Original Posted By: Ken Chambers
Oscar,Check your email.--------Semper Fi,Terry HandAthens, GARead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sun, 27 Mar 2016 20:16:31 -0500Subject: Pietenpol-List: Riblett 613.5 plans
Pietenpol-List: Riblett 613.5 plans
Pietenpol-List: Re: Riblett 613.5 plans
Original Posted By: Jim Boyer
Ken,In this day of internet and email, I can't imagine why anyone would need to mailyou a copy of the airfoil. Also, it can be found in numerous websites as mattersof public record.Here is the copy I made for my ribs. Notice that there is no angle built in. Bythat I mean the spars and verticals are perpendicular to the chord line.This is a full sized copy, and can be taken down to your local Kinko's and printedon their big printing machine for a couple of bucks a copy.It is free for anyone to use, but obviously done so at your own risk, much likeeverything else in experimental aviation.--------Semper Fi,Terry HandAthens, GARead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/ribl ... ______Date: Mon, 28 Mar 2016 18:12:38 +0000 (UTC)
Ken,In this day of internet and email, I can't imagine why anyone would need to mailyou a copy of the airfoil. Also, it can be found in numerous websites as mattersof public record.Here is the copy I made for my ribs. Notice that there is no angle built in. Bythat I mean the spars and verticals are perpendicular to the chord line.This is a full sized copy, and can be taken down to your local Kinko's and printedon their big printing machine for a couple of bucks a copy.It is free for anyone to use, but obviously done so at your own risk, much likeeverything else in experimental aviation.--------Semper Fi,Terry HandAthens, GARead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/ribl ... ______Date: Mon, 28 Mar 2016 18:12:38 +0000 (UTC)
Re: Pietenpol-List: Re: Riblett 613.5 plans
Original Posted By: Tony Crawford
Subject: Re: Pietenpol-List: Re: Riblett 613.5 plans
Subject: Re: Pietenpol-List: Re: Riblett 613.5 plans
Pietenpol-List: Re: Riblett 613.5 plans
Original Posted By: "Douwe Blumberg"
Reading the thread about the Riblett airfoil, I went back to the archives and searchedon 'Riblett' and got almost 700 posts, so it's been discussed quite abit. I was looking specifically for how and why we ended up with the 613.5 ratherthan the 612 and found that I had made a few posts on the subject myself.I don't know the answer to why the 613.5 came to be (roughly 13.5% thicknessairfoil, 8" deep, rather than 12% or about 7-1/4" thickness), but whatever thecase, it's been test-flown and the performance was documented by P.F. Beck ina post to this list and in a writeup in the BPA Newsletter. When P.F. concludedthat there was very little apparent difference in performance between theRiblett and the Piet airfoil, various comments were made about how it may nothave been a fair test but that's not worth bringing up. I will, however, cutand paste my response to P.F.'s post:"I wouldn't say that there is little to no benefit of using the Riblett. Here'sa snip from a post that I made in May of 2008 on the subject:"The Riblett "612" airfoil is very similar to the NACA 4412 airfoil that has also been discussed here. Both of those airfoils are deeper than the Pietenpol, allowing for lighter spars and ribs, increased volume where a fuel tank can go in the wing, and both of them have less undercamber than the Pietenpol airfoil. With a 60" chord, a 12% airfoil is a bit over 7" deep as compared with the Pietenpol at 4" deep. There is an image of the NACA and Riblett airfoils at http://www.flysquirrel.net/piets/airfoils.jpg"I wanted to point out that Terry mentions the spars and rib verticals being perpendicularto the chord line, with no angle built in. If you take the Riblettairfoil outline and lay it over the Pietenpol rib drawing, you'll soon be scratchingyour head about how to make the Riblett fit the spar spacing and how thechord line should be laid out relative to the airplane's longerons. Bill Churchposted an excellent statement of the angle of incidence comparison in apost in July of 2014. Needless to say, then, when you change to the Riblett airfoil,there are various adjustments that need to be made. It's not exactly"swap and go fly".--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Reading the thread about the Riblett airfoil, I went back to the archives and searchedon 'Riblett' and got almost 700 posts, so it's been discussed quite abit. I was looking specifically for how and why we ended up with the 613.5 ratherthan the 612 and found that I had made a few posts on the subject myself.I don't know the answer to why the 613.5 came to be (roughly 13.5% thicknessairfoil, 8" deep, rather than 12% or about 7-1/4" thickness), but whatever thecase, it's been test-flown and the performance was documented by P.F. Beck ina post to this list and in a writeup in the BPA Newsletter. When P.F. concludedthat there was very little apparent difference in performance between theRiblett and the Piet airfoil, various comments were made about how it may nothave been a fair test but that's not worth bringing up. I will, however, cutand paste my response to P.F.'s post:"I wouldn't say that there is little to no benefit of using the Riblett. Here'sa snip from a post that I made in May of 2008 on the subject:"The Riblett "612" airfoil is very similar to the NACA 4412 airfoil that has also been discussed here. Both of those airfoils