Zenith601-List Digest Archive

Wed 06/02/10


Total Messages Posted: 9



Today's Message Index:
----------------------
 
     1. 10:50 AM - Re: Upgrade Question - Main Spar Carry Through (dgardea(at)gmail.com)
     2. 12:17 PM - Re: Upgrade Question - Main Spar Carry Through (DaveG601XL)
     3. 01:00 PM - Re: Upgrade Question - Main Spar Carry Through (dgardea(at)gmail.com)
     4. 03:50 PM - Fuel line size (dalemed)
     5. 06:03 PM - Re: Fuel line size (Tim Juhl)
     6. 10:04 PM - Re: Re: Upgrade Question - Main Spar Carry Through (Terry Phillips)
     7. 10:24 PM - Re: Fuel line size (Terry Phillips)
     8. 10:38 PM - Re: Fuel line size (Bryan Martin)
     9. 11:11 PM - Re: Upgrade Question - Main Spar Carry Through (Scotsman)
 
 
 


Message 1


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    Time: 10:50:44 AM PST US
    Subject: Re: Upgrade Question - Main Spar Carry Through
    From: "dgardea(at)gmail.com" <dgardea@gmail.com>
    Bruce - thanks for making the call to ZAC in the rivet holes thru that forward bottom doubler on the center spar. I unfortunately already backdrilled these so will need to add additional rivet holes to miss the holes in the fuse floor. On a related topic .. did anyone notice that the center spar doublers were shipped at length 945 when the ZAC upgrade plans call for a length of 940 on all the doublers. I just finished drilling and deburring all the doublers and wondering if I will need to trim these to avoid interference with the front and aft uprights? Someone who has already clecoed their center spar parts together and tested for clearance may already know the answer. Thanks! Dave Gardea -------- Dave Gardea 601XL - Corvair working on wiring panel and upgrade kit http://home.comcast.net/~davegardea/ Read this topic online here: http://forums.matronics.com/viewtopic.php?p=299754#299754


    Message 2


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    Time: 12:17:11 PM PST US
    Subject: Re: Upgrade Question - Main Spar Carry Through
    From: "DaveG601XL" <david.m.gallagher@ge.com>
    Dave, There will be trimming required of the doublers to provide clearance to the wing uprights 6ZU2-6. Good luck, -------- David Gallagher 601 XL/Jabiru 3300 First flight 7/24/08 Upgraded 3/19/10 130+ hours and climbing! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=299761#299761


    Message 3


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    Time: 01:00:59 PM PST US
    Subject: Re: Upgrade Question - Main Spar Carry Through
    From: "dgardea(at)gmail.com" <dgardea@gmail.com>
    Dave, Thanks for the heads up on this. Like James, I will be trial fitting the center spar in the fuse and checking the fit before any riveting. Thanks, Dave Gardea -------- Dave Gardea 601XL - Corvair working on wiring panel and upgrade kit http://home.comcast.net/~davegardea/ Read this topic online here: http://forums.matronics.com/viewtopic.php?p=299770#299770


    Message 4


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    Time: 03:50:09 PM PST US
    Subject: Fuel line size
    From: "dalemed" <dalemed@gmail.com>
    I've decided to replace the rubber hose fuel line from the tank with 3/8" aluminum line. I've got 2 questions - should I use 6061-T6 Aluminum line and what wall thickness should I use? Aircraft Spruce sells 4 different wall thicknesses for 3/8" OD line - .035, .058, .065 and .083. It seems to me any of these should give me adequate fuel flow for a Jabiru 3300. The other issue might be strength, but I should be able to support it well enough. Thanks for any advice. -------- Dale Flying Cessna 170B Building Zenith CH650 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=299792#299792


    Message 5


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    Time: 06:03:16 PM PST US
    Subject: Re: Fuel line size
    From: "Tim Juhl" <juhl@avci.net>
    I'm not flying yet but I chose to go with 3/8 " 3003-0 versatube which has a wall thickness of 0.035 and a working pressure of 520 psi. The versatube is fairly easy to make bends and curves in without kinking. I plan to use aeroquip hoses at points subject to flex or excessive vibration. Tim -------- ______________ CFII Champ L16A flying Zodiac XL - Jabiru 3300A Tearing wings apart for modification Read this topic online here: http://forums.matronics.com/viewtopic.php?p=299805#299805


