---------------------------------------------------------- Commander-List Digest Archive --- Total Messages Posted Tue 09/08/09: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:11 AM - Re: low suction mystery (Gary Moshluk) 2. 05:41 AM - Re: Want to purchase a 680FLP (Mr.RPM) (Philip Guziec) 3. 07:24 AM - Re: Want to purchase a 680FLP (Mr.RPM) (Tom Fisher) 4. 11:11 AM - 500A Colemill (Dan Farmer) 5. 12:14 PM - Re: 500A Colemill (Barry Collman) ________________________________ Message 1 _____________________________________ Time: 05:11:52 AM PST US From: "Gary Moshluk" Subject: Re: Commander-List: low suction mystery It appears the replacement pump I received was weak as well. I'm going to try another pump and report the results. ----- Original Message ----- From: Scottmain2003@aol.com To: commander-list@matronics.com Sent: Monday, September 07, 2009 8:40 AM Subject: Re: Commander-List: low suction mystery I had similar experience with my L-26. I isolated each segment of the plumbing and tested one by one and eventually found the culprit. the hard line from the inside upper left of the right engine nacelle that goes through the bulkhead and connects to another hard line just to the right of the oil cover had chaffed through and had a fairly large hole allowing ambient air to enter there. I had to take the inspection covers off that area on the wing upper panel to repair the hole and then all worked fine. a vacuum cleaner connected to the hose at the pump made enough of a suction noise at the hole to find the problem. Probably been that way for years as the pressure controller was cranked all the way in in an attempt to compensate for the bleed problem. hope that helps scott In a message dated 9/1/2009 11:09:10 A.M. Eastern Daylight Time, moe-rosspistons@hotmail.com writes: Gary, Have you tested the pump alone by connecting a hose directly to the pump with the remainder of the system not in the loop? Moe N680RR 680Fp From: Gary Moshluk Sent: Monday, August 31, 2009 6:26 PM To: Commander Chat Subject: Commander-List: low suction mystery To all Commander aficionados, Having an issue with low suction specifically when running the left engine alone. The right engine system is operating normally without the left engine running producing about 4.2 Hg of suction. The left engine alone will only produce 2.2 to 2.3 Hg max even at higher RPM settings. I have a straight 560 fitted with dual wet suction pumps. The engine driven vac pumps are piped to bulkhead fittings on each firewall into the nacelle. The bulkhead fitting is connected to the regulator (via hose and clamps). The regulator is "T"'d for attaching the low vacuum switch and check valve, thence to the hardline forward to the instrument panel. Ostensibly the dual check valves protect the operating vacuum source from an open leak on the opposite side When I rebuilt the instrument panel I relocated the engine gages, centering them over/above the throttle pedestal to allow for a panel mounted radio stack AND I added an artificial horizon, DG (airspeed and altimeter) to the co-pilot side. Harry Merrit sent me a used vacuum pump and regulator; both of which I installed today. Best I can get off the left side vacuum pump is 2.2 HG of suction. The regulator adjustments so far have had a negligible effect on the suction pressure. I had thought up until today the problem resided with the (engine driven) pump and/or regulator ahead of the check valve in the left nacelle but the pump and regulator still won't get me the required suction off the left side. Anyone out there with a theory as to what I should be looking for? Gary (c.s "Blaster") href="http://www.matronics.com/Navigator?Commander-List">http://www.mat ronics.com/Navigator?Commander-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c t href="http://www.matronics.com/Navigator?Commander-List">http://www.mat ronics.com/Navigator?Commander-List ms.matronics.com/">http://forums.matronics.com tp://www.matronics.com/contribution">http://www.matronics.com/contributio n ------------------------------------------------------------------------- ----- ________________________________ Message 2 _____________________________________ Time: 05:41:19 AM PST US From: Philip Guziec Subject: Re: Commander-List: Want to purchase a 680FLP (Mr.RPM) Maybe you could buy this one: http://www.mrrpm.com/ *grin* Phil ________________________________ Message 3 _____________________________________ Time: 07:24:38 AM PST US From: "Tom Fisher" Subject: Re: Commander-List: Want to purchase a 680FLP (Mr.RPM) That would be interesting. Tom formally C-GISS ----- Original Message ----- From: "Philip Guziec" Sent: Tuesday, September 08, 2009 5:28 AM Subject: Re: Commander-List: Want to purchase a 680FLP (Mr.RPM) > > > Maybe you could buy this one: > > http://www.mrrpm.com/ > > *grin* > > Phil > > > ________________________________ Message 4 _____________________________________ Time: 11:11:39 AM PST US From: Dan Farmer Subject: Commander-List: 500A Colemill Posted on barnstormer.com =C2- AVAILABLE SOON =A2 Low Time, NDH 3600+Hr. NDH Airframe, Hartzell 3 Bl ade, Dynamically Balanced "0" TSO Props. Engines TSO 1300+ Recent New 7 Pax Tan Leather Interior w/Super Soundproofing installed. Recent Complete Stri p/Treat/Paint, JPI EDM760, Winglets with Recognition Lights and Strobes. Sh rike Nose, 300 HP, Colemill Conversion IO520E Engines, New Exhaust, A1 Spec trometric Oil Analysis, Stormscope WX-10, Century IIB Autopilot w/Radio Cou pler. KX155 Nav/Com w/Glidescope and KX209 Nav. Indicator. KT76A Transponde r. Wonderful aircraft for Upgrade! Sold with New Annual. Worth Waiting For! ! Price Firm =A2 Contact Jerry Schofield - TCH&S , Owner - located Ca stle Rock, CO USA =A2 Telephone: 1 303 908 0396 . 1 303 663 3963 . 1 902 245 0622 =A2 Fax: 1 303 663 3973 =A2 Posted =0A=0A=0A ________________________________ Message 5 _____________________________________ Time: 12:14:42 PM PST US From: "Barry Collman" Subject: Re: Commander-List: 500A Colemill Hi Guys, This has got to be N520JS, s/n 1130-60, converted to a Colemill "Super 300" in October 1966. Best Regards, Barry ----- Original Message ----- From: Dan Farmer To: commander-list-digest@matronics.com Sent: Tuesday, September 08, 2009 7:10 PM Subject: Commander-List: 500A Colemill Posted on barnstormer.com AVAILABLE SOON =A2 Low Time, NDH 3600+Hr. NDH Airframe, Hartzell 3 Blade, Dynamically Balanced "0" TSO Props. Engines TSO 1300+ Recent New 7 Pax Tan Leather Interior w/Super Soundproofing installed. Recent Complete Strip/Treat/Paint, JPI EDM760, Winglets with Recognition Lights and Strobes. Shrike Nose, 300 HP, Colemill Conversion IO520E Engines, New Exhaust, A1 Spectrometric Oil Analysis, Stormscope WX-10, Century IIB Autopilot w/Radio Coupler. KX155 Nav/Com w/Glidescope and KX209 Nav. Indicator. KT76A Transponder. Wonderful aircraft for Upgrade! Sold with New Annual. Worth Waiting For!! Price Firm =A2 Contact Jerry Schofield - TCH&S , Owner - located Castle Rock, CO USA =A2 Telephone: 1 303 908 0396 . 1 303 663 3963 . 1 902 245 0622 =A2 Fax: 1 303 663 3973 =A2 Posted ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message commander-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Commander-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/commander-list Browse Digests http://www.matronics.com/digest/commander-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.