---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Thu 08/18/16: 17 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:49 AM - Yak-52 Max Altitude (Mike Beresford) 2. 02:08 AM - Re: Yak-52 Max Altitude (Richard Goode) 3. 02:28 AM - Re: Yak-52 Max Altitude (Jan Mevis) 4. 02:54 AM - Re: Yak-52 Max Altitude (Etienne Verhellen) 5. 03:10 AM - Re: Re: Yak-52 Max Altitude (Jan Mevis) 6. 04:00 AM - Re: Re: Yak-52 Max Altitude (Al Pickering) 7. 04:23 AM - Re: Re: Hard Starting CJ (A. Dennis Savarese) 8. 08:14 AM - Re: Re: Hard Starting CJ (doug sapp) 9. 08:25 AM - Re: Re: Hard Starting CJ (A. Dennis Savarese) 10. 11:31 AM - Housai Replacement Propellor (glipaz) 11. 11:37 AM - Re: Re: Yak-52 Max Altitude (Jan Mevis) 12. 02:18 PM - Re: Yak-52 Max Altitude (Dave Jester) 13. 03:01 PM - Re: Yak-52 Max Altitude (Jon Blake) 14. 07:10 PM - WTB: CJ-6 (Steve Stires) 15. 10:26 PM - Re: Yak-52 Max Altitude (Jan Mevis) 16. 10:45 PM - Re: Yak-52 Max Altitude (Richard Goode) 17. 11:15 PM - Re: Yak-52 Max Altitude (Jan Mevis) ________________________________ Message 1 _____________________________________ Time: 12:49:27 AM PST US From: Mike Beresford Subject: Yak-List: Yak-52 Max Altitude Hi all I've seen a maximum operating altitude for the Yak-52 quoted as 4,000 m (13,000 ft). Obviously this requires pilot oxygen, but is the altitude limitation due to operational procedures, or a technical limitation on the aircraft? Someone suggested to me that the fuel mixture compensation may run out of travel above the altitude limit. Anyone have some insight into the behaviour of the engine above 13,000 ft? Blue skiesMike ________________________________ Message 2 _____________________________________ Time: 02:08:12 AM PST US From: "Richard Goode" Subject: RE: Yak-List: Yak-52 Max Altitude One doesn't need oxygen for a short trip beyond 13,000 feet =93 pilots in the First World War were patrolling at 20,000 feet! To revert to Yaks, a standard 52 is running out of breath at 13,000 feet, but the real reason is that the Russians don't extend the manuals for an aircraft without oxygen beyond 4000 m. However, nothing to do with the engine capability =93 with a light 18 T; 400 hp; MT prop I was once still climbing (albeit very slowly) at 18,000 feet. Richard Goode Rhodds Farm Lyonshall Hereford HR5 3LW United Kingdom Tel: +94 (0) 81 241 5137 (Sri Lanka) Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com I=99m currently in Sri Lanka but this Mail is working,and my local phone is +94 779 132 160. From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Mike Beresford Sent: Thursday, August 18, 2016 1:19 PM Subject: Yak-List: Yak-52 Max Altitude Hi all I've seen a maximum operating altitude for the Yak-52 quoted as 4,000 m (13,000 ft). Obviously this requires pilot oxygen, but is the altitude limitation due to operational procedures, or a technical limitation on the aircraft? Someone suggested to me that the fuel mixture compensation may run out of travel above the altitude limit. Anyone have some insight into the behaviour of the engine above 13,000 ft? Blue skies Mike -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ________________________________ Message 3 _____________________________________ Time: 02:28:14 AM PST US Subject: Re: Yak-List: Yak-52 Max Altitude From: Jan Mevis I always asked myself if they were really up that high in WW I. Difficult to verify of course. But with those engines? As you state it Richard, with an M14PF, and an MT prop, you climb very slowly at 18000 feet. So how did they do it, the aces in WW I? Just wondering, Jan From: on behalf of Richard Goode Subject: RE: Yak-List: Yak-52 Max Altitude One doesn't need oxygen for a short trip beyond 13,000 feet =AD pilots in the First World War were patrolling at 20,000 feet! To