"   Hello friends, what is this part? looks very similar to the original and costs 89.90 dollars             ciao Klaus "

"100 % agreed. I have 2 APM 2.5 boards and if I decide to order more, for sure I'll stay with 3DR."

"Exactly. I was shocked by the same brand name."

"just be careful, The saving you make here could cost you your UAV, my first attempt with UAV's was with a HK AIO-Pro, their first board had some serious issues, it failed mid flight, and cost me the whole UAV.  I now only use 3DR Ardupilot…"

"Hi All, According to the Open Source requirements, I belive that HK is not allowed to advertise this clone as a true "ArduPilot Mega" which is a trademark of 3DR. Regards, TCIII Admin"

"Why not, that product discussion thread in HK is interesting. (I ordered one, I have expensive PX4 and APM1.0 and lost Legacy one) I have bought things from 3dr and diydrones and China, usually ok, some headers missing (3dr) or something but mainly…"

"I agree with Jay. Hobbyking are great for their cheap prices, and if you're flying around a park you can risk the occasional malfunctioning servo. I'm not sure I would fly a UAV out of sight trusting Hobbyking's quality control to…"

"A cheap chinese knock off improperly billed as the real thing... from hobbyking.  Color me shocked.   I can't imagine why I would want to introduce yet another variable into building a drone, namely, component quality and the…"

"Anyone have any more experience with this GPS?  I crashed today and broke my 3DR uBlox GPS....love to buy another one, but with all the other broken parts, I need to save where I can...so anyway, is this GPS from HobbyKing plug-and-play with…"

"Hi Iman, Did you have success with it?  I purchased one of those recently.  I used the 3DR config file with it and it appeared to work fine. I've been trying to get working tonight with my APM 2.5.  However, when I connect with…"

"I an currently ging thru this with my ublox module.  I had no signs of life, out of the box with mine.  After ordering replacment cable(s) and attemping to flash the firmware I contacted 3DR and sent it back with a supplied ground Fedex…"

"Thanks Paul for reply In fact I need some of the gains to be switched by a switch on my transmitter just in case some thing goes wrong to be able to switch it back quickly. Do you think it's gonna be changed in APM onboard in a short time if I…"

"Why don't you have your second set of gains saved in a parameters file. While flying you can got to the configuration=>advanced parameters where there is an option to compare parameters with a file and change the those that are different to…"

"Thanks Kevin for suggestion Actually,  I am looking for some if...else loop in the code. I want to change the flight conditions in the air (any type of injected fault) and then switch to new set of gains, which are tuned in…"

"You can do it over telemetry.  APM has some of the support needed to handle the mavlink MAV_CMD_DO_SET_PARAMETER but I don't think anyone has implemented it.  If that was implemented you could put set param commands into your…"