Awesome; Thanks a lot, that all makes good sense. From the profile sharing point alone, I will definitely go with a 4 actuator setup (Although I still may consider leaving a 3 mounting point option available for flight & additional testing later on)SimFeedback does support a 3 actuator setup.I implemented it as a budget option.
Fun fact, I had a 3 actuator setup in the beginning while waiting for my 4th to finish printing.
It felt ok, you will get all effects and some axis will have slightly more range.
The three points will stabilize by itself.
That will prevent any lifting of the ground.
And I would recommend this setup for a flight sim platform.
There are also some drawbacks.
You need to balance the COG in the center of all 3. In our setups that will bring actuators very close together because the width will determine the max distance.
One actuator has to take the double load of the other two.
This is not a big problem with our very strong servos but it was in my older DC TriMotion setup.
The main reason we do all use a 4 actuator setups is that is feels more connected.
Yes I know this is not a scientific argument and I can only speculate why it feels different.
I think the position of the actuator is responsible for this and some slightly out of sync movements (with respect to the other actuators) will give you a different sensation.
The axis of rotation is in the middle between two actuators. If you look at the wheelbase of a car in relation to the driver you will likely want your rotation axis right in front of your seat.
This is not simple to achieve with a 3 actuator setup.
And last but not least, our actuator can shake/rumble. Having 4 doing this at all 4 corners is better.
We do all use the 4 actuator setup, this makes profile sharing easy, even we do not have the exact same setups.
With a 3 actuator setup you will need to do some modifications by yourself.
It is a great way if you are on a tight budget and you can upgrade any time later.
I cannot thank you enough for all you’ve done for the simulator community.