Original Posted By: "biplan53"
--> Pietenpol-List message posted by: "Don Emch" I'm a dope man. I just really like to work with it. Very easy to repair. Fun to spray. I tried Poly Fiber a while back but everything since then has been dope. Just used to it I guess. Probably the best reason for using dope though, was when my son, in second grade, went to school and told his teacher that he and his Dad were "doing dope in the garage last night..." The phone call was priceless. Also, there is something about the look of hand rubbed dope that is very difficult to replace with any other system. Don Emch NX899DE Read this topic online here: http://forums.matronics.com/viewtopic.p ... 290#404290 Email Forum - - MATRONICS WEB FORUMS - List Contribution Web Site - -Matt Dralle, List Admin.________________________________________________________________________________Subject: Pietenpol-List: Re: A engine out
Pietenpol-List: A engine out
Pietenpol-List: A engine out
Original Posted By: "bender"
Subject: Pietenpol-List: off subject--- 1/3scale B-17 Project to fly soonThis is way cool. Jack Bally of Dixon, Illinois. Jack is a big Pietenpol supporter. I had the pleasure ofmeeting him and his wife about 15 years ago at Brodhead. This project is amazing! I hope he gets to flyit to Oshkosh.Mike C.https://www.facebook.com/BallyBomberOr Google Bally's Bomber________________________________________________________________________________Subject: Pietenpol-List: A engine out
Subject: Pietenpol-List: off subject--- 1/3scale B-17 Project to fly soonThis is way cool. Jack Bally of Dixon, Illinois. Jack is a big Pietenpol supporter. I had the pleasure ofmeeting him and his wife about 15 years ago at Brodhead. This project is amazing! I hope he gets to flyit to Oshkosh.Mike C.https://www.facebook.com/BallyBomberOr Google Bally's Bomber________________________________________________________________________________Subject: Pietenpol-List: A engine out
Pietenpol-List: Re: A engine out
Original Posted By: "bubbleboy"
I found the reason that my engine quit..rear #4 piston melted a bit..Not sure Why.. everything else looks OKNow to fix it..JeffRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/pist ... ___Subject: Pietenpol-List: Re: A engine out
I found the reason that my engine quit..rear #4 piston melted a bit..Not sure Why.. everything else looks OKNow to fix it..JeffRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/pist ... ___Subject: Pietenpol-List: Re: A engine out
Original Posted By:
Thanks for sharing Jeff. What would cause that? Too lean or something else?Scotty--------Tamworth, AustraliaBuilding a Corvair Powered Pietenpol Air Camperwww.scottyspietenpol.comTail and Ribs built...Building fuselage & undercarriage...Corvair engine atRoy's Garage waiting to be modified.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Tue, 9 Jul 2013 17:59:20 -0400
Thanks for sharing Jeff. What would cause that? Too lean or something else?Scotty--------Tamworth, AustraliaBuilding a Corvair Powered Pietenpol Air Camperwww.scottyspietenpol.comTail and Ribs built...Building fuselage & undercarriage...Corvair engine atRoy's Garage waiting to be modified.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Tue, 9 Jul 2013 17:59:20 -0400
Pietenpol-List: Re: A engine out
Original Posted By: "tools"
They look great Ken! I can't wait to get to that stage. I spoke with Stewart Systems today and ordered the 20 dollar DVD set.John--------John FrancisRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: A engine out
They look great Ken! I can't wait to get to that stage. I spoke with Stewart Systems today and ordered the 20 dollar DVD set.John--------John FrancisRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: A engine out
Pietenpol-List: Re: A engine out
Original Posted By: shad bell
Doesn't seem to be a lean problem. . . The guy that built the short block lookedat the photos and said heat or lack of oil. .. or both. . Ring gap was fine.It kinda looks like the shooting started on the lower part of the skirt.My oil pressure was down to 2-3 lbs when this happened. .Modding an oil pump for flow and pressure now. . According to a service bulletinfrom November of 1932JeffRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Tue, 9 Jul 2013 20:28:11 -0700 (PDT)
Doesn't seem to be a lean problem. . . The guy that built the short block lookedat the photos and said heat or lack of oil. .. or both. . Ring gap was fine.It kinda looks like the shooting started on the lower part of the skirt.My oil pressure was down to 2-3 lbs when this happened. .Modding an oil pump for flow and pressure now. . According to a service bulletinfrom November of 1932JeffRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Tue, 9 Jul 2013 20:28:11 -0700 (PDT)
Pietenpol-List: Re: A engine out
Original Posted By: "bender"
Looking at the second ring, above the melted place, there is a lot of metal builtup below the ring. Looks like there was more damage than just at the meltedplace.--------Building steel fuselage aircamper.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: A engine out
Looking at the second ring, above the melted place, there is a lot of metal builtup below the ring. Looks like there was more damage than just at the meltedplace.--------Building steel fuselage aircamper.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: A engine out
Pietenpol-List: Re: A engine out
Original Posted By: "tools"
The metal built up on the ring is from the transfer to the cylinder wall.. itsnot bad... a hone will take it out.. melted aluminum scraped off the wall by thering... most of the "melting" is low on the skirt.. I'm sure its not a mixtureissue.. the top of the piston is fine along with the head and valves.. plugsall look good.this is a service bulletin from ford about oil pumpshttp://www.oldcarmanualproject.com/manuals/For ... tmJeffRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: A engine out
