---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Thu 09/12/13: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:39 AM - Re: Upcoming RPA T-Shirt Design (alikatz@mbay.net) 2. 11:03 AM - Re: Re: Hydraulic Lock Prevention (Bitterlich, Mark G CIV NAVAIR, WD) 3. 11:08 AM - Re: Re: Hydraulic Lock Prevention (Bitterlich, Mark G CIV NAVAIR, WD) 4. 02:31 PM - Re: Hydraulic Lock Prevention (Vic) 5. 04:03 PM - Re: Re: Hydraulic Lock Prevention (Joe Howse) ________________________________ Message 1 _____________________________________ Time: 05:39:46 AM PST US From: alikatz@mbay.net Subject: Re: Yak-List: Upcoming RPA T-Shirt Design Mr. Fox, Awesome, let me know when they're available! Best Regards Jim Quoting Byron M Fox ________________________________ Message 2 _____________________________________ Time: 11:03:15 AM PST US From: "Bitterlich, Mark G CIV NAVAIR, WD" Subject: RE: Yak-List: Re: Hydraulic Lock Prevention I own Les Crowder's test aircraft, and it had the valve cover drains and scavenge pump. It had (and I still have stored) new valve covers that allowed drainage and then subsequent pumping back to the oil tank. It did work well, however it added a lot of hoses and clamps that increased the chances for an oil leak that would not be visible from the cockpit, so I removed all of it and went back to stock. It did not include an oil shut off valve. His hydraulic toe brake conversation using Cleveland wheels and brakes was SUPERB and are still in use. Mark -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Michael B. Cavanagh Sent: Tuesday, September 10, 2013 22:38 Subject: Re: Yak-List: Re: Hydraulic Lock Prevention I BELIEVE THE LATE LES CROWDER HAD VALVE COVER DRAINS, AN OIL SHUTOFF VALVE, AN ELECTRIC POST SHUTDOWN SCAVENGE PUMP. AND INTAKE DRAINS. WORKED GOOD. LOTS OF WORK. On Sep 10, 2013, at 7:29 PM, bill wade wrote: Hi guys and gals I'm doing my condition inspection now and on the to do list is adjust the valves well after draining all the oil and removing the oil hoses let drip a couple days time for the valves remove the covers and another quart or two of oil from the lower cylinders valve covers. So my question is how do you know if its the oil pump ball seat or a valve guide that's not quite up to par creating the hydraulic lock?. All this talk about ball valves after the oil tank and before the oil pump maybe we need to get the oil out of the push rod tubes? Has anyone put a drain tube on the valve covers and if so the results? Bill Wade N4450Y From: Michael B. Cavanagh To: yak-list@matronics.com Sent: Tuesday, September 10, 2013 7:05 PM Subject: Re: Yak-List: Re: Hydraulic Lock Prevention LOOKS REALLY NICE! I PUT A BALL VALVE ON MY RYAN STA YEARS AGO WHICH WORKED WELL. I WAS LUCKY THE OIL LINE WAS LOCATED IN A POSITION WHERE THE BALL VALVE CONTROL HANDLE WAS ACCESSED AT THE REAR OF THE COWLING. IN THE OFF POSITION THE HANDLE STUCK OUT IN PLAIN SIGHT, AND I ATTACHED A RED STREAMER TO IT AS AN ADDED PRECAUTION. I KNOW ANOTHER GUY WHO DID THE SAME THING BUT HAD A DOOR IN THE COWLING WHICH COULD NOT BE CLOSED WITH THE VALVE CLOSED. (CONTROL HANDLE STICKING OUT) YOURS LOOKS VERY NICE. MIKE On Sep 10, 2013, at 2:04 PM, Vic wrote: > > Wot, no comments - still ?? > Please understand, I dont sell any sets but wanted to share my idea with those who like the purely mechanical way. So feel free to include this idea of unlocking the oil valve from the fuel shut-off by Bowden cable in your own design that may look quite differently. But then, you will need some metal working facilities...... > > Cheers > Vic > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=408376#408376 > > > > > > > > > > t; href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List href="http://forums.matronics.com/">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/contribution ________________________________ Message 3 _____________________________________ Time: 11:08:08 AM PST US From: "Bitterlich, Mark G CIV NAVAIR, WD" Subject: RE: Yak-List: Re: Hydraulic Lock Prevention Les Crowder's modification included specially made valve covers that had hose outlets cast into them. A short rubber hose then connected these together much like some P&W radial engines. The engine sump drain was also connected into this whole design where then an electric pump returned all this oil up to the main tank. You could turn on the master and hit this switch and listen to it as it pumped