From: To: Subject: krnet Digest 3 Oct 2001 17:23:40 -0000 Issue 302 Date: Wednesday, October 03, 2001 10:24 AM krnet Digest 3 Oct 2001 17:23:40 -0000 Issue 302 Topics (messages 7219 through 7243): Re: Pitot Tube 7219 by: cartera 7220 by: virgnvs.juno.com 7222 by: Oscar Zuniga 7227 by: Ross R. Youngblood 7230 by: RONALD.FREIBERGER 7231 by: Guenther Bryce 7232 by: Jerry Mahurin 7243 by: Bobby Muse Com radio 7221 by: Kenneth L Wiltrout Re: 2001 Gathering! 7223 by: Ross R. Youngblood Re: Tri-gear weight and balance 7224 by: Ross R. Youngblood Re: Nyrod routing question 7225 by: Ross R. Youngblood 7229 by: Gognij.aol.com Re: the floor 7226 by: Ross R. Youngblood Push/Pull KR 7228 by: Ross R. Youngblood 2001 gathering photos 7233 by: ROBERT COOPER 7235 by: Edwin Blocher 7236 by: Jerry Mahurin glass 7234 by: dene.collett Article In Kitplanes 7237 by: Mark Jones 7242 by: John Esch 2001 KR gathering photos 7238 by: ROBERT COOPER 7240 by: Jerry Mahurin 7241 by: BillStarrs More pictures from Pine Bluff Gathering.... 7239 by: Jerry Mahurin Administrivia: To subscribe to the digest, e-mail: To unsubscribe from the digest, e-mail: To post to the list, e-mail: ---------------------------------------------------------------------- Date: Mon, 01 Oct 2001 11:02:47 -0600 To: Jim Morehead From: cartera CC: KR- Net Subject: Re: KR> Pitot Tube Message-ID: <3BB8A1B7.4F29F453@cuug.ab.ca> Jim and NetHeads, No advantage as a matter of fact it is a disadvantage, you have air separation before the leading edge, better to place it under the wing. My experience was a I put out my pitot and static out the leading edge about 10" and on my first flight, A/S went up to 40 mph and stayed there. Now this was my first flight, unfamiliar with the KR and only be able to judge speed from experience. Upon landing I was guessmating we have a 12k runway with the tower about mid way I was still flying as I passed the control tower, then when I touched down went from one side to the other on a 200 wide runway. When I got back to my hanger, the first thing is did was cut out the pitot/static and placed it under the wing, no problems since. No never out the leading edge unless you want to stick it out about 2 feet. And, why do you want to remove it once you have it in a proper place? But, it's your airplane! Jim Morehead wrote: > > Hi Net heads, > > I have a question on the pitot tube. Page 74 of the RR plan book shows > the pitot tube made out of 1/4² aluminum tubing. Is this regular hardware > store aluminum tubing? Is there an advantage of mounting it through the > leading edge of the wing? And any ideas on how to make make it removable. > > Thanks, > Jim Morehead > Cameron Park, CA > -- Adrian VE6AFY Calgary, Alberta Mailto:cartera@cuug.ab.ca http://www.cuug.ab.ca/~cartera ------------------------------ Date: Mon, 1 Oct 2001 15:05:32 -0400 To: cartera@cuug.ab.ca From: virgnvs@juno.com Cc: kr2jm@d-web.com, krnet@mailinglists.org Subject: Re: KR> Pitot Tube Message-ID: <20011001.151314.-100735.3.virgnvs@juno.com> The pitot tube gets knocked awry by people walking in front of the wing, Virg ------------------------------ Date: Tue, 02 Oct 2001 00:16:11 To: krnet@mailinglists.org From: "Oscar Zuniga" Subject: pitot tube Message-ID: Jim wrote: >Page 74 of the RR plan book shows the pitot tube made out of >1/4=B2 aluminum tubing. Is this regular hardware store aluminum >tubing? I don't see why not. It's not structural. >Is there an advantage of mounting it through the leading edge of >the wing? And any ideas on how to make make it removable. That's how Paul Martin had his installed. He had a section of tubing, the ram tube, removable by slipping into a snug-fit larger tube embedded in the wing LE. Not sure if that's the best placement for getting accurate ASI readings since it's supposed to sense undisturbed air, but his was about 8" long and seems like it was just about at the most forward point on the LE of the pilot's side wing. He made it removable because the KR sits so low that it is almost a certainty that it will get clipped off as people (or the pilot) walks in front of the wing, so he added a preflight item to "install pitot tube". I don't know where he was sensing static, but that can be anywhere that there's 'neutral' pressure. Oscar Zuniga Medford, Oregon mailto: taildrags@hotmail.com website at http://www.geocities.com/taildrags/ _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp ------------------------------ Date: Mon, 01 Oct 2001 18:07:13 -0700 From: "Ross R. Youngblood" CC: Jim Morehead , KR- Net Subject: Re: KR> Pitot Tube Message-ID: <3BB91341.52B44A0F@home.com> Jim, Aircraft Spruce has a nifty Pitot/Static tube they sell for about $16.00 it mounts with four screws, and is therefore removeable if you make a mount for it. I have secured the static/pitot line with hose clamps but it's probably overkill. -- Ross Jim Morehead wrote: > Hi Net heads, > > I have a question on the pitot tube. Page 74 of the RR plan book shows > the pitot tube made out of 1/4² aluminum tubing. Is this regular hardware > store aluminum tubing? Is there an advantage of mounting it through the > leading edge of the wing? And any ideas on how to make make it removable. > > Thanks, > Jim Morehead > Cameron Park, CA > > My wife and I had a great trip to Pine Bluff, looking forward to Iowa. > > --------------------------------------------------------------------- > To post to the list, email: krnet@mailinglists.org , or "reply all" > > To UNsubscribe, e-mail: krnet-unsubscribe@mailinglists.org > For additional commands, e-mail: krnet-help@mailinglists.org > > See the KRNet archives at http://www.escribe.com/aviation/krnet/ . > AOL and Compuserve do NOT pass KRNet email, so use some other system! ------------------------------ Date: Tue, 2 Oct 2001 10:25:19 -0400 To: "KRNET" , "Oscar Zuniga" From: "RONALD.FREIBERGER" Subject: RE: KR> pitot tube Message-ID: Oscar said " I don't know where he was sensing static, but that can be anywhere that there's 'neutral' pressure." Now, that's the trick, isn't it? Ron Freiberger... mailto:ron.martha@mindspring.com -----Original Message----- From: Oscar Zuniga [mailto:taildrags@hotmail.com] Sent: Tuesday, October 02, 2001 12:16 AM To: krnet@mailinglists.org Subject: KR> pitot tube Jim wrote: >Page 74 of the RR plan book shows the pitot tube made out of >1/4=B2 aluminum tubing. Is this regular hardware store aluminum >tubing? I don't see why not. It's not structural. >Is there an advantage of mounting it through the leading edge of >the wing? And any ideas on how to make make it removable. That's how Paul Martin had his installed. He had a section of tubing, the ram tube, removable by slipping into a snug-fit larger tube embedded in the wing LE. Not sure if that's the best placement for getting accurate ASI readings since it's supposed to sense undisturbed air, but his was about 8" long and seems like it was just about at the most forward point on the LE of the pilot's side wing. He made it removable because the KR sits so low that it is almost a certainty that it will get clipped off as people (or the pilot) walks in front of the wing, so he added a preflight item to "install pitot tube". I don't know where he was sensing static, but that can be anywhere that there's 'neutral' pressure. Oscar Zuniga Medford, Oregon mailto: taildrags@hotmail.com website at http://www.geocities.com/taildrags/ _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp --------------------------------------------------------------------- To post to the list, email: krnet@mailinglists.org , or "reply all" To UNsubscribe, e-mail: krnet-unsubscribe@mailinglists.org For additional commands, e-mail: krnet-help@mailinglists.org See the KRNet archives at http://www.escribe.com/aviation/krnet/ . AOL and Compuserve do NOT pass KRNet email, so use some other system! ------------------------------ Date: Tue, 2 Oct 2001 09:05:06 -0700 (PDT) To: ron.martha@mindspring.com, KRNET , Oscar Zuniga From: Guenther Bryce Subject: RE: KR> pitot tube Message-ID: <20011002160506.10757.qmail@web11107.mail.yahoo.com> Pitot & Static Topic The atmospheric pressure where ever the aircraft is at is the Static pressure desired. The differential pressure obtained via Pitot pressure operates the A.S. indicator as we all know. Static pressure accuracy is very important to interpret what the AC actually is doing. Needle, Ball & _A.S._ thats one of the three. Imagine the confusion the pilot has on his first flight if the A.S. in error causes pilotage error. How simple yet how important is the Pitot-Static installation. The topic of Pitot installation has been covered here well yet just for completeness the Static can also. The boundary layer air location point is generally acceptable if it is perpendicular to airflow that is not turbulent or subject to change due to aircraft attitude. To avoid searching for that location many P/S installations rout a parallel 1/4 tube to the Pitot tube and plug the hole in the end facing the airflow and drill many small holes into that Static 1/4 tube thus accomodating boundary layer pressure point on something other than the external surface of the airframe. Bryce Guenther AE, A&P, KR builder & owner --- "RONALD.FREIBERGER" wrote: > Oscar said " I don't know where he was sensing > static, but that can be > anywhere that there's 'neutral' pressure." > > Now, that's the trick, isn't it? > > > > Ron Freiberger... > mailto:ron.martha@mindspring.com > > > -----Original Message----- > From: Oscar Zuniga [mailto:taildrags@hotmail.com] > Sent: Tuesday, October 02, 2001 12:16 AM > To: krnet@mailinglists.org > Subject: KR> pitot tube > > > Jim wrote: > >Page 74 of the RR plan book shows the pitot tube > made out of > >1/4=B2 aluminum tubing. Is this regular hardware > store aluminum > >tubing? > > I don't see why not. It's not structural. > > >Is there an advantage of mounting it through the > leading edge of > >the wing? And any ideas on how to make make it > removable. > > That's how Paul Martin had his installed. He had a > section of tubing, the > ram tube, removable by slipping into a