    Message 6


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    Time: 10:04:41 PM PST US
    From: Terry Phillips <ttp44@rkymtn.net>
    Subject: Re: Upgrade Question - Main Spar Carry Through
    Hi James I am far from taking my center spar apart, but I have been thinking about that alignment problem for a while. It seems to me that the best thing would be to actually bolt both wing spars to the two sides of the center spar before riveting the two sides together. That may be overkill, however. At a minimum, I think I'd want to put all 12 bolts in place on the center spar, with appropriate spacers between the top and bottom middle bolts, before I drilled the new doubler that will tie the tops of the center spar together. They must line up, and the holes must be tight. Since the holes are already drilled, they holes must be aligned before the two sides of the spar are drilled and riveted together. However, I haven't even looked at the instructions for upgrading the center spar, and it may be covered there. Let us know how you resolve this. Terry At 09:47 PM 6/1/2010 -0700, you wrote: >Thanks wa7dvd. That seems to be a solution as I think that the upgrade >manual suggests drilling through the existing holes in the forward flange >of the spar which will clip the old cabin floor holes. I note that in one >of the upgrade videos you can see that their clecos are squint because of >this. Is there sufficient edge distance between the old and new holes in >your method? > >Anyone else got a solution for the bolt hole alignment on the upgraded spar? > >James Terry Phillips ttp44~at~rkymtn.net Corvallis MT ZU-601XL/Jab 3300 s .. l .. o .. o .. w build kit - Tail & flaps are done; Upgrading wings & ailerons per the AMD Safety Directive http://www.mykitlog.com/N47TP/


    Message 7


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    Time: 10:24:06 PM PST US
    From: Terry Phillips <ttp44@rkymtn.net>
    Subject: Re: Fuel line size
    Hi Dale I made the same decision. I recommend that you check out Tony Bingellis' article, "About Aircraft Plumbing," in his book Firewall Forward. You might be able to find the article for free on the EAA website. A lot of his articles are published there for members. Bngellis recommended 5052-1. 6061 is stiffer. The article has a lot of info about fittings, design, etc. It is a good primer. Terry At 03:49 PM 6/2/2010 -0700, Dale wrote: >I've decided to replace the rubber hose fuel line from the tank with 3/8" >aluminum line. I've got 2 questions - should I use 6061-T6 Aluminum line >and what wall thickness should I use? Aircraft Spruce sells 4 different >wall thicknesses for 3/8" OD line - .035, .058, .065 and .083. > >It seems to me any of these should give me adequate fuel flow for a Jabiru >3300. The other issue might be strength, but I should be able to support >it well enough. > >Thanks for any advice. Terry Phillips ttp44~at~rkymtn.net Corvallis MT ZU-601XL/Jab 3300 s .. l .. o .. o .. w build kit - Tail & flaps are done; Upgrading wings & ailerons per the AMD Safety Directive http://www.mykitlog.com/N47TP/


    Message 8


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    Time: 10:38:06 PM PST US
    From: Bryan Martin <bryanmmartin@comcast.net>
    Subject: Re: Fuel line size
    I used 3003-0 versatube for my fuel lines. It's very easy to work with and bend to shape. It's also a lot cheaper to ship as it is formed into a coil and shipped in a relatively small package. 6061 tubing is more for structural purposes, it's much stiffer and harder to shape. On Jun 2, 2010, at 6:49 PM, dalemed wrote: > > I've decided to replace the rubber hose fuel line from the tank with 3/8" aluminum line. I've got 2 questions - should I use 6061-T6 Aluminum line and what wall thickness should I use? Aircraft Spruce sells 4 different wall thicknesses for 3/8" OD line - .035, .058, .065 and .083. > > It seems to me any of these should give me adequate fuel flow for a Jabiru 3300. The other issue might be strength, but I should be able to support it well enough. > -- Bryan Martin N61BM, CH 601 XL, RAM Subaru, Stratus redrive. do not archive.


    Message 9


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    Time: 11:11:05 PM PST US
    Subject: Re: Upgrade Question - Main Spar Carry Through
    From: "Scotsman" <james.roberts@computershare.co.za>
    Hi Terry, Good to hear from you again. The problem is that even without the actual wing spars in place I can see that the alignment is very slightly off on the outside bolt holes only. If I turn a wing spar bolt it twists into place (probably exerting some pressure on the thread but if i use a 5/16 transfer punch (ie. an object with straight sides it will not fit easily as it clips (very slightly) the edge of the web on the far side's bolt hole). Oddly, the other in board bolt holes seem to be, in general, well aligned. I note that the bolt holes were drilled by Zenith (ie. this was a kit not plans built) and the only modification I have made is in accordance with the upgrades to the carry through spar. I am very reluctant to ream the holes any further as on each web individually I have a nice fit (very) fit...especially after all the incidents and conversations on the forum. Any help would be appreciated. Has anyone had this problem? James -------- Cell +27 83 675 0815 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=299822#299822




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