New Transponder from Dynon

[rivetshaver]

Which unit should I buy?
My first impression is that this will work great. I am building a 9A, Is the lower priced transponder suitable for the 9A? The 9 does not go faster than 175 knots and I doubt if I will ever fly over 15,000 feet.
Opinions?
Thanks
Greg

[evmeg]

I like it! My question is when the com will be available? For most of us this will complete the suite. It sure will leave me a lot of free panel space
cheers..
Evan
evansaviationproducts.com

[dynonsupport]

Greg,
You can legally put the class 2 in your 9A as long as you don't fly above 15,000 feet. But if you do put one in, you need to make 15K ft an operating limitation of your plane.

[vlittle]

OK, time to capitulate. Just send Dynon all of your money for your panel! Eliminating the transponder from the panel leaves more room for a second EFIS. Very clever. Now, about that comm... (sound of cracking whip).

Actually, I'm a bit concerned about the god-box problem. Should a failure occur, everything quits! Independent systems have their value by isolating failures. I'd like to see the tech specs on the transponder to determine the failure modes should the EFIS and/or SV network fail.

When can we expect the specs?

V

[dynonsupport]

Not sure what specs you want.

The transponder is an RS-232 serial device. SkyView supports redundancy with serial ports, so if you have two or more SkyView screens, only one needs to be working for the transponder to work. Yes, this sounds odd, but SkyView has the ability to have two RS-232 TX ports hooked together.

Most people already use a Dynon EFIS for the altitude encoder with a standalone transponder, so it's already very tied to the Dynon EFIS units already.

By certification requirements, the transponder will stop transmitting with 2 seconds of losing the serial feed. So it does absolutely require a SkyView to be working for the transponder to work.

The whole setup works for the G1000, and they lock up a lot more often than SkyView

[vlittle]

Originally Posted by dynonsupport

Not sure what specs you want.

...Yes, this sounds odd, but SkyView has the ability to have two RS-232 TX ports hooked together.

The whole setup works for the G1000, and they lock up a lot more often than SkyView

The specs sure would be nice to see the serial port wiring to the SV units and the WAAS GPS connection. If it depends on the SV wire-or'ing RS-232 TX lines together (with a proprietary tri-state system), then that's still a problem for single-point failure compared to redundant serial inputs.

Most of the questions will be answered when an interface spec is published.

V

p.s. Nice counterpunch by Dynon against Garmin in the EFIS wars.

[Garage Guy]

Originally Posted by dynonsupport

The whole setup works for the G1000, and they lock up a lot more often than SkyView

Now that is a provocative statement.

Do you have actual data on this? What is the average number of lockups per 100 hours for the G1000 and for the Skyview?

--Paul

[dynonsupport]

When using two Skyviews, only one serial port is used on the transponder module. The SkyViews tri-state.

A TSO-C146A GPS hooks via serial right to the transponder. If you aren't using a certified WAAS GPS, there is no need for this.

We don't currently have plans to publish the RS-232 comms spec.

I was only kidding around about the G1000, and didn't mean to start anything. I have heard of G1000's locking up in flight before (and you can too, just google it), but we have yet to hear of this happening even once with a SkyView. Doesn't mean it hasn't happened or never will. The main point here is that the transponder controlled by a PFD is far from a new idea, it's something the G1000 has done for years, and the G1000 is far from perfect and bug free.

[E. D. Eliot]

Hope that the great folks at Van's will become aware of this and will offer the SKYVIEW and this new Dynon equipment for the RV-12.

I think that this upgrade of the RV-12 panel will sell like - well, you know what I mean! Can you imagine the RV-12 with two SKYVIEWS and this transponder. I'll happily pay for that.

[KRviator]

I'd gladly pay for the ability to have nothing more than two SkyView screens in my yet-to-be-started 9A.

The transponder that Dynon's released, coupled with the entire SkyView concept and layout, has all but ensured any RV that I build will be Dynon-equipped, but the ability to have nothing but the two 10" screens certainly adds to the "coolness" factor.

The alternative is a trio of G3X screens, with a G430, and GTX327......