snug-fit > larger tube embedded in the > wing LE. Not sure if that's the best placement for > getting accurate ASI > readings since it's supposed to sense undisturbed > air, but his was about 8" > long and seems like it was just about at the most > forward point on the LE of > the pilot's side wing. He made it removable because > the KR sits so low that > it is almost a certainty that it will get clipped > off as people (or the > pilot) walks in front of the wing, so he added a > preflight item to "install > pitot tube". I don't know where he was sensing > static, but that can be > anywhere that there's 'neutral' pressure. > > Oscar Zuniga > Medford, Oregon > mailto: taildrags@hotmail.com > website at http://www.geocities.com/taildrags/ > > > _________________________________________________________________ > Get your FREE download of MSN Explorer at > http://explorer.msn.com/intl.asp > > > --------------------------------------------------------------------- > To post to the list, email: krnet@mailinglists.org , > or "reply all" > > To UNsubscribe, e-mail: > krnet-unsubscribe@mailinglists.org > For additional commands, e-mail: > krnet-help@mailinglists.org > > See the KRNet archives at > http://www.escribe.com/aviation/krnet/ . > AOL and Compuserve do NOT pass KRNet email, so use > some other system! > > > --------------------------------------------------------------------- > To post to the list, email: krnet@mailinglists.org , > or "reply all" > > To UNsubscribe, e-mail: > krnet-unsubscribe@mailinglists.org > For additional commands, e-mail: > krnet-help@mailinglists.org > > See the KRNet archives at > http://www.escribe.com/aviation/krnet/ . > AOL and Compuserve do NOT pass KRNet email, so use > some other system! > __________________________________________________ Do You Yahoo!? Listen to your Yahoo! Mail messages from any phone. http://phone.yahoo.com ------------------------------ Date: Tue, 02 Oct 2001 12:12:24 -0400 To: ,"KRNET" , "Oscar Zuniga" From: "Jerry Mahurin" Subject: Re: KR> pitot tube Message-ID: Netters, At the risk of opening up a real can of worms..... I just leave the static line off. Is not the air in the cockpit neutral; or do you have a pressurized KR. The only other problem is if you had your cabin vent blowing on the back of the instruments. But I have built more than one plane with no 'static source'. Jerry Mahurin Lugoff, SC On Tue, 2 Oct 2001 10:25:19 -0400 "RONALD.FREIBERGER" wrote: > Oscar said " I don't know where he was sensing static, > but that can be > anywhere that there's 'neutral' pressure." > > Now, that's the trick, isn't it? > > > > Ron Freiberger... > mailto:ron.martha@mindspring.com > > > -----Original Message----- > From: Oscar Zuniga [mailto:taildrags@hotmail.com] > Sent: Tuesday, October 02, 2001 12:16 AM > To: krnet@mailinglists.org > Subject: KR> pitot tube > > > Jim wrote: > >Page 74 of the RR plan book shows the pitot tube made > out of > >1/4=B2 aluminum tubing. Is this regular hardware store > aluminum > >tubing? > > I don't see why not. It's not structural. > > >Is there an advantage of mounting it through the leading > edge of > >the wing? And any ideas on how to make make it > removable. > > That's how Paul Martin had his installed. He had a > section of tubing, the > ram tube, removable by slipping into a snug-fit larger > tube embedded in the > wing LE. Not sure if that's the best placement for > getting accurate ASI > readings since it's supposed to sense undisturbed air, > but his was about 8" > long and seems like it was just about at the most forward > point on the LE of > the pilot's side wing. He made it removable because the > KR sits so low that > it is almost a certainty that it will get clipped off as > people (or the > pilot) walks in front of the wing, so he added a > preflight item to "install > pitot tube". I don't know where he was sensing static, > but that can be > anywhere that there's 'neutral' pressure. > > Oscar Zuniga > Medford, Oregon > mailto: taildrags@hotmail.com > website at http://www.geocities.com/taildrags/ > > > _________________________________________________________________ > Get your FREE download of MSN Explorer at > http://explorer.msn.com/intl.asp > > > --------------------------------------------------------------------- > To post to the list, email: krnet@mailinglists.org , or > "reply all" > > To UNsubscribe, e-mail: krnet-unsubscribe@mailinglists.org > For additional commands, e-mail: > krnet-help@mailinglists.org > > See the KRNet archives at http://www.escribe.com/aviation/krnet/ > . > AOL and Compuserve do NOT pass KRNet email, so use some > other system! > > > --------------------------------------------------------------------- > To post to the list, email: krnet@mailinglists.org , or > "reply all" > > To UNsubscribe, e-mail: krnet-unsubscribe@mailinglists.org > For additional commands, e-mail: > krnet-help@mailinglists.org > > See the KRNet archives at http://www.escribe.com/aviation/krnet/ > . > AOL and Compuserve do NOT pass KRNet email, so use some > other system! >