Next step in this build is to go lighter and get it in-line (as much as possible to FRA rules)
This means that from 17kg Liftoff must shed at least 3.6kg (quite a lot!)
The single heaviest part of the machine is the flipper arm, then the motors, and then the pneumatics...
The motors weigh 1kg each - if I get to replace them by two Gimson GR02 I'd save more than 1 kg.
The flipper arm is a problem, at the moment its 1 square section 1.2mm thick, its quite heavy...don't really have much options, never seen titanium square section, so next option is aluminium.
Think I'll use alu square section 1 by 3.2mm thick 6082T6 but not sure if its strong enough as I need to put some welds to it as well And besides I have to calculate the weight lost bec if it's not too much it might not be worth while...
Any advice re aluminium flipper arm?