Yak-List Digest Archive

Sat 03/05/11


Total Messages Posted: 6



Today's Message Index:
----------------------
 
     1. 01:52 AM - Engine failure (Richard Goode)
     2. 05:24 AM - Re: Engine failure (Eric Wobschall)
     3. 12:50 PM - Re: Re: Yak-List Digest: 6 Msgs - 03/03/11 (Roger Kemp M.D.)
     4. 01:23 PM - Re: Re: Yak-List Digest: 6 Msgs - 03/03/11 (rick@rvairshows.com)
     5. 07:08 PM - Re: Engine failure (Yak Pilot)
     6. 10:13 PM - Re: April 2010 Yak 50 Engine Failure in UK (GreasySideUp)
 
 
 


Message 1


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    Time: 01:52:30 AM PST US
    From: "Richard Goode" <richard.goode@russianaeros.com>
    Subject: Engine failure
    We had a Su-26 that had a ground strike-reasonably hard,and lost about 10 inches from one blade [2-blade]. Against advice the owner just put on a new prop and went flying.About 4 hours later,when taxiing in,after aerobatics,one of the satellite gears in the gearbox broke up and the gearbox locked solid,and this broke 2 of the 4 engine mounts. Had it happened a couple of minutes earlier,at full power,I'm sure the engine would have come out!! Richard Goode Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com


    Message 2


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    Time: 05:24:59 AM PST US
    From: Eric Wobschall <eric@buffaloskyline.com>
    Subject: Re: Engine failure
    I was wondering if the Yak-50 seizure was really sudden. Seems like it may have reached it's seizure somewhat gradually. On Mar 5, 2011, at 4:49 AM, Richard Goode wrote: > We had a Su-26 that had a ground strike-reasonably hard,and lost about 10 inches from one blade [2-blade]. > Against advice the owner just put on a new prop and went flying.About 4 hours later,when taxiing in,after aerobatics,one of the satellite gears in the gearbox broke up and the gearbox locked solid,and this broke 2 of the 4 engine mounts. > Had it happened a couple of minutes earlier,at full power,I=92m sure the engine would have come out!! > > Richard Goode > Rhodds Farm > Lyonshall > Hereford > HR5 3LW > > Tel: +44 (0) 1544 340120 > Fax: +44 (0) 1544 340129 > www.russianaeros.com > > > > >


