---------------------------------------------------------- Continental-List Digest Archive --- Total Messages Posted Mon 03/07/11: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:28 AM - Re: A-65 rebuild (Tommy Walker) 2. 09:29 AM - Re: A-65 rebuild (Tommy Walker) 3. 11:13 AM - Re: Re: A-65 rebuild (Randy L. Thwing) 4. 12:41 PM - Re: Re: A-65 rebuild (Monty Barrett Sr) 5. 02:22 PM - Re: Re: A-65 rebuild (Randy L. Thwing) 6. 02:34 PM - Re: Re: A-65 rebuild (Tommy Walker) 7. 06:19 PM - Re: Re: A-65 rebuild (Deems Herring) 8. 08:08 PM - Re: Re: A-65 rebuild (Randy L. Thwing) ________________________________ Message 1 _____________________________________ Time: 09:28:47 AM PST US Subject: Continental-List: Re: A-65 rebuild From: "Tommy Walker" Randy, thanks for the valuable information. However, I just got hit with some bad news this morning. The flange on my O200 crank is cracked and not repairable. So, it is back to square one for me. I hate to throw away my investment in this engine, so I am searching for a replacement. Anyone have a lead on a crank? Thanks, Tommy Walker in Alabama -------- Tommy Walker N8701 - Anniston, AL Read this topic online here: http://forums.matronics.com/viewtopic.php?p=333063#333063 ________________________________ Message 2 _____________________________________ Time: 09:29:56 AM PST US Subject: Continental-List: Re: A-65 rebuild From: "Tommy Walker" There's lots of valuable info there Deems, thanks for the link. See my post above if you have any leads. Tommy Walker in Alabama [quote="dsleepy47"]If you are looking for information this: http://www.bowersflybaby.com/tech/fenton.htm is a good place to spend a few hours. It will answer many of the questions about small Continentals. After that if you have any specific questions I'll see what I can do. Deems Herring A&P, IA, O-200 owner > [b] -------- Tommy Walker N8701 - Anniston, AL Read this topic online here: http://forums.matronics.com/viewtopic.php?p=333064#333064 ________________________________ Message 3 _____________________________________ Time: 11:13:49 AM PST US From: "Randy L. Thwing" Subject: Re: Continental-List: Re: A-65 rebuild do not archive Tommy: I'm sure the news about it being "unrepairable" is for Certified use. For experimental use, you could repair in any manner. Now, I'm not saying to be slipshod and unsafe, but put out the word of what the damage is and seek help. Go to your local race engine shop for opinions. There may be a very safe way to reapir this, just not FAA approved. But that's one very good reason to go experimental, to get OUT of the certified business. OK the flange is cracked, how's the rest of it? Journal conditions, straightness? Good Luck, Randy, Las Vegas ----- Original Message ----- From: "Tommy Walker" Sent: Monday, March 07, 2011 9:26 AM Subject: Continental-List: Re: A-65 rebuild > > > Randy, thanks for the valuable information. > > However, I just got hit with some bad news this morning. The flange on my > O200 crank is cracked and not repairable. So, it is back to square one > for me. I hate to throw away my investment in this engine, so I am > searching for a replacement. > > Anyone have a lead on a crank? > > Thanks, > > Tommy Walker in Alabama > > -------- > Tommy Walker > N8701 - Anniston, AL > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=333063#333063 > > -------------------------------------------------------------------------------- Checked by AVG - www.avg.com 07:34:00 ________________________________ Message 4 _____________________________________ Time: 12:41:07 PM PST US Subject: RE: Continental-List: Re: A-65 rebuild From: "Monty Barrett Sr" Hey, Man, A cracked flange is a serious defect. I wouldn't mess with it 1/2 second. Fixing something in a race car shop is a whole bunch different than fixing something for an aircraft. 3 or 4 reasons readily come to mind. 1. Race car can just pull into the pits. 2. The materials may be and probably are different. The 0-200 crankshaft is forged from AISI 4340, not the best welding material in the world. Too much carbon in the base metal and it's nitrided. 3. Do you have any idea what happens with control issues introduced when you sling a prop off ? 