Antenna ID

[1524J]

1 hour ago, Hank said:

You do realize that the StormScope shows live data, just a second old,while XM and ADSB weather data can be 20 minutes older than the time shown on the screen, right? It wasn't the StormScope that caught you. A lot can happen to a maturing thunderstorm in twenty minutes!

My C has a slaved compass way over at the left end of the panel, and the unit that drives it is in the tailcone, not the wing. But I'm sure much changed between my 1970 plane and your 1978 model. Besides, no have HSI, neither.

I was a new pilot in a PA140 without either when I learned how fast weather could form in the Texas summers.  My understanding is XM weather is updated at a minimum of five minutes while the ADSB takes longer. I think NEXRAD moving map gives a very clear overall picture of storm fronts and direction. The combination of the two is probably the best use of equipment and information although I try to stay well clear of storms.

[Hank]

1 minute ago, 1524J said:

I was a new pilot in a PA140 without either when I learned how fast weather could form in the Texas summers.  My understanding is XM weather is updated at a minimum of five minutes while the ADSB takes longer. I think NEXRAD moving map gives a very clear overall picture of storm fronts and direction. The combination of the two is probably the best use of equipment and information although I try to stay well clear of storms.

The XM weather is updated every five minutes. But it takes time to process and stitch together. So the "new," freshly updated XM weather can be 20 minutes old. Not good when you are near anything active . . . The StormScope shows what is happening RIGHT NOW.

[1524J]

7 hours ago, jetdriven said:

Yup, Stormscope data is valuable,   Relying on ADSB while in clouds in foolhardy, while XM is plain suicide.

you gonna navigate this with 20 minute old data?

Well I'll just cancel my subscription.....  In all seriousness....I've used XM for several years and wouldn't consider leaving home w/out it. It would appear your using some type of weather to get a NEXRAD display Byron. I'm not discounting the stormscope although I should probably pay more attention to it if the weather dictates. In my experience XM gives a better overall picture and I don't think it's anywhere close to 20 minute old information. Can't comment on ADSB as I've never used it although I did just purchase a Stratus receiver.

[jetdriven]

I used both, but maintained visual at all times. Just as I guessed (and bet on) it would blow up all to hell just after i got through it.  But the stuff was way more serious looking than the ADSB (garmin pilot) showed it, the sotrmscope got completely overwhelmed too. But at least it showed striked in the few seconds after it was cleared.

[1524J]

2 minutes ago, Hank said:

The XM weather is updated every five minutes. But it takes time to process and stitch together. So the "new," freshly updated XM weather can be 20 minutes old. Not good when you are near anything active . . . The StormScope shows what is happening RIGHT NOW.

I've flown using the XM and visually verified what I'm seeing out the window of the plane is what's showing on the radar.  I'm not doubting what your saying, it's just not what I've experienced. I've been 30 miles from my home airport watching a storm cell sitting right over the top of KBWD, listening to ATIS and landed at an alternate waiting for the cell to clear. It just what I've experienced. But.....After this thread I'm going to make sure the stormscope is fired up and working and will be more diligent in paying attention to it as well as my 796. I do appreciate the comments and advice!

[jetdriven]

What does the XM show when the line is moving at 60 MPH ??

[1524J]

35 minutes ago, jetdriven said:

What does the XM show when the line is moving at 60 MPH ??

That's exactly why I like it.....moving map. I know direction and have an idea of the speed so I can stay behind the line. I feel like I'm trying to argue XM or stormscope when a combination of both is best. I'll admit I've relied more on the XM for reasons I've given....but I'm here to learn. You and Hank have both given me imformation that I need to pay attention too and will.

Just out of curiosity Byron, have you ever used XM?

[1524J]

Good article using available resources....

http://webcache.googleusercontent.com/search?q=cache:aSvbHMF0jMoJ:airfactsjournal.com/2013/09/thunderstorm-flying-in-the-age-of-datalink-weather/+&cd=2&hl=en&ct=clnk&gl=us

[carusoam]

There is a thread around here detailing the delay of the data that is delivered, and how the time stamp on it looks really fresh, but the data really isn't.

Compare what you get from XM and ADSB to some web based graphics while at home.  Multiple arrows depicting storm cell speeds. Click on the arrow for hail size, cloud tops, speed and direction of the cell.

 Imbedded (visually hidden in clouds) storms are typical to the north east.  It makes it a bigger challenge to get used to your onboard equipment, and calibrate your eyes with what you are seeing.

Having storms erupt around you like Byron is showing, Have Plan A, B & C ready to execute...

Doing it without both forms of hardware, is too old school for me.

Best regards,

-a-

[1524J]

I found the thread you referred to Anthony. It was a good read. Especially the link to the article by Scott Dennstaedt. It appears that most have drawn their own conclusions. After reading Scotts article I think I'll stick with XM while trying out ADSB. And make better usage of the stormscope. 

https://www.avwxworkshops.com/forum/read.php?8,550

[Guitarmaster]

While we're on the subject....anyone want to venture a guess as to what this controls? Even my avionics guy wouldn't speculate. It has no markings at all, at least on the outside. I suspect some type of gyro, but it doesn't spin up when the master or radio switches are on.

 

It's one of the government mind-control devices. The predecessor to chemtrails.