revert to Yaks, a standard 52 is running out of breath at 13,000 feet, but the real reason is that the Russians don't extend the manuals for an aircraft without oxygen beyond 4000 m. However, nothing to do with the engine capability =AD with a light 18 T; 400 hp; MT prop I was once still climbing (albeit very slowly) at 18,000 feet. Richard Goode Rhodds Farm Lyonshall Hereford HR5 3LW United Kingdom Tel: +94 (0) 81 241 5137 (Sri Lanka) Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com I=B9m currently in Sri Lanka but this Mail is working,and my local phone is +94 779 132 160. From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Mike Beresford Sent: Thursday, August 18, 2016 1:19 PM Subject: Yak-List: Yak-52 Max Altitude Hi all I've seen a maximum operating altitude for the Yak-52 quoted as 4,000 m (13,000 ft). Obviously this requires pilot oxygen, but is the altitude limitation due to operational procedures, or a technical limitation on the aircraft? Someone suggested to me that the fuel mixture compensation may run out of travel above the altitude limit. Anyone have some insight into the behaviou r of the engine above 13,000 ft? Blue skies Mike -- This message has been scanned for viruses and dangerous content by MailScanner , and is believed to be clean. ________________________________ Message 4 _____________________________________ Time: 02:54:59 AM PST US Subject: Yak-List: Re: Yak-52 Max Altitude From: "Etienne Verhellen" Went to FL 130* over the Alps with 'janie' and my wife once ... For about one hour ... no problem ... just a little bit of ice on the wings climbing through a small cloud layer ... Had to go to FL 150* on my way to Portugal from Belgium ... engine kept running nicely and 'janie' was still climbing ... https://flic.kr/y/2sP63zU https://flic.kr/s/aHskAYjMcs * 13,000 feet and 15,000 feet respectively, Transition Altitudes (!) lower in Europe than the usual 18,000 feet in the US of A. Last Sunday in sunny Belgium ... https://flic.kr/p/L8T5WJ https://flic.kr/p/L8T6y5 https://flic.kr/p/L51EXz https://flic.kr/p/L8T5Ly https://flic.kr/p/L8T64Y https://flic.kr/p/L8T6gw https://flic.kr/p/LbKoEX https://flic.kr/p/L8T6qQ https://flic.kr/p/KKaj1E http://youtu.be/S2j84Gj5nt8 Cheers, Etienne. http://www.airrace.pro/images/airrace/pilot-bios/bio-etienne-verhellen.jpg -------- Yak-52 training anywhere - FI(A) Aerobatic Instructor - Specialised Yak-52. http://www.afors.com/index.php?page=adview&adid=25551&imid=4 To Fly To Serve ... https://c2.staticflickr.com/4/3677/18982461460_03d628ac44_b.jpg Read this topic online here: http://forums.matronics.com/viewtopic.php?p=459592#459592 ________________________________ Message 5 _____________________________________ Time: 03:10:25 AM PST US Subject: Re: Yak-List: Re: Yak-52 Max Altitude From: Jan Mevis Yes, FL130 with the 52 is no problem. But how on earth did they manage to fly even higher with those planes of WW I ? On 18/08/16 11:54, "Etienne Verhellen" wrote: > >Went to FL 130* over the Alps with 'janie' and my wife once ... >For about one hour ... no problem ... just a little bit of ice on the >wings climbing through a small cloud layer ... > >Had to go to FL 150* on my way to Portugal from Belgium ... engine kept >running nicely and 'janie' was still climbing ... > >https://flic.kr/y/2sP63zU >https://flic.kr/s/aHskAYjMcs > >* 13,000 feet and 15,000 feet respectively, Transition Altitudes (!) > lower in Europe than the usual 18,000 feet in the US of A. > >Last Sunday in sunny Belgium ... > >https://flic.kr/p/L8T5WJ >https://flic.kr/p/L8T6y5 >https://flic.kr/p/L51EXz >https://flic.kr/p/L8T5Ly >https://flic.kr/p/L8T64Y >https://flic.kr/p/L8T6gw >https://flic.kr/p/LbKoEX >https://flic.kr/p/L8T6qQ > >https://flic.kr/p/KKaj1E > >http://youtu.be/S2j84Gj5nt8 > >Cheers, > >Etienne. > >http://www.airrace.pro/images/airrace/pilot-bios/bio-etienne-verhellen.jpg > >-------- >Yak-52 training anywhere - FI(A) Aerobatic Instructor - Specialised >Yak-52. >http://www.afors.com/index.php?page=adview&adid=25551&imid=4 >To Fly To Serve ... >https://c2.staticflickr.com/4/3677/18982461460_03d628ac44_b.jpg > > >Read this topic online here: > >http://forums.matronics.com/viewtopic.php?p=459592#459592 > > ________________________________ Message 6 _____________________________________ Time: 04:00:49 AM PST US From: Al Pickering Subject: Re: Yak-List: Re: Yak-52 Max Altitude Very low stall speed Sent from Alspadair > On 18 Aug 2016, at 20:14, Jan Mevis wrote: > > > Yes, FL130 with the 52 is no problem. But how on earth did they manage to > fly even higher with those planes of WW I ? > > On 18/08/16 11:54, "Etienne Verhellen" > wrote: > >> >> Went to FL 130* over the Alps with 'janie' and my wife once ... >> For about one hour ... no problem ... just a little bit of ice on the >> wings climbing through a small cloud layer ... >> >> Had to go to FL 150* on my way to Portugal from Belgium ... engine kept >> running nicely and 'janie' was still climbing ... >> >> https://flic.kr/y/2sP63zU >> https://flic.kr/s/aHskAYjMcs >> >> * 13,000 feet and 15,000 feet respectively, Transition Altitudes (!) >> lower in Europe than the usual 18,000 feet in the US of A. >> >> Last Sunday in sunny Belgium ... >> >> https://flic.kr/p/L8T5WJ >> https://flic.kr/p/L8T6y5 >> https://flic.kr/p/L51EXz >> https://flic.kr/p/L8T5Ly >> https://flic.kr/p/L8T64Y >> https://flic.kr/p/L8T6gw >> https://flic.kr/p/LbKoEX >> https://flic.kr/p/L8T6qQ >> >> https://flic.kr/p/KKaj1E >> >> http://youtu.be/S2j84Gj5nt8 >> >> Cheers, >> >> Etienne. >> >> http://www.airrace.pro/images/airrace/pilot-bios/bio-etienne-verhellen.jpg >> >> -------- >> Yak-52 training anywhere - FI(A) Aerobatic Instructor - Specialised >> Yak-52. >> http://www.afors.com/index.php?page=adview&adid=25551&imid=4 >> To Fly To Serve ... >> https://c2.staticflickr.com/4/3677/18982461460_03d628ac44_b.jpg >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=459592#459592 > > > > > > > ________________________________ Message 7 _____________________________________ Time: 04:23:14 AM PST US From: "A. Dennis Savarese" Subject: Re: Yak-List: Re: Hard Starting CJ Doug,Do you remember which finger was the longer 3.87mm?=C2- If you can r eference it by pointing the two rotors up (north), then left or right, that would be a great help.Thanks so much.Dennis From: doug sapp To: yak-list@matronics.com Sent: Wednesday, August 17, 2016 8:34 PM Subject: Re: Yak-List: Re: Hard Starting CJ Rotor fingers:One extends 3.87mm out of the porcelain.The other 2.97mm.=C2 - This is a new unused rotor. Doug On Wed, Aug 17, 2016 at 4:41 AM, A. Dennis Savarese wrote: th.net> Yes, the finger on the rotor.=C2- I really don't know what the "normal" l ength is. Maybe Doug Sapp could measure the length of the fingers on a new rotor and post it to the List for us. Dennis A. Dennis Savarese 334-546-8182=C2-(mobile) www.yak-52.com Skype - Yakguy1 On 8/17/2016 5:45 AM, JL2A wrote: Thanks Dennis I'll check it out. When you say 'starting coil finger length' you mean the finger on the rotor? What is normal & undesirable length? Hi Doug, yes it's ops normal once started. I suspect fuel primer atomizer a s I've had this before but will check magneto finger position while I'm at it. Read this topic online here: http://forums.matronics.com/vi ewtopic.php?p=459573#459573 ==== ==================== ========== = List" rel="noreferrer" target="_blank">http://www.matronics.com/Navig a tor?Yak-List ==== ==================== ========== = FORUMS - eferrer" target="_blank">http://forums.matronics.com ==== ==================== ========== = WIKI - errer" target="_blank">http://wiki.matronics.com ==== ==================== ========== = b Site - =C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin. rel="noreferrer" target="_blank">http://www.matronics.com/contr ibution ==== ==================== ========== = ________________________________ Message 8 _____________________________________ Time: 08:14:08 AM PST US From: doug sapp Subject: Re: Yak-List: Re: Hard Starting CJ Dennis and all, The CJ rotor has one finger which is embedded in white porcelain, the other is embedded in the red Bakelite. If finger up, the finger on the left is the longest @3.87 protruding out of the porcelain. On Thu, Aug 18, 2016 at 4:22 AM, A. Dennis Savarese < dsavarese0812@bellsouth.net> wrote: > Doug, > Do you remember which finger was the longer 3.87mm? If you can reference > it by pointing the two rotors up (north), then left or right, that would be > a great help. > Thanks so much. > Dennis > > > ------------------------------ > *From:* doug sapp > *To:* yak-list@matronics.com > *Sent:* Wednesday, August 17, 2016 8:34 PM > *Subject:* Re: Yak-List: Re: Hard Starting CJ > > Rotor fingers: > One extends 3.87mm out of the porcelain. > The other 2.97mm. > > This is a new unused rotor. > > Doug > > On Wed, Aug 17, 2016 at 4:41 AM, A. Dennis Savarese < > dsavarese0812@bellsouth.net> wrote: > > dsavarese0812@bellsouth.net> > > Yes, the finger on the rotor. I really don't know what the "normal" > length is. Maybe Doug Sapp could measure the length of the fingers on a new > rotor and post it to the List for us. > Dennis > > A. Dennis Savarese > 334-546-8182 (mobile) > www.yak-52.com > Skype - Yakguy1 > > On 8/17/2016 5:45 AM, JL2A wrote: > > > Thanks Dennis I'll check it out. When you say 'starting coil finger > length' you mean the finger on the rotor? What is normal & undesirable > length? > > Hi Doug, yes it's ops normal once started. I suspect fuel primer atomizer > as I've had this before but will check magneto finger position while I'm at > it. > > > Read this topic online here: > > http://forums.matronics.com/vi ewtopic.php?p=459573#459573 > > > > ==== ============================== = > List" rel="noreferrer" target="_blank">http://www.matronics.com/Navig > ator?Yak-List > ==== ============================== = > FORUMS - > eferrer" target="_blank">http://forums.matronics.com > ==== ============================== = > WIKI - > errer" target="_blank">http://wiki.matronics.com > ==== ============================== = > b Site - > -Matt Dralle, List Admin. > rel="noreferrer" target="_blank">http://www.matronics.com/contr ibution > ==== ============================== = > > ________________________________ Message 9 _____________________________________ Time: 08:25:47 AM PST US From: "A. Dennis Savarese" Subject: Re: Yak-List: Re: Hard Starting CJ Thanks Doug.Dennis From: doug sapp To: yak-list@matronics.com Sent: Thursday, August 18, 2016 11:13 AM Subject: Re: Yak-List: Re: Hard Starting CJ Dennis and all,The CJ rotor has one finger which is embedded in white porce lain, the other is=C2-embedded=C2-in the red=C2-Bakelite.=C2- If fi nger up, the finger on the left is the longest @3.87 protruding out of the porcelain. On Thu, Aug 18, 2016 at 4:22 AM, A. Dennis Savarese wrote: Doug,Do you remember which finger was the longer 3.87mm?=C2- If you can r eference it by pointing the two rotors up (north), then left or right, that would be a great help.Thanks so much.Dennis From: doug sapp To: yak-list@matronics.com Sent: Wednesday, August 17, 2016 8:34 PM Subject: Re: Yak-List: Re: Hard Starting CJ Rotor fingers:One extends 3.87mm out of the porcelain.The other 2.97mm.=C2 - This is a new unused rotor. Doug On Wed, Aug 17, 2016 at 4:41 AM, A. Dennis Savarese wrote: th.net> Yes, the finger on the rotor.