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Skydemon has just changed its software within iPads so that track steering data is exported via bluetooth for AP use. I have a dongle to receive the blutooth data and output it as serial but both the serial connections (pins 1 & 2) on my HS34 are in use by GPS inputs. Is it possible to use any...

RV-8 with D180/AP74/HS34 and heated pitot. I often get a brief STALL/STALL call out just as the aircraft is touching down in a near 3-point attitude. But recently that call out and the flashing red triangle on the AOA display often (but not always) stay on after landing, all the way through...

Whilst doing the calibration of the D-180 (see my other post), after maybe 20 minutes the IAS changed from zero to 22 kts and hunted about slightly. The ASI still read zero. Cannot fathom why this might be. Any clues please?

Set up my trim calibration today. Both elevator and aileron trim set up as per manual using GP1 and 2 - with the numbers changing as the trims were run to ends and center so the connections are good. However when I display the EFIS screen, I expected to see both elevator and aileron trim as...

About to move the RV-8 to the field for wing fit. Powered up today in the workshop and the altitude says 30,000ft, IAS 380kts and OAT -48! It was normal last week! Any offers for a place to start fault finding? John

Hi Folks, RV-8 with D-180 +HS34 +AP74 with 2 servos connected and powered. No other avionics fitted yet. Still building the avionics. Have updated the D-180 and AP-74 without problem to V5.5.0 but unable to update HS-34. After start D-180 shows red network configuration error message which...

Adding a GD40 carbon monoxide detector to my D180 &HS34 panel. The GPS is connected to the HS34. What is the best connection for the RS232 from/to the GD40 please? There seems to be options through the EMS and EFIS connectors. John

For our RV-8 under construction we bought a D-180 with 2 servos and an AP34.  Having now read the product documentation, studied the configuration and discussed options with tech support we realised we needed an AP74 to achieve the AP functionality we wanted (just like an Airbus please).  We...

I just drilled the aileron bellcrank to #11 to take the AN3H-17A bolt that attaches the servo arm.  But the 1 7/8 inch bolt won't go in the hole because the other leg of the bellcrank that supports the aileron pushrod gets in the way. I am not keen on making the hole oversize or oval to...