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pequeajim

Joined: 03 Sep 2006
Posts: 708
Location: New Holland, PA

Posted: Mon May 28, 2007 5:51 am Post subject: EFIS

I am working on my panel design at this point and am trying to decide on a EFIS.  The Dynon is inexpensive and the company seems to have the right mentality as far as software updates.  I do remember reading on this list that some people were not happy with the sluggish updates on the screen?  In looking at GRT, they are quite expensive for what they provide.  I also came across a company Advanced Flight Systems.  They have a EFIS/Combo display that looks good.  Have any of you had any experience with them?  

Jim!     [quote][b]

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N1BZRich(at)AOL.COM
Guest

Posted: Mon May 28, 2007 8:02 pm Post subject: EFIS

Jim,

     I have two GRTs in my airplane, so I am biased, but  I have flown two airplanes with the Dynon - one was the small version  and the other was the large EFIS.  I have about ten hours behind the large  screen EFIS, as it is in the Zenith Zodiac XL that our EAA chapter built and I  put the first ten hours on that airplane.  Having said that, the large  screen Dynon does not seem sluggish in the air as the smaller one  did.  So that is a good thing.  (Note, none of the four or so  airplanes I have flown with the GRTs have ever seemed sluggish.)    

     Here is a run down on my thoughts on the two:

 -The two Dynons that I flew behind do not seem to have near the bright  colors (and not as many colors) that I see on the GRTs.  

 -The GRTs don't seem to fade in bright sun near as much as the Dynon.   

 -When looking cross cockpit, it is easy to see the GRT, not so the Dynon -  it is kind of faded.  However, one person that flew in my airplane had a  hard time seeing the screens.  We later found out he had strong UV  sunglasses.  Did that make a difference?  I don't know, but of the 75  plus people that I have flown in 31BZ, he is the only one that said he had a  hard time seeing the GRT displays.

 -The Dynon does not have near the "fun things" that my GRTs do - built  in GPS, constant wind information hi-way in the sky steering to a synthetic  approach (that one is super), terrain and tower warning, color coded terrain  map, density altitude, G meter, OAT, TAS, ground speed, it talks to the auto  pilot for steering to a way point, etc. etc.  The ability to display all  engine numbers graphically.  The ability to split screen with flight  instruments and several different map modes or engine numbers.  Etc.  etc.

 -For an extra $1500 you can also get XM weather and radio on the GRT - so  you don't need to buy a Garmin 396 or 496 for something over $2000.  And  the GRT has a bigger screen than the Garmin.

 -The Dynon I have been using does have TAS, OAT, G meter and density  altitude, but you can not display all at the same time.  Either  that or I don't know how to get all the info to display at the same  time.  

 -The Dynon does have lots of other things that I think is basically  "useless".  But then maybe some people want their EFIS to tell them the  phonetic alphabet, or what the tower light signals mean, etc.   

     As to the Advanced Flight Systems, I have only seen  it in advertisements.  It sounds good.  However, I know nothing about  the company and how long they have  been around.  

     Please forgive me if it seems that I am running  down the Dynon, but I am just calling it like I see it.  I know the GRT  costs more, but you get so much more.  Also, there is now the Sport version  of the GRT which is less.  So, read up on what is available, what each  system costs, fly behind both if you can, and look at each at OSH.  Decide  on what features are important and do your cost analysis.  That is what I  did, and decided on the GRT.  Your mileage may vary.

 Blue Skies,

 Buz



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  [quote][b]

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pjdisher(at)bigpond.com
Guest

Posted: Mon May 28, 2007 9:37 pm Post subject: EFIS

Hi Buz,

         I would just like to say Buz,  how much I've appreciated and enjoyed all yours and Brian W. comments and  evaluations on the Lightning a/c over the past many months on  matronics.   Its just now i'm trying to decide what to put in my  instrument panel and do appreciate your note to Jim.    I am  going to Oshkosh in July and will take your advice and will have a good look  before I buy. 

        If your going to OSH I would certinly  like to catch up with you guys.

        Thanks again and keep up your very  constructive reporting.

  

        Regards.

        Peter Disher

        Hallidays Point

        NSW     2430

         AUSTRALIA          

 [quote]   ---

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N1BZRich(at)AOL.COM
Guest

Posted: Tue May 29, 2007 6:41 pm Post subject: EFIS

In a message dated 5/29/2007 1:38:33 A.M. Eastern Daylight Time,  pjdisher(at)bigpond.com writes:

  	  Quote: 	
		  I would    just like to say Buz, how much I've appreciated and enjoyed all yours and    Brian W. comments and evaluations on the Lightning  	


 

 Hi Peter,

     Darn, you mean someone actually reads all that  stuff I have written?   Anyway, glad to be of help.  I was  fortunate enough to meet the Lightning guys just over two years ago and I have  thoroughly enjoyed that friendship since then.  They are all dedicated EAA  members, aircraft builders, and of course helping others to achieve their dreams  to build and fly an airplane.  Good people, and because of them I have been  able to fly several of the Lightnings and all the Jabiru airplanes that  they also build and sell.  