=C2- I really don't know what the "normal" l ength is. Maybe Doug Sapp could measure the length of the fingers on a new rotor and post it to the List for us. Dennis A. Dennis Savarese 334-546-8182=C2-(mobile) www.yak-52.com Skype - Yakguy1 On 8/17/2016 5:45 AM, JL2A wrote: Thanks Dennis I'll check it out. When you say 'starting coil finger length' you mean the finger on the rotor? What is normal & undesirable length? Hi Doug, yes it's ops normal once started. I suspect fuel primer atomizer a s I've had this before but will check magneto finger position while I'm at it. Read this topic online here: http://forums.matronics.com/vi ewtopic.php?p=459573#459573 ==== ==================== ========== = List" rel="noreferrer" target="_blank">http://www. matronics.com/Navig ator?Yak-List ==== ==================== ========== = FORUMS - eferrer" target="_blank">http://forums. matronics.com ==== ==================== ========== = WIKI - errer" target="_blank">http://wiki. matronics.com ==== ==================== ========== = b Site - =C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin. rel="noreferrer" target="_blank">http://www. matronics.com/contr ibutio n ==== ==================== ========== = ________________________________ Message 10 ____________________________________ Time: 11:31:39 AM PST US Subject: Yak-List: Housai Replacement Propellor From: "glipaz" Wondering if anyone has found a more efficient propeller for the Housai other than the stock one? Efficient defined as better climb without sacrificing cruise speed. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=459613#459613 ________________________________ Message 11 ____________________________________ Time: 11:37:12 AM PST US Subject: Re: Yak-List: Re: Yak-52 Max Altitude From: Jan Mevis Yes, FL130 with the 52 is no problem. But how on earth did they manage to fly even higher with those planes of WW I ? On 18/08/16 11:54, "Etienne Verhellen" wrote: > >Went to FL 130* over the Alps with 'janie' and my wife once ... >For about one hour ... no problem ... just a little bit of ice on the >wings climbing through a small cloud layer ... > >Had to go to FL 150* on my way to Portugal from Belgium ... engine kept >running nicely and 'janie' was still climbing ... > >https://flic.kr/y/2sP63zU >https://flic.kr/s/aHskAYjMcs > >* 13,000 feet and 15,000 feet respectively, Transition Altitudes (!) > lower in Europe than the usual 18,000 feet in the US of A. > >Last Sunday in sunny Belgium ... > >https://flic.kr/p/L8T5WJ >https://flic.kr/p/L8T6y5 >https://flic.kr/p/L51EXz >https://flic.kr/p/L8T5Ly >https://flic.kr/p/L8T64Y >https://flic.kr/p/L8T6gw >https://flic.kr/p/LbKoEX >https://flic.kr/p/L8T6qQ > >https://flic.kr/p/KKaj1E > >http://youtu.be/S2j84Gj5nt8 > >Cheers, > >Etienne. > >http://www.airrace.pro/images/airrace/pilot-bios/bio-etienne-verhellen.jpg > >-------- >Yak-52 training anywhere - FI(A) Aerobatic Instructor - Specialised >Yak-52. >http://www.afors.com/index.php?page=adview&adid=25551&imid=4 >To Fly To Serve ... >https://c2.staticflickr.com/4/3677/18982461460_03d628ac44_b.jpg > > >Read this topic online here: > >http://forums.matronics.com/viewtopic.php?p=459592#459592 > > ________________________________ Message 12 ____________________________________ Time: 02:18:37 PM PST US From: Dave Jester Subject: Re: Yak-List: Yak-52 Max Altitude I have been to 14,500 feet in my 52TD Termikas conversion. Sluggish on the controls that high. Or maybe I was suffering from hypoxia and I was the one sluggish! It was neat when a regional jet passed me 500 feet below. :) On Aug 18, 2016, at 2:48 AM, Mike Beresford wrote: > Hi all > > I've seen a maximum operating altitude for the Yak-52 quoted as 4,000 m (13,000 ft). Obviously this requires pilot oxygen, but is the altitude