4. How much is your safety worth ? A serviceable tagged crankshaft from a reputable shop would probably cost $2100 or so. Monty Barrett Barrett Precision Engines, Inc. Over 40 years in the aircraft engine business. -----Original Message----- From: owner-continental-list-server@matronics.com [mailto:owner-continental-list-server@matronics.com] On Behalf Of Randy L. Thwing Sent: Monday, March 07, 2011 1:11 PM Subject: Re: Continental-List: Re: A-65 rebuild --> do not archive Tommy: I'm sure the news about it being "unrepairable" is for Certified use. For experimental use, you could repair in any manner. Now, I'm not saying to be slipshod and unsafe, but put out the word of what the damage is and seek help. Go to your local race engine shop for opinions. There may be a very safe way to reapir this, just not FAA approved. But that's one very good reason to go experimental, to get OUT of the certified business. OK the flange is cracked, how's the rest of it? Journal conditions, straightness? Good Luck, Randy, Las Vegas ----- Original Message ----- From: "Tommy Walker" Sent: Monday, March 07, 2011 9:26 AM Subject: Continental-List: Re: A-65 rebuild > > > Randy, thanks for the valuable information. > > However, I just got hit with some bad news this morning. The flange > on my > O200 crank is cracked and not repairable. So, it is back to square one > for me. I hate to throw away my investment in this engine, so I am > searching for a replacement. > > Anyone have a lead on a crank? > > Thanks, > > Tommy Walker in Alabama > > -------- > Tommy Walker > N8701 - Anniston, AL > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=333063#333063 > > ------------------------------------------------------------------------ -------- Checked by AVG - www.avg.com 07:34:00 ________________________________ Message 5 _____________________________________ Time: 02:22:29 PM PST US From: "Randy L. Thwing" Subject: Re: Continental-List: Re: A-65 rebuild Good Stuff Monty: Is or was (say post ww2) there any small certified engine crank (horizontal opposed) that was manufactured with the prop flange welded to the crank? Regards, Randy, Las Vegas ----- Original Message ----- From: "Monty Barrett Sr" Sent: Monday, March 07, 2011 12:47 PM Subject: RE: Continental-List: Re: A-65 rebuild > > > Hey, Man, > A cracked flange is a serious defect. I wouldn't mess with it 1/2 > second. Fixing something in a race car shop is a whole bunch different > than fixing something for an aircraft. 3 or 4 reasons readily come to > mind. 1. Race car can just pull into the pits. 2. The materials may > be and probably are different. The 0-200 crankshaft is forged from AISI > 4340, not the best welding material in the world. Too much carbon in > the base metal and it's nitrided. 3. Do you have any idea what happens > with control issues introduced when you sling a prop off ? 4. How much > is your safety worth ? > > A serviceable tagged crankshaft from a reputable shop would probably > cost $2100 or so. > > Monty Barrett > Barrett Precision Engines, Inc. > Over 40 years in the aircraft engine business. ________________________________ Message 6 _____________________________________ Time: 02:34:19 PM PST US Subject: Re: Continental-List: Re: A-65 rebuild From: Tommy Walker I would probably pay $2100.00 for a certified crank. I was quoted 2814.00 for a new one today. That's not bad (relative term) either. You got one Monty? Tommy On Mon, Mar 7, 2011 at 2:47 PM, Monty Barrett Sr wrote: > MONTY@bpaengines.com> > > Hey, Man, > A cracked flange is a serious defect. I wouldn't mess with it 1/2 > second. Fixing something in a race car shop is a whole bunch different > than fixing something for an aircraft. 3 or 4 reasons readily come to > mind. 1. Race car can just pull into the pits. 2. The materials may > be and probably are different. The 0-200 crankshaft is forged from AISI > 4340, not the best welding material in the world. Too much carbon in > the base metal and it's nitrided. 3. Do you have any idea what happens > with control issues introduced when you sling a prop off ? 4. How much > is your safety worth ? > > A serviceable tagged crankshaft from a reputable shop would probably > cost $2100 or so. > > Monty Barrett > Barrett Precision Engines, Inc. > Over 40 years in the aircraft engine business. > > -----Original Message----- > From: owner-continental-list-server@matronics.com > [mailto:owner-continental-list-server@matronics.com] On Behalf Of Randy > L. Thwing > Sent: Monday, March 07, 2011 1:11 PM > To: continental-list@matronics.com > Subject: Re: Continental-List: Re: A-65 rebuild > > > --> > > do not archive > > Tommy: > > I'm sure the news about it being "unrepairable" is for Certified use. > For > experimental use, you could repair in any manner. Now, I'm not saying > to be > slipshod and unsafe, but put out the word of what the damage is and seek > > help. Go to your local race engine shop for opinions. There may be a > very > safe way to reapir this, just not FAA approved. > > But that's one very good reason to go experimental, to get OUT of the > certified business. > > OK the flange is cracked, how's the rest of it? Journal conditions, > straightness? > > Good Luck, > > Randy, Las Vegas > > > ----- Original Message ----- > From: "Tommy Walker" > To: > Sent: Monday, March 07, 2011 9:26 AM > Subject: Continental-List: Re: A-65 rebuild > > > > > > > > Randy, thanks for the