---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Sun 06/29/08: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:06 AM - Re: Fuel tank sealant available (Doug Gray) 2. 07:09 AM - Re: Fuel tank sealant available (JFLEISC@aol.com) 3. 07:32 AM - Re: Fuel tank sealant available (Kelly McMullen) 4. 09:56 AM - OT: help looking for a part (Chris W) 5. 10:36 AM - Re: OT: help looking for a part (Brian Kraut) 6. 10:54 AM - Re: OT: help looking for a part (Jack Hilditch) 7. 11:33 AM - Re: OT: help looking for a part (Terry Watson) 8. 12:20 PM - Re: OT: help looking for a part (Paul Rice) 9. 01:29 PM - Re: OT: help looking for a part (linn Walters) 10. 03:49 PM - Re: OT: help looking for a part (Chris W) ________________________________ Message 1 _____________________________________ Time: 12:06:49 AM PST US Subject: Re: RV-List: Fuel tank sealant available From: Doug Gray On Sat, 2008-06-28 at 20:40 -0400, JFLEISC@aol.com wrote: > Which one is the 'good ol' stuff? MIL-S-8802 Was the original specification. Manufacturers complied with the spec or did not get the gig. My original quart cans from Vans were marked with the Mil-STD reference. This standard covers a number of variations, I would be surprised if the PRC product line had variations beyond these. I believe manufacture is limited to a small number of plants if not one only with the real industry being repackaging the product. Hence we see it appearing under a host of labels and package types at corresponding markups. Yes you are correct - it might well have been tweaked along the way especially after the mil-stds were transferred to industry. Doug ________________________________ Message 2 _____________________________________ Time: 07:09:48 AM PST US From: JFLEISC@aol.com Subject: Re: RV-List: Fuel tank sealant available In a message dated 6/29/2008 3:08:19 A.M. Eastern Daylight Time, dgra1233@bigpond.net.au writes: Yes you are correct - it might well have been tweaked along the way especially after the mil-stds were transferred to industry. Therein lies the issue; In my research I came across a lot of "mights, maybes, or rumors". I am also reasonably sure that they, as you say, are all if not pretty close to the same, but to be sure I went with the data sheets and very few referenced alcohol. At least with the ones that do, I have it in writing as being tested for it. Jim **************Gas prices getting you down? Search AOL Autos for fuel-efficient used cars. (http://autos.aol.com/used?ncid=aolaut00050000000007) ________________________________ Message 3 _____________________________________ Time: 07:32:58 AM PST US From: Kelly McMullen Subject: Re: RV-List: Fuel tank sealant available I don't know the full history of the sealant, but from a couple updates to the Mooney manuals I can ascertain that in 1966 they were spec-ing PR1221-B-4, mil spec 7502C, while by 1981 the spec changed to PR1422-B2, mil spec 8802, which remains their standard today. Doug Gray wrote: > > On Sat, 2008-06-28 at 20:40 -0400, JFLEISC@aol.com wrote: > >> Which one is the 'good ol' stuff? >> > > MIL-S-8802 Was the original specification. Manufacturers complied with > the spec or did not get the gig. My original quart cans from Vans were > marked with the Mil-STD reference. > > This standard covers a number of variations, I would be surprised if the > PRC product line had variations beyond these. > > I believe manufacture is limited to a small number of plants if not one > only with the real industry being repackaging the product. Hence we see > it appearing under a host of labels and package types at corresponding > markups. > > Yes you are correct - it might well have been tweaked along the way > especially after the mil-stds were transferred to industry. > > Doug > > ________________________________ Message 4 _____________________________________ Time: 09:56:50 AM PST US From: Chris W <3edcft6@cox.net> Subject: RV-List: OT: help looking for a part Totally non aviation related but if the part I am looking for exists, I'm sure someone here knows where to get it. I have this mechanism (details not important) that is actuated with a rope, probably 3/16" parachute cord. The rope will exit out of a wood cabinet through a round hole. The problem is the pull on the rope will be almost at 90 degrees from the axis of the hole causing it to rub on the edge of the hole which will make the rope wear out and cause lots of friction. What I am looking for is some kind of metal insert I can put in the hole that will have a large inside radius to give the rope a smooth surface to ride on. I know a pulley would be the ideal solution but that would make the cabinet unattractive and the force on the rope will be less than 20 lbs so I think it should work fine with just some kind of bushing in the hole. The larger the radius the better this should work. I'm hoping to find something made out of either Stainless steel or Brass. I guess a plastic would be ok too but I would rather it be metal. What I had in mind was something with a similar cross section to the attached drawing. I could just have a machine shop put a radius on a brass bushing but I would