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Pitot tube mast

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Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Wed Feb 08, 2012 8:41 pm Post subject: Pitot tube mast

I will be installing the Dynon heated pitot/AOA. They recommend either

the Gretz or SafeAir. While the Gretz is more than double the price, I'm

sitting on the fence. Anyone have strong reasons for one over the other?

Kelly

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

bill.peyton

Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

Posted: Thu Feb 09, 2012 4:53 pm Post subject: Re: Pitot tube mast

I installed the safeair. The quality looks fine and the install was not difficult.

_________________
Bill
WA0SYV
Aviation Partners, LLC

Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Thu Feb 09, 2012 6:19 pm Post subject: Pitot tube mast

Thanks Bill. I was beginning to wonder if my question made it to the

list. I know some used the Gretz....arguments for it?



On Thu, Feb 9, 2012 at 5:53 PM, bill.peyton <peyton.b(at)sbcglobal.net> wrote:

 	  Quote: 	
		   



 I installed the safeair.  The quality looks fine and the install was not difficult.



 --------

 Bill Peyton





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=365997#365997

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

Strasnuts

Joined: 10 Feb 2009
Posts: 502
Location: Salt Lake City, UT

Posted: Thu Feb 09, 2012 6:31 pm Post subject: Pitot tube mast

Hey Kelly,



I have the Gretz.  The first one I hooked up melted when I powered it up. 

Since SteinAir is so awesome they sent me another one right away.  Must have 

had a bad batch of pitots way back then. The second one worked/works great. 

I would go for the simplest solution.  The Gretz has a timer and three 

lights for the panel, (fail),(heat),(idle).  I think a pitot that you turn 

on if there is visible moisture and 10 C or less and forget about it is 

good.  The only thing I like about the Gretz is there is a light that is on 

when it is on.  As long as you have a way to remind you it's on.  Maybe one 

light would be sufficient without a timer.  I don't know anything about the 

other pitots so I can't say they would be simpler.



Sean

---

_________________
40936
RV-10 SB N801VR Flying
780 Hours
SuperSTOL 60 hours

mregoan(at)hispeed.ch
Guest

Posted: Fri Feb 10, 2012 4:42 am Post subject: Pitot tube mast

Hi Kelly,



I just finished installing the Gretz mount for the Dynon pitot.  



The Gretz kit appears to be slightly more complicated, having a reinforcing backplate riveted to the skin and spar, plus a spacer plate and most of the nutplates and bolts required (except those to join the pitot and mast).   The arrangement is obviously heavier (steel mast, more parts) but perhaps more robust (no cracking history).  The mast is removable for storage and painting if wanted (eg. with the chrome mast) and is not in place when you rivet the bottom skins on.  The mast is bolted afterwards to the reinforcement plate inside the wing. 



In consultation with my tech advisor I also added an additional length of J-stiffener along the back edge of the reinforcing plate to reduce skin flexing under load.  Altogether it became a little complex (perhaps over engineered) but it shouldn't fall off…. 



Cheers,



Gordon 

41015 Switzerland

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napolin(at)me.com
Guest

Posted: Fri Feb 10, 2012 10:37 am Post subject: Pitot tube mast

I installed the gretz.  Its pretty straightforward and appears sturdy.  Havent flown it yet.  Dont know how it compares to others.

Niko

On Feb 9, 2012, at 9:17 PM, Kelly McMullen <apilot2(at)gmail.com> wrote:

 	  Quote: 	

 Thanks Bill. I was beginning to wonder if my question made it to the

 list. I know some used the Gretz....arguments for it?

 On Thu, Feb 9, 2012 at 5:53 PM, bill.peyton <peyton.b(at)sbcglobal.net> wrote:

> 

> 

> I installed the safeair.  The quality looks fine and the install was not difficult.

> 

> --------

> Bill Peyton

> 

> 

> 

> 

> Read this topic online here:

> 

> http://forums.matronics.com/viewtopic.php?p=365997#365997

> 

> 

> 

> 

> 

> 

> 

> 

> 

>

Tim Olson

Joined: 25 Jan 2007
Posts: 2872

Posted: Fri Feb 10, 2012 11:11 am Post subject: Pitot tube mast

While the only one I know is the Gretz, I've been happy with it.

