---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Thu 05/19/05: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:06 AM - Re: Fuel Injection Adjustments (this belongs in the archives many times...) (Philip Condon) 2. 07:16 AM - Re: Prop ballancing article (reprint) (Philip Condon) 3. 10:55 AM - Re: Fuel Tank leak testing (Robert E. Newhall II) 4. 02:39 PM - Re: Re: Prop ballancing article (reprint) (LarryRobertHelming) 5. 05:47 PM - New Rattle Can Primer ?? Dupont 4115s Just FYI (Bill Schlatterer) 6. 07:35 PM - Terra TPX 720 (R. Craig Chipley) 7. 07:55 PM - Re: Terra TPX 720 (Ed Anderson) 8. 10:51 PM - Hanging Plans (Brad Oliver) ________________________________ Message 1 _____________________________________ Time: 07:06:51 AM PST US From: "Philip Condon" Subject: RV-List: Re: Fuel Injection Adjustments (this belongs in the archives many times...) --> RV-List message posted by: "Philip Condon" Subject: RV-List: RE: Bendix Servo Adjustments > --> RV-List message posted by: "Stewart, Michael (ISS Atlanta)" > > > Thanks for the great reply Mahlon. > > I have fwd to the list for future reference. > > > And thanks for all your work on this and other lists. You have been a > tremendous resource. > > > Mike > > > -----Original Message----- > From: Mahlon_Russell@teledyne.com [mailto:Mahlon_Russell@teledyne.com] Lean mixture rpm rise hesitation fuel injection servo bendix leaning enrichen Enrichment idle shutoff (key words for future electronic searching of this text) > To: Stewart, Michael (ISS Atlanta) > Subject: Bendix Servo Adjustments > > > Hi, There are no field adjustments to the servo for anything other then > idle speed and mixture. There is an idle speed screw on the side of the > servo where the throttle control cable hooks up. In faster out > slower. set for 6-700 RPM warmed up. To adjust the mixture you will note > a turnbuckle arrangement linkage connecting the throttle shaft to a > mixture arm on the servo. This arrangement has two rectangular blocks > with a serrated wheel in the center. the wheel is turnable and IS > prevented from turning by a spring stretched across the serrations. If > you looked at this wheel as the head of a bolt turning the head of the > bolt toward the throttle plate will make the engine richer and away from > the plate will make it leaner. If that doesn't make sense , look closely > at the blocks of the turnbuckle, one of them will have a "R" and an > arrow on it. turning the wheel in the direction of the arrow will make > it richer. set for 25 rpm rise when slowly leaning the engine out at > idle rpm. making it richer will increase the rise and leaner will > decrease the rise. once you have the proper rise. quickly accelerate the > engine , if it will accelerate smoothly without hesitation you are all > set. if not enrichen the idle mixture until it will. double check the > speed and you should be all set. If you need any adjustments to fuel > flow at power, that must be done on a flow bench and isn't field > adjustable. > > Good Luck, > > Mahlon > > 1-800-624-6680 ext.305 > www.mattituck.com > > ________________________________ Message 2 _____________________________________ Time: 07:16:22 AM PST US From: "Philip Condon" Subject: RV-List: RE: Prop ballancing article (reprint) --> RV-List message posted by: "Philip Condon" Clipped from the website so we have it in the archives for posterity. This is clever and cheap. Reminds me of my cheap and clever bore scope (Exterior door peephole glass, rubber grommet and a adjustable/focusable flashlight ((name escapes me)) ....... On the topic of Prop Balancing, here is an inexpensive way to get a smoother running engine. It was submitted by Ben Favrholdt, N66MX, of Porterville, California. Note that he is talking about his wood propeller. Cut a piece of aluminum, making a disk about 3 inches wide and 6 inches long. Glue a suction cup on one side of the disk. You can use one from Aircraft Spruce, P/N 13-00088 at $2.95. See photo below. Next, attach a spring steel reed at the top end of the disk. A coping saw blade will probably work okay. Attach an adjustable weight on the reed. Mount the assembly by suction to the face of one of the instruments on the panel. In flight, you will see a deflection of the reed due to normal vibration. By experimenting with different RPM's and weight positions on the reed, you should be able to find a combination where there will be harmonic resonance, where the reed will deflect to a much greater extent. Note these settings. Now paint the outer two or three inches of one blade of the propeller. Obviously, if the deflections are now greater than before, you painted the heavier side of the prop. Now work on the other blade until you get minimum deflection. It seems simple, but it works. I used a spray can to paint, and doesn't take much paint since there is a long arm and requires little weight to have an effect. I don't know if this will work on a metal prop because of the larger mass ________________________________ Message 3 _____________________________________ Time: 10:55:43 AM PST US From: "Robert E. Newhall II" Subject: RV-List: Re: Fuel Tank leak testing --> RV-List message posted by: "Robert E. Newhall II" To whoever is about to test their tanks, the manometer idea is good for knowing how much air pressure you're putting in (approx 28 inches of water is about one psi) but if you want to save the time and guess work of wondering about barometric changes, just spray the tank down with soapy water. You'll see the leaks instantly. I found one leak at the BNC connector, fixed it, and have had no more leaks with the exception of the access plates. On a side