---------------------------------------------------------- Zenith-List Digest Archive --- Total Messages Posted Sun 03/30/03: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:01 AM - Re: 701 fuel tank supports (Ed Kramer) 2. 09:40 AM - Higher Oil Temp Readings (Schallgren@aol.com) 3. 10:07 AM - Re: Higher Oil Temp Readings (Pwalsh4539@aol.com) 4. 10:50 AM - 701 Fuel Tank U channel. (RURUNY@aol.com) 5. 02:02 PM - Re: 701 Fuel Tank U channel. (H. Robert Schoenberger) 6. 02:50 PM - Re: 701 fuel tank supports (Flydog1966@aol.com) 7. 06:43 PM - 701 General questions (Walt Cannon) 8. 08:19 PM - Holes / Access Panel Instrument Panel (Don Honabach) 9. 09:22 PM - Re: Holes / Access Panel Instrument Panel (George Swinford) ________________________________ Message 1 _____________________________________ Time: 07:01:02 AM PST US From: "Ed Kramer" Subject: Re: Zenith-List: 701 fuel tank supports --> Zenith-List message posted by: "Ed Kramer" Robert, I encountered this when I was installing the "U" channels (7V11-4K). I talked to Nick at ZAC and he said to drill out the existing rivets to install the "U" channel, & not to change the location of the U channel or add unnecessary holes in the spar. That's what I did and it worked fine. Ed Kramer West Seneca, NY CH 701, rudder & left wing complete, skinning right wing. edkramer@prodigy.net ----- Original Message ----- From: "H. Robert Schoenberger" Subject: Zenith-List: 701 fuel tank supports > --> Zenith-List message posted by: "H. Robert Schoenberger" > > List . . . On my Edition 4 plans for the 701, wing dwg. 7-V-11, there are several rib channels (vertical U shaped pieces) which attach to the rear ribs No. 1 and 2 and the main spar to laterally hold the fuel tank in place. The U channel that is on the outboard side of rear rib No. 1 and to the rear of the spar as shownin the lower left of dwg. 7-V-11, second plan detail up, is indicated to be at Station 300. The rib itself is attached at Station 280. At station 300, the factory has already riveted the spar root doubler (7V3-2SP) to the spar. There no room to move the rib channel outboard as there is lightening hole immediately adjacent. It would appear that the four middle A5 rivets that the factory installed attaching the doubler to the spar should be temporarily removed so that this U channel can be put in place and then re-rivetted. This doesn't seem right - why would the factory install the rivets in the first place? Have any of you run into this problem or am I! > misreading the plans? I would have written the ZAC, but I figured they were on their way to Sun n Fun and wouldn't be available with an answer for up to two weeks. Thanks for your help. Robert Schoenberger, 701 tail feathers done, working on the right wing. > ________________________________ Message 2 _____________________________________ Time: 09:40:57 AM PST US From: Schallgren@aol.com Subject: Zenith-List: Higher Oil Temp Readings --> Zenith-List message posted by: Schallgren@aol.com List: Bob Harrison wrote: "I've just modified the oil cooling circuit getting more consistently higher oil temps." We had the same problem in that oil temps were running low in the Denver, CO winter. We asked Pete if we could bypass the oil cooler by running the "out" side of the oil filter to the "in" side. He agreed that was a good fix. We did so and oil temps went back to the correct range. The second flight in that configuration was during 60F+ temps so temps ran on the high side and we had to change it back. Now if we can figure out how to change it with valves we won't have to take the cowling off and switch hoses. My question Bob is "How did you modify your oil cooling circuit"? Stan 601HDS/Jabiru3300 ________________________________ Message 3 _____________________________________ Time: 10:07:55 AM PST US From: Pwalsh4539@aol.com Subject: Re: Zenith-List: Higher Oil Temp Readings --> Zenith-List message posted by: Pwalsh4539@aol.com What about some sort of baffle to restrict the airflow across the cooler? ________________________________ Message 4 _____________________________________ Time: 10:50:22 AM PST US From: RURUNY@aol.com Subject: Zenith-List: 701 Fuel Tank U channel. --> Zenith-List message posted by: RURUNY@aol.com Robert, Installing the U channel for my right wing I found the same rivets installed in the spar by Zenith techs. I looked it over carefully and then drilled out the rivets. I back-drilled through those holes into the U channel and then riveted. I have the rudder, elevator, stabilizer done. Working right wing also now. I have all skins drilled and clecoed, wing tip done. Working on root skin cuts, and will open top skin to install tanks, main and aux tank. Left wing will go quick as all parts fabricated for right were fabricated for left. I have lots of pics of construction. If you need to see any of particular assembly I will send them. Brian Unruh, Long Island NY 701 http://www.zenithair.com/bldrlist/profiles/bunruh/ ________________________________ Message 5 _____________________________________ Time: 02:02:51 PM PST US From: "H. Robert Schoenberger" Subject: Re: Zenith-List: 701 Fuel Tank U channel. --> Zenith-List message posted by: "H. Robert Schoenberger" Brian . . . Thanks. I think I'm okay for now. Wow - you wife must really love you to have the stab and elevator in the living room!! Tell her she gets my vote. Robert ----- Original Message ----- From: Subject: Zenith-List: 701 Fuel Tank U