the oil back. When there was no more oil, the pump would speed up and you knew it was done. Worked extremely well. However, there was no oil shut-off valve, so you just went out and did this little exercise every so often . I wrote another message on this already (sorry) but then read this and decided to go into more detail. Mark -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of bill wade Sent: Tuesday, September 10, 2013 20:55 Subject: Re: Yak-List: Re: Hydraulic Lock Prevention Wow just sitting here thinking about the valve guides and the oil would go out the exhaust pipe or intake tube no hydraulic lock but still a mess. Bill Wade From: bill wade Sent: Tuesday, September 10, 2013 8:29 PM Subject: Re: Yak-List: Re: Hydraulic Lock Prevention Hi guys and gals I'm doing my condition inspection now and on the to do list is adjust the valves well after draining all the oil and removing the oil hoses let drip a couple days time for the valves remove the covers and another quart or two of oil from the lower cylinders valve covers. So my question is how do you know if its the oil pump ball seat or a valve guide that's not quite up to par creating the hydraulic lock?. All this talk about ball valves after the oil tank and before the oil pump maybe we need to get the oil out of the push rod tubes? Has anyone put a drain tube on the valve covers and if so the results? Bill Wade N4450Y From: Michael B. Cavanagh Sent: Tuesday, September 10, 2013 7:05 PM Subject: Re: Yak-List: Re: Hydraulic Lock Prevention LOOKS REALLY NICE! I PUT A BALL VALVE ON MY RYAN STA YEARS AGO WHICH WORKED WELL. I WAS LUCKY THE OIL LINE WAS LOCATED IN A POSITION WHERE THE BALL VALVE CONTROL HANDLE WAS ACCESSED AT THE REAR OF THE COWLING. IN THE OFF POSITION THE HANDLE STUCK OUT IN PLAIN SIGHT, AND I ATTACHED A RED STREAMER TO IT AS AN ADDED PRECAUTION. I KNOW ANOTHER GUY WHO DID THE SAME THING BUT HAD A DOOR IN THE COWLING WHICH COULD NOT BE CLOSED WITH THE VALVE CLOSED. (CONTROL HANDLE STICKING OUT) YOURS LOOKS VERY NICE. MIKE On Sep 10, 2013, at 2:04 PM, Vic wrote: > > Wot, no comments - still ?? > Please understand, I dont sell any sets but wanted to share my idea with those who like the purely mechanical way. So feel free to include this idea of unlocking the oil valve from the fuel shut-off by Bowden cable in your own design that may look quite differently. But then, you will need some metal working facilities...... > > Cheers > Vic > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=408376#408376 > > t; http://www.matro://forums.matronics.com/" target="_blank" rel="nofollow">http://forums.========= ________________________________ Message 4 _____________________________________ Time: 02:31:17 PM PST US Subject: Yak-List: Re: Hydraulic Lock Prevention From: "Vic" Hello, Id be very interested to hear if this valve cover drain showed some reduced oil consumption. Basically there are only two ways for oil loss : Via the piston rings or via the valve stems. Maybe someone knows what Les Crowders experiences were in this respect ? Vic Read this topic online here: http://forums.matronics.com/viewtopic.php?p=408525#408525 ________________________________ Message 5 _____________________________________ Time: 04:03:25 PM PST US From: "Joe Howse" Subject: Re: Yak-List: Re: Hydraulic Lock Prevention Hello >From Joe I worked with Les Crowder several years ago, copied his ideas on the valve covers except I had new ones machined from aluminum with a boss for drilling and tapping for the drain fittings and piped to a recovery pump. worked quite well except no way to drain all the oil from the lower cylinder rocker boxes as the valve guides were lower than the fittings on the covers Also worked with Les on th SS slip joint exhaust systems he instigated, they were beautiful. Joe -----Original Message----- From: Vic Sent: Thursday, September 12, 2013 2:29 PM Subject: Yak-List: Re: Hydraulic Lock Prevention Hello, Id be very interested to hear if this valve cover drain showed some reduced oil consumption. Basically there are only two ways for oil loss : Via the piston rings or via the valve stems. Maybe someone knows what Les Crowders experiences were in this respect ? Vic Read this topic online here: http://forums.matronics.com/viewtopic.php?p=408525#408525 ------------------------------------------------------------------------------------- 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.