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good deal on 0-150 MPH Kitfox ASI

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thesupe(at)hotmail.com
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Posted: Fri Aug 08, 2008 4:36 am Post subject: good deal on 0-150 MPH Kitfox ASI

Hi all C  I was just on ebay and saw a real good price for a Kitfox labled ASI C  $42.50 buy it now.  Yes that's right.  This guy has bought up a bunch of new instruments from someone that went out of buisness and is selling them cheap.  I bought one from him for an Avid a few months ago and it worked fine.  Just go to ebay motors and search for Kitfox.  It is in the lower part of the page C ebay stores.  I have nothing to do with this sale C I'm just passing it along.  Jim Chuk  Kitfox 4 building C Avid MK IV and Avid B flying  Mn

Your PC C mobile phone C and online services work together like never before. See how Windows® fits your life  [quote][b]

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FlyboyTR

Joined: 04 Nov 2006
Posts: 215
Location: Mobile, Alabama

Posted: Sat Aug 09, 2008 5:27 pm Post subject: Re: good deal on 0-150 MPH Kitfox ASI

My ASI was leaking on the static side.  I replaced it about a month ago from the guy on eBay.  ...Although...It was $67 at that time.  They are new, but the documentation paperwork shows that mine was inspected in 1989...So it is old...but new and was still in sealed factory wrap and was well boxed and protected.  And...Is working fine.



Travis

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_________________
Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Sun Aug 10, 2008 1:31 am Post subject: Re: good deal on 0-150 MPH Kitfox ASI

I bought a Kitfox ASI from him last March. I think it was 55$ or so. 

I have not installed it yet.  Mine , like many reads high at cruise and low at stall.  

eg  cruise TAS 93      ASI read about 110  mph

stall  TAS 37             ASI reads about 25 to 28 mph 



at approach 50 MPH it is dead on

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_________________
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FlyboyTR

Joined: 04 Nov 2006
Posts: 215
Location: Mobile, Alabama

Posted: Sun Aug 10, 2008 2:06 am Post subject: Re: good deal on 0-150 MPH Kitfox ASI

Prior to my purchase...I built a manometer to check the pitot and static systems.  It will also check the accuracy of the gauge.  The "new" Kitfox ASI and my Rocky Mountain Encoder (digital) both read within 2-3 MPH through the entire speed envelope.  Also, they are both accurate (calibration) within same.

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_________________
Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Sun Aug 10, 2008 2:40 am Post subject: Re: good deal on 0-150 MPH Kitfox ASI

Travis, I do not have a external static port.  

My ASI will lower about 5 mph when i open door at cruise

and it if drag my arm out door the more wind resitsance i get the lower the ASI  goes. 



I should really build a external static port but it just never been an issue. I could assume that if i install the new ASI that my readings would be just as erratic ?

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FlyboyTR

Joined: 04 Nov 2006
Posts: 215
Location: Mobile, Alabama

Posted: Sun Aug 10, 2008 2:55 am Post subject: Re: good deal on 0-150 MPH Kitfox ASI

Without a static port (just open to the cockpit or back of the instrument) your ASI can change as pressure inside the airplane is increased or decreased.  When you open the door (generally speaking) you are increasing the pressure inside the cockpit which would cause a decrease in your ASI reading.



A friend our our "little" airport flys a Thundergull J2.  He has it sealed up nicely and installed numerous vents.  During the cool season he didn't have a problem on landing (speed wise).  But come summertime he was landing long and hot.  Turned out that with his vents open, he was reading approximately 8-10 MPH slow.  One of his leg vents was also directing air towards the end of his static tube outlet (behind the panel).



...stuff happens!



...Oh...about your arm stuck outside.  You are probably directing more air into the plane...more pressure...lower ASI reading.



jTravis

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_________________
Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Sun Aug 10, 2008 3:00 am Post subject: Re: good deal on 0-150 MPH Kitfox ASI

 	  Quote: 	
		  Oh...about your arm stuck outside. You are probably directing more air into the plane...more pressure...lower ASI reading. 

	


YUP !!



But in all fairness,  the ASI is fairly accurate "guide" to your airspeed just the pilot knowing his airplane is even better. I think that most should learn to fly without one in the case of your not working.  Part of my pre flight is to check the little flipper on my pitot tube as it seems to stick once in a while. I just put on floats about 6 weeks ago and the first flight i forgot to check it so i flew without the ASI for the first hour of flying to the lake and back.

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