---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Thu 12/16/10: 27 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:39 AM - Yak 18T Parts (Anthony Hudacek) 2. 03:09 AM - RF interference (Scott Poehlmann) 3. 04:07 AM - Re: RF interference (Eric Wobschall) 4. 04:11 AM - Re: RF interference (Hans Oortman) 5. 05:34 AM - Re: RF interference (A Dennis Savarese) 6. 05:45 AM - Re: Yak 18T Parts (A Dennis Savarese) 7. 06:51 AM - Chinese L-7 (George Coy) 8. 07:09 AM - Re: Chinese L-7 (Didier Blouzard) 9. 07:11 AM - Re: Chinese L-7 (Eric Wobschall) 10. 07:28 AM - Re: Chinese L-7 (George Coy) 11. 08:14 AM - Marvel Mystery Oil (Thomas Smith) 12. 08:24 AM - Re: Marvel Mystery Oil (A Dennis Savarese) 13. 08:25 AM - Re: Chinese L-7 (Tom Elliott) 14. 08:35 AM - Weight & Balance (Thomas Smith) 15. 08:43 AM - Re: Chinese L-7 (Roger Kemp M.D.) 16. 08:52 AM - Re: Chinese L-7 (RICHARD VOLKER) 17. 08:58 AM - Re: Chinese L-7 (Richard Goode) 18. 09:25 AM - Re: Chinese L-7 (Roger Kemp M.D.) 19. 09:44 AM - Re: Chinese L-7 (George Coy) 20. 10:39 AM - Re: RF interference (Roger Kemp M.D.) 21. 01:58 PM - Re: Chinese L-7 (keithmckinley) 22. 03:05 PM - Re: Chinese L-7 (LawnDart) 23. 03:24 PM - Re: Chinese L-7 (Eric Wobschall) 24. 04:07 PM - Yak 18T parts (Anthony Hudacek) 25. 06:59 PM - Re: Chinese L-7 (Matt Dralle) 26. 07:51 PM - Re: Chinese L-7 (cjpilot710@aol.com) 27. 08:36 PM - Re: Chinese L-7 (Eric Wobschall) ________________________________ Message 1 _____________________________________ Time: 02:39:55 AM PST US From: Anthony Hudacek Subject: Yak-List: Yak 18T Parts Hi all, - Does anyone have an air connection-cover for my 18T. Also are the other Y ak's the same? - Thank you, - Ant.=0A=0A=0A ________________________________ Message 2 _____________________________________ Time: 03:09:29 AM PST US From: Scott Poehlmann Subject: Yak-List: RF interference Hi All, I am aware this has been discussed before, but as the problem now effects my own airplane, I have am a bit more attentive... I have a Yak 55M with an auto-plug conversion. The conversion has been in place for about 3 years now (roughly 400 hours). I am now getting RF interference picked up in the Briz radio from the mags/plug wires. At least I assume that is the source, as it is RPM dependent. It has been present since installation, but has been gradually getting worse over the past year or so. I assume that there is a shielding issue either at the mag connection or along the wires somewhere. My question to you is where should I start to look at trouble shooting this issue, and how do I go about fixing it (shy of completely replacing the plug wires, which I'd prefer not to do... But will do if need be...)? Any thoughts you might have on the matter would be appreciated. Thanks, Scott Poehlmann Yak 55M N155YK ________________________________ Message 3 _____________________________________ Time: 04:07:28 AM PST US From: Eric Wobschall Subject: Re: Yak-List: RF interference Could the tach generator be an issue? Also wondering if the dielectric properties of the plug wires are changing due to long term heat exposure. On Dec 16, 2010, at 6:06 AM, Scott Poehlmann wrote: > > Hi All, > > I am aware this has been discussed before, but as the problem now > effects my own airplane, I have am a bit more attentive... > > I have a Yak 55M with an auto-plug conversion. The conversion has > been in place for about 3 years now (roughly 400 hours). I am now > getting RF interference picked up in the Briz radio from the mags/ > plug wires. At least I assume that is the source, as it is RPM > dependent. It has been present since installation, but has been > gradually getting worse over the past year or so. I assume that > there is a shielding issue either at the mag connection or along the > wires somewhere. My question to you is where should I start to look > at trouble shooting this issue, and how do I go about fixing it (shy > of completely replacing the plug wires, which I'd prefer not to > do... But will do if need be...)