channel. > --> Zenith-List message posted by: RURUNY@aol.com > > > Robert, > > Installing the U channel for my right wing I found the same rivets installed > in the spar by Zenith techs. I looked it over carefully and then drilled out > the rivets. I back-drilled > through those holes into the U channel and then riveted. > I have the rudder, elevator, stabilizer done. Working right wing also now. I > have all skins drilled and clecoed, wing tip done. Working on root skin cuts, > and will open top skin to install tanks, main and aux tank. Left wing will go > quick as all parts fabricated for right were fabricated for left. I have lots > of pics of construction. If you need to see any of particular assembly I > will send them. > > Brian Unruh, Long Island NY 701 > http://www.zenithair.com/bldrlist/profiles/bunruh/ > > ________________________________ Message 6 _____________________________________ Time: 02:50:05 PM PST US From: Flydog1966@aol.com Subject: Re: Zenith-List: 701 fuel tank supports --> Zenith-List message posted by: Flydog1966@aol.com my 4th ed. plans, dated 10-01, show 2 "U" channel on each rib, and 1 "L"(7v6-3 actually) on each rib. The "L" is positioned up close to the spar, but is riveted to the rib. Is this difference due to another design change? And I cant help but wonder now if I should do it this way, or try to get the "latest and greatest" revision. Also I hav'nt got to this point yet so maybee I just dont see the problem yet. Anyone care to thow in there 2 cents? ________________________________ Message 7 _____________________________________ Time: 06:43:10 PM PST US From: "Walt Cannon" Subject: Zenith-List: 701 General questions --> Zenith-List message posted by: "Walt Cannon" Greetings all, I have a couple of general questions for you 701/912 and 912S owners: 1) Anyone concerned about not having carb heat? Do this engines need it given that they are picking up warm air from inside the cowl? 2) Is anyone using the Rotax "tuned air box" on the 912S? Does it have provisions for carb heat? 3) What size "amp-hours" and weight battery are you using for a good CG location. Mounted behind the large access panel or way aft in the tailcone like the latest drawings from ZAC show? 4) Has anyone actually installed a 912S with the new "high torque" starter. Did you take the ZAC precautions to insure it cleared the motor mount? Any issues? 5) How about cabin heat? Anyone used the ZAC shroud? Does it work? Anyone accomplish the heating with water and a heat exchanger? 6) I don't really like the idea of those DZUS fasteners on the cowl with the angles supporting the F/G inside. Why wouldn't a big access door on top of the upper cowling work, with some nice stainless screws and nutplates securing the F/G to the skin in front of the firewall? All comments welcomed on or off the list. Thanks, Walt Cannon ________________________________ Message 8 _____________________________________ Time: 08:19:16 PM PST US Subject: Zenith-List: Holes / Access Panel Instrument Panel From: "Don Honabach" --> Zenith-List message posted by: "Don Honabach" Hey Guys, After trying to crawl under the instrument panel today, it's obvious that unless I shrink in a major way, working under the panel in any real way just isn't going to happen. Has any one installed access holes or similiar to provide access to the instrument panel area? Any problems with doing so? Just seems like a shame to have to de-rivet for any minor work or inspection. Thanks, Don Honabach Tempe, AZ - 601HDS ________________________________ Message 9 _____________________________________ Time: 09:22:48 PM PST US From: "George Swinford" Subject: Re: Zenith-List: Holes / Access Panel Instrument Panel --> Zenith-List message posted by: "George Swinford" Don: I have installed an access panel in the upper forward skin. It spans the distance between the left and right fuel tank supports( 6-F-12-5). The aft edge of the cutout is just forward of the instrument bulkhead. The forward edge sort of follows the contour of the front canopy tube. I made the cutout in the forward upper skin, then traced the cutout contour on another piece of aluminum for the access panel. I made a doubler of .040 to surround the cutout and installed 8-32 nutplates to retain the access panel. I couldn't resist gilding the lily, so I made a plenum for the under side of the access panel and cut a couple of slots near the forward edge of the panel for defog air outlets. I got a one inch flange from ACS to let warm air into the plenum. So far I haven't installed the cabin heat system so I can't offer any details of how the defog air gets directed to the plenum. I got the basic idea for the access panel from Jeff Small. He has good pictures of his access panel, which is simpler and lighter than mine. I hope this gives you some useful ideas. George ----- Original Message ----- From: "Don Honabach" Subject: Zenith-List: Holes / Access Panel Instrument Panel > --> Zenith-List message posted by: "Don Honabach" > > Hey Guys, > > After trying to crawl under the instrument panel today, it's obvious > that unless I shrink in a major way, working under the panel in any real > way just isn't going to happen. > > Has any one installed access holes or similiar to provide access to the > instrument panel area? Any problems with doing so? Just seems like a > shame to have to de-rivet for any minor work or inspection. > > Thanks, > Don Honabach > Tempe, AZ - 601HDS > >