RE: Redesign and reconstruction of the Oldest Taurus on Earth
Gents ,
Design considerations
In the early days 2,4 V for each direction of movement was used for the reeds but also first proportional servos;
Automatic reducing the speed and torque of every “door” movement.
So the generated forces in the linking of the controls also were automatic reduced.
Also the 45 K & B 0.45 didn’t pump much energy in the plane, the Oldest Taurus on Earth.
Prove?
Three threated hangings each aileron did the job of the Oldest Taurus on Earth, look at the crate picture.
But what happened after that?
One of the first modifications were the switched bridges for the electromotor of the servo so 4,8 Volt (around 1970?). So 2 wires to the battery and no differences anymore in unloading of the cells. Nearly 2 times the torque and 4 times the power, some extra losses by the semiconductors.
Next and not long ago the 6 Volt is used, so again 20 % more torque and 56 % more power available.
It is theoretical but the factor can be 6 times more power to the “doors”
Now we have new, high speed and high torque servos .
Of course there are pilots and planes that uses these power, but what about the Wester Taurus.
Look what’s happening with a high speed high torque “up” action of the elevator!
Picture 1 fig. 1.1 a snapshot of the twisting of the wing of the Oldest Taurus on Earth
In these picture we can see what is happening when the axle of flexibility is behind the point the lift forces affect. An old wing construction without a D tube.
Because this can happen in a glitch of the radiocontrol for safety I use the D tube.
It is not difficult to see that this can be the first movement of the wing followed by “flutter” in high speed conditions, because the angle of attack increases which enlarges the lift forces again.
Picture 2 fig.1.2 a snapshot of the twisting of the wing of the Wester Taurus with a D tube in the future.
The axle of flexibility in front of the lift force.
This is for me the second reason to use the D tube I did tell you before, we see the angle of attack decreases which reduces the forces.
This isn’t new, that’s why I also show a project of me, the Fokker D VIII, many crashes caused by the same problem during the introduction of the real plane in the first world war in 1918 by using the wrong dimensions of the two spars (front and aft) in the wing, and bad construction, so also a axle of flexibility behind the lift forces in certain flight conditions.
Also in this scale model 1 : 4 I will use for safety reasons the D tube.
So let us learn from the past and use a D tube in the Wester Taurus.
BTW this is all the way I think about this and explain on the most simple way, of course others will have another opinion I think.
Cees