That flange on the access cover is It? Maybe 120 pounds of fuel and minus 2 g's or so for design ultimate load. I guess that the shear strength of any one of the four screws exceeds that, but I am amazed that that passes engineering. But kudos to the guy who drew up the gas tank and made it fit for r&r.
Thanks a whole bunch, Ian On Sep 3, 2017 8:40 PM, "Ian Williams" <[email protected]> wrote: > I am currently doing the annual inspection for our little rocket and need > to inspect the tank as per the AD to look for bits of molten resin …. So > will take a pic for you. But the rear restraint is the cover over the > access into the rear fuse …. (where the fuel filter is located as per the > fuel system AD) It is restrained by 4 screws which is the cover and there > is a flange on the bottom of the cover which holds the rear of luggage area > floor in place. Real simple. > > > > Best regards > > > > Ian Williams > > ZK-GCB > > > > *From:* [email protected] [mailto:[email protected]] *On > Behalf Of *Greg Wilson > *Sent:* Monday, 4 September 2017 2:22 p.m. > *To:* [email protected] > *Subject:* Re: RE: Re: [DOG mailing list] Fuel tank removal > > > > Removing the tank is tricky. After removing the angle flanges and the > luggage compartment base: > > > Remove the fuel gauge sender and earth wires > Remove the fuel intake pipe off the tank and fuselage > Lift the rear of the tank until the tank is vertical > Reach over and under to disconnect the fuel hose and fuel drain hose > Rotate the (vertical) tank 90 degrees to the left (I think this is correct > -rear should now be at the left. Once I worked it all out I wrote a diagram > & instructions on the top of my tank in texta.) > Lift and wiggle tank up and top forward to remove it through cockpit > > Good luck, > > Greg. > > > Greg Wilson > > > > > ---- On Mon, 04 Sep 2017 11:17:43 +1000 *Michael Stockhill > <[email protected] <[email protected]>>* wrote ---- > > Thanks all. Whoever installed my tank didn't install any sort of flanges > or other restraining devices at the rear bulkhead to secure the baggage > compartment covers, so their back edges and the tank are floating. If > anyone gets a chance I would appreciate a photo or two so I can fabricate > something. > > > > There are two fiberglass angles creating a flange at the front of the tank > under which the covers fit. These are attached to the back side of the > seat bulkhead with rivnuts and machine screws. Naturally the machine > screws were seized or the rivnuts spun so I spent an hour or two grinding > off the screw heads so I could remove the flanges. I have a hard time > believing that rivnuts are a solution for a structural application. > > > > Looking forward to pulling the tank tomorrow. May be an issue due to some > fiberglass buildup behind the shoulder harness fittings from someone's > indeterminate repair. Currently an interference fit. I hate cleaning up > other people's messes on airplanes. > > > > Thanks for all of your insights. > > > > > > M > > > > On Sep 3, 2017 6:08 PM, "Ian Williams" <[email protected]> wrote: > > The reason I suggested to remove the canopy is that it is real easy to > remove and yes, I did crack the rear window !@#@#$ . > > Best regards > > > > Ian W. > > > > *From:* [email protected] [mailto:[email protected]] > *Sent:* Monday, 4 September 2017 10:44 a.m. > *To:* [email protected]; Mike Collins > *Subject:* Re: Re: [DOG mailing list] Fuel tank removal > > > > I forgot to mention that we have a fibreglass tank that replaced an ally > one and same method worked with both. > > > > > > > > > > > > > > > > On Monday, 4 September 2017, 8:28:14 am AEST, Mike Collins < > [email protected]> wrote: > > > > > > If you have a new aluminium tank it just rests very snugly on (from > memory) five or six fiberglass covered supports that are attached to the > fuselage. > > The passenger luggage panels are what hold the tank in place together with > the fuel filler system - there are no bolts! > > Mike > > > ------------------------------ > > *From:* [email protected] <[email protected]> on behalf > of Michael Stockhill <[email protected]> > *Sent:* 03 September 2017 18:52 > *To:* [email protected] > *Subject:* [DOG mailing list] Fuel tank removal > > > > It looks like I need to pull my Dimona fuel tank to route ADS-B antenna > coax. For the life of me I can't see how the tank is secured to the > airframe. Where are they hiding the bolts etc.? > > > > Thanks > > > > M Stockhill > > Polson MT > > > > >
