Question Feedback on my SketchUp design?

Hello!

I've spent the last couple of weeks learning SketchUp and sourcing parts. I've put together this preliminary sketch of what I'd like to build, and would love to get some feedback. Motor placement isn't final, and the seat is centered on the frame, as I don't yet have anything assembled to figure where the COG would be.

Some details:

1. This will be for flight/space sim in VR
2. Controls (HOTAS) will be mounted on either side of the chair, similar to the config you see in Elite Dangerous (and many builds on this forum).
3. The frame will be primarily aluminum and bolted/riveted together. There will be 2 3x3 steel plates that will be welded to the top and bottom of the u-joint - those plates will be bolted to the middle aluminum post, and then an aluminum plate bolted to the seat frame.
4. Those triangles on the side are alternator brackets- loved the idea and look on @noorbeast's DX racer.


After working on this model a bit, my thoughts are:

a. Probably too tall?
b. Maybe too much 'frame' between the seat and the u-joint
c. I'm concerned that the position of the motors is not great. I've been referencing this thread to try and understand the motors position, and where it should be at rest (not 90 degrees), etc..

Would love to get some feedback on this first draft.

Here are some images:

@noorbeast-

Thanks for the feedback. I will redesign with A and B in mind.

Regarding C:

Are you saying moving the motors and mount points forward will create more leverage for the motor, or does it give me a greater movement for pitch and roll, or maybe something else I'm missing?

I've been playing around with SimCalc (great tool, thanks - I did read about it in the FAQ but didn't get a chance to use it until now). And I plugged in my motor details, along with some rough estimates motor and mounting position, and I am wondering what results are considered 'good' in terms of pitch/roll efficiency? And, for that matter, what is the definition of efficient in this context? Does that mean energy spent by the motor/translating in the movement?

For my 'rough guess numbers' I am seeing the pitch efficiency at ~90% and roll at ~83%. I'll of course have more accurate numbers when I redesign the seat.

Ok

I've reworked my design a bit. Made the base bigger, moving rod mount/motor position forward a bit, as wellas shortening the post the chair sits on. I think I am pretty happy with this design & the results I am seeing in SimCalc.

I did have one other question, though- when I was working with SimCalc, I noticed that as I increased the motor angle, roll efficiency increased 5-7% per 5 degrees.

SimCalc defaults to a 10 degree motor angle for the pictured build, but I haven't noticed many builds that pitch their motors this way. I am wondering if there's a reason most people seem to have their motors set at 0 degrees? Maybe I just haven't seen enough builds.

This is what I am referencing: