"How does it yaw?"

"Efficient or not, it definitely lacks the mechanical simplicity of a traditional brushless direct drive prop. Which means it's going to be heavier, less sturdy and more expensive. "

"Very nice! Although it's obvious that the cup was empty. Either that or you have a really good and responsive alt hold :-)"

"I've experimented with XR5 (pretty much the same deal as XR9, except at 5 GHz so it can be used in Europe) and Wiligear's WBD-111 micro routerboard. AFAIK still the smallest and lightest board on the market at 9x8x2 cm³ and 70 grams…"

"That was the sound of true happiness. Congrats :-)"

"I'm flying power rails, the advantage is that you can have a current+voltage sensor on it. This one is for a hexacopter and either one or two batteries (in parallel). "

"Hi Brad, Thanks for the update, I've updated the UKHAS Wiki with your information. Generally people doing HAB launches anyway are using the uBLOX 6 now due to the performance, power etc. In fact I'm half considering doing a custom…"

"Anthony- This is even later, but I just wanted to add a quick comment about the Venus 634FLPx.  I've personally flown this unit to 63k feet and can verify that it worked without problems.  This is a version of the board that Sparkfun…"

"Hi there, Appreciate I'm a bit late to the party but for anyone looking for high altitude GPS modules current information is as follows. Currently there are four GPS modules known to work at high altitudes ( >18km) they use an AND statement…"

"Assuming your power grid will be able to feed them all at once (what is that, 40 A each?), then yes, you multiply by 4 :-)"

"I've been testing 802.11a modules by UBNT (XR5). Live HD from the air is not nearly as impossible as people think."

"Ah, remote activation, even better. All OK then!"

"Wouldn't it be safer to switch steps #6 and #7 in the field checklist?"

"What are the batteries' C ratings? Assuming they're roughly the same, the larger battery will be able to feed the motors more power. The smaller battery could be the limiting factor.   Also, Turnigy SK motors are to be avoided.…"

"It might be acting like that because the open signal wire is picking up noise. Try pulling the ESC signal line low (grounding it) with a 4k7 resistor. That should take care of the noise without affecting normal communication. My Turnigy Plush, when…"