Brake and Fuel System
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| I installed the boost pump just forward of the gasolator. I was going to mount it on top of the heal plate. But decided it would be better lower and on more solid structure. It will be quieter here. I think the hat section would act like a sounding board. | |
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| Got the Rudder pedals, brakes, motor mounts, and nose wheel support dry fit. Just have the bolts finger tight. I have been looking on how to run the brake lines. I think I will have them run along the lower longerons. | |
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| Here you can see the pushrods through the seals also | |
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| The brake lines presented a challenge. I contemplated using solid lines. But I am concerned about the constant flexing of the gear. I definitely need flex here, but could run solid all the way to the brakes. The good thing is that it won't be hurt by heat from the brakes. The bad thing is work hardening. I decided to go with nylaflow tube all the way. ZAC has the lines going through the cabin then out the wing root. I decided to have them penetrate here and then follow the angle underneath. | |
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| I am using 2 elbows to go through the skin then make a turn. I have a grommet on the flange of the fitting to keep it in place. | |
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This may not look like much but this took quite a while to get it right. The goal is to keep a pressure head on the fuel. The plans call for having valve up about 8 inches higher on the center console. I bought the u joint and an extender from Andale to move it down as close to the cabin floor as possible. The 3/8 AN fittings (blue) worked great. I barrowed a friends tube flare tool and went to town on the rear attach. I intended to do the same on the connection from the Gasolator to the pump. But there just isn't enough distance between the two to use the flare tool. So for this connection I had to come up with something different. I used the brass nipples that came with the kit and found a 90 degree fitting (must have taken a half dozen trips to hardware stores to find the right one) that allowed the two to line up. I will then use the flex tube between the two. The other option was to move the pump. I decided to go with this. |
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| I used the center console with the kit to dry fit the angles for the extender and check clearance on the torque tube. I am going to put my fuel gages on the console so I need to make it a little wider. | |
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| Here is another view of the set up | |
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| Here is the bracket I made to hold the valve. | |
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| Here is a look at the new slightly wider center console. | |
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| You can see the routing forward and the filter. | |
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I got this filter from Wicks. It is supposed to be a high
performance one that allows
15 gpm fuel flow with no pressure drop and a 10 micron element.
Again I want to try to keep the pressure drop low. I spent a lot of time trying to figure where to install the filter. Some have it on the other side of the fire wall. But I am concerned about heat. So I put it on this side of the firewall. I also want to have access to clean the unit. This presents another problem. When I clean it will get some fuel in the cabin. I am planning on putting a drain hole underneath it. Looking at the Jabiru the fuel pump is on the right side. So this ought to be close to where it needs to go. The Jabiru has a firewall fitting. So I will have to wait for the engine to make the penetration of the firewall. |
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| I wasn't happy with the center console so I decided to rework it. This is just a little smaller and worked better. I decided to go ahead and mount the fuel gages. What the heck. | |
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| Here you can see the routing to the wings and the back of the center console. | |
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| Another view | |
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I finished the routing of the brake lines. Then I tightened all of
the Bolts and pulled the rest of the rivets. I also cut some holes
for the P clamps that will hold the brake lines under the floor. I
will wait to mount that till after I paint.
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| I decided to move the filter outboard a little. It was hard to get out with the nose wheel push rod. I have a hole there now. But this will actually be good. When I service the fuel filter I will need a place for spilled fuel to drain. Been trying to make sure I have everything finished before I rivet the sides. | |
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| I was also worried about the proximity of the fuel line to the fasteners in the bearing. Here you can see how I bent it to avoid. Looks good. | |
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