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Static port WAS: Battery Location

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Michel

Joined: 10 Jan 2006
Posts: 966
Location: Norway

Posted: Wed Jan 16, 2008 6:34 am Post subject: Static port WAS: Battery Location

On Jan 16, 2008, at 3:02 PM, Noel Loveys wrote:

 	  Quote: 	
		   That area of the inside of the fuselage could be a lower pressure 

 area.� That would make your Alt read too high and your ASI read too 

 low.


	


If there is a greater pressure difference between the pitot tube and 

the static port, wouldn't that make the ASI read too high, Noel?



Cheers,

Michel Verheughe

Norway

Kitfox 3 - Jabiru 2200

_________________
Kitfox 3 - Jabiru 2200

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Wed Jan 16, 2008 1:22 pm Post subject: Static port WAS: Battery Location

Yes... if there is a greater pressure difference.  Pitot pressure is positive and a positive pressure on the static port will display a lower airspeed.  A lower pressure on the static port will make the ASI read too high ( not good ) and the Altimeter read too high, also not too good.  I may have got my jords wumbled.  

   

BTW.  For the benefit of others reading this I was reading a passage( just like the bible ) in AC 43 today that reminded me to never allow negative pressure differential in the pitot line of an ASI ( Negative speed )  

   

When I was in school, the only thing we would hook up to a pitot static system was a Barfield tester or a bottle of nitrogen used to clean out and dry the lines when they were disconnected from the instruments.   

   

Noel  

   

--

_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

avidfox

Joined: 03 Apr 2007
Posts: 87

Posted: Wed Jan 16, 2008 2:15 pm Post subject: Static port WAS: Battery Location

What I haven't seen so far is any mention of static drains or alternate static source for use in case moisture collects, and\or freezes in the line itself. 

  

 Just thinking out loud here..

 ...

 btw...except for the alt encoder being plumbed into the altimeter, all my instruments static openings are just open, to cabin pressure. No big deal, no major errors.

  

 Steve

 84KF



  [quote][b]

patreilly43(at)hotmail.co
Guest

Posted: Wed Jan 16, 2008 2:58 pm Post subject: Static port WAS: Battery Location

Steve, I have wondered all along why in an unpressurized cabin why you need a static port to the outside? Especially in our type of planes that can't be and are never sealed worth a damn.  Pat Reilly

 [quote]  Date: Wed, 16 Jan 2008 17:12:19 -0500

From: avidfox(at)gmail.com

To: kitfox-list(at)matronics.com

Subject: Re: Static port WAS: Battery Location

 What I haven't seen so far is any mention of static drains or alternate static source for use in case moisture collects, and\or freezes in the line itself. 

 Just thinking out loud here..

 ...

 btw...except for the alt encoder being plumbed into the altimeter, all my instruments static openings are just open, to cabin pressure. No big deal, no major errors.

 Steve

 84KF

 	  Quote: 	

arget=_blank>http://www.matronics.com/Navigator?Kitfox-List

p://forums.matronics.com

blank>http://www.matronics.com/contribution

[b]

avidfox

Joined: 03 Apr 2007
Posts: 87

Posted: Wed Jan 16, 2008 3:22 pm Post subject: Static port WAS: Battery Location

Patrick,

 The instruments on my PA-15 vagabond were open (no static lines, ports, etc.) and it worked fine for what it was. The downside was, when I opened the sliding side window, a slightly lower pressure was created in the cabin due to the air rushing by, causing a very slight change in indicated airspeed, maybe 3-5 mph.  I would also get a slight VSI indication change (just a burp) Altimeter change,i f any, was so slight it's not worth mentioning. 

 If one want to get anal about these things then it matteres, but the changes were so slight that it was a non-issue. 

  

 Steve

 84KF

  

    



  [quote][b]

akflyer

Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

Posted: Wed Jan 16, 2008 3:23 pm Post subject: Re: Static port WAS: Battery Location

Steve, I have wondered all along why in an unpressurized cabin why you need a static port to the outside? Especially in our type of planes that can't be and are never sealed worth a damn. Pat Reilly 



Speak for your own plane... next time I am dumb enough to try and fly at -25, I am gonna have the ole lady bust out the duct tape once I get in.. I'll make sure that bugger is sealed up tighter than a frogs.... ahh orifice.



remember, if they cant find you attractive, they should at least find you handy.



