CT2K Posted March 20, 2019 Report Share Posted March 20, 2019 Just purchased an AvMAp Ultra EFIS. User and installation manual says "Installation ... is supported by mean of a T coupler (not included in the Ultra box)". Any place you would kindly recommend to get this T Coupler, please? Here is a picture of the installation diagram: Link to comment Share on other sites More sharing options...
Roger Lee Posted March 20, 2019 Report Share Posted March 20, 2019 Since these lines are plastic. Ace Aviation has them locally or Amazon. They are just compression fittings. Link to comment Share on other sites More sharing options...
Warmi Posted March 20, 2019 Report Share Posted March 20, 2019 Check out this video ... it should help. Link to comment Share on other sites More sharing options...
CT2K Posted March 20, 2019 Author Report Share Posted March 20, 2019 Thank you so much guys for stopping by and contributing. That video was really very helpful. Again thanks. Now please forgive this stupid question: Apart from the airspeed pitoI don't see any static port stretching out of my CT. I wonder where should the static connection on the Avmap (see picture) should go? Link to comment Share on other sites More sharing options...
SkyrangerRich Posted March 20, 2019 Report Share Posted March 20, 2019 I think the static port on my CTSW is in the very bottom of the fuselage, you can see the plastic pipe through the hatch on the floor under your feet on the P1 side of the aircraft. You must have a static line? There are two pressure feeds going to your ASI and/or EFIS? (An airspeed instrument is effectively showing the pressure difference between the dynamic pressure from the pitot and the static pressure). Link to comment Share on other sites More sharing options...
CT2K Posted March 21, 2019 Author Report Share Posted March 21, 2019 Will have a look in the very bottom of the fuselage. Many thanks. Link to comment Share on other sites More sharing options...
SkyrangerRich Posted March 21, 2019 Report Share Posted March 21, 2019 I've got my instrument panel out currently, and will be in the hangar tomorrow, let me know if you would find any pictures useful. Link to comment Share on other sites More sharing options...
CT2K Posted March 23, 2019 Author Report Share Posted March 23, 2019 Sorry for the delay. Any pictures would be very useful because I can’t find the static port on my CT. Today I went to the hangar, unscrewed the instrument panel and looked behind to discover that the altimeter is not connected to anything and didn’t find’ anything that looks lîke a static port. Please help with some pictures of your statics. Link to comment Share on other sites More sharing options...
Ed Cesnalis Posted March 23, 2019 Report Share Posted March 23, 2019 57 minutes ago, CT2K said: I went to the hangar, unscrewed the instrument panel and looked behind to discover that the altimeter is not connected to anything That's not good, does it work? Link to comment Share on other sites More sharing options...
Jacques Posted March 23, 2019 Report Share Posted March 23, 2019 here is my installation. I had no static port when I got the plane new in 2005. It was sent to me later. It goes form the port to the altimeter and the ASI. I had to chnage the port orientation many time to find the best 'orientation' ( precision) some discussion few ago Link to comment Share on other sites More sharing options...
Roger Lee Posted March 23, 2019 Report Share Posted March 23, 2019 The picture above is like all the other CT's. Jacques, yours looks like it is sideways in the picture? We had this discussion back in 2007 and FD said it was to face forward. The dam (raised side) on that port is supposed to face forward. Any other direction affects the readings. Most that I have ever seen all face forward. Link to comment Share on other sites More sharing options...
CT2K Posted March 23, 2019 Author Report Share Posted March 23, 2019 1 hour ago, Ed Cesnalis said: That's not good, does it work? interestingly the altimeter has always worked fine since I got the plane 3 years ago, and still does although not connected to anything. The same goes for the Vario (vertical speed indicator): it is not connected to anything and works just fine. @Jacques: Bonjour Mr Jacques. Long time no hear. Nice to see your comment and thanks for the pics, it’s only now that I SEEL what à static port looks like on the CT. Well, I don’t seem to have this port. Link to comment Share on other sites More sharing options...
Jacques Posted March 23, 2019 Report Share Posted March 23, 2019 Yes, it is sideways. First, I installed it forward....reading way too fast,, so tried different orientation and this one was the closest to reality but still reading a bit too fast. Maybe , it is the location, mine is below the left floor compartment. [ As per instruction if I recall well ] . Some years later, a new maintenance manual came out ( Nov 2008) and it says ', ''between the main gear legs '' . ' Might' play with it next summer.. Link to comment Share on other sites More sharing options...
