---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Wed 07/17/13: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:09 AM - Re: Re: Elusive Slow Roll in Yak 52 (gord) 2. 06:34 AM - OSH room (cjpilot710@aol.com) 3. 08:58 AM - Re: Engine teardown after prop strike Questions (Bitterlich, Mark G CIV NAVAIR, WD) ________________________________ Message 1 _____________________________________ Time: 06:09:19 AM PST US From: "gord" Subject: RE: Yak-List: Re: Elusive Slow Roll in Yak 52 >From your post .........."Right now I'm experimenting with various entry speeds to see which ones allow me to achieve momentary knife edge. I really don't think the Yak 52 can hold it very long, but that's why I'm asking if someone can comment on this observation. Perhaps with better technique holding knife edge is achievable!" Try knife edge flight. Roll to the left 90 degrees and see how long you can hold it. Then roll to the right 90 degrees and see hold long you can hold it. The best side is the one you need at the 270 degree roll point to keep the nose up completing the roll. -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of migjockey Sent: July-16-13 11:34 PM Subject: Yak-List: Re: Elusive Slow Roll in Yak 52 Thanks for the reply. Whenever I practice, I try to be at 3,000 AGL or higher. If I'm focusing on spins, especially inverted ones, I start out at 6,000 AGL. No point giving up that valuable altitude by starting low. It's analogous to leaving that gas behind when filling up for a long cross country. I generally roll right in the Yak due to the rotation of the engine. I recall seeing a video online of someone doing a series of "fast" slow rolls and it looked like he had it nailed! That nose hardly moved and went around in relatively small circles just above the horizon. If anyone knows where I can find that video again, I'd be very appreciative. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=404804#404804 ________________________________ Message 2 _____________________________________ Time: 06:34:04 AM PST US From: cjpilot710@aol.com Subject: Yak-List: OSH room Well, I have not gotten a reply on who I am supposed to room with at OSH. I now have a chance for an AC room at the dorms. I want to honor my first OK because I know that someone may be depending on me to hold up my part. However I seem to remember an e-mail or comment here on the list that some OSH housing plans had gone amuck. It might have been one that I had OKed months ago. DOES ANYONE OUT THERE KNOW WHERE I, AM TO GO? (This is so embarrassing) Jim "Pappy" Goolsby ________________________________ Message 3 _____________________________________ Time: 08:58:14 AM PST US Subject: RE: Yak-List: Engine teardown after prop strike Questions From: "Bitterlich, Mark G CIV NAVAIR, WD" Doc, Do whatever you want to do. Subject closed. Mark Bitterlich -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp M.D. Sent: Tuesday, July 16, 2013 20:16 Subject: Re: Yak-List: Engine teardown after prop strike Questions --> Mark, I agree with your comments but how do you verify that the Idler gears on the super charger and the accessory spider gears do not have cracked or chipped teeth. Have to crack the supercharger and accessory case for that. The nose case is simple. The rest is a pain in the ass. Those damned air start lines are a real pill to deal with. Doc Sent from my iPad On Jul 15, 2013, at 3:07 PM, "Bitterlich, Mark G CIV NAVAIR, WD" wrote: > --> > > If the timing on the engine is OK, 90% of the stuff you just listed is unnecessary Doc. However, it is of course your call! That said, my whole point all along is that every situation differs and that needs to be taken into consideration. There is no "ONE ANSWER" and we should stay away from any document that promotes that way of thinking. > > Mark > > > -----Original Message----- > From: owner-yak-list-server@matronics.com > [mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp > Sent: Monday, July 15, 2013 13:59 > To: yak-list@matronics.com > Subject: RE: Yak-List: Engine teardown after prop strike Questions > > > No Mark I am not implying total tear down but to access the accessry drive shaft, inspect and magnaflux or dye penetrate the gear box and do a master crank run out your have to take the nose case off the engine. The baffles will have to be removed so you can take the air start lines off to seperate the supercharger case from the crank case. The intake tubes and the exhaust manifold has to be removed. The Oil Sump has to be removed. You can try to leave the carb on but you will find out that to pull the supercharger and to seperate the accessory case all of the attached accessories need to be out of your way. Since you want to look at the journals on the crank too the cylinders need to come off. No the rockers do not need to be pulled but to get to the base of the connecting rod the cylinders need to come off. Now to inspect the accessory drive shaft and the super charger idler gear the super charger section and the accessory drive section are going to have to be seperated.! T! > o do that the air lines from the spider (air start distributor) have to come off. It is a bit ill managable if you do not. You can try to leave the mags and the compressor on but you will be cursing yourself for trying that after about an hour. Yes you can do it though. > I've been there and I have the damned T shirt. >> From my stand point if I am going that far why not pull the whole damned thing down so I can see the teeth and dye penetrate all of the gears in the gear box and the accessory drive along with the crown gear on the crank shaft, the idler gear that drive the timing cam plate, the accessory gear for the prop governor. > Therer is no real simple easy way to do this with out tearing the engine down. Since mine plopped down on the ground I want to look at the cylinder base studs, the crank case through studs for the mounting ring and the cylinder head baffle mounting studs. Not everybody will require that since 90% of the M-14's flying have a protruding nose wheel to protect them when the gear collapses. > There is more to mine than most so that is for sure. > I am not implying that everyone should have to completely tear one down. Mine is at the extreme. > I am not going into how the metal got in the original engine that is at the began this saga. Yes, the plan is to let Monty take this one apart because I am tired of tearing M-14's down and putting them back togather. > Like farts, man, there are loud oderless and on the other end there are silent but deadly ones. There is a spectrum across the bell shaped curve. In this case, since this engine will be pulling my rosey pink eventually, I want it right. > By the way there was nothing wrong with this engine after it was reassembles before it took the grass field slide. Don't really expect anything to be wrong with it this time either but I need to go through the exercise. > Doc > > -----Original Message----- >> From: "Bitterlich, Mark G CIV NAVAIR, WD" >> Sent: Jul 15, 2013 10:17 AM >> To: yak-list@matronics.com >> Subject: RE: Yak-List: Engine teardown after prop strike Questions >> >> --> >> >> Since you checked back in, I will reply to your comment Doc. >> >> You take a very interesting point of view regarding your "rosy red pink". You are suggesting that safety dictates a total tear down for the purpose of safety. >> ------------------------------------------------------------------------------------- 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.