rather not have to do that, and I haven't found a bushing with a thick enough wall to get as large of a radius as I would like, 1/4" or larger. do not archive -- Chris W KE5GIX "Protect your digital freedom and privacy, eliminate DRM, learn more at http://www.defectivebydesign.org/what_is_drm" Ham Radio Repeater Database. http://hrrdb.com ________________________________ Message 5 _____________________________________ Time: 10:36:02 AM PST US From: "Brian Kraut" Subject: RE: RV-List: OT: help looking for a part How about a cable fairlead from Aircraft Spruce? http://www.aircraftspruce.com/pdf/2008Individual/Cat08139.pdf Brian Kraut Engineering Alternatives, Inc. www.engalt.com -----Original Message----- From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com]On Behalf Of Chris W Sent: Sunday, June 29, 2008 12:53 PM Subject: RV-List: OT: help looking for a part Totally non aviation related but if the part I am looking for exists, I'm sure someone here knows where to get it. I have this mechanism (details not important) that is actuated with a rope, probably 3/16" parachute cord. The rope will exit out of a wood cabinet through a round hole. The problem is the pull on the rope will be almost at 90 degrees from the axis of the hole causing it to rub on the edge of the hole which will make the rope wear out and cause lots of friction. What I am looking for is some kind of metal insert I can put in the hole that will have a large inside radius to give the rope a smooth surface to ride on. I know a pulley would be the ideal solution but that would make the cabinet unattractive and the force on the rope will be less than 20 lbs so I think it should work fine with just some kind of bushing in the hole. The larger the radius the better this should work. I'm hoping to find something made out of either Stainless steel or Brass. I guess a plastic would be ok too but I would rather it be metal. What I had in mind was something with a similar cross section to the attached drawing. I could just have a machine shop put a radius on a brass bushing but I would rather not have to do that, and I haven't found a bushing with a thick enough wall to get as large of a radius as I would like, 1/4" or larger. do not archive -- Chris W KE5GIX "Protect your digital freedom and privacy, eliminate DRM, learn more at http://www.defectivebydesign.org/what_is_drm" Ham Radio Repeater Database. http://hrrdb.com ________________________________ Message 6 _____________________________________ Time: 10:54:34 AM PST US From: "Jack Hilditch" Subject: RE: RV-List: OT: help looking for a part Chris, Those types of blocks are common in the sailing world and are called turning blocks. They are typically mounted inside masts, booms or other hardware. You might try this piece for starters: http://discountmarinesource.com/detail.aspx?ID=823 They come in many sizes and rated for small to very large loads and there are models for standard rope, wire-rope, wire and aramids. Good luck, Jack Hilditch RV-9A project underway -----Original Message----- From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of Chris W Sent: Sunday, June 29, 2008 12:53 PM Subject: RV-List: OT: help looking for a part Totally non aviation related but if the part I am looking for exists, I'm sure someone here knows where to get it. I have this mechanism (details not important) that is actuated with a rope, probably 3/16" parachute cord. The rope will exit out of a wood cabinet through a round hole. The problem is the pull on the rope will be almost at 90 degrees from the axis of the hole causing it to rub on the edge of the hole which will make the rope wear out and cause lots of friction. What I am looking for is some kind of metal insert I can put in the hole that will have a large inside radius to give the rope a smooth surface to ride on. I know a pulley would be the ideal solution but that would make the cabinet unattractive and the force on the rope will be less than 20 lbs so I think it should work fine with just some kind of bushing in the hole. The larger the radius the better this should work. I'm hoping to find something made out of either Stainless steel or Brass. I guess a plastic would be ok too but I would rather it be metal. What I had in mind was something with a similar cross section to the attached drawing. I could just have a machine shop put a radius on a brass bushing but I would rather not have to do that, and I haven't found a bushing with a thick enough wall to get as large of a radius as I would like, 1/4" or larger. do not archive -- Chris W KE5GIX "Protect your digital freedom and privacy, eliminate DRM, learn more at http://www.defectivebydesign.org/what_is_drm" Ham Radio Repeater Database. http://hrrdb.com ________________________________ Message 7 _____________________________________ Time: 11:33:09 AM PST US From: "Terry Watson" Subject: RE: RV-List: OT: help looking for a part Chris, Sailboat hardware manufacturer's make something called an exit block which has a pulley in it, or an exit plate that doesn't have the pulley that works in a situation like you are describing. They probably won't work if