    Message 3


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    Time: 12:50:31 PM PST US
    From: "Roger Kemp M.D." <viperdoc@mindspring.com>
    Subject: Re: Yak-List Digest: 6 Msgs - 03/03/11
    Guys, Agree with all said. My personal decision to leave the A/C is a mindset that I have considered before leaving the ground. This decision is certainly fluid and it will be made based on the Emergency. Altitude, airspeed, terrain, fire, danger to the unsuspecting, controlled or uncontrolled egress/ejection (granted we don=99t have that luxury) are all things that are be considered prior to stepping over the side. If the =9Cwings off light is lite=9D I=99m probably not going to get out anyway. The Gs and inertia will be such that egress will probably be impossible. The YAK in a fully developed spin is going to be tough to exit also. I think I left the impression that I=99m going to step over the side regardless. If so sorry but that is not the case. My mindset is that of =9CI will use the silk let down if I have to=9D if that unfortunate opportunity presents itself and can be accomplished with the best possible outcome. To say the decision is canned for every EP is not what was intended by the statement. My engine stopping on T.O. 50 feet above the runway with 1500 ft of runway left in the YAK-50 stepping over the side was not even a consideration. Getting the nose down, controlling airspeed (flying the airplane), ensuring gear still were down, a radio call to 2 to abort T.O., electrical system off along with pull the fuel shut off valve, and landing straight ahead were the thoughts that went through my mind in the 3 to 4 seconds from prop stop to roll out. Stepping over the side was not even part of the mental checklist at that point. The circumstances dictate the reaction. In some cases stepping over the side will not be an option. In others, the silk letdown will be. Doc From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Norman Davis Sent: Friday, March 04, 2011 4:06 PM Subject: Yak-List: Re: Yak-List Digest: 6 Msgs - 03/03/11 Hi Guys With regard to the discussion about bail outs versus emergency landing. Mark Bitterlich's comments are spot on. To add my two cents: Practice emergency approaches every chance you get. If you are a sky diver and have jumps under your belt, then consider carefully the jump option. Can you egress safely? Will aircraft end up crashing in a "safe" area? Has the aircraft stopped flying in spite of your control inputs? JUMP!! Case in point: A4 NIGHT catapult shot fully loaded with bombs. Radio and lights lost airborne. Extremely high temperature air impinging on left thigh. Hot air flow reduces with reduced throttle. Flight controls OK, maintaining 500'. CVA making 30 knots to recover returning strike. Cannot bring bombs back aboard. Decision: Chances of surviving ejection on a black ass night in front of carrier doing 30 knots? Pretty slim. Fly a "day approach" pattern to end up alongside LSO about 300'. NORDO, NO LIGHTS. Jettison Bombs on SAFE alongside - gets attention. Pull up and execute day approach, fitting into recovering pattern on CCA. Trap aboard Shut Down in gear. Hot air flow stops on shut down. Piss Off the flight deck crew who have to hook up tractor and pull clear to allow recovery to continue. Time from cat shot to safe recovery: 15 minutes. Explain actions to CVA skipper and CAG - immediately. During explanation, squadron maintenance personnel advise emergency genuine. No lights, no radio and G suit fitting broken to allow hot air from engine into cockpit. Had lots of practice? Yes, most FCLPs (Field Carrier Landing Practice) are conducted at night. Hundreds are completed before carrier quals. Decision right? Go figure. Cheers Norm Davis Cdr USN ret. _____ From: Yak-List Digest Server <yak-list@matronics.com> Sent: Fri, 4 March, 2011 8:59:49 PM Subject: Yak-List Digest: 6 Msgs - 03/03/11 * Online Versions of Today's List Digest Archive Today's complete Yak-List Digest can 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 Yak-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/digestview.php?Style=82701 <http://www.matronics.com/digest/digestview.php?Style=82701&View=html &Chapter 11-03-03&Archive=Yak> &View=html&Chapter 11-03-03&Archive=Yak Text Version: http://www.matronics.com/digest/digestview.php?Style=82701 <http://www.matronics.com/digest/digestview.php?Style=82701&View=txt& Chapter 11-03-03&Archive=Yak> &View=txt&Chapter 11-03-03&Archive=Yak ====================== EMail Version of Today's List Digest Archive ====================== ---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Thu 03/03/11: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:55 AM - Bail outs (Bruce Thomas) 2. 12:16 PM - Re: Re: April 2010 Yak 50 Engine Failure in UK (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E) 3. 12:41 PM - Re: Re: April 2010 Yak 50 Engine Failure in UK (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E) 4. 01:24 PM - Strong 304 chutes (Eric Wobschall) 5. 02:06 PM - Re: Re: April 2010 Yak 50 Engine Failure in UK (Eric Wobschall) 6. 02:27 PM - Re: Re: April 2010 Yak 50 Engine Failure in UK (Roger Kemp M.D.) ________________________________ Message 1 _____________________________________ Time: 12:55:52 AM PST US From: "Bruce Thomas" <bvthomas@bigpond.com> Subject: Yak-List: Bail outs I was taught when the noise stops And cannot be restarted the aircraft now belongs to the insurance company And you look after your butt first and last Bruce ________________________________ Message 2 _____________________________________ Time: 12:16:42 PM PST US Subject: RE: Yak-List: Re: April 2010 Yak 50 Engine Failure in UK From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" <mark.bitterlich@navy.mil> Question: When it seized, did it do any damage to the engine mounts? Mark Bitterlich -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode Sent: Wednesday, March 02, 2011 2:25 PM Subject: RE: Yak-List: Re: April 2010 Yak 50 Engine Failure in UK <richard.goode@russianaeros.com> Yes,he was over the lake district in the north of England which is pretty rough terrain.Initially,the engine continued to run [without any oil] so he thought he could get to Carlisle airfield,but it then seized