---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sun 07/11/21: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:57 AM - Re: Compressor charging (stephen.hayne) 2. 09:41 AM - Re: Re: Compressor charging (Richard Goode) 3. 12:53 PM - Re: Compressor charging (easy_driver) 4. 01:26 PM - Foaming Oil (Jon Boede) 5. 04:04 PM - Re: Compressor charging (Ttail) 6. 07:41 PM - Re: Re: Compressor charging (Mark Bitterlich) 7. 08:07 PM - Re: Compressor charging (easy_driver) 8. 11:20 PM - Re: Re: Compressor charging (Stephen van Dijck) ________________________________ Message 1 _____________________________________ Time: 07:57:30 AM PST US Subject: Yak-List: Re: Compressor charging From: "stephen.hayne" richard.goode(at)russiana wrote: > I am obviously not making myself clear! I certainly would not recommend a system of pushrods or cables going through the firewall to turn the water drain tap. What we do is to move the entire water drain tap into the cockpit, typically just below the pilot seat so the tap can easily be opened or closed from the seat. Then the water drain obviously a small metal tube extends through the floor of the aircraft. Like this, the opening and shutting of the tap is totally positive as it would be on the firewall. > -- After chatting with Richard a year or so ago, I did exactly this, using SS paintball (yes, I know, from China) high pressure lines, and a swagelok valve in the cockpit. It is awesome to release the snot from there, and to unload the compressor. However, I have now ONCE forgotten to close the valve upon entering the pattern. So, one has to change their flow/checklist... I also only open the valve if going on a longer flight, not just some local work. -------- - Stephen Hayne, Professor, CIS, Colorado State University 666CJA http://selfsynchronize.com/hayne/plane/cj6.asp Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502790#502790 Attachments: http://forums.matronics.com//files/snot_1_firewall_189.jpg http://forums.matronics.com//files/snot_2_cockpit_valve_122.jpg http://forums.matronics.com//files/snot_3_belly_exit_100.jpg ________________________________ Message 2 _____________________________________ Time: 09:41:07 AM PST US From: "Richard Goode" Subject: RE: Yak-List: Re: Compressor charging Yes, over the years we've installed the systems on many Sukhoi and Yak; it is (almost) full proof, and really does extend the life of the compressor, which, in my view, is the weakest link in the M 14 engine! RICHARD GOODE AEROBATICS Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129 e-mail: richard.goode@russianaeros.com www.russianaeros.com WORLD LEADERS IN RUSSIAN SPORTING AIRCRAFT & ENGINES In partnership with Aerometal Kft, Hungary. -----Original Message----- From: owner-yak-list-server@matronics.com On Behalf Of stephen.hayne Sent: 11 July 2021 15:57 Subject: Yak-List: Re: Compressor charging --> richard.goode(at)russiana wrote: > I am obviously not making myself clear! I certainly would not recommend a system of pushrods or cables going through the firewall to turn the water drain tap. What we do is to move the entire water drain tap into the cockpit, typically just below the pilot seat so the tap can easily be opened or closed from the seat. Then the water drain obviously a small metal tube extends through the floor of the aircraft. Like this, the opening and shutting of the tap is totally positive as it would be on the firewall. > -- After chatting with Richard a year or so ago, I did exactly this, using SS paintball (yes, I know, from China) high pressure lines, and a swagelok valve in the cockpit. It is awesome to release the snot from there, and to unload the compressor. However, I have now ONCE forgotten to close the valve upon entering the pattern. So, one has to change their flow/checklist... I also only open the valve if going on a longer flight, not just some local work. -------- - Stephen Hayne, Professor, CIS, Colorado State University 666CJA http://selfsynchronize.com/hayne/plane/cj6.asp Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502790#502790 Attachments: http://forums.matronics.com//files/snot_1_firewall_189.jpg http://forums.matronics.com//files/snot_2_cockpit_valve_122.jpg http://forums.matronics.com//files/snot_3_belly_exit_100.jpg ________________________________ Message 3 _____________________________________ Time: 12:53:56 PM PST US Subject: Yak-List: Re: Compressor charging From: "easy_driver" there is a reason why sump bottles are located near compressor heads. by moving it away you turn the air line into a sump. instead of reinventing a wheel - put back AD-50 charge controller. it is on the original air system diagram. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502795#502795 ________________________________ Message 4 _____________________________________ Time: 01:26:53 PM PST US From: Jon Boede Subject: Yak-List: Foaming Oil New M-14P, still break-in period. Has been in the air but fighting with hig h oil temps. Previous flight end: 14.5L oil (week passes) Initial oil check: 10.5L oil Today flight end: 13.5L Oil is Aeroshell 120 (no W) straight mineral oil for break-in However... knowing that my oil wasn't really 10.5L because there wasn't +1 gallon of oil in the bucket, I ran the plane for 10 minutes outside the han gar. Carefully warmed it up to 50C oil temp 100C CHT, oil pressure 6+, not over 7. Cowl on. At the end of that period there was 16.5L of very aerated oil on the dipsti ck! Since the pressure was good and the OAT was only 80F I went flying. On take-off the oil pressure was 6.5 (I'd turned it up the previous weekend ) and the oil temp was about 50C. T/O was performed at 760 MAP and 2600 rp m, which was plenty enough power to get airborne. Two circuits around the pattern and the inlet oil temp got to over 70C and was rising very, very slowly (i.e. not stable). CHT very reasonable, 150-1 60C at 680mm MAP, 2400 rpm once I levelled off. I flew at pattern altitude the whole time. Oil pressure continued to drop and temperature continued to rise. After th e next circuit in the pattern, when oil pressure was about 3.7 and temperat ure about 77C, I landed. Oil pressure on taxi-in was 1 and temp continued to be about 80C. Very aerated oil on stick, "foam" is what I'd call it. Was 16.5L with all the air in it. Doing the math, that means about 25% of the volume of the a ir/oil mixture was air. Brand new oil cooler. Brand new hoses. Oil dilution system has been cappe d off. At this point the only non-stock components in the system are: Craig Payne' s oil filter, and a custom hose from Jill (that has a 90-degree swivel fitt ing on each end). Any ideas how air is getting mixed into the oil? I'm pretty sure at this p oint that both the high temp and the pressure drop are due to the air in th e oil but I can't understand how it's getting in there. Next moves are to bypass the oil filter and to try a different custom oil h ose. I'm all ears as to any other ideas. Jon PS. My oil overboard tube is cut to face into the wind, but both the other CJs in the hangar are similarly configured. It's not long enough to stick out below the cowl and I don't think that the prop blast would be enough t o create aeration during the initial run. ________________________________ Message 5 _____________________________________ Time: 04:04:35 PM PST US Subject: Yak-List: Re: Compressor charging From: "Ttail" Stephen, when you action your snot valve in the cockpit in valve what do you see on your Main Air guage ... I mean what happens ? -------- Sean Trestrail ttail[at]internode.on.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502797#502797 ________________________________ Message 6 _____________________________________ Time: 07:41:14 PM PST US Subject: RE: Yak-List: Re: Compressor charging From: Mark Bitterlich Q291bGQgeW91IHBsZWFzZSBleHBsYWluIHRoYXQgaW4gYSBsaXR0bGUgbW9yZSBkZXRhaWwgcGxl YXNlP8KgIFRoZSAzIGZlZXQgb2YgYWlyIGxpbmUgYmVmb3JlIHRoZSBzdGFuZGFyZCBzdW1wIGlz IG5vdCBhIHN1bXAuIEJ1dCBpZsKgIGl0IGlzIDYgZmVldCBsb25nIGl0IGJlY29tZXMgdGhlIHN1 bXA/Ci0tLS0tLS0tIE9yaWdpbmFsIG1lc3NhZ2UgLS0tLS0tLS1Gcm9tOiBlYXN5X2RyaXZlciA8 dGhhdG1haWxAeWFob28uY29tPiBEYXRlOiA3LzExLzIxICA0OjE4IFBNICAoR01ULTA1OjAwKSBU bzogeWFrLWxpc3RAbWF0cm9uaWNzLmNvbSBTdWJqZWN0OiBZYWstTGlzdDogUmU6IENvbXByZXNz b3IgY2hhcmdpbmcgLS0+IFlhay1MaXN0IG1lc3NhZ2UgcG9zdGVkIGJ5OiAiZWFzeV9kcml2ZXIi IDx0aGF0bWFpbEB5YWhvby5jb20+dGhlcmUgaXMgYSByZWFzb24gd2h5IHN1bXAgYm90dGxlcyBh cmUgbG9jYXRlZCBuZWFyIGNvbXByZXNzb3IgaGVhZHMuIGJ5IG1vdmluZyBpdCBhd2F5IHlvdSB0 dXJuIHRoZSBhaXIgbGluZSBpbnRvIGEgc3VtcC5pbnN0ZWFkIG9mIHJlaW52ZW50aW5nIGEgd2hl ZWwgLSBwdXQgYmFjayBBRC01MCBjaGFyZ2UgY29udHJvbGxlci4gaXQgaXMgb24gdGhlIG9yaWdp bmFsIGFpciBzeXN0ZW0gZGlhZ3JhbS4 ________________________________ Message 7 _____________________________________ Time: 08:07:56 PM PST US Subject: Yak-List: Re: Compressor charging From: "easy_driver" i would guess it's longer than 6 feet. and i would dare to postulate that air moving through small diameter thin-walled tube would loose its temperature. ( design of a heat exchanger ) but if someone wants to experiment - who am i to judge... markbitterlich(at)embarqm wrote: > Could you please explain that in a little more detail please? The 3 feet of air line before the standard sump is not a sump. But if it is 6 feet long it becomes the sump? > > -------- Original message -------- > From: easy_driver > Date: 7/11/21 4:18 PM (GMT-05:00) > To: yak-list@matronics.com > Subject: Yak-List: Re: Compressor charging > > > Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502799#502799 ________________________________ Message 8 _____________________________________ Time: 11:20:08 PM PST US From: Stephen van Dijck Subject: Re: Yak-List: Re: Compressor charging Hi Sean, Nothing. The Sukhoi only had one small bottle to start the engine. regards Stephen > On 12 Jul 2021, at 01:04, Ttail wrote: > > > Stephen, when you action your snot valve in the cockpit in valve what do you see on your Main Air guage ... I mean what happens ? > > -------- > Sean Trestrail > ttail[at]internode.on.net > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=502797#502797 > > > > > > > > > ------------------------------------------------------------------------------------- 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.