you want to be able to pull the line from any angle since they are directional. Here's a link to an exit plate by one manufacturer. From the prices for this stuff, you would think they were for airplanes. http://www.fawcettboat.com/iwwidb.pvx?;multi_item_submit Terry -----Original Message----- From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of Chris W Sent: Sunday, June 29, 2008 9:53 AM Subject: RV-List: OT: help looking for a part Totally non aviation related but if the part I am looking for exists, I'm sure someone here knows where to get it. I have this mechanism (details not important) that is actuated with a rope, probably 3/16" parachute cord. The rope will exit out of a wood cabinet through a round hole. The problem is the pull on the rope will be almost at 90 degrees from the axis of the hole causing it to rub on the edge of the hole which will make the rope wear out and cause lots of friction. What I am looking for is some kind of metal insert I can put in the hole that will have a large inside radius to give the rope a smooth surface to ride on. I know a pulley would be the ideal solution but that would make the cabinet unattractive and the force on the rope will be less than 20 lbs so I think it should work fine with just some kind of bushing in the hole. The larger the radius the better this should work. I'm hoping to find something made out of either Stainless steel or Brass. I guess a plastic would be ok too but I would rather it be metal. What I had in mind was something with a similar cross section to the attached drawing. I could just have a machine shop put a radius on a brass bushing but I would rather not have to do that, and I haven't found a bushing with a thick enough wall to get as large of a radius as I would like, 1/4" or larger. do not archive -- Chris W KE5GIX "Protect your digital freedom and privacy, eliminate DRM, learn more at http://www.defectivebydesign.org/what_is_drm" Ham Radio Repeater Database. http://hrrdb.com ________________________________ Message 8 _____________________________________ Time: 12:20:28 PM PST US From: Paul Rice Subject: RE: RV-List: OT: help looking for a part Hey Chris, Also in the sailing world, they make deck bushings for just such a perpose. Go on line to search them out. How big a hole do have in the cabinet. Paul Rv8 ________________________________ Message 9 _____________________________________ Time: 01:29:19 PM PST US From: linn Walters Subject: Re: RV-List: OT: help looking for a part I read all the other replies and while I was thinking of a large brass grommet ..... like to put in canvass ..... there are far better solutions already. My question is what the heck does the rope do in the cabinet???? Answer quickly .... I want to sleep tonight!!! :-P Linn do not archive > Totally non aviation related but if the part I am looking for exists, > I'm sure someone here knows where to get it. > > I have this mechanism (details not important) that is actuated with a > rope, probably 3/16" parachute cord. The rope will exit out of a wood > cabinet through a round hole. The problem is the pull on the rope > will be almost at 90 degrees from the axis of the hole causing it to > rub on the edge of the hole which will make the rope wear out and > cause lots of friction. snip! ________________________________ Message 10 ____________________________________ Time: 03:49:23 PM PST US From: Chris W <3edcft6@cox.net> Subject: Re: RV-List: OT: help looking for a part It is to assist the folding up of a Murphy bed. The gas springs aren't quite enough to balance out the weight of the bed is with the the rope I can pull instead of push. Also the tight fit makes it very hard to get at the foot of the bed to push where there is the most leverage. So for it looks like the cable fairleads form aircraft Spruce look like the best option. The catalog doesn't say how large the inside hole is though. linn Walters wrote: > > I read all the other replies and while I was thinking of a large brass > grommet ..... like to put in canvass ..... there are far better > solutions already. My question is what the heck does the rope do in > the cabinet???? Answer quickly .... I want to sleep tonight!!! :-P > Linn > do not archive >> Totally non aviation related but if the part I am looking for exists, >> I'm sure someone here knows where to get it. >> >> I have this mechanism (details not important) that is actuated with a >> rope, probably 3/16" parachute cord. The rope will exit out of a >> wood cabinet through a round hole. The problem is the pull on the >> rope will be almost at 90 degrees from the axis of the hole causing >> it to rub on the edge of the hole which will make the rope wear out >> and cause lots of friction. > snip! > > -- Chris W KE5GIX "Protect your digital freedom and privacy, eliminate DRM, learn more at http://www.defectivebydesign.org/what_is_drm" Ham Radio Repeater Database. http://hrrdb.com ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-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/rv-list Browse Digests http://www.matronics.com/digest/rv-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.