---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Tue 10/18/11: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:13 AM - Re: Cowl Install (Phil Kelsey) 2. 08:35 PM - Re: Cowl Install (Gary Vogt) ________________________________ Message 1 _____________________________________ Time: 06:13:22 AM PST US From: "Phil Kelsey" Subject: RE: TeamGrumman-List: Cowl Install Gary thanks for the info. I know I saw that template in my email at one time, can't find it now. Could you resend it to me? Phil From: owner-teamgrumman-list-server@matronics.com [mailto:owner-teamgrumman-list-server@matronics.com] On Behalf Of Gary L Vogt Sent: Monday, October 17, 2011 23:59 Subject: Re: TeamGrumman-List: Cowl Install 1. The plexiglass goes between landing light housing and the cowling. 2. Good question. Actually, it needs to go just slightly in. Normally, I make it parallel to the longitudinal axis as a rule. 3. Cut the opening to the end of the ramp. You don't need to fill the opening. The airflow is out of the cowling. If it were an issue, I'd make you fill the hole behind the nose strut. You can add another nut plate if you like to attach the open ends to the firewall. Did you see the template I sent out for the cutout? Gary Sent from my iPad On Oct 17, 2011, at 9:30 AM, "Phil Kelsey" wrote: Gary, finally working on installing the new cowling on my Grumman. Some questions - Do you put the plexiglass cover over the landing light as it is on the original cowl, or do you leave it off? - On the powerflow exhaust do you align the muffler with the longitudinal axis or angle it slightly outboard? - Do you cut the cowling in such a way as to be able to remove the right hand side of the bottom cowling without removing the muffler? I assume that to do that you fabricate a plate to close the slot and maintain integrity of the cowl. Phil Kelsey ReliantAir From: owner-teamgrumman-list-server@matronics.com [mailto:owner-teamgrumman-list-server@matronics.com] On Behalf Of Gary Vogt Sent: Thursday, October 06, 2011 13:45 Subject: Re: TeamGrumman-List: Short-stack Powerflow exhaust - aerodynamic cover for it? Hi Pete, I've made 3 different fairings that fit behind the short stack. The short one worked the best. Plus, it fits up snug behind the pipe so it closes the hole created when you cut out the exit ramp. I can have Dave make you one for $100 with shipping. You'll need to do some trial and error on the mounting to get the least drag. My 77 Cheetah would true out at about 140 knots. That's running over redline. McCauley prop. Stock exhaust. It was light too. One radio. One GPS. No VOR. But, even with ported and polished cylinders and the HC mod, a loaded Tiger would out climb it. Lots of drag. I buried the comm antennas, got rid of the VOR antennas and steps. I restored a 77 Cheetah a few years back. He did everything to that plane. With a New LyCon engine and Sensenich prop, he could true at 142 knots at 2800 RPM with the steps and VOR antennas. Gary _____ From: Pete Kuhns Sent: Thursday, October 6, 2011 7:32 AM Subject: TeamGrumman-List: Short-stack Powerflow exhaust - aerodynamic cover for it? Hi Gary: My plane has the short stack Powerflow exhaust. I think it's kinda draggy up there and was wondering if you ever made some covering for it that reduced it's airflow 'signature' (parasitic drag). The oil vent tube also is kinda draggy down there. Just wondering where you found speed improvements on the Cheetah by reducing parasitic drag. Thank you! -- Pete Kuhns N27161, '79 Cheetah GEZ, Shelbyville, IN ====== Email scanned by PC Tools - No viruses or spyware found. 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(Email Guard: 7.0.0.26, Virus/Spyware Database: 6.18530) http://www.pctools.com ======= ________________________________ Message 2 _____________________________________ Time: 08:35:44 PM PST US From: Gary Vogt Subject: Re: TeamGrumman-List: Cowl Install Phil,=C2-=0A=0ASure, no problem.=0A=0AHere is the template.=0A=0A=0A_____ ___________________________=0AFrom: Phil Kelsey =0ATo: teamgrumman-list@matronics.com=0ASent: Tuesday, October 18, 2011 6:10 AM =0ASubject: RE: TeamGrumman-List: Cowl Install=0A=0A=0A =0AGary thanks for the info.=C2- I know I saw that template in my=0Aemail at one time, can =99t find it now.=C2- Could you resend it to me?=0A=C2-=0APhil=0A =C2-=0AFrom:owner-teamgrumman-list-server@matronics.com=0A[mailto:owner-t eamgrumman-list-server@matronics.com] On Behalf Of Gary L=0AVogt=0ASent: Mo nday, October 17, 2011 23:59=0ATo: teamgrumman-list@matronics.com=0ASubject : Re: TeamGrumman-List: Cowl Install=0A=C2-=0A1. =C2-The plexiglass goe s between landing light housing=0Aand the cowling.