? > > Any thoughts you might have on the matter would be appreciated. > > Thanks, > > Scott Poehlmann > Yak 55M N155YK > > ________________________________ Message 4 _____________________________________ Time: 04:11:23 AM PST US From: "Hans Oortman" Subject: RE: Yak-List: RF interference Scott, This is one of the most difficult things to find/resolve. A couple of possibilities: How did you determine it is RF interference, i.e. is it picked up by the antenna or via the power line?? Is the interference opening the squelch? This can easily be checked by disconnecting the antenna and connecting a small 50 Ohm dummyload. If it is picked up by the antenna it will be a real problem to resolve (assuming all the shielding of the plugs wiring etc is OK), not to say almost impossible without redesigning the radio w.r.t. grounding, internal decoupling etc. If it is picked up on the power leads it is easier to prevent by using a filter in the powerline. Ask Dennis for contact details of a company, I think in Texas, who makes those filters suitable for use in aeroplanes. The interesting thing y're saying however is "it got worse over time" if that is the case I would check the shielding of the RPM-generator first. If, over time, the shielding has been damaged you can be sure it will generate a lot of noise on the radio which increases or decreases with the rpm. Hope this will help you a little. Hans Oortman RA3326K Netherlands -----Oorspronkelijk bericht----- Van: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] Namens Scott Poehlmann Verzonden: donderdag 16 december 2010 12:07 Aan: yak-list@matronics.com Onderwerp: Yak-List: RF interference Hi All, I am aware this has been discussed before, but as the problem now effects my own airplane, I have am a bit more attentive... I have a Yak 55M with an auto-plug conversion. The conversion has been in place for about 3 years now (roughly 400 hours). I am now getting RF interference picked up in the Briz radio from the mags/plug wires. At least I assume that is the source, as it is RPM dependent. It has been present since installation, but has been gradually getting worse over the past year or so. I assume that there is a shielding issue either at the mag connection or along the wires somewhere. My question to you is where should I start to look at trouble shooting this issue, and how do I go about fixing it (shy of completely replacing the plug wires, which I'd prefer not to do... But will do if need be...)? Any thoughts you might have on the matter would be appreciated. Thanks, Scott Poehlmann Yak 55M N155YK ________________________________ Message 5 _____________________________________ Time: 05:34:47 AM PST US From: A Dennis Savarese Subject: Re: Yak-List: RF interference We have installed these magneto filters on the P-leads http://www.aircraftspruce.com/catalog/elpages/lsMagFilter.php, mounting them on one of the studs of the round accessory case cover. They have worked quite well and are easily installed by removing the P lead and de-soldering the shield and wire from the P-lead "button", installing a terminal lung on the P lead wire and connecting it to the mag filter. Then install a terminal lug on the mag filter wire and soldering it to the P-lead button. For additional noise attenuation, we have also installed this noise filter directly on the DC line to the affected unit. http://www.aircraftspruce.com/catalog/elpages/lsStrobeNoiseEl.php. There are larger noise filters with higher current ratings that could be used on the DC bus. http://www.aircraftspruce.com/catalog/elpages/lonestarFilter70amp.php. Dennis On 12/16/2010 6:09 AM, Hans Oortman wrote: > --> Yak-List message posted by: "Hans Oortman" > > Scott, > > This is one of the most difficult things to find/resolve. > A couple of possibilities: > How did you determine it is RF interference, i.e. is it picked up by the > antenna or via the power line?? Is the interference opening the squelch? > This can easily be checked by disconnecting the antenna and connecting a > small 50 Ohm dummyload. > If it is picked up by the antenna it will be a real problem to resolve > (assuming all the shielding of the plugs wiring etc is OK), not to say > almost impossible without redesigning the radio w.r.t. grounding, internal > decoupling etc. > > If it is picked up on the power leads it is easier to prevent by using a > filter in the powerline. Ask Dennis for contact details of a company, I > think in Texas, who makes those filters suitable for use in aeroplanes. > > The interesting thing y're saying however is "it got worse over time" if > that is the case I would check the shielding of the RPM-generator first. If, > over time, the shielding has been damaged you can be sure it will generate a > lot of noise on the radio which increases or decreases with the rpm. > > Hope this will help you a little. > > Hans Oortman > RA3326K > Netherlands > > -----Oorspronkelijk bericht----- > Van: owner-yak-list-server@matronics.com > [mailto:owner-yak-list-server@matronics.com] Namens Scott Poehlmann > Verzonden: donderdag 16 december 2010 12:07 > Aan: yak-list@matronics.com > Onderwerp: Yak-List: RF interference > > --> Yak-List message posted by: Scott Poehlmann > > Hi All, > > I am aware this has been discussed before, but as the problem now > effects my own airplane, I have am a bit more attentive... > > I have a Yak 55M with an auto-plug conversion. The conversion has been > in place for about 3 years now (roughly 400 hours). I am now getting RF > interference picked up in the Briz radio from the mags/plug wires. At > least I assume that is the source, as it is RPM dependent. It has been > present since installation, but has been gradually getting worse over > the past year or so. I assume that there is a shielding issue either at > the mag connection or along the wires somewhere. My question to you is > where should I start to look at trouble shooting this issue, and how do > I go about fixing it (shy of completely replacing the plug wires, which > I'd prefer not to do... But will do if need be...)? > > Any thoughts you might have on the matter would be appreciated. > > Thanks, > > Scott Poehlmann > Yak 55M N155YK > > ________________________________ Message 6 _____________________________________ Time: 05:45:45 AM PST US From: A Dennis Savarese Subject: Re: Yak-List: Yak 18T Parts Ant, You can make your life a lot simpler regarding the external air fill port by installing a Schrader valve fitting (http://www.mcmaster.com/#schrader-valves/6ydc), part number 8063K31, on the cover. Remove the valve core because it is not needed. It's a 1/8 NPT Schrader valve fitting. Drill and tap the center of the cover plate. Put a small amount of epoxy around the threads when installing the Schrader valve to prevent leaks. Then you can use a simple Schrader valve coupler attached to the hose going to an air tank, http://www.aircraft-tool.com/shop/detail.aspx?PRODUCT_ID=SK2043C, and you'll never have to find a Russian adapter again. By installing the Schrader valve fitting on the cover, you can still remove the cover and use a Russian fitting. Hope this helps. Dennis On 12/16/2010 4:36 AM, Anthony Hudacek wrote: > Hi all, > Does anyone have an air connection cover for my 18T. Also are the > other Yak's the same? > Thank you, > Ant. > > ________________________________ Message 7 _____________________________________ Time: 06:51:37 AM PST US From: "George Coy" Subject: Yak-List: Chinese L-7 The new Chinese L-7 prototype is getting ready to fly. It is a Chinese version of the Yak-152. It has a Romanian M`14P and an MT propeller. ________________________________ Message 8 _____________________________________ Time: 07:09:58 AM PST US From: Didier Blouzard Subject: Re: Yak-List: Chinese L-7 WHAT A PLANE WHAT A PLANE What about its performances? And not to come back on thi but what about the price (eh eh) :400000USD? best of all regards Didier 2010/12/16 George Coy > The new Chinese L-7 prototype is getting ready to fly. It is a Chinese > version of the Yak-152. It has a Romanian M`14P and an MT propeller. > -- Didier BLOUZARD didier.blouzard@gmail.com 0624243672 ________________________________ Message 9 _____________________________________ Time: 07:11:23 AM PST US From: Eric Wobschall Subject: Re: Yak-List: Chinese L-7 That does look cool. 152? Typo, right? On Dec 16, 2010, at 9:41 AM, George Coy wrote: > The new Chinese L-7 prototype is getting ready to fly. It is a > Chinese version of the Yak-152. It has a Romanian M`14P and an MT > propeller. > ________________________________ Message 10 ____________________________________ Time: 07:28:27 AM PST US From: "George Coy" Subject: RE: Yak-List: Chinese L-7 No the -152 is a later version of the -52 From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall Sent: Thursday, December 16, 2010 10:09 AM Subject: Re: Yak-List: Chinese L-7 That does look cool. 152? Typo, right? On Dec 16, 2010, at 9:41 AM, George Coy wrote: The new Chinese L-7 prototype is getting ready to fly. It is a Chinese version of the Yak-152. It has a Romanian M`14P and an MT propeller. ________________________________ Message 11 ____________________________________ Time: 08:14:17 AM PST US From: Thomas Smith Subject: Yak-List: Marvel Mystery Oil Does anyone have a recommendation concerning use of Marvel Mystery Oil in the fuel, not the oil, of a Yak 52? It is reported to work well in Lycoming engines to help prevent valve sticking. thomas_csmith@yahoo.com ________________________________ Message 12 ____________________________________ Time: 08:24:28 AM PST US From: A Dennis Savarese Subject: Re: Yak-List: Marvel Mystery Oil I mixed 6 oz for every 15 gallons and used it for years and years. If I'm not mistaken, it's the stated mixture amount on the label. Interpolate when