12th November 2013

More Firewall

Final location arrangement of the contactor area, holes drilled ready for mounting:


Brake reservoir, holes drilled, ready for mounting:


Fuel Flow sensor, holes drilled, ready for mounting:


Using the rear side of the firewall to locate the GND tabs, fore & aft.


Just no good way to mount them vertically. Guess I can see why most people end up horizontal above the firewall stiffeners.


OK, I decided, get on with it. Here are the chosen locations for the ground tabs, fore & aft sides of firewall, also the central location for the RDAC-XF, and leaving open the option of a single pressure manifold (if needed) for the manifold pressure between the engine and the RDAC. Actually this side of the engine is the side that needs 2 pressure transucers, oil and manifold. It is the other side that needs only 1, fuel pressure.


OK, think I have made the final firewall decisions and can go ahead and drill & cut the final holes. It’s about 3/4 finished right now and this will let me get to 100%. Decided to keep the option for 2 cabin heat ports after checking the hose fit. After all it is Colorado, not Texas. Decided to have the 2 wire/cable feed thrus directly below the upper skin ribs on each side, put the 2 port pressure manifold on the left, single port on the right (viewing from FWF., and mount the RDAC in the center using nutplates for easy removal, replacement. I have a 2″ knockout punch coming for the cabin heat holes. a 1-1/8″ punch on hand for the control cable feed-thrus, and a 3/4″ punch on hand for the cable feed-thru tubes. Whoops! Better place the holes for all control cable feed-thrus.


Hours: 5.5 | Posted in Bulkheads, Foward Fuselage | 0 Comments

12th November 2013

Yesterdays Work

Went ahead and enlarged the ‘stack’ rectangle in the stack bezel, to one large rectangle, cutting out the metal where the V6 & V20 were going to go.



Decided on just the alternator ANL in close proximity to the main copper buss bar, pointed downwards.



Built a mounting angle for the fuel flow sensor. It will bolt through the firewall and through the brake hose bracket behind the firewall.



As for location for the ground tabs, I want to have a location that puts the through bolt just above the battery negative connection BUT below the upper firewall horizontal angle for access. The main wiring plane is going to be the bottoms of the upper forward skin ribs (same level os the upper angle. Placing it below will give access above the rudder pedals but low enough to reach.


Hours: 5.0 | Posted in Bulkheads, Foward Fuselage | 0 Comments