are deeper than the Pietenpol, allowing for lighter spars and ribs, increased volume where a fuel tank can go in the wing, and both of them have less undercamber than the Pietenpol airfoil. With a 60" chord, a 12% airfoil is a bit over 7" deep as compared with the Pietenpol at 4" deep. There is an image of the NACA and Riblett airfoils at http://www.flysquirrel.net/piets/airfoils.jpg"I wanted to point out that Terry mentions the spars and rib verticals being perpendicularto the chord line, with no angle built in. If you take the Riblettairfoil outline and lay it over the Pietenpol rib drawing, you'll soon be scratchingyour head about how to make the Riblett fit the spar spacing and how thechord line should be laid out relative to the airplane's longerons. Bill Churchposted an excellent statement of the angle of incidence comparison in apost in July of 2014. Needless to say, then, when you change to the Riblett airfoil,there are various adjustments that need to be made. It's not exactly"swap and go fly".--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Pietenpol-List: Re: Riblett 613.5 plans
Original Posted By: "taildrags"
Hello PietpleLooking for Frank Metcalfe's contact information. I am going to be flying into the West Georgia Regional airport on Friday where EAA chapter 976 is based and saw his Piet as well as a few other nice ones on their website.ThanksCharles________________________________________________________________________________Subject: Pietenpol-List: Re: Riblett 613.5 plans
Hello PietpleLooking for Frank Metcalfe's contact information. I am going to be flying into the West Georgia Regional airport on Friday where EAA chapter 976 is based and saw his Piet as well as a few other nice ones on their website.ThanksCharles________________________________________________________________________________Subject: Pietenpol-List: Re: Riblett 613.5 plans
Original Posted By: Ray Krause
I thought I had posted this last night, but it doesn't seem to have shown up. I did a quick overlay of the Riblett 612 airfoil over the Piet rib with the sparsvertical and in register with the Piet spar locations, just to see how thetwo compare. Draw your own conclusions... this is offered purely as matter forthought and discussion.--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/airf ... __________
I thought I had posted this last night, but it doesn't seem to have shown up. I did a quick overlay of the Riblett 612 airfoil over the Piet rib with the sparsvertical and in register with the Piet spar locations, just to see how thetwo compare. Draw your own conclusions... this is offered purely as matter forthought and discussion.--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/airf ... __________
Pietenpol-List: Re: Riblett 613.5 plans
Original Posted By: "tonyp51qa"
The C-90 is the very best of all the cont engines. To find a dash 8 is like findingHens teeth. You have great hunting skills.--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Riblett 613.5 plans
The C-90 is the very best of all the cont engines. To find a dash 8 is like findingHens teeth. You have great hunting skills.--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Riblett 613.5 plans
Original Posted By: Steven Dortch
Hello Terry,I still cannot open the RIBLET attachment. It says URL NOT FOUND! Can you assist???Thanks,Tony--------Tony CrawfordRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Hello Terry,I still cannot open the RIBLET attachment. It says URL NOT FOUND! Can you assist???Thanks,Tony--------Tony CrawfordRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Pietenpol-List: Re: Riblett 613.5 plans
Original Posted By: Bruce Kirk
Tony,I have created a link for you to go to download the jpeg file. If I upload it directlyhere it seems to make my screen go five foot wide, since the file is thatwide.Here ya go. Use at your own risk. No warranty implied. may suddenly accelerateto dangerous speeds. Contains a liquid core, which, if exposed due to rupture,should not be touched, inhaled, or looked at. Do not use on concrete. Discontinue use if any of the following occurs: itching, vertigo, dizziness, tinglingin extremities, loss of balance or coordination, slurred speech, temporaryblindness, profuse sweating, or heart palpitations. If jpeg begins to smoke,get away immediately. Seek shelter and cover head. Riblett 613.5 rib jig drawing -https://drive.google.com/file/d/0B4iLvE ... ----Semper Fi,Terry HandAthens, GARead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sat, 2 Apr 2016 04:16:45 +0000 (UTC)
Tony,I have created a link for you to go to download the jpeg file. If I upload it directlyhere it seems to make my screen go five foot wide, since the file is thatwide.Here ya go. Use at your own risk. No warranty implied. may suddenly accelerateto dangerous speeds. Contains a liquid core, which, if exposed due to rupture,should not be touched, inhaled, or looked at. Do not use on concrete. Discontinue use if any of the following occurs: itching, vertigo, dizziness, tinglingin extremities, loss of balance or coordination, slurred speech, temporaryblindness, profuse sweating, or heart palpitations. If jpeg begins to smoke,get away immediately. Seek shelter and cover head. Riblett 613.5 rib jig drawing -https://drive.google.com/file/d/0B4iLvE ... ----Semper Fi,Terry HandAthens, GARead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sat, 2 Apr 2016 04:16:45 +0000 (UTC)