---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sat 07/16/11: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:28 AM - Re: European registration/certification (Etienne Verhellen) 2. 05:03 AM - Re: European registration/certification (Thomas Smith) 3. 07:47 AM - Re: European registration/certification (mougellionel@aol.com) 4. 12:25 PM - Re: Re: Undercarriage (Didier BLOUZARD) 5. 04:38 PM - Re: Re: Undercarriage (Chris Wise) 6. 05:50 PM - Re: Undercarriage (Vic) 7. 06:42 PM - Re: Re: Undercarriage (Chris Wise) 8. 08:47 PM - Weather (Herb Coussons) 9. 08:51 PM - Re: Weather (Eric Wobschall) ________________________________ Message 1 _____________________________________ Time: 02:28:08 AM PST US Subject: Yak-List: Re: European registration/certification From: "Etienne Verhellen" Mr Peiper, Thanks for your message. I have no dispute with anyone. http://www.planepictures.net/netshow.php?id=524448 http://picasaweb.google.com/janmevis/GeneratorYakEtienne?authkey=Gv1sRgCK3J6qqEsvn-Ag# Enjoy the summer ... flying if you can 8) I agree Mr Peiper, and as I have written before : http://forums.matronics.com/viewtopic.php?t=82933&highlight=european+certification "I feel this discussion is going nowhere and I suggest we just leave it there". Read this topic online here: http://forums.matronics.com/viewtopic.php?p=346632#346632 Attachments: http://forums.matronics.com//files/jan_and_etienne_852.png http://forums.matronics.com//files/jan__etienne_494.jpg http://forums.matronics.com//files/pierre_and_jan__christian__etienne_127.jpg ________________________________ Message 2 _____________________________________ Time: 05:03:27 AM PST US From: Thomas Smith Subject: Re: Yak-List: European registration/certification I too would hate to loose George, and know how he feels.- I recently left the aerobatic list because of too much BS and personal messages that would best have been communicated off list.=0A=0ATom Smith=0A ________________________________ Message 3 _____________________________________ Time: 07:47:25 AM PST US Subject: Re: Yak-List: European registration/certification From: mougellionel@aol.com Instead of fighting each other like the situation i see currently in Europe, i would be preferable to unify people and onwers , not to see smalls gangs o f pilots doing nothing or simply talking putting more their cv as signature t han usefull informations . Some english and French guys are pulling the cover to them in order to creat e or maintain their own maintenance facility , why ? Ra is not enough or peo ple always want more money ? As somebody told before , i would be better to be in US instead or France wh en i see the poor mind of some people ... Sent by Iphone Le 16 juil. 2011 =C3- 14:00, Thomas Smith a =C3=A9 crit : > I too would hate to loose George, and know how he feels. I recently left t he aerobatic list because of too much BS and personal messages that would be st have been communicated off list. > > Tom Smith > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= > ________________________________ Message 4 _____________________________________ Time: 12:25:59 PM PST US Subject: Re: Yak-List: Re: Undercarriage From: Didier BLOUZARD Hello vic This is two interesting mods Could you take a little time and take pictures or is it too late? Anyway how difficult was it to do it. Did you need special tools ? Or skills? Where can you have these new seals? Thanks for any advice Regards Didier Blouzard +33 6 2424 3672 Le 16 juil. 2011 02:37, "Vic" a crit : > > Hi Chris, > > what is dive bottle air, 80 percent nitrogen and 20 percent oxygen ? How much water can be in a refill of very few litres of air from a dive bottle provided the bottle was filled in controlled conditions ? So we decided it was not worthwhile to go for pure nitrogen. > Basically silicone grease is a great lubricant for rubber or plastics and I use it in some places in the actuating cylinders . Or otherwise a heavy lithium grease for the bronce bushes in the landing gear and the ball locks in the actuators. We did a complete landing gear overhaul last winter and found that excessive wear in the bronce bushes showed in the scuffed anodised aluminium bushes. The original felt "seals" cannot keep the dirt out and the grease in the strut so I replaced them by seals used in hydraulic systems. A wiper seal keeps dirt out and an o-ring keeps the grease inside. Id strongly suggest to do this mod but this may be too late in your case. The action of the landing gear on the ground is a bit stiff still, could be the grease and new bushes. But the unpressurized strut moved smoothly so I suspect with 20 bar in the system the o-rings produce a lot of friction. > The original damper valve has no springs so this creates a lot of backlash and knocking noise on rough airfields, so I did another mod to cure this. But this year still no real test on rough ground done to report. > > Cheers > Vic > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=346609#346609 > > > > > Attachments: > > http://forums.matronics.com//files/p1040651_487.jpg > http://forums.matronics.com//files/p1040677_379.jpg > > > > > > > ________________________________ Message 5 _____________________________________ Time: 04:38:06 PM PST US From: "Chris Wise" Subject: RE: Yak-List: Re: Undercarriage G'Day Vic, Thanks for that. Makes a lot of sense and we have one oleo stripped and I see no problem in fitting a suitable seal. I shall keep you informed. Cheers, Chris. ----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Vic Sent: Saturday, 16 July 2011 10:07 AM Subject: Yak-List: Re: Undercarriage Hi Chris, what is dive bottle air, 80 percent nitrogen and 20 percent oxygen ? How much water can be in a refill of very few litres of air from a dive bottle provided the bottle was filled in controlled conditions ? So we decided it was not worthwhile to go for pure nitrogen. Basically silicone grease is a great lubricant for rubber or plastics and I use it in some places in the actuating cylinders . Or otherwise