Glass & Spins

[WA85]

Can't say for sure, but the video you refer to is possibly from spin training I did with CE Cavegnaro in my RV-8. Before anybody gets upset about the Dynon Skyview ADAHRS "tumbling", please go read their excellent Pilot's User Guide, Chapter 4, which states; Attitude Rate Limit - Skyview's ADAHRS will operate normally at rotational rates of up to 150 degrees per second in any axis. If the aircraft's rotational rate exceeds 150 degrees per second, as can happen in a well-developed spin or when performing aggressive aerobatic maneuvers, the PFD page will annunciate "ATTITUDE RECOVERYING".......
The Dynon ADAHRS performance in my RV-8 during spins is considered normal ops for the SKyview and not a safety issue (at least for my installation in my aircraft). I perform spins by looking outside the aircraft for situational awareness, not inside at the SKyview. I have done numerous loops and rolls and the Skyview ADAHRS performs perfectly.....unless I exceed 150 degrees of rate change per second. Go look at a typical gyro driven AI and see what is looks like after a well developed spin / recovery and if comes back to life in 2-3 seconds.

[Robert Anglin]

Originally Posted by Ethanol1

So if you're flying IFR with glass and you get into an upset condition what do you do?

Push the blue button. Sorry could not resist. Yours, R.E.A. III #80888

[ChiefPilot]

Originally Posted by WA85

Before anybody gets upset about the Dynon Skyview ADAHRS "tumbling", please go read their excellent Pilot's User Guide, Chapter 4, which states; Attitude Rate Limit - Skyview's ADAHRS will operate normally at rotational rates of up to 150 degrees per second in any axis.

Dynon's ADAHRS does operate within it's spec; I don't think anyone has said otherwise. I contend that it's not a bad spec, either - just that Garmin spec or actual performance is likely better.

Also, mechanical gyros tumble too.

[HSANTIBANEZ]

Originally Posted by bobmarkert

I have the Garmin G3X. I spun my -8 quite a bit. I've never seen any precession at all. In this video you can barely make out the screen and it is indicating the correct attitude. The motor quit but the attitude was still good

https://m.youtube.com/watch?v=W4BH2tp_e2Q

Dear Bob can you tell me why the engine stops? is carburated? Fuel pump was on?

Best Regards

[cajunwings]

FWIW: Saw Sean Tucker at his operation last year and noticed both of the biplanes had Dynon D-10s installed. Since I had one I asked how they were holding up and if they ever "tumbled". He said they were totally reliable and he had never noticed any attitude errors no matter what he did in flight.

Don Broussard
RV 9 Rebuild in Progress
57 Pacer

[Bill Boyd]

Originally Posted by Gash

My grandfather was a B-25 pilot in WWII. He told me a story about the whiskey and duck method! Funny that you should bring this up!

...that a liquid surface (or suspended dice from the rearview mirror) will provide attitude reference in any type of accelerated flight. It just ain't so, else we could rely on our inner ear or seat of the pants to do the same, and we would not be able to pour milk at the top of a loop.

I'm sure it's possible, perhaps safest, to spin down through an undercast and recover once clear, if no standby instruments are available. But your whiskey bottle will NOT be showing you a reliable horizon during that maneuver. Not even close.

[Gash]

It's a joke Bill. It was funny back then, and it's still funny now. Nobody is really serious about it.

He also used to tell stories about being over the ocean, half way between Okinawa and the Japanese mainland. Mandatory total radio silence. Then some young guy in the formation would radio: "Who dat?" Then another guy would reply: "Who dat say who dat?" Then another: "Who dat say who dat say who dat?" Finally the old man would get on the radio and yell "Everybody shut the **** up!"

...And an hour later it would start all over again.

Pilot humor. Gotta love it.

[billdianne]

My duck wont fly with me since the last time I threw him out.

[Ethanol1]

I was out interviewing ducks.

[RV7ator]

Or a couple of geese and form up with them.

Besides tumbling EFIS, navigators, like my GTN650, loose lock with the satellites if you roll or pull hard enough to blank out the antenna's view. Knocks out ADS-B since it's the WAAS source, and a sure-fire way to fail your $500 rebate ride.

John Siebold
"No drinking on final."