valuable information. > > > > However, I just got hit with some bad news this morning. The flange > > on my > > O200 crank is cracked and not repairable. So, it is back to square > one > > for me. I hate to throw away my investment in this engine, so I am > > searching for a replacement. > > > > Anyone have a lead on a crank? > > > > Thanks, > > > > Tommy Walker in Alabama > > > > -------- > > Tommy Walker > > N8701 - Anniston, AL > > > > > > > > > > Read this topic online here: > > > > http://forums.matronics.com/viewtopic.php?p=333063#333063 > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------ > -------- > > > Checked by AVG - www.avg.com > 07:34:00 > > ________________________________ Message 7 _____________________________________ Time: 06:19:18 PM PST US From: Deems Herring Subject: RE: Continental-List: Re: A-65 rebuild Tommy=2C did I miss something? are you rebuilding an A-65 or an O-200? The problem with the original cylinders is the threads where the liner thre ads into the head. If you didn't know the steel liners are threaded at the top and they screw into the aluminum heads. the way the threads are made in the aluminum of the old style cylinders creates a stress concentration poi nt and the cylinders crack at the end of the threads and it is possible for the head to separate from the rest of the cylinder. The newer style cylind ers have a different thread design. This is different from the cracking in the area of the valves which all small continentals are susceptible too and which can be repaired but do not expect repaired heads to last as long as they did before the repair. I would not consider head repairs on cylinders you do not have a 100% accurate history on. Here are some pictures of the k ind of cracks that lead to separation: http://www.sacskyranch.com/eng82.htm and here is another place with good information on the O-200. Deems > From: n4546v@mindspring.com > To: continental-list@matronics.com > Subject: Re: Continental-List: Re: A-65 rebuild > Date: Sun=2C 6 Mar 2011 19:53:52 -0800 > ing.com> > > Hello Tommy: > > Yes=2C I am on most of the ZA lists. We have corresponded before. > > The following contains many facts and a lot of my opinions. It is worth > exactly what you are paying for it. > > If you have a O-200 that is used in a certified aircraft=2C with original > Continental cylinders identified by casting numbers=2C they are subject t o > cylinder head cracking. ________________________________ Message 8 _____________________________________ Time: 08:08:01 PM PST US From: "Randy L. Thwing" Subject: Re: Continental-List: Re: A-65 rebuild do not archive Hello Tommy: If you are shopping for a used crankshaft for a O-200 here a a few considerations: Continental allows overhauls to occur with crankshafts with standard diameter journals and with journals ground .010" undersize. If it doesn't meet one of those specs, Continental expects you to buy a new crankshaft. There is a STC available through the crank grinding shops that allow a O-200 crank to be ground .020" undersize. This saves a crank, but the bearings necessary to use a .020" under crank cost about twice or more as much as the standard or .010 under bearings. I don't have current pricing, but if standard bearings cost 230.00 (mains & rods), .020" under bearings may cost 450.00 or more. Don't quote me, get current pricing. Just more infomation to help in your decision if you are offered a used crankshaft. Regards, Randy, Las Vegas ----- Original Message ----- From: "Tommy Walker" Sent: Sunday, March 06, 2011 8:50 AM Subject: Continental-List: Re: A-65 rebuild > > > Hi Randy, > > I think I remember you from the Zenith list. Right? > > I now see that my post got posted twice. I sent it via email and when I > checked it hadn't been added so I copied it and pasted. Just deleted the > first reply. > > Cylinders.... > > We hope to use our cylinders. It all depends on how the inspection goes. > If I could find a good deal on cylinders like I did on new ones from TCM a > few years ago, I would go for it. But if these check out we will use > them. They are steel cylinders with no oversize. The engine had 240 hrs > SMOH when it had a prop strike. We are waiting to hear about Crank and > case.... > > -------- > Tommy Walker > N8701 - Anniston, AL > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=332905#332905 > > -------------------------------------------------------------------------------- Checked by AVG - www.avg.com 07:35:00 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message continental-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Continental-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/continental-list Browse Digests http://www.matronics.com/digest/continental-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.