---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Fri 03/19/04: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:31 AM - Re: TeamGrumman-List Digest: 2 Msgs - 03/18/04 (Tiger67B) 2. 05:56 AM - Re: Re: TeamGrumman-List Digest: 2 Msgs - 03/18/04 (flyv35b) 3. 09:41 PM - Main gear replacement (TeamGrumman@aol.com) ________________________________ Message 1 _____________________________________ Time: 12:31:43 AM PST US From: Tiger67B Subject: TeamGrumman-List: Re: TeamGrumman-List Digest: 2 Msgs - 03/18/04 --> TeamGrumman-List message posted by: Tiger67B Bayonet was used as generic term... the JPI comes with 3 bayonets and one "ring" type. It would result in the one cyl with the "ring" being the odd ball.. I made a point of putting all 4 in as bayonets to keep all reading "true" readings, all the same, with any differences being the real difference in temps....that's all. IF he put in one ring and 3 bayos, it might account for some of the disparity between cyls because ring will read differently than bayos....a stupid way to do it, I think.. Jan TeamGrumman-List Digest Server wrote: >* > > ================================================== > Online Versions of Today's List Digest Archive > ================================================== > >Today's complete TeamGrumman-List Digest can be also be found in either >of the two Web Links listed below. The .html file includes the Digest >formatted in HTML for viewing with a web browser and features Hyperlinked >Indexes and Message Navigation. The .txt file includes the plain ASCII >version of the TeamGrumman-List Digest and can be viewed with a generic >text editor such as Notepad or with a web browser. > >HTML Version: > > http://www.matronics.com/digest/teamgrumman-list/Digest.TeamGrumman-List.2004-03-18.html > >Text Version: > > http://www.matronics.com/digest/teamgrumman-list/Digest.TeamGrumman-List.2004-03-18.txt > > > ================================================ > EMail Version of Today's List Digest Archive > ================================================ > > > TeamGrumman-List Digest Archive > --- > Total Messages Posted Thu 03/18/04: 2 > > >Today's Message Index: >---------------------- > > 1. 04:54 PM - Re: TeamGrumman-List Digest: 8 Msgs - 03/15/04 (Tiger67B) > 2. 08:21 PM - Re: CHT PROBES (FLYaDIVE@aol.com) > > > >________________________________ Message 1 _____________________________________ > > >Time: 04:54:47 PM PST US >From: Tiger67B >Subject: TeamGrumman-List: Re: TeamGrumman-List Digest: 8 Msgs - 03/15/04 > >--> TeamGrumman-List message posted by: Tiger67B > >On some installations they will supply you with a thermocouple and 3 >bayonets for picking up CHTS's.... and they warn you that >numbers can be very different.... when I put in my JPI, I made a point >of getting all the same (bayonets) temp pickups, with no >thermocouples...it came with at least one.. > >Jan Savage >Tiger 67B > > > > >>________________________________ Message 1 _____________________________________ >> >> >>Time: 06:36:20 AM PST US >>From: "flyv35b" >>Subject: Re: TeamGrumman-List: Baffle adjustments >> >>--> TeamGrumman-List message posted by: "flyv35b" >> >>I'm sure Gary will have something to say about this, but 130+F variation >>between the front and rear cylinders is HUGH. I've never seen a plane with >>anywhere near that much variation. >> >>I'd take a close look at the rear baffles and the parts that wrap down under >>the cylinder barrel and head fins. The length of the head baffle is to long >>many times after someone has replaced it and it can restrict air flow. The >>head baffle should terminate at about the same location (clock position) as >>the barrel baffle. Some go so far you can even install a CHT probe. >> >>Of course there are several other areas that could be contributing to your >>high CHTs. Maybe something is wrong with the forward cylinder baffling and >>a lot of air is being "dumped" up at the front and thereby lowering the >>pressure and flow across the rear cylinders. Best get the problem resolved >>before the ambient temp gets warmer. >> >>Cliff A&P/IA >> >> >> >> > > >________________________________ Message 2 _____________________________________ > > >Time: 08:21:27 PM PST US >From: FLYaDIVE@aol.com >Subject: Re: TeamGrumman-List:CHT PROBES > >--> TeamGrumman-List message posted by: FLYaDIVE@aol.com > >In a message dated 3/18/04 7:56:02 PM Eastern Standard Time, >jnpsavage@cox.net writes: > > > >>--> TeamGrumman-List message posted by: Tiger67B >> >> On some installations they will supply you with a thermocouple and 3 >> bayonets for picking up CHTS's.... and they warn you that >> numbers can be very different.... when I put in my JPI, I made a point >> of getting all the same (bayonets) temp pickups, with no >> thermocouples...it came with at least one.. >> >> Jan Savage >> Tiger 67B >> >> >================ >Jan: > >Could you explain further? What do you mean by "I made a point of getting >all the same (bayonets) temp pickups, with no thermocouples...it came with at >least one.." > >Bayonet is the type of mount. Example: Bayonet and Ring/Gasket. Bayonet is >a misnomer it really is a threaded mount that screws into the cylinder head, >The Ring is a ring that fits under the spark plug. Which does not read CHT's as > >accurate as a bayonet due to its location. >The both are thermocouples. It is called a thermocouple because of the >dissimilar metal junction that produces a voltage in correspondence to a >temperature. > >Barry >"Chop'd Liver" > > > > > > > > > > > > > > > > -- Visit our PERSONAL WEBSITE at: http://www.geocities.com/tiger67bravo/ ________________________________ Message 2 _____________________________________ Time: 05:56:25 AM PST US From: "flyv35b" Subject: Re: TeamGrumman-List: Re: TeamGrumman-List Digest: 2 Msgs - 03/18/04 --> TeamGrumman-List message posted by: "flyv35b" > Bayonet was used as generic term... the JPI comes with 3 bayonets and > one "ring" type. It would result in the one cyl with > the "ring" being the odd ball.. I made a point of putting all 4 in as > bayonets to keep all reading "true" readings, all the same, with > any differences being the real difference in temps....that's all. IF he > put in one ring and 3 bayos, it might account for some of > the disparity between cyls because ring will read differently than > bayos....a stupid way to do it, I think.. If you ordered a 4 cyl. CHT for a Tiger, etc. from JPI, and got one spark plug thermocouple, you didn't tell them what you wanted. The only reason that they include a spark plug gasket thermocouple is for engines that had a CHT installed in the well (bayonet style) from the factory. The FAA required all "altitude engines" to have a CHT so the factory installed Alcor (usually) analog gauges with a probe in one cylinder only. Since you cannot remove this as it is a "primary" instrument (unless you install an approved primary replacement) then you need the spark plug thermocouple. There is another option, but I won't go into that. Cliff A&P/IA ----- Original Message ----- From: "Tiger67B" Subject: TeamGrumman-List: Re: TeamGrumman-List Digest: 2 Msgs - 03/18/04 > --> TeamGrumman-List message posted by: Tiger67B > > Bayonet was used as generic term... the JPI comes with 3 bayonets and > one "ring" type. It would result in the one cyl with > the "ring" being the odd ball.. I made a point of putting all 4 in as > bayonets to keep all reading "true" readings, all the same, with > any differences being the real difference in temps....that's all. IF he > put in one ring and 3 bayos, it might account for some of > the disparity between cyls because ring will read differently than > bayos....a stupid way to do it, I think.. > > Jan > > > TeamGrumman-List Digest Server wrote: > > >* > > > > ================================================== > > Online Versions of Today's List Digest Archive > > ================================================== > > > >Today's complete TeamGrumman-List Digest can be also be found in either > >of the two Web Links listed below. The .html file includes the Digest > >formatted in HTML for viewing with a web browser and features Hyperlinked > >Indexes and Message Navigation. The .txt file includes the plain ASCII > >version of the TeamGrumman-List Digest and can be viewed with a generic > >text editor such as Notepad or with a web browser. > > > >HTML Version: > > > > http://www.matronics.com/digest/teamgrumman-list/Digest.TeamGrumman-List.200 4-03-18.html > > > >Text Version: > > > > http://www.matronics.com/digest/teamgrumman-list/Digest.TeamGrumman-List.200 4-03-18.txt > > > > > > ================================================ > > EMail Version of Today's List Digest Archive > > ================================================ > > > > > > TeamGrumman-List Digest Archive > > --- > > Total Messages Posted Thu 03/18/04: 2 > > > > > >Today's Message Index: > >---------------------- > > > > 1. 04:54 PM - Re: TeamGrumman-List Digest: 8 Msgs - 03/15/04 (Tiger67B) > > 2. 