Seriously though, the instruments on my brothers KF are just running off cabin static and GPS shows the VSI and airspeed to be darn near dead on.

_________________
DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009

I would rather die trying to live, than to live trying not to die....

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Wed Jan 16, 2008 3:58 pm Post subject: Re: Static port WAS: Battery Location

I have a feeling the Dan Denney used to get some chinese ASI s  ? 



Mine read pretty good  up to around  60to 70 then it outpaces it 's self



at 92 mph cruise in gps my ASI will show about 105 to 110 mph .

many times my ASI goes past  the 120 or 125 red zone and around  to about 20 or 30 mph.  and below  50 mph it reads low



but really does it matter?   Works well lower and I know where it stalls.

_________________
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avidfox

Joined: 03 Apr 2007
Posts: 87

Posted: Wed Jan 16, 2008 4:08 pm Post subject: Static port WAS: Battery Location

"....next time I am dumb enough to try and fly at -25, I am gonna have the ole lady bust out the duct tape once I get in.. I'll make sure that bugger is sealed up tighter than a frogs"

  

  

 Leni,

     You'll have to send me the part # of your duct tape,

 Mine tends become brittle and fall apart below +20F

   Steve

  [quote][b]

akflyer

Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

Posted: Wed Jan 16, 2008 4:13 pm Post subject: Re: Static port WAS: Battery Location

nashau duct tape.  IT is the only tape to buy.  It is the only tape we have found that holds up to the harsh north slope weather and will stick when cold!.. the bad part is if you want to get out, you will have to be cut out of the plane cause you are not gonna bust it loose just by pushing on the door. ( I was only half kidding about having the wife tape me in lol.. )

Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Wed Jan 16, 2008 4:32 pm Post subject: Static port WAS: Battery Location

I listened to both arguments, and opted for the "finished" look of a  

system where all the ports on the instruments were actually connected  

to lines, looking like they did something. Call me anal, I guess. If  

I was a weight freak, maybe I'da left 'em off.

The argument that sold it for me was opening a vent and having a  

gauge go nuts...not very professional.



Lynn Matteson

Grass Lake, Michigan

Kitfox IV Speedster  w/Jabiru 2200

flying w/460+ hrs

On Jan 16, 2008, at 6:23 PM, akflyer wrote:



 	  Quote: 	
		   



 Steve, I have wondered all along why in an unpressurized cabin why  

 you need a static port to the outside? Especially in our type of  

 planes that can't be and are never sealed worth a damn. Pat Reilly



 Speak for your own plane... next time I am dumb enough to try and  

 fly at -25, I am gonna have the ole lady bust out the duct tape  

 once I get in.. I'll make sure that bugger is sealed up tighter  

 than a frogs.... ahh orifice.



 remember, if they cant find you attractive, they should at least  

 find you handy.



 Seriously though, the instruments on my brothers KF are just  

 running off cabin static and GPS shows the VSI and airspeed to be  

 darn near dead on.



 --------

 DO NOT ARCHIVE

 Leonard Perry

 Soldotna AK

 Avid &quot;C&quot; / Mk IV

 582 IVO IFA

 Full Lotus 1260

 95% complete





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=158651#158651

_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Wed Jan 16, 2008 4:33 pm Post subject: Static port WAS: Battery Location

Ever try Gorilla Duct Tape? That stuff is tenacious. It's hard to  

even get it off the roll. I've used Performance Automotive's "racer's  

tape" available in colors. I don't know the actual name of the tape.