a heavy lithium grease for the bronce bushes in the landing gear and the ball locks in the actuators. We did a complete landing gear overhaul last winter and found that excessive wear in the bronce bushes showed in the scuffed anodised aluminium bushes. The original felt "seals" cannot keep the dirt out and the grease in the strut so I replaced them by seals used in hydraulic systems. A wiper seal keeps dirt out and an o-ring keeps the grease inside. Id strongly suggest to do this mod but this may be too late in your case. The action of the landing gear on the ground is a bit stiff still, could be the grease and new bushes. But the unpressurized strut moved smoothly so I suspect with 20 bar in the system the o-rings produce a lot of friction. The original damper valve has no springs so this creates a lot of backlash and knocking noise on rough airfields, so I did another mod to cure this. But this year still no real test on rough ground done to report. Cheers Vic Read this topic online here: http://forums.matronics.com/viewtopic.php?p=346609#346609 Attachments: http://forums.matronics.com//files/p1040651_487.jpg http://forums.matronics.com//files/p1040677_379.jpg ________________________________ Message 6 _____________________________________ Time: 05:50:35 PM PST US Subject: Yak-List: Re: Undercarriage From: "Vic" Hi Didier, Chris, for dismantling the struts you may need two special spanners, as you see in the photo above. Didier, you can have them for a while - winter, I think, would be ideal for the job. Maybe we meet in Eggenfelden some day for you to pick them up. Also I made up some sort of shoe horn to help the piston ring over the shoulder in the strut. This is a pipe with 65mm o.d. and 62mm i.d. and ~200mm long cut in two halves. The nose wheel is different by few mms, I can check sizes later. The seals can be found in hydraulics industry supplies for piston rods with 52mm and 50mm dia. as dust wipers. And next to these I put o-rings in to keep the grease inside the strut. You need adapter rings for the seals to position them in the milled nut where the felt was before. The photo below shows the spring loaded damper valve with no backlash to get rid of the knocking on rough airstrips. Still not yet tested on real rough stuff but I am confident ... Cheers Vic Read this topic online here: http://forums.matronics.com/viewtopic.php?p=346704#346704 Attachments: http://forums.matronics.com//files/damper_valve_orig_148.jpg http://forums.matronics.com//files/main_gear_mod_160.jpg http://forums.matronics.com//files/nose_gear_original_889.jpg http://forums.matronics.com//files/nose_gear_mod_127.jpg ________________________________ Message 7 _____________________________________ Time: 06:42:51 PM PST US From: "Chris Wise" Subject: RE: Yak-List: Re: Undercarriage G'Day Vic, Thank for the photos. I have printed them and will check it out later today. Do you have any info on the seals that you bought such as manufacturer and numbers? Cheers, Chris. -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Vic Sent: Sunday, 17 July 2011 10:18 AM Subject: Yak-List: Re: Undercarriage Hi Didier, Chris, for dismantling the struts you may need two special spanners, as you see in the photo above. Didier, you can have them for a while - winter, I think, would be ideal for the job. Maybe we meet in Eggenfelden some day for you to pick them up. Also I made up some sort of shoe horn to help the piston ring over the shoulder in the strut. This is a pipe with 65mm o.d. and 62mm i.d. and ~200mm long cut in two halves. The nose wheel is different by few mms, I can check sizes later. The seals can be found in hydraulics industry supplies for piston rods with 52mm and 50mm dia. as dust wipers. And next to these I put o-rings in to keep the grease inside the strut. You need adapter rings for the seals to position them in the milled nut where the felt was before. The photo below shows the spring loaded damper valve with no backlash to get rid of the knocking on rough airstrips. Still not yet tested on real rough stuff but I am confident ... Cheers Vic Read this topic online here: http://forums.matronics.com/viewtopic.php?p=346704#346704 Attachments: http://forums.matronics.com//files/damper_valve_orig_148.jpg http://forums.matronics.com//files/main_gear_mod_160.jpg http://forums.matronics.com//files/nose_gear_original_889.jpg http://forums.matronics.com//files/nose_gear_mod_127.jpg ________________________________ Message 8 _____________________________________ Time: 08:47:18 PM PST US From: Herb Coussons Subject: Yak-List: Weather Everyone considering OSH Weather here is supposed to be very hot and very humid for the next 2 weeks. Temps in mid 90's and heat index in mid 100's Isolated thunderstorms, but overall not much precip forcast until end of the month. I do not like long range forecasts, but thought this one may be pretty accurate - so prepare appropriately. Dr. Herb Coussons, MD drc@wscare.com 2641 Development Drive Green Bay, WI 54311 Cell 920-639-8434 Work 920-338-6868 Fax 920-338-6869 ________________________________ Message 9 _____________________________________ Time: 08:51:46 PM PST US Subject: Re: Yak-List: Weather From: Eric Wobschall So, no wool coats, then? On Jul 16, 2011, at 11:44 PM, Herb Coussons wrote: > > Everyone considering OSH > Weather here is supposed to be very hot and very humid for the next 2 weeks. > Temps in mid 90's and heat index in mid 100's > Isolated thunderstorms, but overall not much precip forcast until end of the month. > > I do not like long range forecasts, but thought this one may be pretty accurate - so prepare appropriately. > > > Dr. Herb Coussons, MD > drc@wscare.com > 2641 Development Drive > Green Bay, WI 54311 > Cell 920-639-8434 > Work 920-338-6868 > Fax 920-338-6869 > > > > > > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-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/yak-list Browse Digests http://www.matronics.com/digest/yak-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.