---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Sat 02/14/04: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:09 PM - Re: Powerflow exhaust and empty weight (TeamGrumman@aol.com) 2. 12:40 PM - Re: Powerflow exhaust and empty weight (flyv35b) 3. 05:34 PM - Horizontal attach (TeamGrumman@aol.com) 4. 07:26 PM - Re: Horizontal attach (flyv35b) ________________________________ Message 1 _____________________________________ Time: 12:09:25 PM PST US From: TeamGrumman@aol.com Subject: Re: TeamGrumman-List: Powerflow exhaust and empty weight --> TeamGrumman-List message posted by: TeamGrumman@aol.com In a message dated 02/13/04 11:13:22 AM, drychlik@sbcglobal.net writes: > Three questions for the group. What is the empty weight of your aircraft? > Second does anyone have some good information about the performance gains with > the Powerflow exhaust on a Tiger. Has anyone done any cylinder work to > improve performance? > The empty weight on my Cheetah was 1328. It had one Trimble GPS, Argus 300 moving map, one Narco 810R, standard range (38 gal) tanks, NO VOR, no DME, no audio panel (telex Pro-comm-4 intercom), no ADF, no sound deadening insulation, no carpet in the baggage area (just a rubber mat), no extra wires, no unnecessary wire tie, no steps, buried com antenna, no red flashing beacon (3-point strobes) and LyCon cylinders. I could true about 140 knots. I've flown a lot of planes with Powerflow. I've installed 3 (or 4, I forget) of them. With the exception of the S-bend which points the exhaust through the cowling and the pipe hanging in the breeze, it's a sweet system. I've seen pictures of a Powerflow on a Mooney and they keep it in the cowling. It's actually something I'm looking into on my new cowling. ... that is, keeping the pipe inside. Gary ________________________________ Message 2 _____________________________________ Time: 12:40:42 PM PST US From: "flyv35b" Subject: Re: TeamGrumman-List: Powerflow exhaust and empty weight --> TeamGrumman-List message posted by: "flyv35b" That's the way it should have been done in the first place. But Power Flow seemed to think they couldn't do it. I'd question that. Cliff A&P/IA ----- Original Message ----- From: Subject: Re: TeamGrumman-List: Powerflow exhaust and empty weight > --> TeamGrumman-List message posted by: TeamGrumman@aol.com > > > In a message dated 02/13/04 11:13:22 AM, drychlik@sbcglobal.net writes: > > > > Three questions for the group. What is the empty weight of your aircraft? > > Second does anyone have some good information about the performance gains with > > the Powerflow exhaust on a Tiger. Has anyone done any cylinder work to > > improve performance? > > > The empty weight on my Cheetah was 1328. It had one Trimble GPS, Argus 300 > moving map, one Narco 810R, standard range (38 gal) tanks, NO VOR, no DME, no > audio panel (telex Pro-comm-4 intercom), no ADF, no sound deadening > insulation, no carpet in the baggage area (just a rubber mat), no extra wires, no > unnecessary wire tie, no steps, buried com antenna, no red flashing beacon (3-point > strobes) and LyCon cylinders. I could true about 140 knots. > > I've flown a lot of planes with Powerflow. I've installed 3 (or 4, I > forget) of them. With the exception of the S-bend which points the exhaust through > the cowling and the pipe hanging in the breeze, it's a sweet system. I've > seen pictures of a Powerflow on a Mooney and they keep it in the cowling. > It's actually something I'm looking into on my new cowling. ... that is, > keeping the pipe inside. > > Gary > > ________________________________ Message 3 _____________________________________ Time: 05:34:38 PM PST US From: TeamGrumman@aol.com Subject: TeamGrumman-List: Horizontal attach --> TeamGrumman-List message posted by: TeamGrumman@aol.com I just got another Tiger with cracks. I've looked at this pretty carefully and if you want my opinion (well, even if you don't) replacing the cracked stiffener with the same part is the WRONG way to do it. In the first place, there is nothing wrong with the bonded joints, The stiffener cracked where it's attached to the vertical supports. I am going to talk to a DER on Monday, or sooner if I can locate one, and find a way to put a doubler over the crack. It's my opinion that more damage to the skin and adjoining structure by replacing the cracked parts (which will crack again anyway). Do I hear any yeas, or nays? ________________________________ Message 4 _____________________________________ Time: 07:26:29 PM PST US From: "flyv35b" Subject: Re: TeamGrumman-List: Horizontal attach --> TeamGrumman-List message posted by: "flyv35b" I would agree with you Gary. In any kind of riveted joint you wouldn't think twice about replacing the whole member due to a simple crack. Who knows, the crack may have been there for hundreds of hours and is going nowhere. I (personally) think that if it is just a small crack in either the horizontal or vertical angle, where they join, that easy and satisfactory solution would be to rivet an L-shaped piece that goes around the corner and rivets to both angles. Use .040 say and put a nice .5-1.0 in. radius at the intersection. End of story and crack. I wouldn't even consider this a major repair and no specific approval is needed (that's my opinion of course). Cliff A&P/IA ----- Original Message ----- From: Subject: TeamGrumman-List: Horizontal attach > --> TeamGrumman-List message posted by: TeamGrumman@aol.com > > I just got another Tiger with cracks. > > I've looked at this pretty carefully and if you want my opinion (well, even > if you don't) replacing the cracked stiffener with the same part is the WRONG > way to do it. In the first place, there is nothing wrong with the bonded > joints, The stiffener cracked where it's attached to the vertical supports. > > I am going to talk to a DER on Monday, or sooner if I can locate one, and > find a way to put a doubler over the crack. It's my opinion that more damage to > the skin and adjoining structure by replacing the cracked parts (which will > crack again anyway). > > Do I hear any yeas, or nays? > >