limitation due to operational procedures, or a technical limitation on the aircraft? > > Someone suggested to me that the fuel mixture compensation may run out of travel above the altitude limit. Anyone have some insight into the behaviour of the engine above 13,000 ft? > > Blue skies > Mike ________________________________ Message 13 ____________________________________ Time: 03:01:48 PM PST US Subject: Re: Yak-List: Yak-52 Max Altitude From: Jon Blake V2VsbCwgSSd2ZSBoYWQgbXkgc3RvY2ssIDI4NUhQIENKIHRvIDE0LDUwMSBmZWV0IGFuZCBzaGUg d2FzIHdpbGxpbmcgdG8gZ28gZXZlbiBoaWdoZXIsIGJ1dCBJIGRpZG4ndCB3YW50IHRvIGVtYmFy cmFzcyB0aGUgWUFLNTIgSSB3YXMgZmx5aW5nIHdpbmcgb24uLi4gSkIgCgpTZW50IGZyb20gbXkg VmVyaXpvbiBXaXJlbGVzcyA0RyBMVEUgRFJPSUQKCkRhdmUgSmVzdGVyIDx3ZGplc3RlckBjb3gu bmV0PiB3cm90ZToKCj7CoEkgaGF2ZSBiZWVuIHRvIDE0LDUwMCBmZWV0IGluIG15IDUyVEQgVGVy bWlrYXMgY29udmVyc2lvbi4gwqBTbHVnZ2lzaCBvbiB0aGUgY29udHJvbHMgdGhhdCBoaWdoLiDC oE9yIG1heWJlIEkgd2FzIHN1ZmZlcmluZyBmcm9tIGh5cG94aWEgYW5kIEkgd2FzIHRoZSBvbmUg c2x1Z2dpc2ghIMKgSXQgd2FzIG5lYXQgd2hlbiBhIHJlZ2lvbmFsIGpldCBwYXNzZWQgbWUgNTAw IGZlZXQgYmVsb3cuIMKgOikKPgo+Cj4KPk9uIEF1ZyAxOCwgMjAxNiwgYXQgMjo0OCBBTSwgTWlr ZSBCZXJlc2ZvcmQgPG1pa2VfYmVyZXNmb3JkQHlhaG9vLmNvLnVrPiB3cm90ZToKPgo+Cj5IaSBh bGwKPgo+Cj5JJ3ZlIHNlZW4gYSBtYXhpbXVtIG9wZXJhdGluZyBhbHRpdHVkZSBmb3IgdGhlIFlh ay01MiBxdW90ZWQgYXMgNCwwMDAgbSAoMTMsMDAwIGZ0KS4gT2J2aW91c2x5IHRoaXMgcmVxdWly ZXMgcGlsb3Qgb3h5Z2VuLCBidXQgaXMgdGhlIGFsdGl0dWRlIGxpbWl0YXRpb24gZHVlIHRvIG9w ZXJhdGlvbmFsIHByb2NlZHVyZXMsIG9yIGEgdGVjaG5pY2FsIGxpbWl0YXRpb24gb24gdGhlIGFp cmNyYWZ0Pwo+Cj4KPlNvbWVvbmUgc3VnZ2VzdGVkIHRvIG1lIHRoYXQgdGhlIGZ1ZWwgbWl4dHVy ZSBjb21wZW5zYXRpb24gbWF5IHJ1biBvdXQgb2YgdHJhdmVsIGFib3ZlIHRoZSBhbHRpdHVkZSBs aW1pdC4gQW55b25lIGhhdmUgc29tZSBpbnNpZ2h0IGludG8gdGhlIGJlaGF2aW91ciBvZiB0aGUg ZW5naW5lIGFib3ZlIDEzLDAwMCBmdD8KPgo+Cj5CbHVlIHNraWVzCj4KPk1pa2UKPgo+Cg= ________________________________ Message 14 ____________________________________ Time: 07:10:18 PM PST US From: Steve Stires Subject: Yak-List: WTB: CJ-6 Hi, I am wanting to buy a CJ-6. Thanks, Steve ________________________________ Message 15 ____________________________________ Time: 10:26:02 PM PST US Subject: Re: Yak-List: Yak-52 Max Altitude From: Jan Mevis So =8A if it takes a long time to get higher than 14500 feet with a Yak or a CJ, how did the aces in WW I do it with their albatrosses, sopwiths, nieuports and the like, up to 20000 feet or 6 kilometers? From: on behalf of Jon Blake Subject: Re: Yak-List: Yak-52 Max Altitude Well, I've had my stock, 285HP CJ to 14,501 feet and she was willing to go even higher, but I didn't want to embarrass the YAK52 I was flying wing on... JB Sent from my Verizon Wireless 4G LTE DROID Dave Jester wrote: I have been to 14,500 feet in my 52TD Termikas conversion. Sluggish on th e controls that high. Or maybe I was suffering from hypoxia and I was the on e sluggish! It was neat when a regional jet passed me 500 feet below. :) On Aug 18, 2016, at 2:48 AM, Mike Beresford wrote: > Hi all > > I've seen a maximum operating altitude for the Yak-52 quoted as 4,000 m > (13,000 ft). Obviously this requires pilot oxygen, but is the altitude > limitation due to operational procedures, or a technical limitation on th e > aircraft? > > Someone suggested to me that the fuel mixture compensation may run out of > travel above the altitude limit. Anyone have some insight into the behavi our > of the engine above 13,000 ft? > > Blue skies > Mike ________________________________ Message 16 ____________________________________ Time: 10:45:27 PM PST US From: "Richard Goode" Subject: RE: Yak-List: Yak-52 Max Altitude They definitely did! I suspect because the aircraft were so incredibly light. Richard Goode From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Jan Mevis Sent: 19 August 2016 06:25 