---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Mon 04/21/14: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:05 AM - Re: M-14P Air pump (A. Dennis Savarese) ________________________________ Message 1 _____________________________________ Time: 04:05:09 AM PST US From: "A. Dennis Savarese" Subject: Re: Yak-List: M-14P Air pump Here's a really good one.=0Ahttp://www.swagelok.com/search/find_products_ho me.aspx?part=SS-42GF2-A=0ADennis=0A=0A=0A=0A=0A__________________________ ______=0A From: Jim Burke =0ATo: "yak-list@matronics.com " =0ASent: Sunday, April 20, 2014 9:13 PM=0ASubjec t: Re: Yak-List: M-14P Air pump=0A =0A=0A=0AWho makes a 1/4 turn dump valve =C2-=0A=0ASent from my iPad=0A=0AOn Apr 20, 2014, at 4:27, "Richard Goode " wrote:=0A=0A=0AObviously the power requi red for the compressor depends on the pressure. But if it is at high pressu re =93 that is normal operating pressure, when the pressure-release v alve blows off and then a little later the compressor starts working again that is all at high pressure, when it uses about 2.5 hp, so not really noti ceable.=0A>=C2-=0A>But the opening of the release valve does not allow th e compressor to work off load =93 it has released some pressure, whic h makes the compressor then work again to build up the pressure in a contin uing cycle!=0A>=C2-=0A>But the real advantage of opening a "dump-valve" i s that the compressor then runs off-load for most of the time. In our exper ience the compressors are a weak part of these engines, and very often do n ot reach the engine TBO, but if running off-load, they will last indefinite ly.=0A>=C2-=0A>There is also a side advantage that if the compressor is n ot continuously working, it's not then putting some atmospheric water into the air system. Of course this shouldn't happen, but many people don't rele ase the water drain sufficiently often, and so it goes quite a long way to prevent this problem.=0A>=C2-=0A>Richard Goode Aerobatics=0A>Rhodds Farm =0A>Lyonshall=0A>Hereford=0A>HR5 3LW=0A>=C2-=0A>Tel:=C2- +44 (0) 1544 3 40120=0A>Fax: +44 (0) 1544 340129=0A>www.russianaeros.com=0A>=C2-=0A>From :owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronic s.com] On Behalf Of Todd McCutchan=0A>Sent: 20 April 2014 02:52=0A>To: yak- list@matronics.com=0A>Subject: Yak-List: M-14P Air pump=0A>=C2-=0A>How mu ch HP difference is there between a "loaded" and "unloaded" air compressor on the M-14P?=0A>=C2-=0A>I have heard of guys putting in a manual "bypass " dumping air from the compressor overboard to "unload" the compressor for more HP.=0A>=C2-=0A>I would think this is both=C2-=0A>=C2-=0A>A) mini mal increase in HP (1 - 2 HP?)=0A>=C2-=0A>And=0A>=C2-=0A>B) once your a ir is "topped off" doesn't the pressure relief valve or "pop off" valve ope n and perform the exact same function?=0A>=0A>Todd McCutchan=0A>T-34A & Yak -50=0A>Cell: (260) 402-1740=0A>E-mail: todd@fastaircraft.com=0A>www.fastair craft.com=0A>=C2-=0A>=C2-=0A>=0A>On Apr 19, 2014, at 6:24 PM, "A. Denni s Savarese" wrote:=0A>The pop off (pressure R ELIEF) valve is controlled by spring tension.=C2- The tighter you make th e "top hat" (turn it clockwise), the higher the pressure goes.=C2- When t he pressure reaches the preset spring pressure, the valve opens.=C2- The hiss is the pressure relief which stops when the pop off valve closes.=C2 - This is perfectly normal.=C2- It's just like the pressure relief valv e on a shop compressor.=C2- If the pressure in the compressor exceeds the pressure relief valve preset pressure, the valve opens and "dumps" the exc ess pressure.=0A>>Dennis=C2- =0A>>=C2-=0A>>=C2-=0A>>=0A>>____________ ____________________=0A>>=0A>>From:Jim Shanks =0A>> >Subject: Yak-List: Hissing Pop-Off Valve=0A>>=C2-=0A>>=C2-=C2-=C2- =0A>>When servicing the air system on our stock CJ, the pop-off valve begi ns =9Chissing=9D at around 32 ATM and =9Cpops-off =9D at around 38 ATM (not allowing system to be pressurized any higher.)=C2 - After popping off and servicing discontinued, hissing will continue (sl owly diminishing) until pressure settles at around 32 ATM.=C2- Although p robably plenty for a few start attempts, I want to fix the problem and have the full 50 ATM available.=0A>>=C2-=0A>>=C2- I know the valve is adjus table, but is the hissing a separate problem that needs to be addressed?=C2 - Also, what specifically is causing the valve to hiss?=0A>>=C2-=0A>>Th anks.=0A>>=C2-=0A>>Jim Shanks=0A>>shankeroid@verizon.net=0A>>=C2-=0A>>h ttp://ww"nofollow" target="_blank" href="http://forums.matronics.com/"> MailScanner has detected a possible fraud attempt from "f====== ====" claiming to be http://f===========0A>>=C2 -=0A>>=C2-=0A>>=C2-=0A>>=C2-=0A>>D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=0A>>ist"">http://www.matronics.c om/Navigator?Yak-ListMailScannerhas detected a possible fraud attempt from "f==========" claiming to be=0A>>D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=0A>>//forums.matron ics.comMailScanner has detected a possible fraud attempt from "f=== =======" claiming to be=0A>>D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=0A>>ot;">http://www.matronics .com/contributionMailScannerhas detected a possible fraud attempt from "f ==========" claiming to be=0A>>D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=0A>>=C2-=0A>=C2- =0A>=C2-=0A>http://www.matronics.com/Navigator?Yak-List=0A>http://forums. matronics.com=0A>http://www.matronics.com/contribution=0A>=C2-=0A>=0A>-- =0A>This message has been scanned for viruses and =0A>dangerous content by MailScanner, and is =0A>believed to be clean. =0A>D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=0Aist"">http://www.matr onics.com/Navigator?Yak-List=0AD=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=0A//forums.matronics.com=0AD=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=0Aot;">http:/ /www.matronics.com/contribution=0AD=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =========================0A =========================0A ======================= ------------------------------------------------------------------------------------- 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.