locks the sun gear in line with the planet gears. The arrangements on the right need support for the sun gear axle. Plenty of room for reinforcement and attachments. Lets see what you can use them for!
Putting the epic into epicyclic gearing
For more information about planetary gears visit the wikipedia page. (just realised I cant post links yet.) Google it.
One of my motorcycles, a since superseded design. I now have ribbed hose for exhaust, however I have no shame in painting the tire writing. It looks good