topping off the tanks. And it does work well and does seem to prevent sticking valves. Dennis On 12/16/2010 10:11 AM, Thomas Smith wrote: > --> Yak-List message posted by: Thomas Smith > > Does anyone have a recommendation concerning use of Marvel Mystery Oil in the fuel, not the oil, of a Yak 52? It is reported to work well in Lycoming engines to help prevent valve sticking. > > thomas_csmith@yahoo.com > > ________________________________ Message 13 ____________________________________ Time: 08:25:20 AM PST US From: "Tom Elliott" Subject: RE: Yak-List: Chinese L-7 Looks like it is equipped with ejection seats? Tom Elliott CJ-6A NX63727 702-595-2680 _____ From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of George Coy Sent: Thursday, December 16, 2010 6:41 AM Subject: Yak-List: Chinese L-7 The new Chinese L-7 prototype is getting ready to fly. It is a Chinese version of the Yak-152. It has a Romanian M`14P and an MT propeller. ________________________________ Message 14 ____________________________________ Time: 08:35:27 AM PST US From: Thomas Smith Subject: Yak-List: Weight & Balance Our Yak 52 has a weight and balance that says one would be out of the aerobatic envelope if one person is flying from the front seat with full fuel. Can this be right? Other concerns about our current weight & balance: 1) There are 49 pounds difference between the Left Main and Right Main weights. Is this normal? Seems like a lot to me. 2) Are the forward and aft limits quoted, 15% MAC and 25% MAC, correct? 3) The conversions from MAC to inches is stated as -6.77 to -12.91 inches (aft of the datum which is frame No. 5, the main spar attachment) for normal category and -6.77 to -9.36 inches for aerobatic category. Are these conversions done correctly? 4) Why was it weighed with 29 lbs weight on radio rack behind rear seat? Is this the correct way to weight a Yak 52? Also, does anyone have any advice on how to do a new weight and balance? thomas_csmith@yahoo.com ________________________________ Message 15 ____________________________________ Time: 08:43:04 AM PST US From: "Roger Kemp M.D." Subject: RE: Yak-List: Chinese L-7 The JAK-152 is equipped with zero zero seats. Suspect the knock off L-7 will be too. Doc From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Tom Elliott Sent: Thursday, December 16, 2010 10:21 AM Subject: RE: Yak-List: Chinese L-7 Looks like it is equipped with ejection seats? Tom Elliott CJ-6A NX63727 702-595-2680 _____ From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of George Coy Sent: Thursday, December 16, 2010 6:41 AM Subject: Yak-List: Chinese L-7 The new Chinese L-7 prototype is getting ready to fly. It is a Chinese version of the Yak-152. It has a Romanian M`14P and an MT propeller. ________________________________ Message 16 ____________________________________ Time: 08:52:46 AM PST US From: RICHARD VOLKER Subject: Re: Yak-List: Chinese L-7 very attractive, like a cross between an SU29 and a Yak 52. I can't wait to see more pics. Do you have any? Rick Volker On Dec 16, 2010, at 9:41 AM, George Coy wrote: > The new Chinese L-7 prototype is getting ready to fly. It is a Chinese version of the Yak-152. It has a Romanian M`14P and an MT propeller. > ________________________________ Message 17 ____________________________________ Time: 08:58:38 AM PST US From: "Richard Goode" Subject: Re: Yak-List: Chinese L-7 It is not a knock-off.Yakovlev have been very much involved with design!! Richard Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW United Kingdom Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com ----- Original Message ----- From: Roger Kemp M.D. To: yak-list@matronics.com Sent: Thursday, December 16, 2010 4:39 PM Subject: RE: Yak-List: Chinese L-7 The JAK-152 is equipped with zero zero seats. Suspect the knock off L-7 will be too. Doc From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Tom Elliott Sent: Thursday, December 16, 2010 10:21 AM To: yak-list@matronics.com Subject: RE: Yak-List: Chinese L-7 Looks like it is equipped with ejection seats? Tom Elliott CJ-6A NX63727 702-595-2680 ------------------------------------------------------------------------- --- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of George Coy Sent: Thursday, December 16, 2010 6:41 AM To: yak-list@matronics.com Subject: Yak-List: Chinese L-7 The new Chinese L-7 prototype is getting ready to fly. It is a Chinese version of the Yak-152. It has a Romanian M`14P and an MT propeller. www.aeroelectric.comwww.buildersbooks.comwww.homebuilthelp.comhttp://www. matronics.com/contributionhttp://www.matronics.com/Navigator?Yak-Listhttp ://forums.matronics.com -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ________________________________ Message 18 ____________________________________ Time: 09:25:47 AM PST US From: "Roger Kemp M.D." Subject: RE: Yak-List: Chinese L-7 >From looking at the wings, it has a CJ-6 nose gear. Doc From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of RICHARD VOLKER Sent: Thursday, December 16, 2010 10:50 AM Subject: Re: Yak-List: Chinese L-7 very attractive, like a cross between an SU29 and a Yak 52. I can't wait to see more pics. Do you have any? Rick Volker On Dec 16, 2010, at 9:41 AM, George Coy wrote: The new Chinese L-7 prototype is getting ready to fly. It is a Chinese version of the Yak-152. It has a Romanian M`14P and an MT propeller. ________________________________ Message 19 ____________________________________ Time: 09:44:55 AM PST US From: "George Coy" Subject: RE: Yak-List: Chinese L-7 As Richard pointed out, The design was done by Yakovlev design bureau and yes it has ejection seats. From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp M.D. Sent: Thursday, December 16, 2010 11:40 AM Subject: RE: Yak-List: Chinese L-7 The JAK-152 is equipped with zero zero seats. Suspect the knock off L-7 will be too. Doc From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Tom Elliott Sent: Thursday, December 16, 2010 10:21 AM Subject: RE: Yak-List: Chinese L-7 Looks like it is equipped with ejection seats? Tom Elliott CJ-6A NX63727 702-595-2680 _____ From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of George Coy Sent: Thursday, December 16, 2010 6:41 AM Subject: Yak-List: Chinese L-7 The new Chinese L-7 prototype is getting ready to fly. It is a Chinese version of the Yak-152. It has a Romanian M`14P and an MT propeller. www.aeroelectric.com www.buildersbooks.com www.homebuilthelp.com http://www.matronics.com/contribution http://www.matronics.com/Navigator?Yak-List http://forums.matronics.com ________________________________ Message 20 ____________________________________ Time: 10:39:31 AM PST US From: "Roger Kemp M.D." Subject: RE: Yak-List: RF interference Check the shielding on your Tac Generator. That is the most likely source for RPM related noise. Doc -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Scott Poehlmann Sent: Thursday, December 16, 2010 5:07 AM Subject: Yak-List: RF interference Hi All, I am aware this has been discussed before, but as the problem now effects my own airplane, I have am a bit more attentive... I have a Yak 55M with an auto-plug conversion. The conversion has been in place for about 3 years now (roughly 400 hours). I am now getting RF interference picked up in the Briz radio from the mags/plug wires. At least I assume that is the source, as it is RPM dependent. It has been present since installation, but has been gradually getting worse over the past year or so. I assume that there is a shielding issue either at the mag connection or along the wires somewhere. My question to you is where should I start to look at trouble shooting this issue, and how do I go about fixing it (shy of completely replacing the plug wires, which I'd prefer not to do... But will do if need be...)? Any thoughts you might have on the matter would be appreciated. Thanks, Scott Poehlmann Yak 55M N155YK ________________________________ Message 21 ____________________________________ Time: 01:58:14 PM PST US Subject: Yak-List: Re: Chinese L-7 From: "keithmckinley" Dear Santa................. -------- Keith McKinley 700HS KFIT Read this topic online here: http://forums.matronics.com/viewtopic.php?p=323606#323606 ________________________________ Message 22 ____________________________________ Time: 03:05:42 PM PST US Subject: Yak-List: Re: Chinese L-7 From: "LawnDart" Another Chinese original [Wink] Read this topic online here: http://forums.matronics.com/viewtopic.php?p=323613#323613 ________________________________ Message 23 ____________________________________ Time: 03:24:12 PM PST US From: Eric Wobschall Subject: Re: Yak-List: Chinese L-7 How about those Liberace inspired exhaust stacks? On Dec 16, 2010, at 9:41 AM, George Coy wrote: > The new Chinese L-7 prototype is getting ready to fly. It is a > Chinese version of the Yak-152. It has a Romanian M`14P and an MT > propeller. > ________________________________ Message 24 ____________________________________ Time: 04:07:17 PM PST US From: Anthony Hudacek Subject: Yak-List: Yak 18T parts Thanks Dennis, - But it is the actual cover plate that I am after. - Ant.