Subject: Re: Yak-List: Yak-52 Max Altitude So . if it takes a long time to get higher than 14500 feet with a Yak or a CJ, how did the aces in WW I do it with their albatrosses, sopwiths, nieuports and the like, up to 20000 feet or 6 kilometers? From: > on behalf of Jon Blake > > > Subject: Re: Yak-List: Yak-52 Max Altitude Well, I've had my stock, 285HP CJ to 14,501 feet and she was willing to go even higher, but I didn't want to embarrass the YAK52 I was flying wing on... JB Sent from my Verizon Wireless 4G LTE DROID Dave Jester > wrote: I have been to 14,500 feet in my 52TD Termikas conversion. Sluggish on the controls that high. Or maybe I was suffering from hypoxia and I was the one sluggish! It was neat when a regional jet passed me 500 feet below. :) On Aug 18, 2016, at 2:48 AM, Mike Beresford > wrote: Hi all I've seen a maximum operating altitude for the Yak-52 quoted as 4,000 m (13,000 ft). Obviously this requires pilot oxygen, but is the altitude limitation due to operational procedures, or a technical limitation on the aircraft? Someone suggested to me that the fuel mixture compensation may run out of travel above the altitude limit. Anyone have some insight into the behaviour of the engine above 13,000 ft? Blue skies Mike -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ________________________________ Message 17 ____________________________________ Time: 11:15:42 PM PST US Subject: Re: Yak-List: Yak-52 Max Altitude From: Jan Mevis I confirm having read this in several old books (e.g.the book written in Gothic German by Lothar von Richthofen, the brother of the Red Baron who wa s also a pilot). They routinely flew at altitudes of 4000 to 5000 meters, according to these books. I still find this incredible to believe. Let=B9s assume that the pilot indeed read this altitude on his altimeter. Were those early instruments that precise or well calibrated? It=B9s not very important to know of course, only for academic pleasure. Jan, Yak 50 F-AZUK From: on behalf of Richard Goode Subject: RE: Yak-List: Yak-52 Max Altitude They definitely did! I suspect because the aircraft were so incredibly light. Richard Goode From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Jan Mevis Sent: 19 August 2016 06:25 Subject: Re: Yak-List: Yak-52 Max Altitude So =8A if it takes a long time to get higher than 14500 feet with a Yak or a CJ, how did the aces in WW I do it with their albatrosses, sopwiths, nieuports and the like, up to 20000 feet or 6 kilometers? From: on behalf of Jon Blake Subject: Re: Yak-List: Yak-52 Max Altitude Well, I've had my stock, 285HP CJ to 14,501 feet and she was willing to go even higher, but I didn't want to embarrass the YAK52 I was flying wing on... JB Sent from my Verizon Wireless 4G LTE DROID Dave Jester wrote: I have been to 14,500 feet in my 52TD Termikas conversion. Sluggish on th e controls that high. Or maybe I was suffering from hypoxia and I was the on e sluggish! It was neat when a regional jet passed me 500 feet below. :) On Aug 18, 2016, at 2:48 AM, Mike Beresford wrote: > Hi all > > > > I've seen a maximum operating altitude for the Yak-52 quoted as 4,000 m > (13,000 ft). Obviously this requires pilot oxygen, but is the altitude > limitation due to operational procedures, or a technical limitation on th e > aircraft? > > > > Someone suggested to me that the fuel mixture compensation may run out of > travel above the altitude limit. Anyone have some insight into the behavi our > of the engine above 13,000 ft? > > > > Blue skies > > Mike -- This message has been scanned for viruses and dangerous content by MailScanner , and is believed to be clean. ------------------------------------------------------------------------------------- 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.