u/ValdisFox

Trying to figure out how to properly secure these props and I can't seem to find any consistent advice online.

All motors are autostrutted to grandparent

Left to right the propellers are:

Heaviest autostrut - hits max rpm, fairly stable but can fail structurally if at max rpm for too long

Grandparent autostrut - exceeds max rpm, catastrophic structural failure

Root autostrut - lowest rpm, very stable

Rigid attachment - about half max rpm, very stable

What do? I need the rpm but I also need the props to not destroy themselves

Struggling with the thrust on this Eve plane and I'm suspecting I've set something up wrong but no matter what I tweak I can't break through around 50m/s. I've been talking with other Eve plane creators and with a similar mass and the same number of motors and blades they're reaching flight and speeds of around 100m/s but I've got a glorified car at the moment. Can anyone spot anything wrong with the set up?

Link to video of a takeoff attempt with aeroforces overlay

Plane won't fly level and it's killing my lift for the last few kilometres. It's flying straight, it's not inducing a turn but no matter how much I roll it back level it will always tip one wing down. Sometimes it's one wing, sometimes it's the other but no amount of countering will keep me level. It's not trim and everything is symmetrical. What the hell is going on?

Back again with the Eve shuttle prototype. I'm finding issues in my ascent from Eve, when I reach around 11-12km I'm having really bad stability issues, I'll suddenly start yawing and rolling like crazy and eventually end in a backflip. I'm starting to suspect this has something to do with my CoL placement, particularly while pitching up and when rotated in the hangar it shows the CoL ahead of the CoM.

If I'm right about this it presents a new problem in how I can keep the pitched CoL far enough back without massively impacting the level stability. I already tried messing with wing placements to move it back and I had severe nose-heaviness issues. Any bright ideas?

For clarity in case anyone isn't familiar with what I'm doing, the plane in the relevant phase of flight is running on 8 rotors in the service bays inside the wings. When open they do bring the CoL forward by a not insignificant amount but I've tried to carefully place them to not have too much impact. They'd always be open for this entire section of the flight anyway