Posted by ScottAllyn |
Nov 15, 2016 @ 06:56 AM | 2,324 Views
I was looking for my little motor and prop testing post earlier today so that I could update it and ended up digging through a number of pages before actually finding it. I figured I'd copy the data here to this little RCGroups Blog section so that I don't have to keep digging and if anyone else finds the information useful, they can find it more easily here, too!
I'm treating this as a live document and I'll post a reply to the thread when I've made significant updates.
These tests are not scientific and the setup is pretty crude, but I think the results are useful. Decide for yourself and lemme know what you think. Just don't be mean; I'm a delicate flower!
The fixture pictured above is what I'm currently using for these tests; it's permanently mounted to that scale. The scale measures grams with a resolution of 0.01g. I've found it to be accurate and repeatable down to ~0.02g. I was initially concerned that having the motor cantilevered out from the center of the scale like that might throw off the readings, but I've placed various calibrated weights on the motor mount, ranging from 0.02g all the way up to 65g and the reported numbers were spot on. The 100g weight helps dampen the fixture and stabilize the readings. The motors and props are oriented upside down so that the direction of thrust pushes the motor down into the scale. This allows the prop wash to go into free space and prevents it from hitting the scale (or getting recycled
Posted by ScottAllyn |
Oct 14, 2016 @ 07:25 AM | 5,191 Views
Some people who have dropped a BeeBrain Flight Controller into their Inductrix frame have been disappointed with the results due to how different it feels from the original Inductrix flight controller. This got me curious to see if I could re-tune the BeeBrain to behave more like the original flight controller (mostly by fiddling with the rates and expo). Below are the settings that I've come up with.
My goal with these settings is not so much to match the flight behavior of the original controller exactly; I just want to get it within the same ballpark. To get it to be an exact match would require waaaaaay too much switching back 'n forth between flight controllers; I'd rather spend that time smashing my Inductrix into the walls zooming my Inductrix around the living room! People who are new to flying more advanced quads (or those who just prefer the feel of the original Inductrix) might find these settings useful as a starting point.
Unfortunately, I haven't found any way to do this entirely within Betaflight since the Inductrix flight controller has a bit of throttle mixed in with both pitch and roll, something that I don't think can be done in Betaflight. Most decent radios (and even some budget radios) have Mixer settings, however, so the throttle mix can easily be handled on the radio side.
Please use that url if you link this data anywhere else. You can also now link the individual posts for 6mm, 7mm, and 8.5mm motor data!
Editing this one large post was becoming a headache and it was only going to get worse as I added more data. I'll close or delete this older thread if I can figure out how to get the replies moved over to the new one, since I'd hate to lose all of the existing posts.