Skyview + Vertical Power Wiring for Vans RV6

[rvflyer]

Hi,
I'm at the wiring stage with the intention of installing 2*Skyview screens and the Vx Sport unit;

I have studied both Dynon & Vx docs and have a couple of questions.


1) Startup

I'd like to have an immediate oil pressure indication/warning at engine startup (as any aircraft does);

Should the Skyview be non-switched through the Vx in order that it is displaying oil pressure?

Normal practice though, is to have Avionics etc off at startup to avoid spikes from the starter contactor (spike protection diodes can of course fail).

If it is safer (even with the Vx) to have the Dynon off, then the following annunciators make good sense:

i)  Low oil pressure
ii) Low volts - I'm using the B&C LR3C-14 regulator unit - it has a pin for this function.
iii) Starter warning

Do you agree/disagree - why?


My fundamental here, is can Skyview withstand the rigours of the Starter circuit constantly producing large back-emfs that easily ruin avionics?

2) EMS220 fault wire.

Would this also be a good candidate for attaching to an annuciator lamp, is it 'on' only during a fault or when the engine is stopped also?

Does the ADAHRS/Transponder/GPS also have seperate fault indication capability?


3) The Transponder

This has it's own seperate power lines, should this be switched seperately (via the Vx)? If initially powered off at engine start the battery is having to work less hard.

Does the Skyview acknowledge it's existence when powered on subsequently? What mode is it in at power on - Standby? what is it's default startup code? For mode 'S', where/when do you key in the unique address?


4) Final question
Has anyone fitted Skyview to an Rv6? The main question is about how they ran AOA/Pitot from
behind the baggage wall forward to the panel. How did you get through the rear and then front spar sections?

Assuming that you had electric trim, flap motor, flap position, ADAHRS and possibly Strobe power lines to get through.
These will not fit through one 5/8 hole!

Let me know if any of the above requires further clarification.

Grateful for any advice.

Thanks.

 

[mmarien]

I believe Dynon states that the SV is robust enough to be on during engine start. I have mine on during start. What you might want to do is have the SV-BAT-320 backup battery so that the SV will stay on if the starter draws the voltage too low. On my system, SV reboots on engine start if I don't have the backup battery connected. With VP-X, SV is powered with pin J12-9 (always on) so it comes on with the master switch.

While it's good practice to install the diodes, I believe the SV itself (as most modern avionics) are protected from voltage spikes. Install the diodes and you're doubly protected.

The EMS warning light is not really a fault light. It's on anytime there is an alarm which is set for the individual widgets. So the warning light is on for low oil when the engine isn't running if the oil pressure widget has the alarm set to ON or LATCHING.

I don't have the Dynon xponder, but SV recognizes both my GTX327 transponder and ZAON XRX when I turn them on after the SV (via the avionics switch). It a good reminder to turn on the ZAON when it has a red X through the traffic symbol on the map page. Actually I had ZAON modify my unit so that it comes on with the avionics switch so that won't be a problem anymore.

Can't help with the RV6 question but hope the rest helps.

 

[dynonsupport]

SkyView is absolutely designed to be on while the engine is started. We test ourselves to the certified standard, which is DO-160, for 28V planes, so we survive 60+ volt spikes.

When you crank the engine, you may find your electrical system goes below 6V. In this case, SkyView will shut off of you don't have the backup battery. If your voltage goes below 10V but still above 6V, and you have no battery, SkyView dims the screen to lower the load on your battery while cranking, and comes back right away when you release the starter.

You can choose to put the transponder on it's own switch or just turn it on with the master. It only draws a few mA when in standby, and only 350mA when transmitting. SkyView will find it whenever you turn it on.

The transponder will be in standby until SkyView boots, and then will be in whatever mode you left it in when you turned SkyView off last.

As a small GA plane, you do not enter a unique ID into a Mode-S transponder. You just enter the standard 4 digit code given by ATC, or use 1200 when VFR (or whatever number for your country). It's only the transport planes that enter their flight ID (like UA623). Because of this, we don't support any place to enter the flight ID.