08:21 PM - Re: CHT PROBES (FLYaDIVE@aol.com) > > > > > > > >________________________________ Message 1 _____________________________________ > > > > > >Time: 04:54:47 PM PST US > >From: Tiger67B > >Subject: TeamGrumman-List: Re: TeamGrumman-List Digest: 8 Msgs - 03/15/04 > > > >--> TeamGrumman-List message posted by: Tiger67B > > > >On some installations they will supply you with a thermocouple and 3 > >bayonets for picking up CHTS's.... and they warn you that > >numbers can be very different.... when I put in my JPI, I made a point > >of getting all the same (bayonets) temp pickups, with no > >thermocouples...it came with at least one.. > > > >Jan Savage > >Tiger 67B > > > > > > > > > >>________________________________ Message 1 _____________________________________ > >> > >> > >>Time: 06:36:20 AM PST US > >>From: "flyv35b" > >>Subject: Re: TeamGrumman-List: Baffle adjustments > >> > >>--> TeamGrumman-List message posted by: "flyv35b" > >> > >>I'm sure Gary will have something to say about this, but 130+F variation > >>between the front and rear cylinders is HUGH. I've never seen a plane with > >>anywhere near that much variation. > >> > >>I'd take a close look at the rear baffles and the parts that wrap down under > >>the cylinder barrel and head fins. The length of the head baffle is to long > >>many times after someone has replaced it and it can restrict air flow. The > >>head baffle should terminate at about the same location (clock position) as > >>the barrel baffle. Some go so far you can even install a CHT probe. > >> > >>Of course there are several other areas that could be contributing to your > >>high CHTs. Maybe something is wrong with the forward cylinder baffling and > >>a lot of air is being "dumped" up at the front and thereby lowering the > >>pressure and flow across the rear cylinders. Best get the problem resolved > >>before the ambient temp gets warmer. > >> > >>Cliff A&P/IA > >> > >> > >> > >> > > > > > >________________________________ Message 2 _____________________________________ > > > > > >Time: 08:21:27 PM PST US > >From: FLYaDIVE@aol.com > >Subject: Re: TeamGrumman-List:CHT PROBES > > > >--> TeamGrumman-List message posted by: FLYaDIVE@aol.com > > > >In a message dated 3/18/04 7:56:02 PM Eastern Standard Time, > >jnpsavage@cox.net writes: > > > > > > > >>--> TeamGrumman-List message posted by: Tiger67B > >> > >> On some installations they will supply you with a thermocouple and 3 > >> bayonets for picking up CHTS's.... and they warn you that > >> numbers can be very different.... when I put in my JPI, I made a point > >> of getting all the same (bayonets) temp pickups, with no > >> thermocouples...it came with at least one.. > >> > >> Jan Savage > >> Tiger 67B > >> > >> > >================ > >Jan: > > > >Could you explain further? What do you mean by "I made a point of getting > >all the same (bayonets) temp pickups, with no thermocouples...it came with at > >least one.." > > > >Bayonet is the type of mount. Example: Bayonet and Ring/Gasket. Bayonet is > >a misnomer it really is a threaded mount that screws into the cylinder head, > >The Ring is a ring that fits under the spark plug. Which does not read CHT's as > > > >accurate as a bayonet due to its location. > >The both are thermocouples. It is called a thermocouple because of the > >dissimilar metal junction that produces a voltage in correspondence to a > >temperature. > > > >Barry > >"Chop'd Liver" > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > Visit our PERSONAL WEBSITE at: http://www.geocities.com/tiger67bravo/ > > ________________________________ Message 3 _____________________________________ Time: 09:41:12 PM PST US From: TeamGrumman@aol.com Subject: TeamGrumman-List: Main gear replacement --> TeamGrumman-List message posted by: TeamGrumman@aol.com Well, good news. It takes about 5 hours to remove the sump cover fairing, brake cover, wheel pants, brakes, brake line, and, finally, the gear leg. The gear leg is fractured in 3 places .. lengthwise. The two bottom bolts, AN6-24A bolts, were bent! Everything had a LOT of corrosion on it. I had all of the steel parts cad plated and powder coated in white. I had the axle anodized gold. I replaced all of the hardware. I sand blasted all of the brake caliper parts (for both brakes), painted all of them. Today, I put it all back together. It took about 5 hours to put it all back together ... not including the wheel pant, sump or brake cover. I replaced the brake lines on both brakes. Then bled the brakes. So far, so good. Tomorrow, I start on the nose strut replacement. I'm getting it painted in Imron before I install it. It's getting a new wheel pant (with new hardware) and new nose gear boot too. Gary