---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Thu 06/20/13: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:07 PM - pitot test (thomas sargent) 2. 04:38 PM - Re: pitot test (Dave Saylor) 3. 09:57 PM - Re: pitot test (David Leonard) ________________________________ Message 1 _____________________________________ Time: 04:07:27 PM PST US Subject: RV-List: pitot test From: thomas sargent Does any one know an acceptable leak rate for the Pitot system? Mine is pretty bad right now. If I pressurize the pitot so that airspeed shows about 130kts, it leaks down about 7 or 8 kts/minute. What is an acceptable leak rate in terms of kts/minute (or should I say minutes/kt)? I should say this is not an IFR plane. Thanks, -- Tom Sargent ________________________________ Message 2 _____________________________________ Time: 04:38:57 PM PST US Subject: Re: RV-List: pitot test From: Dave Saylor That's not bad at all. Our static shop always says to remember that pitot is "an infinite column"--that is, it's always being refreshed. A good rule of thumb would be that if you can't easily see that it's dropping then you're doing OK. If the needle (or EFIS) movement catches your eye it's probably too much. If you have a mechanical indicator, remember to disconnect the airspeed static when you do the altimeter check. On Thursday, June 20, 2013, thomas sargent wrote: > Does any one know an acceptable leak rate for the Pitot system? Mine is > pretty bad right now. If I pressurize the pitot so that airspeed shows > about 130kts, it leaks down about 7 or 8 kts/minute. > > What is an acceptable leak rate in terms of kts/minute (or should I say > minutes/kt)? > > I should say this is not an IFR plane. > > Thanks, > > -- > Tom Sargent > > * > > * > > -- Dave Saylor 831-750-0284 CL ________________________________ Message 3 _____________________________________ Time: 09:57:47 PM PST US Subject: Re: RV-List: pitot test From: David Leonard Dave Salor has it right, but just to add to that.. The "pitot-static test" is actually just a "static" test. There are no standards the pitot portion must pass. They always seem to test it, but it is just optional for IFR. For VFR, they don't even test the static system, it is just a transponder test. You wouldn't want it crazy out of wack, but it sounds like you are fine. On Thu, Jun 20, 2013 at 4:37 PM, Dave Saylor < dave.saylor.aircrafters@gmail.com> wrote: > That's not bad at all. Our static shop always says to remember that pitot > is "an infinite column"--that is, it's always being refreshed. A good rule > of thumb would be that if you can't easily see that it's dropping then > you're doing OK. If the needle (or EFIS) movement catches your eye it's > probably too much. > > If you have a mechanical indicator, remember to disconnect the airspeed > static when you do the altimeter check. > > > On Thursday, June 20, 2013, thomas sargent wrote: > >> Does any one know an acceptable leak rate for the Pitot system? Mine is >> pretty bad right now. If I pressurize the pitot so that airspeed shows >> about 130kts, it leaks down about 7 or 8 kts/minute. >> >> What is an acceptable leak rate in terms of kts/minute (or should I say >> minutes/kt)? >> >> I should say this is not an IFR plane. >> >> Thanks, >> >> -- >> Tom Sargent >> >> * >> >> t="_blank">http://www.matronics.com/Navigator?RV-List >> tp://forums.matronics.com >> _blank">http://www.matronics.com/contribution >> * >> >> > > -- > Dave Saylor > 831-750-0284 CL > > * > > * > > -- David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv-list Browse Digests http://www.matronics.com/digest/rv-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.