=0A=0A=0A ________________________________ Message 25 ____________________________________ Time: 06:59:24 PM PST US From: Matt Dralle Subject: RE: Yak-List: Chinese L-7 How much is one of these beautys? That is super sweet. Matt At 09:13 AM 12/16/2010 Thursday, you wrote: >As Richard pointed out, The design was done by Yakovlev design bureau and yes it has ejection seats. > >From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp M.D. >Sent: Thursday, December 16, 2010 11:40 AM >To: yak-list@matronics.com >Subject: RE: Yak-List: Chinese L-7 > >The JAK-152 is equipped with zero zero seats. Suspect the knock off L-7 will be too. >Doc > >From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Tom Elliott >Sent: Thursday, December 16, 2010 10:21 AM >To: yak-list@matronics.com >Subject: RE: Yak-List: Chinese L-7 > >Looks like it is equipped with ejection seats? > >Tom Elliott >CJ-6A NX63727 >702-595-2680 - Matt Dralle RV-8 #82880 N998RV http://www.mattsrv8.com - Matt's RV-8 Construction Log http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel Status: 111+ Hours TTSN - The Fun Never Stops... ________________________________ Message 26 ____________________________________ Time: 07:51:58 PM PST US Subject: Re: Yak-List: Chinese L-7 From: cjpilot710@aol.com Boy she has a little bit of everything in her. Looks like she may have plain flaps. She may not have ejection seat but what can be called extraction seats. When activated, a small charge extends a telescoping pole out high enough to clear the tail. The chute is than deployed and than fully opens. At which point it pulls the pilot out of the seat, up the pole, and freed of f the end of it. I think I read that system was certified for inverted fl ight down to 200'. The nose gear fork does not look like a casting but formed plate. The wings have a lot of dihedral (compared to a 52) maybe 3 to 5 degrees and is something other than a Clark Y. Looking at the tip airfoil, it lo oks like a 4422 and I think the root area looks like a 2300 series. I can be wrong. The landing gear looks like she'll be fully retracted, but looks puny to me. It does have a lot of shock tube showing though. Can't tell but the flight controls may be all medal - at least the rudder appears so. You sure tell by the vertical stab its got a lot Russian in it. Boy I love to see this up close. I don't care for the side opening canopy ( I like to fly with mine open a lot). Bet she'll make a great trainer. Jim "Pappy" Goolsby -----Original Message----- From: George Coy Sent: Thu, Dec 16, 2010 9:41 am Subject: Yak-List: Chinese L-7 The new Chinese L-7 prototype is getting ready to fly. It is a Chinese ver sion of the Yak-152. It has a Romanian M`14P and an MT propeller. ________________________________ Message 27 ____________________________________ Time: 08:36:44 PM PST US From: Eric Wobschall Subject: Re: Yak-List: Chinese L-7 http://www.yak.ru/ENG/PROD/new_152.php On Dec 16, 2010, at 10:49 PM, cjpilot710@aol.com wrote: > > Boy she has a little bit of everything in her. > > Looks like she may have plain flaps. > > She may not have ejection seat but what can be called extraction > seats. When activated, a small charge extends a telescoping pole > out high enough to clear the tail. The chute is than deployed and > than fully opens. At which point it pulls the pilot out of the > seat, up the pole, and freed off the end of it. I think I read that > system was certified for inverted flight down to 200'. > > The nose gear fork does not look like a casting but formed plate. > > The wings have a lot of dihedral (compared to a 52) maybe 3 to 5 > degrees and is something other than a Clark Y. Looking at the tip > airfoil, it looks like a 4422 and I think the root area looks like a > 2300 series. I can be wrong. > The landing gear looks like she'll be fully retracted, but looks > puny to me. It does have a lot of shock tube showing though. > > Can't tell but the flight controls may be all medal - at least the > rudder appears so. You sure tell by the vertical stab its got a lot > Russian in it. > > Boy I love to see this up close. I don't care for the side opening > canopy ( I like to fly with mine open a lot). Bet she'll make a > great trainer. > > Jim "Pappy" Goolsby > > > -----Original Message----- > From: George Coy > To: yak-list@matronics.com > Sent: Thu, Dec 16, 2010 9:41 am > Subject: Yak-List: Chinese L-7 > > The new Chinese L-7 prototype is getting ready to fly. It is a > Chinese version of the Yak-152. It has a Romanian M`14P and an MT > propeller. > > ------------------------------------------------------------------------------------- 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.