Jacques Posted March 23, 2019 Report Share Posted March 23, 2019 5 minutes ago, CT2K said: ..... thanks for the pics, it’s only now that I SEE what a static port looks like on the CT. Well, I don’t seem to have this port. here is a screen shot form the 2008 manual Link to comment Share on other sites More sharing options...
Roger Lee Posted March 23, 2019 Report Share Posted March 23, 2019 It is mounted on all the other CT's in the rear center part of the belly. Link to comment Share on other sites More sharing options...
Tom Baker Posted March 24, 2019 Report Share Posted March 24, 2019 1 hour ago, CT2K said: interestingly the altimeter has always worked fine since I got the plane 3 years ago, and still does although not connected to anything. The same goes for the Vario (vertical speed indicator): it is not connected to anything and works just fine. @Jacques: Bonjour Mr Jacques. Long time no hear. Nice to see your comment and thanks for the pics, it’s only now that I SEEL what à static port looks like on the CT. Well, I don’t seem to have this port. The altimeter will work fine to an extent. Due to the shape of the fuselage and how the air flows around it the pressure in the cabin is likely less than static pressure. That is the reason for the external static source. FD should have done flight testing with test equipment to dtermine the location for the port in a nuetral pressure area. Your altimeter in flight likely indicates an altitude that is actually higher than you are. Link to comment Share on other sites More sharing options...
Mike Koerner Posted March 24, 2019 Report Share Posted March 24, 2019 CT2k, As another data point, my CT2k, manufactured in 2004, has no external static port either. The static ports on my altimeter, airspeed indicator, EFIS and transponder mode c encoder are all open. They see cabin pressure. Tom, You may be right about the resulting static pressure being low. I have never noticed an altitude discrepancy, but I have always felt that my airspeed indicator, though seemingly accurate at low speeds, was a bit optimistic at high speed. There are lots of cabin air leaks including through the firewall electrical wiring hole (which would probably be above static pressure, around the door (below), through the wing root (???), and through the window vent (below if closed, above if open). But the biggest leak of all is undoubtedly the hole in the back of the fuselage, which is certainly below static pressure. I should do some tests to determine the significance of this design; recording indicated altitude as a function of speed while maintaining constant GPS altitude and recording indicated airspeed vs. GPS ground speed with varying speed at a constant heading and altitude. And if the discrepancies are significant, I should do as Jacques has done and add a proper external static port. It would certainly make my bi-annual transponder calibration more straightforward. Mike Koerner Link to comment Share on other sites More sharing options...
Tom Baker Posted March 24, 2019 Report Share Posted March 24, 2019 Mike, All the air leaks would tend to equalize pressure. Often when an airplane has an alternate static source, the procedure for use is to open the vents, and even maybe turn on the heat to help equalize pressure. The reason air flows into the cabin is because the pressure outside the cabin is greater High pressure flows to low pressure. If this is enough to bring the pressure to a static level I don't know, but for most airplanes it is not. Link to comment Share on other sites More sharing options...
CT2K Posted March 24, 2019 Author Report Share Posted March 24, 2019 8 hours ago, Mike Koerner said: As another data point, my CT2k, manufactured in 2004, has no external static port either. The static ports on my altimeter, airspeed indicator, EFIS and transponder mode c encoder are all open. They see cabin pressure. Mike, Many thanks for your input. Given my CT2K is similar to yours in that way, I will install my AvMap Ultra EFIS without connection to a static since there is none, I will just leave that entry open. Is your EFIS behaving properly and giving you satisfaction despite the absence of a static port? Link to comment Share on other sites More sharing options...
Mike Koerner Posted March 24, 2019 Report Share Posted March 24, 2019 CT2K, It seems to work fine. Like I said, I should do some testing. Mike Koerner Link to comment Share on other sites More sharing options...
Roger Lee Posted March 25, 2019 Report Share Posted March 25, 2019 That's the way they used to do it on those models. Link to comment Share on other sites More sharing options...
CT2K Posted March 25, 2019 Author Report Share Posted March 25, 2019 I guess there should be at least some net-like fitting that can be used over EFIS static opening to prevent a spider or a bug from housing there Link to comment Share on other sites More sharing options...
CT2K Posted March 26, 2019 Author Report Share Posted March 26, 2019 Looking for someting like this (sth netted) to cap over the EFIS input where there will be no connection to static port. Should you come across sth like this please share the link Link to comment Share on other sites More sharing options...
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