The seat and the controls
Installed the 4 gusset plates for the cross tubes today that are going to support the floor boards and maybe the rudder controls.
I have not fixed the cross tubes yet. I am going to wait with that until I know how I am going to do the rudder controls. Two pedals or the rudder control bar…..
No photos today, but I did 5 gusset plates of the 6 that are going to hold the seat and 2 cross tubes.
Made the last gusset plate that’s holding the seat tonight. Soon I will start riveting bits together and add a few photos here !
Change of plans. I need to “wicker” the seat first and then build it into the plane. The gusset plates that are going to hold it are made so I can’t get the seat out or in, once those plates are riveted to the bottom longerons. So I have to finish the seat completely before it goes in.
So while I am looking for someone to do that seat, or maybe I might do it myself, I am working on the rudder controls.
What I am going to do is the following:
I am constructing a walking bar of Chromoly behind the seat, with two cables going to the back to control the rudder. And from the walking bar I have two cables going forward going to two pedals. This way I can put a lot of pressure on both pedals without damaging anything. Working on the bar construction first.
The problem is that that bar can’t be at the bottom as it will be in the way for the aileron control. So I have a cunning plan to mount it halfway up to the diagonal cross tube just behind the seat and just behind the back carry through, if that makes sense. In fact I will have two diagonal cross tubes, one going top left to bottom right and the other one top right to bottom left. And at the junction, I am making a little welded aluminium construction that is going to hold the walking bar.
Will show you some photos soon.
Added a gusset plate to mount the second diagonal cross tube behind the back carry through to carry the load of the walking bar that I mentioned above.
Just spoke with Robert about this and he normally has cables going from the pedals straight to the rudder, without anything in between. This means that if a lot of pressure is applied to both pedals, that goes straight to the rudder control horn. Not sure if I like this. Hmmmm will have a bit of a think about this. Still think I will go ahead and have the walking bar behind the seat.
Here is the walking bar, ready to be welded together. The square tube is Chromoly, 1″ sq. On the left you see one of the 2 inserts I made to attach the cables to.
The 2 holes you see in the sq tube are there for creating extra welding “spot” to make sure the insert never gets out again! The bar is going to pivot around the tube you see in the middle of the bar.
Next thing I will be making is the “thing” that is going to hold the bar in place behind the seat.
Here are 2 bits that need to be welded first for the “thing” that will be positioned on the two diagonal cross tubes just behind the back carry through. One bit is open so it fits over the first existing diagonal. The second diagonal slides through the second bit.
Once its welded, I need to make two more bits to support the walking bar.
Here is the whole bracket welded together.
The two bits on the top are going to support the walking bar. So next I need to drill a hole through the 4 walls !
Done it ! Next job, the pedals…. But before that some cross tubes.
Finally riveted the 2 cross tubes and the one diagonal cross tub that I mentioned on Sat 16 Mar. So with the floor boards sitting on the two cross tubes, I can start thinking about the 2 pedals and how they are going to be mounted there on those 2 floor boards.
The beginning of the rudder pedals. Tubes for one done, next one soon !
This frame of 5/8″ tube will be covered on both sides with 2021T3 aluminium sheet.
It will have a hinge at the bottom of the pedal (is left on the photo). The cables will be connected on the AN4 bolt. The extra bit of short piece tube supporting the bolt will give it extra strength.
Got a piano hinge today and cut two 5.5″ bits (the width of the pedal) for the two hinges for the pedals. That all looks good. Also I started cutting and shaping aluminium sheet to go on both sides of the pedal frame. So yes starting to look like a real one 🙂
Also I have changed the tubing a bit. The short bit supporting the bolt is now gone, and replaced by a longer one going all the way to the top of the pedal, and positioned in the center. The bolt is a bit longer as well. Will show you soon !
Have been riveting the firewall in place tonight, and attaching the curved top on the front, before I continue with the pedals. Suddenly it starts to look more complete. Will take picture tomorrow night. The fuselage is upside down at the moment.
Here it is. Front completely finished, except for the top.
Almost done with the rudder control pedals, next will be fixing them to the floor boards.
What you see here is the back, with an access hole to the nut, just in case……
The two tangs shown on the side are used for:
1 Connect the cable going backwards to the walking bar and then to the rudder,
2 Attach a spring to pull the pedal slightly forward, to stop if from “falling” backwards.
Below are the pedals in position and fixed to the floor boards. Have used some string for now to see how they work with the walking bar. Feels good I think ! 🙂
Worked this weekend on the control stick. The torque tube still needs to be cut to the right length.
The two elevator control cables will be fixed to the two bolts shown in the left photo, one below and one above the pivot point of the control stick. The back of the torque tube still needs the bell crank that is going to move the ailerons, but I will add that when the wings with the ailerons are done. So that’s still a little while away.
Next is going to be the LANDING GEAR. Wow making progress I think.
I am not adding the back part of the fuselage yet, because I want to do as much as possible in the garage which is not long enough for the whole fuselage, so that will have to wait till I move into the shed just 50m away from the house 🙂
The piece of 2″ tube going to the left (forward) of the control stick is now cut of, to give me a “clear view down” !!!
There won’t be a floor so, can keep an eye on what’s below me 🙂