The metal built up on the ring is from the transfer to the cylinder wall.. itsnot bad... a hone will take it out.. melted aluminum scraped off the wall by thering... most of the "melting" is low on the skirt.. I'm sure its not a mixtureissue.. the top of the piston is fine along with the head and valves.. plugsall look good.this is a service bulletin from ford about oil pumpshttp://www.oldcarmanualproject.com/manuals/For ... tmJeffRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: A engine out
Original Posted By: "Cuy, Michael D. (GRC-RXD0)[Vantage Partners, LLC]"
I was thinking a lot about oil pressure too, but was thinking about my tractorsthat do that a lot as well... but then... air plane usage means you're usingall the horsepower available, all the time (unlike my tractor in "retirement"mowing mode). The weakest point is going to go first, and that must have beenthat cylinder. Water cooled engines run less piston/cylinder clearance than air cooled, it must'vejust got hot enough to interfere. You mentioned it wasn't getting quiteup to rpm prior to the failure, must've been the start of the event.Happy to hear you can merely hone the cylinder to get it back to good. What kindof cylinder hone do you use, a parallel rack and pinon stone, exanding parallelstone or ball? I'd recommend the first, which will enlarge the cylindermore, but maintain perfect round. The increased clearance won't hurt a bit. Most manuals don't recommend reboring until your in excess of 0.008 clearanceif the cylinder is within taper and out of round specs (which are FAR less). I'm thinking more might be better running these in airplanes. Probably do need more oil pressure, especially if Ford recommended it for carsback then. Water temp wouldn't likely have showed the problem very obviously.Glad to see you found a likely smoking gun.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
I was thinking a lot about oil pressure too, but was thinking about my tractorsthat do that a lot as well... but then... air plane usage means you're usingall the horsepower available, all the time (unlike my tractor in "retirement"mowing mode). The weakest point is going to go first, and that must have beenthat cylinder. Water cooled engines run less piston/cylinder clearance than air cooled, it must'vejust got hot enough to interfere. You mentioned it wasn't getting quiteup to rpm prior to the failure, must've been the start of the event.Happy to hear you can merely hone the cylinder to get it back to good. What kindof cylinder hone do you use, a parallel rack and pinon stone, exanding parallelstone or ball? I'd recommend the first, which will enlarge the cylindermore, but maintain perfect round. The increased clearance won't hurt a bit. Most manuals don't recommend reboring until your in excess of 0.008 clearanceif the cylinder is within taper and out of round specs (which are FAR less). I'm thinking more might be better running these in airplanes. Probably do need more oil pressure, especially if Ford recommended it for carsback then. Water temp wouldn't likely have showed the problem very obviously.Glad to see you found a likely smoking gun.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Pietenpol-List: Re: A engine out
Original Posted By: "Pietflyer1977"
(preamble),I'm no expert but, i have seen a lot of blown-up engines. the pistonin your motor has damage consistent with preignition. the pinking,detonation,causesthe ring land to collapse. trapping the ring. typically,when you have abore that is too tight, the seizure is more symmetrical than yours.often theseare referred to as having seized "four square" as the damage starts at the sidesof the thrust faces. did the damage point at the exhaust valve in the block?if not then you should check the rod for straitness . you should anyway, alongwith whether or not the rod is centered and not side loaded anyway thereis a lot of inspection to undertake before reassembly. thats my two cents worth.justglad you didnt get hurt!.________________________________________________________________________________Subject: Pietenpol-List: Re: A engine out
(preamble),I'm no expert but, i have seen a lot of blown-up engines. the pistonin your motor has damage consistent with preignition. the pinking,detonation,causesthe ring land to collapse. trapping the ring. typically,when you have abore that is too tight, the seizure is more symmetrical than yours.often theseare referred to as having seized "four square" as the damage starts at the sidesof the thrust faces. did the damage point at the exhaust valve in the block?if not then you should check the rod for straitness . you should anyway, alongwith whether or not the rod is centered and not side loaded anyway thereis a lot of inspection to undertake before reassembly. thats my two cents worth.justglad you didnt get hurt!.________________________________________________________________________________Subject: Pietenpol-List: Re: A engine out
Pietenpol-List: Re: A engine out
Original Posted By: "bender"
I'll be there in my Piet. I think Shad is planning to go too. For sure I'll bethere Saturday. If I get very ambitious I'll take my son over Friday and we'llcamp out. A few years ago there were 6 Piets there! If the weather is goodthere is usually a decent turnout. Good grassroots kind of flying! Keep inmind Frank Pavliga keeps both of his beautiful Piets there too, the RudolphPiet and Sky Gypsy. Also he has the one and only flying Waco Nine there. Itis beautiful! If you can make it, come and look for the green Piet and introduceyourself.Don EmchNX899DERead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: A engine out
I'll be there in my Piet. I think Shad is planning to go too. For sure I'll bethere Saturday. If I get very ambitious I'll take my son over Friday and we'llcamp out. A few years ago there were 6 Piets there! If the weather is goodthere is usually a decent turnout. Good grassroots kind of flying! Keep inmind Frank Pavliga keeps both of his beautiful Piets there too, the RudolphPiet and Sky Gypsy. Also he has the one and only flying Waco Nine there. Itis beautiful! If you can make it, come and look for the green Piet and introduceyourself.Don EmchNX899DERead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: A engine out