I've just finished the build and will begin early full up integration testing in the next day or so on NTNS-2. This is a highly modified Stinger 64 with APM2. There are really 2 airframes. One is for flight testing, gain tuning, learning a little about APM2. I have to admit that there have been several issues. The two that i know that I have are the flash card slot being a bit less than tight, perhaps some formatting issues -and- the stock GPS lock issue. For my installation this doesn't seem to bother time to 1st fix, but I am loosing lock in flight, dropping satellites. I am NOT using a downlink, have the jumper removed, and power is being applied to the input and output sides with a Castle BEC Pro set at 5.05V. SW version is 2.40. Of course no red wire from the ESC. The GPS is somewhat masked by some wires and the EDF mtr wires run just behind APM down to the fan. It's not ideal for EMI.
Not to worry since this isn't the objective configuration and I just "score" APM when it has lock and the altitude is reasonable. My 100 mph Stinger flight test bird:
Here's a picture from the Stinger HAB build. It's pretty tight inside the bay:
Some of the BOM:
2-Castle BEC Pros (5.3 and 12V)
3-Omega Kapton heaters
1-external relay + helpful external LED
3-Airtronics 94761 servos for flight control
1-analog servo for the sailplane towhook release
Venus GPS/regulator/logic level converter
ReplayHD 1080p (heated) and externally powered
4s 5000 mAh battery
airspeed probe and pressure sensor
voltage and current sensor
Airtronics 10ch rcvr, Airtronics SD-10g TX
Very much modified Stinger 64 airframe (the only inexpensive component)
I'm about 1/2 # lighter than NTNS-1; 1200g Kaymont
Total weight is 3# 2oz vs. the flight test bird at 2# (identical XCG and flight control setups)
Ballast is 2.3oz in the forward bay.
Testing, SW version catch up/merges, HIL testing with FlightGear/X-Planes, Temperature testing with APM1, duration testing, log testing...camera testing.... to follow.