=C2-=0A=C2-=0A2. =C2 -Good question. =C2-Actually, it needs to go just=0Aslightly in. =C2- Normally, I make it parallel to the longitudinal axis as a=0Arule.=C2-=0A =C2-=0A3. =C2-Cut the opening to the end of the ramp. You don't=0Aneed to fill the opening. =C2-The airflow is out of the cowling. =C2-If it =0Awere an issue, I'd make you fill the hole behind the nose strut.=C2- =0A=C2-=0AYou can add another nut plate if you like to attach the open=0A ends to the firewall.=C2-=0A=C2-=0ADid you see the template I sent=0Aou t for the cutout?=0AGary=0ASent from my iPad=0A=0AOn Oct 17, 2011, at 9:30 AM, "Phil Kelsey" wrote:=0AGary,=0Afinally working on installing the new cowling on my Grumman.=C2- Some=0Aquestions=0A>=C2- =0A>-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2- Do you put the plexiglass cover over the landing light as it is=0Aon the original cowl, or do you leave it off?=0A>-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2- =C2- On the powerflow exhaust do you align the muffler with the=0Alongitu dinal axis or angle it slightly outboard?=0A>-=C2-=C2-=C2-=C2-=C2 -=C2-=C2-=C2-=C2- Do you cut the cowling in such a way as to be a ble to remove the=0Aright hand side of the bottom cowling without removing the muffler?=C2- I=0Aassume that to do that you fabricate a plate to clos e the slot and maintain=0Aintegrity of the cowl.=0A>=C2-=0A>Phil=0AKelsey =0A>ReliantAir=0A>=C2-=0A>From:owner-teamgrumman-list-server@matronics.co m [mailto:owner-teamgrumman-list-server@matronics.com] On Behalf Of Gary=0A Vogt=0A>Sent: Thursday, October 06, 2011 13:45=0A>To: teamgrumman-list@matr onics.com=0A>Subject: Re: TeamGrumman-List: Short-stack Powerflow exhaust - =0Aaerodynamic cover for it?=0A>=C2-=0A>Hi=0APete,=C2-=0A>=C2-=0A>I'v e=0Amade=C2-3 different fairings=C2-that fit behind the short stack. =C2-The=0Ashort one worked the best. =C2-Plus, it fits up snug behind t he pipe so it=0Acloses the hole created when you cut out the exit ramp. =C2 -I can have Dave=0Amake you one for $100 with shipping. =C2-You'll need to do some trial and=0Aerror on the mounting to get the least drag. =C2- =0A>=C2-=0A>My=0A77 Cheetah would true out at about 140 knots. =C2-That 's running over=0Aredline. =C2-McCauley prop. =C2-Stock exhaust. =C2- It was light too.=0A=C2-One radio. =C2-One GPS. =C2-No VOR. =C2-But , even with ported and=0Apolished cylinders and the HC mod, a loaded Tiger would out climb it. =C2-=0A>=C2-=0A>Lots=0Aof drag. =C2-I buried the comm antennas, got rid of the VOR antennas and=0Asteps. =C2-=0A>=C2-=0A >I=0Arestored a 77 Cheetah a few years back. =C2-He did everything to tha t plane.=0A=C2-With a New LyCon engine and Sensenich prop, he could true at 142 knots at=0A2800 RPM with the steps and VOR antennas.=0A>=C2-=0A>Ga ry=0A>=C2-=0A>=0A>________________________________=0A> =0A>From:Pete Kuhn s =0A>To: teamgrumman-list@matronics.com=0A>Sent: Thursda y, October 6, 2011 7:32 AM=0A>Subject: TeamGrumman-List: Short-stack Powerf low exhaust - aerodynamic=0Acover for it?=0A>=0A>=0A>=0A>=0A>Hi Gary: My pl ane has the short=0Astack Powerflow exhaust. I think it's kinda draggy up t here and was wondering=0Aif you ever made some covering for it that reduced it's airflow 'signature'=0A(parasitic drag). The oil vent tube also is kin da draggy down there. =0A>=0A>Just wondering where you found speed improvem ents on the Cheetah by reducing=0Aparasitic drag. Thank you! =0A>=0A>=0A>-- Pete Kuhns=0A>N27161, '79 Cheetah=0A>GEZ, Shelbyville, IN=0A>=0A>=0A>=0A> =0A>=C2-=0A>=0A>=0A>=0A>=0A>=0A>========0A>Email scanned by PC Tools - No viruses or spyware found.=0A>(Email Guard: 7.0.0.26, Virus/S pyware Database: 6.18280)=0A>http://www.pctools.com=0A>====== = =0A>=C2-=0A>=C2-=0A>=C2-=0A=C2-=0A=C2-=0Ahttp://www.matronics .com/Navigator?TeamGrumman-List=0Ahttp://forums.matronics.com=0Ahttp://www. matronics.com/contribution=0A=C2-=0A=0A=0A=0A=0A=0A======= =0AEmail scanned by PC Tools - No viruses or spyware found.=0A(Email Guard: 7.0.0.26, Virus/Spyware Database: 6.18530)=0Ahttp://www.pctools.com=0A= =========================0A ======================= ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message teamgrumman-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/TeamGrumman-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/teamgrumman-list Browse Digests http://www.matronics.com/digest/teamgrumman-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.