KR> Pitot / static tube.
Oscar Zuniga wrote: .>The only such image I could find in a quick search of the KRNet.org site was the very first one, here: http://www.krnet.org/as504x/ . It's not very definite. I thought there were a whole series of such images, from level cruise to past full stall. Mark-?<< Yep, I should have them, being a packrat, but I haven't seen them in a very long time. When I wrote the AS504x website, I only put the most dramatic and important one there, the 16 degree at stall. OK, the search of my 2TB drive is done, and I have them all! The zero degree one is at http://www.krnet.org/as504x/00deg.jpg. It does tell the story of where the undisturbed air is. My two cents worth is that I essentially followed the plans and put mine at the stub wing joint, hanging down about four inches (100mm) with tips right at the leading edge to prevent damage from folks standing at the leading edge. It turns out that was the most likely candidate to bend the thing, as I routinely stand right there to refuel the aux wing tank. Another inch (25mm) aft would have been even better. There's a photo of it at the top of http://www.n56ml.com/fairings.html, along with several others. I don't have a picture of the final fairing, but it turned out very aerodynamic-looking in the end. You can sort of see it in front of the left gear leg in the second photo down at http://www.n56ml.com/ . Like several other folks have reported this one was accurate with about 1 to 1.5 mph across most of the flying range, except below 90 mph it started gradually diverging to the point that it was off by about 8 mph at stall speed, reading higher speeds than reality. Mark Langford ML at N56ML.com website at http://www.N56ML.com
KR> Pitot / static tube.
Kr friends, Thanks for your response, One of the Dutch pilots flyes with à copy of the Tony B. Books. Installed the tubes in front of the main spar. I want to copy it but we have the leadingedge fuel tanks at that position. So we are not able to come out the wing at that position. I was in à doubt to come out off the wing just after the FwD spar.And extend the tubes 1 fwd spar. My kr friend from all over the world make up my mind..I Will leave it like the Dutch kr friend and put is just after the fwd spar. Thanks everybody. Stef Stef and Ted are building the KR-2S see http://www.masttotaalconcept.nl/kr2 -Oorspronkelijk bericht- Van: krnet-boun...@mylist.net namens Larry&Sallie Flesner Verzonden: do 13-12-2012 5:32 Aan: KRnet Onderwerp: KR> Pitot / static tube. >. We will install the tubes on the most ouboard point of the stubwing. >My question is.wat is the dimension from the front of the >leading egde to the front of the tubes. >Stef. +++ Stef, I would not bother to extend the lead edge of the pitot/static ahead of the lead edge. It only increases the opportunity for them to get damaged by accident. I built the very simple system as suggested in the KR plans, the same as suggested in other posts. The assembly is mounted just outside the propeller arc in the outboard wing panel. They extend approx. 6 inches below the wing and the lead edge of the tubes are nearly in line with the lead edge of the wing. Flying in a number of "no wind" conditions in the last 460 hours, the system seems to be accurate to within 1 or 2 miles per hour as compared to the GPS ground speed. Don't waste time trying to re-invert the wheel. Others have tried to find other static port locations on the aircraft but I don't see any way they will find a better location then the setup suggested in the plans. The critical part is to keep the tubes aligned parallel to the longitudinal axis of the airplane. Keep it simple and go fly. Larry Flesner ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Pitot / static tube.
>. We will install the tubes on the most ouboard point of the stubwing. >My question is.wat is the dimension from the front of the >leading egde to the front of the tubes. >Stef. +++ Stef, I would not bother to extend the lead edge of the pitot/static ahead of the lead edge. It only increases the opportunity for them to get damaged by accident. I built the very simple system as suggested in the KR plans, the same as suggested in other posts. The assembly is mounted just outside the propeller arc in the outboard wing panel. They extend approx. 6 inches below the wing and the lead edge of the tubes are nearly in line with the lead edge of the wing. Flying in a number of "no wind" conditions in the last 460 hours, the system seems to be accurate to within 1 or 2 miles per hour as compared to the GPS ground speed. Don't waste time trying to re-invert the wheel. Others have tried to find other static port locations on the aircraft but I don't see any way they will find a better location then the setup suggested in the plans. The critical part is to keep the tubes aligned parallel to the longitudinal axis of the airplane. Keep it simple and go fly. Larry Flesner
KR> Pitot / static tube.