solid!! Richard Goode Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Stu Sent: 02 March 2011 19:05 Subject: Yak-List: Re: April 2010 Yak 50 Engine Failure in UK A credit to the pilot for bringing his aircraft to the ground safely and walking away from it. However, reflecting on this experience (and one of my own), the pilot's decision to force land vs. bale out troubles me. Traditionally (at least in the U.S.) we get a lot more training on how to force land an aircraft than how to bale out of it. Whereas, in the USSR, DOSAAF students were required to practice and demonstrate proficiency in Yak bale out procedures. Yet the DOSAAF records have many accounts of injury and fatality attributable to pilots' decisions to stay with their aircraft when there was no apparent need to. I suppose that pondering the decision for a split second too long could cost a pilot his life. It seems to me that in most imaginable circumstances the decision can be made beforehand...so as to avoid hesitation in the cockpit. For my part, considering the relatively low value of a Yak or CJ (compared to life), if it is clear that the engine will not restart and with enough altitude and minimal threat to those on the ground, the policy is bale out now and pick up the insurance check later. Stu Nicholson -------- Stewart Nicholson Yak 52 N122GC Read this topic online here: http://forums.matronics.com/viewtopic.php?p=332517#332517 ----------------------------------------------- This message has been scanned for viruses and dangerous content by the Invictawiz MailScanner and is believed to be clean. http://www.invictawiz.com ----------------------------------------------- ________________________________ Message 3 _____________________________________ Time: 12:41:08 PM PST US Subject: RE: Yak-List: Re: April 2010 Yak 50 Engine Failure in UK From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" <mark.bitterlich@navy.mil> Without a doubt a very interesting discussion and one where valuable information can be circulated in order for everyone to make their own personal decision based on accurate information. But even in the military it remains just that -- a personal decision -- and it remains one with these aircraft as well. Certainly when the "WING OFF" light comes on, the decision is a no-brainer. However there are a lot of other factors that have to be considered as well. Jumping out of your airplane when it is over a highly residential area might be the best thing to do in order to save your own life, but what of others? Is taking the time to consider that factor less than smart? Possibly. However I doubt anyone would condemn a pilot for at least considering that aspect of the decision. In fact, MANY pilots who decided to stay with their aircraft are now referred to as "Hero's", as well they should be. So I have to respectfully disagree. I think you can prepare "canned situations" where you can make the decision beforehand, but just like going into battle.... a lot of decisions have to be made right on the spot and sometimes there are factors that require you to think a little bit before you just turn upside down and release your seatbelt. Mark Bitterlich N50YK -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Stu Sent: Wednesday, March 02, 2011 2:05 PM Subject: Yak-List: Re: April 2010 Yak 50 Engine Failure in UK A credit to the pilot for bringing his aircraft to the ground safely and walking away from it. However, reflecting on this experience (and one of my own), the pilot's decision to force land vs. bale out troubles me. Traditionally (at least in the U.S.) we get a lot more training on how to force land an aircraft than how to bale out of it. Whereas, in the USSR, DOSAAF students were required to practice and demonstrate proficiency in Yak bale out procedures. Yet the DOSAAF records have many accounts of injury and fatality attributable to pilots' decisions to stay with their aircraft when there was no apparent need to. I suppose that pondering the decision for a split second too long could cost a pilot his life. It seems to me that in most imaginable circumstances the decision can be made beforehand...so as to avoid hesitation in the cockpit. For my part, considering the relatively low value of a Yak or CJ (compared to life), if it is clear that the engine will not restart and with enough altitude and minimal threat to those on the ground, the policy is bale out now and pick up the insurance check later. Stu Nicholson -------- Stewart Nicholson Yak 52 N122GC Read this topic online here: http://forums.matronics.com/viewtopic.php?p=332517#332517 ________________________________ Message 4 _____________________________________ Time: 01:24:50 PM PST US From: Eric Wobschall <eric@buffaloskyline.com> Subject: Yak-List: Strong 304 chutes I have two Strong 304 Warbird Seat packs (standard harness). I purchased them new about this time last year, at which time they had a fresh pack. With the new 6 month rule and off-season, they haven't been re-packed since then. These have had only light use (especially the rear chute). OD green, and has a blue zip-on travel one inch cushion and a carry bag. I'd like to sell them together. Contact me off list. Thanks. Eric D. Wobschall Buffalo Skyline Buffalo-Lancaster Airport (KBQR): 4343 Walden Avenue Lancaster, NY 14086 Office: 2120 Maple Road Williamsville, NY 14221-1922 716.208.5460 ________________________________ Message 5 _____________________________________ Time: 02:06:25 PM PST US Subject: Re: Yak-List: Re: April 2010 Yak 50 Engine Failure in UK From: Eric Wobschall <eric@buffaloskyline.com> Also, we're so conditioned to land the airplane and it's just counter-intuitive to jump. On fire, uncontrollable or over impossible terrain seem like no-brainers. Other situations... tougher. On Mar 3, 2011, at 3:24 PM, Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E wrote: > > Without a doubt a very interesting discussion and one where valuable > information can be circulated in order for everyone to make their own > personal decision based on accurate information. > > But even in the military it remains just that -- a personal decision -- > and it remains one with these aircraft as well. Certainly when the > "WING OFF" light comes on, the decision