Hey everyone
I am thinking about making a multicopter with propellers size around 50-60” but on the “setting up the aircraft charts” page it only goes up to 40”.
The MOT_THST_EXPO etc they only go up to 40”
Please help?
I’m curious about the answer to this too. I can say that I’ve not had a lot of success using the “guess the PIDs based on prop size” method.
Yes, absolutely it can. But I highly recommend you seek professional configuration and tuning help.
@amilcarlucas provides this service or can point you in the right direction if he is otherwise busy.
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There’s no need for MOT_THST_EXPO to go higher that about 0.8 and you reach that value at around 36inch props. Larger sized props make other small differences to the initial parameters.
The best thing to do is use the AMC , it includes all the calculations. I would only attempt using such large props if you already have extensive experience with large props.
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Thanks everyone for there thoughts
I was planning on using the hobbywing 13X motors in a quad x configuration 56” fold props, 18S lipo, unsure of the full weight at this stage but quite large/heavy with the payload.
Yes have made a few large copters with success around 32” props before.
Planning on using the Cube orange FC with Here3+ gps.
Never actually used the Methodic configurator guide, how does it work and how to enable it when setting up a quad? shortcut code?
There are no shortcuts. If you are going to do this on your own, recommend building a smaller craft or repurposing an existing, smaller build to use in familiarizing yourself with the AMC toolset and process before configuring the large one.
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Have built quite a few copters it’s just the charts don’t go over 40” props or do I just use the 40” values as a starting point?
When I said shortcuts I was meaning the key board short cut to enable the window 
Ah, ok. No, AMC is separate software. And my advice stands - use one of your older builds to familiarize yourself with it and then proceed with the larger build. It’ll be a few hours well spent, even if you don’t prefer to use the software in the end. The method is very well thought out and presented logically. Once familiar, you can apply it with or without the accompanying software. Also, AMC will extrapolate the charts you keep referencing.
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At our company we can measure props, motors and ESCs. The entire powertrain can be characterized and the correct MOT_THST_EXPO value found.
We have an high altitude chamber and climate chambers. We can simulate all sorts of weather.
We can also advise in construction and tuning.
There are AMC YouTube videos explaining it, and an ArduPilot conference 2025 video
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