        Being  from Australia maybe you can answer one of my questions.  Since  you are in the "land down under" do you need an inverted airfoil to get your  airplanes to fly?  Inquiring minds want to know.  

 Blue Skies,

 Buz



See what's free at AOL.com. 

  [quote][b]

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pjdisher(at)bigpond.com
Guest

Posted: Tue May 29, 2007 7:59 pm Post subject: EFIS

Hi Buz,

  

          Yes mate,  What we do  down here is simply swap the wings over when we put them together.

          Buz, for 25 years I had  been looking for an a/c kit to buy and out of the blue came "Lightning".  so, sight unseen I just had to have one,  Is half built now and it's  just looking better all the time.

          No doubt about  it, you guys contiued corespondence just confirms I have made the right  decision. I'm looking forward to the day when when i'm rolling on 04  Taree.

  

 Regards,

 Peter Disher

  

     

 [quote]   ---

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lozhoffman(at)yahoo.com
Guest

Posted: Wed May 30, 2007 1:37 am Post subject: EFIS

Buz,

 	  Quote: 	
		  From where we stand its you guys who must have to use

inverted airfoils. 
	


Laurie



--- Peter and Jan Disher <pjdisher(at)bigpond.com> wrote:



[quote] Hi Buz,

 

          Yes mate,  What we do down here is simply

 swap the wings over when we put them together.

          Buz, for 25 years I had been looking for an

 a/c kit to buy and out of the blue came "Lightning".

 so, sight unseen I just had to have one,  Is half

 built now and it's just looking better all the time.

          No doubt about it, you guys contiued

 corespondence just confirms I have made the right

 decision. I'm looking forward to the day when when

 i'm rolling on 04 Taree.

 

 Regards,

 Peter Disher

 

     

   ---

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N1BZRich(at)AOL.COM
Guest

Posted: Wed May 30, 2007 5:06 am Post subject: EFIS

In a message dated 5/30/2007 5:39:19 A.M. Eastern Daylight Time,  lozhoffman(at)yahoo.com writes:

  	  Quote: 	
		  From    where we stand its you guys who must have to use

inverted airfoils.    

	


 

 HI Laurie,

     Good to hear from you again.  Just to be sure  I understand, if I were to fly from here to the "land down under", or you were  to fly from there to here, at some place between the two we would need to do a  half roll?  Does it matter which way you roll.  Does the coriolis  effect come into play?  Isn't aerospace science and geography  wonderful.  

 Blue Skies,

 Buz



See what's free at AOL.com. 

  [quote][b]

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lozhoffman(at)yahoo.com
Guest

Posted: Thu May 31, 2007 12:01 am Post subject: EFIS

Buz, Buz, Buz,

Your meagre attempt to bamboozle me by throwing in

that obscure reference to the 'coriolis effect' failed

miserably. Everyone knows that our toilets in this

hemisphere flush in the opposite direction to yours so

obviously the coriolis effects will cancel each other

out.



By constructing a series of models and filling several

pages with various relevant calculations, diagrams,

graphs and sketches I am now able to effectively

challenge your theory.



You may roll right. You may roll left. But to no

avail. We shall use basic aerospace science and

geography, since you have chosen these platforms upon

which to argue your case, to in fact disprove it.



Now just pretend that I am Superman (I do this

regularly but am yet to convince my wife to join in)

with my x-ray vision. This is the aerospace science

part. As I peer down into the ground beneath my

feet(between flights that is) using my infinitely

penetrating vision all the way through the very centre

of the Earth and to the opposite surface of the world

(try to stay with me on this), I will undoubtedly see

something.



It will either be someone in China as is most often

espoused or you in your hometown in the US. This is

the geography part. So if I am actually looking down

at you it is in fact you who is 'down under' and me

who is 'up over'!



I haven't quite worked out yet what our relative

positions would be if we ever do meet somewhere but

hey, lets be realistic about this. What are the

chances of that?

Laurie 



--- N1BZRich(at)aol.com wrote:



 	  Quote: 	
		    

 In a message dated 5/30/2007 5:39:19 A.M. Eastern

 Daylight Time,  

 lozhoffman(at)yahoo.com writes:

 

 >From  where we stand its you guys who must have to

 use

 inverted airfoils.  

 

 

 

 HI Laurie,

     Good to hear from you again.  Just to be sure  I

 understand, if I were to 

 fly from here to the "land down under", or you were 

 to fly from there to 

 here, at some place between the two we would need to

 do a  half roll?  Does it 

 matter which way you roll.  Does the coriolis 

 effect come into play?  Isn't 

 aerospace science and geography  wonderful.  

 Blue Skies,

 Buz

 

 

 

 ************************************** See what's

 free at http://www.aol.com.

 


	


       

http://smallbusiness.yahoo.com/webhosting

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