That's the catch... Because it is 'out of disturbed air', it depends on the design of each individual pitot... For example, my piper-style blade pitot has to extend further down, to make up for the fact that it doesn't extend forward at all... On 12/12/2012 8:01 PM, Oscar Zuniga wrote: > I believe Stef is asking how far forward the tubes should protrude. > Certainly ahead of any disturbed air, but how far is that? Perhaps we can > refer to the nice colored CFD simulations that were developed when the new > airfoils were developed, and guesstimate how far forward the tubes need to be > as a fraction of wing chord? The only such image I could find in a quick > search of the KRNet.org site was the very first one, here: > http://www.krnet.org/as504x/ . It's not very definite. I thought there were > a whole series of such images, from level cruise to past full stall. Mark-? > > Oscar Zuniga > Medford, OR > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
KR> Pitot / static tube.
I believe Stef is asking how far forward the tubes should protrude. Certainly ahead of any disturbed air, but how far is that? Perhaps we can refer to the nice colored CFD simulations that were developed when the new airfoils were developed, and guesstimate how far forward the tubes need to be as a fraction of wing chord? The only such image I could find in a quick search of the KRNet.org site was the very first one, here: http://www.krnet.org/as504x/ . It's not very definite. I thought there were a whole series of such images, from level cruise to past full stall. Mark-? Oscar Zuniga Medford, OR
KR> Pitot / static tube.
Logically, the tube should be mounted to the thickest part of the wing, to ensure the lowest opening-position relative to the airstream On 12/12/2012 4:40 AM, stef...@kpnmail.nl wrote: > Kr friends, > I found in the Books of Tony Bingelis useful information about the static and > pitot tube. We will install the tubes on the most ouboard point of the > stubwing. My question is.wat is the dimension from the front of the > leading egde to the front of the tubes. > Hope you can give us some useful info. > > Stef. > > Stef and Ted are building the KR-2S see > http://www.masttotaalconcept.nl/kr2 > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
KR> Pitot / static tube.
Craig, Thanks,but this s exactly the Same info I already have. But thanks for your response. Stef Stef and Ted are building the KR-2S see http://www.masttotaalconcept.nl/kr2 -Oorspronkelijk bericht- Van: krnet-boun...@mylist.net namens Craig Williams Verzonden: wo 12-12-2012 14:40 Aan: KRnet Onderwerp: Re: KR> Pitot / static tube. Maybe this will help you. http://www.ch601.org/resources/pitot-static/pitot.htm Craig From: "stef...@kpnmail.nl" To: kr net Sent: Wednesday, December 12, 2012 7:40 AM Subject: KR> Pitot / static tube. Kr friends, I found in the Books of Tony Bingelis useful information about the static and pitot tube. We will install the tubes on the most ouboard point of the stubwing. My question is.wat is the dimension from the front of the leading egde to the front of the tubes. Hope you can give us some useful info. Stef. Stef and Ted are building the KR-2S see http://www.masttotaalconcept.nl/kr2 ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Pitot / static tube.
I don't put it in the stub wing. In the outboard wing, just in front of the spar. See the pictures. I built 2 KR2 and did it the same on both and both came out right. Static, about 10 thumbnails from the bottom. http://krbuilder.org/CockpitWork/index.html Pitot tube, scroll down about 1/3rd of a page. http://krbuilder.org/index.html If after looking at this, you care to pursue a different installation and need numbers, let me know. See N64KR at http://KRBuilder.org - Then click on the pics See you at the 2013 - KR Gathering in Mt. Vernon, Il MVN Bad Weather at Gathering time, is a killer or a real bummer. Daniel R. Heath - Lexington, SC -Original Message- We will install the tubes on the most ouboard point of the stubwing.
KR> Pitot / static tube.
Maybe this will help you. http://www.ch601.org/resources/pitot-static/pitot.htm Craig From: "stef...@kpnmail.nl" To: kr net Sent: Wednesday, December 12, 2012 7:40 AM Subject: KR> Pitot / static tube. Kr friends, I found in the Books of Tony Bingelis useful information about the static and pitot tube. We will install the tubes on the most ouboard point of the stubwing. My question is.wat is the dimension from the front of the leading egde to the front of the tubes. Hope you can give us some useful info. Stef. Stef and Ted are building the KR-2S see http://www.masttotaalconcept.nl/kr2 ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Pitot / static tube.
Kr friends, I found in the Books of Tony Bingelis useful information about the static and pitot tube. We will install the tubes on the most ouboard point of the stubwing. My question is.wat is the dimension from the front of the leading egde to the front of the tubes. Hope you can give us some useful info. Stef. Stef and Ted are building the KR-2S see http://www.masttotaalconcept.nl/kr2