note, you might consider throwing away those cork gaskets for the access plates and just proseal the plates on. I used the cork and recently had seeps after flying for a year. I have just re-installed them with proseal. Bob Newhall RV7, Flying 90hrs Boulder, CO --> RV-List message posted by: "Douglas A. Fischer" > A question from a first-timer to the experienced folks out there in RV Land. I'm currently pressure testing my first tank with a manometer. I started on the 9th of May and the level on the open end of the tube has varied up and down in about a 5-inch range (it's currently in about the middle of that range - about a 23 inch difference between the column heights). My guess is this is primarily caused by barometric pressure and temp but my question is: when do you call it a day and say definitively the tank doesn't leak? I'm beginning to feel it's safe after 8 days, but want to get educated opinions. Pretty soon I'll have to take into account evaporation of the water in the tube! Doug Fischer RV-9A 90706 Wings Jenison, MI Stay connected, organized, and protected. Take the tour: http://tour.mail.yahoo.com/mailtour.html ________________________________ Message 4 _____________________________________ Time: 02:39:10 PM PST US From: "LarryRobertHelming" Subject: Re: RV-List: RE: Prop ballancing article (reprint) --> RV-List message posted by: "LarryRobertHelming" The photo did not come through. It must be uploaded to someone's website and displayed by clicking on the URL. I would like to see it if that can be accomplished. Indiana Larry, RV7 Tip Up It Flies ----- Original Message ----- From: "Philip Condon" Subject: RV-List: RE: Prop ballancing article (reprint) > --> RV-List message posted by: "Philip Condon" > > Clipped from the website so we have it in the archives for posterity. > > This is clever and cheap. Reminds me of my cheap and clever bore scope > (Exterior door peephole glass, rubber grommet and a adjustable/focusable > flashlight ((name escapes me)) > ....... > > On the topic of Prop Balancing, here is an inexpensive way to get a > smoother > running engine. It was submitted by Ben Favrholdt, N66MX, of Porterville, > California. Note that he is talking about his wood propeller. > > > Cut a piece of aluminum, making a disk about 3 inches wide and 6 inches > long. Glue a suction cup on one side of the disk. You can use one from > Aircraft Spruce, P/N 13-00088 at $2.95. See photo below. > Next, attach a spring steel reed at the top end of the disk. A coping saw > blade will probably work okay. Attach an adjustable weight on the reed. > Mount the assembly by suction to the face of one of the instruments on the > panel. > In flight, you will see a deflection of the reed due to normal vibration. > By > experimenting with different RPM's and weight positions on the reed, you > should be able to find a combination where there will be harmonic > resonance, > where the reed will deflect to a much greater extent. Note these settings. > Now paint the outer two or three inches of one blade of the propeller. > Obviously, if the deflections are now greater than before, you painted the > heavier side of the prop. Now work on the other blade until you get > minimum > deflection. > It seems simple, but it works. I used a spray can to paint, and doesn't > take > much paint since there is a long arm and requires little weight to have an > effect. > I don't know if this will work on a metal prop because of the larger mass > > > ________________________________ Message 5 _____________________________________ Time: 05:47:07 PM PST US From: "Bill Schlatterer" Subject: RV-List: New Rattle Can Primer ?? Dupont 4115s Just FYI --> RV-List message posted by: "Bill Schlatterer" Not to start this up but thought it might interest some to see the spec sheet on a new rattle can self-etching primer by Dupont. It is supposedly non-corrosive AND does have some corrosion inhibiting qualities. I tried some this week and it works pretty well. Shot some small parts, air dried about 15 minutes followed by Dupont Immron. Came out slick! YMMV See spec sheet link. http://www.performancecoatings.dupont.com/dpc/en/us/html/prodinfo/chromasyst em/H-19469_A-4115S.pdf Bill S 7a Ark fuse/panel ________________________________ Message 6 _____________________________________ Time: 07:35:27 PM PST US From: "R. Craig Chipley" Subject: RV-List: Terra TPX 720 --> RV-List message posted by: "R. Craig Chipley" Anybody have a manual/wiring diagram for this radio? Needed badly. Thanks, Craig __________________________________ ________________________________ Message 7 _____________________________________ Time: 07:55:39 PM PST US From: "Ed Anderson" Subject: Re: RV-List: Terra TPX 720 --> RV-List message posted by: "Ed Anderson" Hi Craig, I have a Maintenance manual for the TX 760 D but not the TPX720. Don't guess that would help. Ed Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message ----- From: "R. Craig Chipley" Subject: RV-List: Terra TPX 720 > --> RV-List message posted by: "R. Craig Chipley" > > Anybody have a manual/wiring diagram for this radio? > Needed badly. Thanks, Craig > > > __________________________________ > > > ________________________________ Message 8 _____________________________________ Time: 10:51:47 PM PST US From: "Brad Oliver" Subject: RV-List: Hanging Plans --> RV-List message posted by: "Brad Oliver" I seem to remember seeing (on someone's web site) a cool way to hang the plans that allowed the builder to flip pages easily, but I can't find it again. Anybody know what I am talking about, or have another good way to hang them (on wall)? Thanks, Brad RV-7 Emp Kit Arrived Today - Waiting on Tools