is a no-brainer. However there > are a lot of other factors that have to be considered as well. Jumping > out of your airplane when it is over a highly residential area might be > the best thing to do in order to save your own life, but what of others? > Is taking the time to consider that factor less than smart? Possibly. > However I doubt anyone would condemn a pilot for at least considering > that aspect of the decision. In fact, MANY pilots who decided to stay > with their aircraft are now referred to as "Hero's", as well they should > be. > > So I have to respectfully disagree. I think you can prepare "canned > situations" where you can make the decision beforehand, but just like > going into battle.... a lot of decisions have to be made right on the > spot and sometimes there are factors that require you to think a little > bit before you just turn upside down and release your seatbelt. > > Mark Bitterlich > N50YK > > -----Original Message----- > From: owner-yak-list-server@matronics.com > [mailto:owner-yak-list-server@matronics.com] On Behalf Of Stu > Sent: Wednesday, March 02, 2011 2:05 PM > To: yak-list@matronics.com > Subject: Yak-List: Re: April 2010 Yak 50 Engine Failure in UK > > > A credit to the pilot for bringing his aircraft to the ground safely and > walking away from it. However, reflecting on this experience (and one > of my own), the pilot's decision to force land vs. bale out troubles me. > > > Traditionally (at least in the U.S.) we get a lot more training on how > to force land an aircraft than how to bale out of it. Whereas, in the > USSR, DOSAAF students were required to practice and demonstrate > proficiency in Yak bale out procedures. Yet the DOSAAF records have > many accounts of injury and fatality attributable to pilots' decisions > to stay with their aircraft when there was no apparent need to. > > I suppose that pondering the decision for a split second too long could > cost a pilot his life. It seems to me that in most imaginable > circumstances the decision can be made beforehand...so as to avoid > hesitation in the cockpit. For my part, considering the relatively low > value of a Yak or CJ (compared to life), if it is clear that the engine > will not restart and with enough altitude and minimal threat to those on > the ground, the policy is bale out now and pick up the insurance check > later. > > Stu Nicholson > > -------- > Stewart Nicholson > Yak 52 N122GC > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=332517#332517 > > > > > > > > > > > > > > > ________________________________ Message 6 _____________________________________ Time: 02:27:32 PM PST US Subject: Re: Yak-List: Re: April 2010 Yak 50 Engine Failure in UK From: "Roger Kemp M.D." <viperdoc@mindspring.com> Test will the IPAD response fly or not? This is a test no reply need. But it's still a "no brainer" in most circumstances unless you don't wear a chute. Doc Sent from my iPad On Mar 3, 2011, at 2:24 PM, "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" <mark.bitterlich@navy.mil> wrote: > > Without a doubt a very interesting discussion and one where valuable > information can be circulated in order for everyone to make their own > personal decision based on accurate information. > > But even in the military it remains just that -- a personal decision -- > and it remains one with these aircraft as well. Certainly when the > "WING OFF" light comes on, the decision is a no-brainer. However there > are a lot of other factors that have to be considered as well. Jumping > out of your airplane when it is over a highly residential area might be > the best thing to do in order to save your own life, but what of others? > Is taking the time to consider that factor less than smart? Possibly. > However I doubt anyone would condemn a pilot for at least considering > that aspect of the decision. In fact, MANY pilots who decided to stay > with their aircraft are now referred to as "Hero's", as well they should > be. > > So I have to respectfully disagree. I think you can prepare "canned > situations" where you can make the decision beforehand, but just like > going into battle.... a lot of decisions have to be made right on the > spot and sometimes there are factors that require you to think a little > bit before you just turn upside down and release your seatbelt. > > Mark Bitterlich > N50YK > > -----Original Message----- > From: owner-yak-list-server@matronics.com > [mailto:owner-yak-list-server@matronics.com] On Behalf Of Stu > Sent: Wednesday, March 02, 2011 2:05 PM > To: yak-list@matronics.com > Subject: Yak-List: Re: April 2010 Yak 50 Engine Failure in UK > > > A credit to the pilot for bringing his aircraft to the ground safely and > walking away from it. However, reflecting on this experience (and one > of my own), the pilot's decision to force land vs. bale out troubles me. > > > Traditionally (at least in the U.S.) we get a lot more training on how > to force land an aircraft than how to bale out of it. Whereas, in the > USSR, DOSAAF students were required to practice and demonstrate > proficiency in Yak bale out procedures. Yet the DOSAAF records have > many accounts of injury and fatality attributable to pilots' decisions > to stay with their aircraft when there was no apparent need to. > > I suppose that pondering the decision for a split second too long could > cost a pilot his life. It seems to me that in most imaginable > circumstances the decision can be made beforehand...so as to avoid > hesitation in the cockpit. For my part, considering the relatively low > value of a Yak or CJ (compared to life), if it is clear that the engine > will not restart and with enough altitude and minimal threat to those on > the ground, the policy is bale out now and pick up the insurance check > later. > > Stu Nicholson > > -------- > Stewart Nicholson > Yak 52 N122GC > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=332517#332517 > > > > > > > > > > > > > > > http://www.matronics.com/Navigator?Yap; --> http:/======================= = <http://forums.matronics.com> <http://forums.matronics.com> <http://forums.matronics.com> <http://forums.matronics.com> - Navigator to browse List Un/Subscription, Browse, Chat, FAQ, http://www.matronics.com/Navigator?Yak-List


