Can you measure the distance from the point where the back arm attaches to the bat frame to where the side arm attaches to the bat frame. Then measure the distance between where the two front arms attach to the bat frame. I can work out the rest.
FM IF you find a good prop. please share because out of the 200+ I have bought in the last 21 months NOT ONE has been what it should. I don't care how much it cost or who makes it!!!!! Not a single one was balanced and if it is more than a buck or 2 IT had BETTER be BALANCED in my book. By the way I am using HK Turnigy (Gemfan) props where I can but still each one os out of balance BADLY when received!
Looking at the video several times It seems like everyone uses the lasertoy (even with gopro as FlyingMonkey mentionned, thanks man!) except David on his tri-quad, where he seems to have some kind of tiger motors, I guess it might be 2216-12's.
Those seems to be a lot more efficient (and a lot more expensive although it'd be nice to list the option I guess - personally I am curious!
replying to myself, after looking up some more data on the 2712-12 24g (lasertoys and others) it seems at 3S/8x4.5 it has about 500gr of thrust at 100% throttle (thats 1.5Kg total for 3 motors). it also correlate lasertoy's data in fact.
Given my similar tri 2.5 is about 1.1Kg (GP3, 3300mah 3S, DT750), I would estimate the bat bones is about 900gr to 1kg with the same equipment but much lighter motors. Thats about 1.6x thrust ratio at 900gr.
That's more than enough to fly however, flight will probably be around the upper side of the throttle range, which is probably why someone (from flitetest i think) said somewhere they liked the park300 for the additional power as well, despite the more brittle construction.
Now, my DT750 have about 950gr of thrust with 10x4.7 props... which is fine when I'm flying but sometimes I feel like I could have yet a little more power. Thats 2.59x thrust ratio.
So yeah. For any sport flying *with* some load on the frame, I don't think the 2712-12 24g cut it. They'll fly but that's that. They're going to be fine for mildy sporty flying without the additional FPV loading and with the 2200mah 3S tho - no question about that (and thats the recommended flitetest setup)