I bought it only for it's thermostatic control. I leave it

on for long periods of time and I see by the lights that it

only cycles as-needed.  So from an energy (battery) conservation

perspective, I like it.  That said, I'd probably not be too

unhappy with any good heated pitot.  The gretz mount I liked

either way.

Tim

  On 2/10/2012 12:36 PM, Nikolaos Napoli wrote:

 	  Quote: 	

 I installed the gretz.  Its pretty straightforward and appears sturdy.  Havent flown it yet.  Dont know how it compares to others.

 Niko

 On Feb 9, 2012, at 9:17 PM, Kelly McMullen<apilot2(at)gmail.com>  wrote:

> 

>

> Thanks Bill. I was beginning to wonder if my question made it to the

> list. I know some used the Gretz....arguments for it?

>

> On Thu, Feb 9, 2012 at 5:53 PM, bill.peyton<peyton.b(at)sbcglobal.net>  wrote:

>> 

>>

>> I installed the safeair.  The quality looks fine and the install was not difficult.

>>

>> --------

>> Bill Peyton

>>

rv10rob(at)gmail.com
Guest

Posted: Fri Feb 10, 2012 12:52 pm Post subject: Pitot tube mast

I used the Dynon pitot in the Gretz mount.  No complaints so far.  As Tim notes, the thermostatic control really seems to save power.  



On Fri, Feb 10, 2012 at 11:09 AM, Tim Olson <Tim(at)myrv10.com (Tim(at)myrv10.com)> wrote:

  	  Quote: 	
		  --> RV10-List message posted by: Tim Olson <Tim(at)myrv10.com (Tim(at)myrv10.com)>

  

 While the only one I know is the Gretz, I've been happy with it.

 I bought it only for it's thermostatic control. I leave it

 on for long periods of time and I see by the lights that it

 only cycles as-needed.  So from an energy (battery) conservation

 perspective, I like it.  That said, I'd probably not be too

 unhappy with any good heated pitot.  The gretz mount I liked

 either way.

 

 Tim

 

 

  On 2/10/2012 12:36 PM, Nikolaos Napoli wrote:

  	  Quote: 	
		   -->  RV10-List message posted by: Nikolaos Napoli<napolin(at)me.com (napolin(at)me.com)>

 

 I installed the gretz.  Its pretty straightforward and appears sturdy.  Havent flown it yet.  Dont know how it compares to others.

 

 Niko

 

 

 On Feb 9, 2012, at 9:17 PM, Kelly McMullen<apilot2(at)gmail.com (apilot2(at)gmail.com)>  wrote:

 

  	  Quote: 	
		   -->  RV10-List message posted by: Kelly McMullen<apilot2(at)gmail.com (apilot2(at)gmail.com)>

 

 Thanks Bill. I was beginning to wonder if my question made it to the

 list. I know some used the Gretz....arguments for it?

 

 On Thu, Feb 9, 2012 at 5:53 PM, bill.peyton<peyton.b(at)sbcglobal.net (peyton.b(at)sbcglobal.net)>  wrote:

  	  Quote: 	
		   -->  RV10-List message posted by: "bill.peyton"<peyton.b(at)sbcglobal.net (peyton.b(at)sbcglobal.net)>

 

 I installed the safeair.  The quality looks fine and the install was not difficult.

 

 --------

 Bill Peyton

 

 	
	
	
 



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-- 

Rob Kochman

RV-10 Flying since March 2011

 Woodinville, WA

 http://kochman.net/N819K



  [quote][b]

johngoodman

Joined: 18 Sep 2006
Posts: 530
Location: GA

Posted: Sat Feb 11, 2012 6:05 am Post subject: Re: Pitot tube mast

I have the Dynon heated AoA with the Gretz mount. Works fine. I remember it was a complicated install.