    Message 4


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    Time: 01:23:09 PM PST US
    Subject: Re: Yak-List Digest: 6 Msgs - 03/03/11
    From: rick@rvairshows.com
    Rmx5aW5nIGEgMyBtaWxsaW9uIGRvbGxhciB3dyAyIGZpZ2h0ZXIgd2l0aG91dCBodWxsIGluc3Vy YW5jZSwgb3duZWQgYnkgYW5vdGhlciwgd2hlbiB0aGUgTWVybGluIGJsZXcuIEkga25ldyBJIHdv dWxkIGJlIGtpbGxlZCBieSB0aGUgb3duZXIgaWYgSSBqdW1wZWQsIHNvIGRlYWQgc3RpY2tlZCB0 aGUgc2ljayBTcGl0IG9udG8gYSBHcmF2ZWwgcGF0aC4gU2l0dGluZyBhbW9uZyB0ZXN0IHBpbG90 cywgd2UgYWxsIGFncmVlZCBhZnRlciB0aGF0IGluY2lkZW50IHdpdGggdGhlIG93bmVyIHRoYXQg d2Ugd291bGQgb25seSBiYWlsIGlmIHRoZXJlIHdhcyBmaXJlIG9yIGxvc3Mgb2YgY29udHJvbC4g VGhhdCdzIHdoYXQgeW91IG93ZSB0aGVzZSB0cmVhc3VyZXMgaWYgeW91IGFncmVlIHRvIGZseSB0 aGVtLiBJbiBteSBzdWtob2ksIEkgd2lsbCBiYWlsIHVubGVzcyBJIGhhdmUgY2xvc2VseSBleGFt aW5lZCB0aGUgbGFuZGluZyBhcmVhLg0KTm90ZSB0aGVyZSBhcmUgbWFueSByZWFzb25zIHdoeSBh IGhlbG1ldCBzaG91bGQgYmUgcGFydCBvZiBwYXJhY2h1dGUgd2Vhci4gDQpSaWNrIFZPTEtFUg0K U2VudCBmcm9tIG15IFZlcml6b24gV2lyZWxlc3MgQmxhY2tCZXJyeQ0KDQotLS0tLU9yaWdpbmFs IE1lc3NhZ2UtLS0tLQ0KRnJvbTogIlJvZ2VyIEtlbXAgTS5ELiIgPHZpcGVyZG9jQG1pbmRzcHJp bmcuY29tPg0KU2VuZGVyOiBvd25lci15YWstbGlzdC1zZXJ2ZXJAbWF0cm9uaWNzLmNvbQ0KRGF0 ZTogU2F0LCA1IE1hciAyMDExIDE0OjQ3OjMxIA0KVG86IDx5YWstbGlzdEBtYXRyb25pY3MuY29t Pg0KUmVwbHktVG86IHlhay1saXN0QG1hdHJvbmljcy5jb21TdWJqZWN0OiBSRTogWWFrLUxpc3Q6 IFJlOiBZYWstTGlzdCBEaWdlc3Q6IDYgTXNncyAtIDAzLzAzLzExDQoNClRoaXMgaXMgYSBtdWx0 aXBhcnQgbWVzc2FnZSBpbiBNSU1FIGZvcm1hdC4NCg0K