Lynn Matteson

Grass Lake, Michigan

Kitfox IV Speedster  w/Jabiru 2200

flying w/460+ hrs

do not archive

On Jan 16, 2008, at 7:13 PM, akflyer wrote:



 	  Quote: 	
		   



 nashau duct tape.  IT is the only tape to buy.  It is the only tape  

 we have found that holds up to the harsh north slope weather and  

 will stick when cold!.. the bad part is if you want to get out, you  

 will have to be cut out of the plane cause you are not gonna bust  

 it loose just by pushing on the door. ( I was only half kidding  

 about having the wife tape me in lol.. )



 --------

 DO NOT ARCHIVE

 Leonard Perry

 Soldotna AK

 Avid &quot;C&quot; / Mk IV

 582 IVO IFA

 Full Lotus 1260

 95% complete





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=158663#158663

_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

akflyer

Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

Posted: Wed Jan 16, 2008 5:08 pm Post subject: Re: Static port WAS: Battery Location

the gorilla pales in comparison (at least the 2 rolls I tried).  I have used the Nashua for float repairs, boat repairs etc. and it has yet to let me down.  



And to keep this on topic, you could use a small piece of the tape, and cover the static ports for an experiment.  The tape should be good for 150 mph.

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Wed Jan 16, 2008 5:43 pm Post subject: Static port WAS: Battery Location

Until you open the door... then the effect is minimal but noticible.  

   

Noel  

     

From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of 84KF

 Sent: Wednesday, January 16, 2008 6:42 PM

 To: kitfox-list(at)matronics.com

 Subject: Re: Static port WAS: Battery Location  

  

     

What I haven't seen so far is any mention of static drains or alternate static source for use in case moisture collects, and\or freezes in the line itself.   

    

   

    

Just thinking out loud here..  

    

...  

    

btw...except for the alt encoder being plumbed into the altimeter, all my instruments static openings are just open, to cabin pressure. No big deal, no major errors.  

    

   

    

Steve  

    

84KF  

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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Wed Jan 16, 2008 6:15 pm Post subject: Static port WAS: Battery Location

Use speed tape... it’s a super sticky aluminium foil.  Great to have in the box for quick repairs of perforated wings etc.  Only problem is getting the stuff off!  

   

Noel  

     

From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of 84KF

 Sent: Wednesday, January 16, 2008 8:34 PM

 To: kitfox-list(at)matronics.com

 Subject: Re: Re: Static port WAS: Battery Location  

  

     

"....next time I am dumb enough to try and fly at -25, I am gonna have the ole lady bust out the duct tape once I get in.. I'll make sure that bugger is sealed up tighter than a frogs"  

    

   

    

   

    

Leni,  

    

    You'll have to send me the part # of your duct tape,  

    

Mine tends become brittle and fall apart below +20F  

    

  Steve  

   	  Quote: 	
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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

Guy Buchanan

Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

Posted: Wed Jan 16, 2008 8:54 pm Post subject: Static port WAS: Battery Location

At 02:12 PM 1/16/2008, you wrote:

 	  Quote: 	
		  What I haven't seen so far is any mention of static drains or 

alternate static source for use in case moisture collects, and\or 

freezes in the line itself.


	


I did a pitot drain because of the dramatic height change. It's just 

a loop with a stub at the bottom. Unfortunately I didn't make it very 

easy to service. Too impatient. I didn't drain the static because it 

is pretty much up-hill from the source to the instrument.

Guy Buchanan

San Diego, CA

K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.

_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too.

shinco(at)bright.net
Guest

Posted: Wed Jan 16, 2008 9:04 pm Post subject: Static port WAS: Battery Location

akflyer wrote:

 	  Quote: 	
		   



 the gorilla pales in comparison (at least the 2 rolls I tried).  I have used the Nashua for float repairs, boat repairs etc. and it has yet to let me down.  



 And to keep this on topic, you could use a small piece of the tape, and cover the static ports for an experiment.  The tape should be good for 150 mph.



 --------

 DO NOT ARCHIVE

 Leonard Perry

 Soldotna AK

 Avid &quot;C&quot; / Mk IV 

 582 IVO IFA

 Full Lotus 1260

 95% complete





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=158669#158669





   

Duck tape was invented in WW2,to field repair  aircraft so they could be 
	


put back into.service as soon as they could.so I guess if Duck tape was 

good on fighter aircraft 300mph.it is good on a Kitfox to.WOW a kitfox 

covered with all Duck Tape..it would make thing alot cheaper and 

easer..Steve Shinabery  554KF  KF2 little 582

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