John

_________________
#40572 Phase One complete in 2011

Bob Turner

Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA

Posted: Sat Feb 11, 2012 1:25 pm Post subject: Re: Pitot tube mast

I also have the Gretz mount and the Dynon Pitot. I thought the installation was straightforward. I did it prior to riveting the skin.



The Dynon is, like the Gretz, thermostatically controlled. It will drive a light to show that it's turned on and working. I haven't yet hooked it up to anything other than my GRT EIS.



Software guru's: 

Does anyone know if it's possible to code the GRT EIS so that with the OAT < 5 C AND a given analog input (hooked to the pitot sensor) high, it will send a warning? e.g., I'd like to get a pitot heat reminder if I forget to turn it on when the OAT < 5C.

_________________
Bob Turner
RV-10 QB

rene(at)felker.com
Guest

Posted: Sat Feb 11, 2012 4:29 pm Post subject: Pitot tube mast

How about this for a 2 minute answer.....



Use the coolant temp line on your EIS and set the lower end to alarm at -5C.

Put that line through a normally closed relay that is activated by the pilot

heat (on line)....



Now I can already see a couple of problems with that, but they could be

worked out....like what is the reading with no input...would you have to

provide a false signal for when the heat is on, etc.



Another idea that would work.....a couple of years ago at an AOPA event I

saw a guy selling an ice detector.  You could use one of those to warn you

when you have ice.  You would have to figure out where to mount it so that

it ices up first so that if you have not turned on the pitot heat you are

not too late.  You could use one of the analog lines in the GRT system.



I will put more than two minutes on this later......I am not an electronics

guy....I may have been trained by the Air Force back in the 70's but since

then electricity has changed.....or maybe I have just gotten older.



--

Bob Turner

Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA

Posted: Sat Feb 11, 2012 5:16 pm Post subject: Re: Pitot tube mast

Rene,



Thanks for your thoughts. Problem is, there is only one analog output for all alarms. I don't want "pitot heat needed" illuminating when it's time to change fuel tanks, for example.



Of course the serial output line has all the info. But that sounds a lot harder.



Bob

_________________
Bob Turner
RV-10 QB

rene(at)felker.com
Guest

Posted: Sat Feb 11, 2012 5:50 pm Post subject: Pitot tube mast

I was thinking GRT EFIS when I wrote that.  



http://www.newavionics.com/9732_oem.html#icing



You could run a separate warning light.....but maybe overkill.



--

dmaib(at)mac.com
Guest

Posted: Sun Feb 12, 2012 4:19 pm Post subject: Pitot tube mast

I will echo Tim's comments. I have no experience with the others, but  

have been very happy with the Gretz. Installation was straight forward.

David Maib

40559

Flying 460 hours

On Feb 10, 2012, at 2:09 PM, Tim Olson wrote:

 	  Quote: 	

 While the only one I know is the Gretz, I've been happy with it.

 I bought it only for it's thermostatic control. I leave it

 on for long periods of time and I see by the lights that it

 only cycles as-needed.  So from an energy (battery) conservation

 perspective, I like it.  That said, I'd probably not be too

 unhappy with any good heated pitot.  The gretz mount I liked

 either way.

 Tim

  On 2/10/2012 12:36 PM, Nikolaos Napoli wrote:

> 

>

> I installed the gretz.  Its pretty straightforward and appears  

> sturdy.  Havent flown it yet.  Dont know how it compares to others.

>

> Niko

> On Feb 9, 2012, at 9:17 PM, Kelly McMullen<apilot2(at)gmail.com>  wrote:

>

>> 

>>

>> Thanks Bill. I was beginning to wonder if my question made it to the

>> list. I know some used the Gretz....arguments for it?

>>

>> On Thu, Feb 9, 2012 at 5:53 PM,  

>> bill.peyton<peyton.b(at)sbcglobal.net>  wrote:

>>> 

>>> "bill.peyton"<peyton.b(at)sbcglobal.net>

>>>

>>> I installed the safeair.  The quality looks fine and the install  

>>> was not difficult.

>>>

>>> --------

>>> Bill Peyton

>>>

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