    Message 5


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    Time: 07:08:18 PM PST US
    From: Yak Pilot <yakplt@yahoo.com>
    Subject: Re: Engine failure
    Well this is exactly what I was talking about Richard, and you've given thi s advice before.=C2- =C2- My point is simply this.... an engine was run without oil until it seized. =C2- As you said, several pistons were welded to the cylinders.=C2- I'd call this a pretty dramatic example of an engine that locked up.=C2- =C2- The prop was spinning and developing power at the time.=C2- Instead of th e engine coming out of the mounts, the mounts were not even damaged.=C2- Instead, the planetary gears let go and the prop continued to windmill.=C2 - =C2- This tells me that it is hard to really know WHAT is going to happen.=C2- Obviously if the parts in the engine hold together and everything stops ve ry quickly, engine mounts can fail as they become the weak link.=C2- On t he other hand, it is very possible that if the engine was operating at full power, the gears that let go could have been crushed into powder and the p rop would have ended up spinning around just like the one you just reported on did.=C2- =C2- I would think that there must be some sort of data on this someplace.=C2- Radial engines have been shot to pieces for many years.=C2- They are ren owned for running as long as they have oil in them even with cylinders blas ted off by anti-aircraft fire.=C2- I've not seen reports of them busting out of their mounts and departing the aircraft.=C2- =C2- A lot of these Housai and M-14 engines have failed in many ways, and I have yet to hear of one instance of the engine coming out of the mounts and dep arting the aircraft.=C2- =C2- This is not to say that you are wrong.=C2- This is not to say I have more experience than you do.=C2- I very clearly do NOT.=C2- However, being an engineering mentality, I like to see the data when something like this i s said.=C2- =C2- Prop strikes on M-14 engines is a very nebulous topic.=C2-Advice runs the full gamut and depending on who you talk to, if you scrape the paint on th e blades you need a full engine tear-down, while many others take a more pr agmatic viewpoint.=C2- Clearly in the matter of prop strikes, how much yo u grind off and exactly how it happened come into play with that decision. =C2- I've read what you have written on prop strikes, and also what other s have said as well, and many of them I consider experts too.=C2- Then th ere are those that always advise to err on the side of safety... although t hey have no personal expertise what-so-ever.=C2- I've looked into this su bject and studied it for about a month now very carefully and the real answ er I have come up with is:=C2- IT DEPENDS.=C2- =C2- But coming back to the topic at hand .... have we any documented cases of M -14 engines failing under power and ripping themselves right out of the mou nts?=C2- Failing M-14's, what about any other radials of any era, model, or design?=C2- I'm not debating here, I am really just very interested in the facts.=C2- =C2- Mark Bitterlich --- On Sat, 3/5/11, Richard Goode <richard.goode@russianaeros.com> wrote: From: Richard Goode <richard.goode@russianaeros.com> Subject: Yak-List: Engine failure We had a Su-26 that had a ground strike-reasonably hard,and lost about 10 i nches from one blade [2-blade]. Against advice the owner just put on a new prop and went flying.About 4 hou rs later,when taxiing in,after aerobatics,one of the satellite gears in the gearbox broke up and the gearbox locked solid,and this broke 2 of the 4 en gine mounts. Had it happened a couple of minutes earlier,at full power,I=99m sure the engine would have come out!! =C2- Richard Goode Rhodds Farm Lyonshall Hereford HR5 3LW =C2- Tel:=C2- +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com =C2-


