---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Mon 07/13/15: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:55 AM - Re: Housai vents/breathers (jblake207@comcast.net) 2. 09:43 AM - Re: Re: Housai vents/breathers (Walter Lannon) 3. 10:12 AM - Re: Re: Housai vents/breathers (doug sapp) 4. 06:54 PM - Mystery Flow Restrictor (jetjockey) 5. 08:10 PM - Re: Mystery Flow Restrictor (Walter Lannon) 6. 08:47 PM - Re: Mystery Flow Restrictor (jetjockey) ________________________________ Message 1 _____________________________________ Time: 06:55:49 AM PST US From: jblake207@comcast.net Subject: Re: Yak-List: Housai vents/breathers Cleanest engine=C2-compartment I've ever seen!=C2- =C2-Looks like a m useum restoration that never flies... Beautiful!=C2- JB ----- Original Message ----- From: "Walter Lannon" Sent: Sunday, July 12, 2015 12:12:18 PM Subject: Re: Yak-List: Housai vents/breathers Where is the oil getting out? Forgetting the air/oil separator for the moment if you connect the front case to main case vent line there is no vent outlet unless the oil tank ven t has been modified to connect with the main. Where is the separator mounted and what is the size. =C2- =C2-If not HI GH and BIG it probably wont do the job The M14 as mounted in the Yk 52,etc. has all the aerobatic goodies, effective separator, vent change-over valve, etc. Some CJ photos attached. m: glipaz Sent: Saturday, July 11, 2015 9:36 PM Subject: Yak-List: Housai vents/breathers On the Housai, if I connect the nose case breather to the crank case breather (and connect them to an air-oil separator), it causes lots of oil to come out of the crank breather. =C2- Removing the connection between t he nose and crank breathers relieves the problem. =C2- On M-14's, connecting these breathers is common practice. =C2- Any thoughts on why this is the case i n the Housai? =C2- =C2-:? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=444668#444668 ________________________________ Message 2 _____________________________________ Time: 09:43:48 AM PST US From: "Walter Lannon" Subject: Re: Yak-List: Re: Housai vents/breathers Gil; In the stock system the large, fwd. facing tube is the main case vent outlet. Connecting the nose case vent to that means there is no longer a vent unless you have provided another outlet. At minimum that would be a connection to the oil tank allowing it's separate vent to handle the whole system. The separator is my own design. There are other good ones on the market but location is very important (High & Hot) and the connections must be in the right places. Walt -----Original Message----- From: glipaz Sent: Sunday, July 12, 2015 9:50 PM Subject: Yak-List: Re: Housai vents/breathers Thank you Walt. This looks like a well-designed system. What brand/model is the separator? Back to my original question, i am still wondering why closing the nose vent or connecting it to the case vent causes the case to be over-pressurized and start venting oil. Gil Read this topic online here: http://forums.matronics.com/viewtopic.php?p=444687#444687 ________________________________ Message 3 _____________________________________ Time: 10:12:51 AM PST US Subject: Re: Yak-List: Re: Housai vents/breathers From: doug sapp Walt, Not really the direct topic of this thread but: Am I incorrect to assume that if you have the front and rear vents connected with a line which DOES NOT tee into the oil cooler (as it should), the only source of air to pressurize the case and expel oil would have to come from one of two sources, either cylinder valve or ring blow by or a leaking super charger seal. How else would it be possible to pressurize the case? Doug On Mon, Jul 13, 2015 at 9:40 AM, Walter Lannon wrote: > > Gil; > > In the stock system the large, fwd. facing tube is the main case vent > outlet. Connecting the nose case vent to that means there is no longer a > vent unless you have provided another outlet. At minimum that would be a > connection to the oil tank allowing it's separate vent to handle the whole > system. > The separator is my own design. There are other good ones on the market > but location is very important (High & Hot) and the connections must be in > the right places. > > Walt > > -----Original Message----- From: glipaz > Sent: Sunday, July 12, 2015 9:50 PM > To: yak-list@matronics.com > Subject: Yak-List: Re: Housai vents/breathers > > > Thank you Walt. This looks like a well-designed system. What brand/model > is the separator? Back to my original question, i am still wondering why > closing the nose vent or connecting it to the case vent causes the case to > be over-pressurized and start venting oil. > Gil > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=444687#444687 > > -- *Doug* You have to make up your mind about growing up and becoming a pilot. You can't do both. ________________________________ Message 4 _____________________________________ Time: 06:54:33 PM PST US Subject: Yak-List: Mystery Flow Restrictor From: "jetjockey" While removing some engine hoses today, I came across a flow restrictor that obviously came out of one of the hoses I removed. The only hoses I had removed at the time I found the flow restrictor were the Manifold Pressure hose, Primer Hose, and the Oil and Fuel Pressure hoses. Does anyone have any idea which one of these hoses it could have come from and which port (engine or firewall) it needs to go on? I have scoured the manuals and the only reference to flow restrictors I find are related to the landing gear system. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=444713#444713 ________________________________ Message 5 _____________________________________ Time: 08:10:38 PM PST US From: "Walter Lannon" Subject: Re: Yak-List: Mystery Flow Restrictor Oil and fuel pressure hoses at the unit end. Approx. 0.010" fuel and 0.020" oil. -----Original Message----- From: jetjockey Sent: Monday, July 13, 2015 6:51 PM Subject: Yak-List: Mystery Flow Restrictor While removing some engine hoses today, I came across a flow restrictor that obviously came out of one of the hoses I removed. The only hoses I had removed at the time I found the flow restrictor were the Manifold Pressure hose, Primer Hose, and the Oil and Fuel Pressure hoses. Does anyone have any idea which one of these hoses it could have come from and which port (engine or firewall) it needs to go on? I have scoured the manuals and the only reference to flow restrictors I find are related to the landing gear system. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=444713#444713 ________________________________ Message 6 _____________________________________ Time: 08:47:59 PM PST US Subject: Yak-List: Re: Mystery Flow Restrictor From: "jetjockey" Thanks Walt. I was thinking that was probably the one but I did not remember it having one when I last rebuilt the hose some years ago. Ray Read this topic online here: http://forums.matronics.com/viewtopic.php?p=444718#444718 ------------------------------------------------------------------------------------- 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.