"I have just received my nice new APM boards from udrones (Mexico) which arrived on fri, afternoon (Cyprus), which was great as I didn't order them until Tues. afternoon, Ditto a small cable from DIY drones. Thanks guys that is what I call…"

"I.S.  on 3. Is it reducible to a neat equation? This I suspect is a matter of debate. For 20 years, I've seen only two schools of thought on these kinds of problems: neatly reduced curve fitting, and lookup tables based on testing. All the…"

"bGatti: good job on the explanation! It's perhaps the most misunderstood part of IMUs. The only thing I'd add is the GPS only gives meaningful heading information when in motion, so for things that hover or can remain stationary, such as…"

"@bGatti Thanks for your explanation. at point 3 you mean: ac= v^2/R = Rxw^2 right? or some other equivalent equation? at point 5 you mean use the GPS to obtain bearing? Anyway I knew about the "large" MEMS drifting, I just asked myself how…"

"@I.S Perhaps no topic has been more discussed to less effect here and elsewhere :) I'll have a go - but it's tricky:   1. Silicon gyros are crap. Compared to aircraft grade gyros which allow the Space Shuttle to orbit the earth a…"

"Could you please explain further (or redirect somewhere) about this chip not having centripetal correction?   On the other hand how good is this chip compared to stand alone gyros and accels? (in terms of vibration rejection, accuracy,...)"

"@bcr, One reason is to offload the engineering. If Ivensense can output rational values - that's be great. Chris's point is interesting; I guess that solid state gyros are so unstable compared to the models used in current airplanes that…"

"It's nice to combine the gyro + accel, but with modern MCUs I hardly see a need to offload the math. You can run a super-naive C floating point of DCM with like 5% of a $3 STM32."

"Yes, we discussed this last year when it was announced. It is not available now and won't be until mid-year. We've been working closely with Invensense and will be the first autopilot to use this chip. But using the built-in sensor fusion…"

"We are just waiting for the SPI version to release the APM v2.0 around Q3-4"

"This owns.  I must admit I've been eagerly waiting for it, and not-so-eagerly awaiting a stupidly overpriced sparkfun breakout board :P   Does the motion processing have filters running ?"

"@Thomas how about the ubiquitous HMC5843? @Doug I am impressed how much ArduPilot team is involved in the industry!"

"That link is just for a pre-order....  InvenSense got a little ahead of themselves when they announced this a few months ago.   Ryan Beall and I have been working with Patrick Henry from InvenSense to get some good hooks built into the…"

"It will be interesting to see how well the fusion stuff works, hopefully someone will do some sophisticated benchmarks before I get the hardware finished! Now I need to find a decent cheapo magnetometer which hooks up easily with the IMU-6000 -…"

"This nice SoC was announced some time ago, but looks like it's finally on the market. A bit pricey on Farnell (even compared to its MSRP) but no doubt the chip count and board area saving are huge.   I would like to see an APM+Oilpan…"