    Message 6


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    Time: 10:13:33 PM PST US
    Subject: Re: April 2010 Yak 50 Engine Failure in UK
    From: "GreasySideUp" <greasysideup@hotmail.com>
    Catastrophic failure of the engine and greater than 1k of altitude I am out of the Yak unless I am over the field and can make a landing. Greater than 2k I will try a restart until 2k. If there is a catastrophic failure of the motor above 2k I will get out as high as I can, with the caveat of making a few radio calls on guard with my position and to launch the coast guard and still being out by 2k. 500'to 1k upright in control over trees - I am out of the plane. Less than 500' unless I have the airspeed to zoom I am staying with the plane. I know it takes me about 3-5 seconds to get out of the plane. Over populated area - try to steer away and still bail. I don't have stats but there are lots of airplanes that have crashed into houses where the only fatalities were the pilots. I recall 0 instances where a pilot has walked away from putting a parachute equipped plane successfully on the road in a residential area. I'm sure there are some, but there are quite a few parachute equipped pilots who have died in residential areas. If it is between the trees and a park full of nuns, aim for the trees and bail out above 500'. Training in Cessnas teaches to land off field because there is no other choice. In chute equipped aircraft I have found the decision usually depends on the first instructors attitude and little else. Very few people have an absolute decision matrix of when they will get out nor anything to base it on. If you wear a chute, I think you need a plan on when you are going to use it. If you are currently wearing a parachute and have never been on a skydive, I think you are wrong. Spend the hundred bucks and go on a tandem dive. Ask to be the one that pulls the chord and steers and tell him a few goals you would like to accomplish with the training rather than just going for a "ride". The confidence it builds will be a great help. I know a few who have been in GA aircraft who have landed off field and been ok, I know a few who have died. I know of 2 personally who have bailed and been fine and there are countless stories of those who could have bailed who are no longer with us. Every so often, practice your emergency egress. Unless you have plenty of altitude I think rolling upside down is not a great idea - especially if you do aerobatics with primarily positive G's. If you have the plane trimmed for upright flight and you roll upside down and let go with the intent to get out, I think bad things will happen. If you have other thoughts on why this is a good idea I am all ears, but overall I think this is a terrible idea unless you have significant time in hands off, trimmed inverted flight. My plan is to trade airspeed for altitude, trim for a slight climb to level at approximately 70 knots (Yak 50), canopy open, belt off, diving out the right side one foot on the seat and one off the opposite side to dive below the elevator. Left hand is protecting my nugget, and right hand moving towards the rip cord. Arch, look for the plane and pull. Canopy, visor, mask, seatkit, LPU, 4line, steer, prepare, land. (Military checklist for operating the chute. Delete as necessary) If you are bailing out over trees, use your hands to cover your face and eyes. If you are going to hit power lines, think skinny. Nugget to the side and arms up on the risers with palms facing out. Over water, act like you are going to hit the ground, bend your knees and roll on your side on landing just in case the water is shallow. Next time you have the chute repacked, ask if you can pull the chord while wearing the chute and feel the force it takes to pull. Also check the type of chute you have and ask the rigger for a few lessons on how to use it. Those guys are generally more than happy to share a little time if it will help save your life. What ever you are going to do, have a plan. If you wear a chute and have no idea when you might use it I challenge you to come up with a matrix of your own and have a reason for what you are doing. Knock on wood implied. -j Read this topic online here: http://forums.matronics.com/viewtopic.php?p=332873#332873




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