The Wiring .

Construction overview.

To suit the “The most for the least” attitude, and the “cheap and easy” motto ,,, here are the wiring diagrams that I used …

One is shown the setup with no yaw,, the other with yaw ,, and another with a seatbelt tightener.

Its pretty much self explanatory and it’s so simple anyone could build it.

The actual wiring and setup.

A couple of things need to be remembered ….

The motors …. need to have their windings insulated from earth (the body of the wiper) ,,, Most Jap wipers are like that ,, but check ,, get the wiper motor and test with a meter for continuity between the windings and the body ,, if there is any connection what so ever ,, then its no good or modify it.

The power supplies …. ALL THE NEGATIVES OF THE POWER SUPPYS NEED TO BE BONDED TO EARTH. !!!!!

Trust me on this one after first hand experience in blowing up some mosfets !!!!! (Red face here, I had an unconventional power supply !!!! )

The pots …. The cables going out to the position sensing pots need to be screened to avoid any “noise” from the spikes off the motor wiring. Not absolutely sure on this, but this is what I done.

I was going to use 100K pots but I had 50K pots on hand, so used them instead.

Another thing with the pots ,,, physically, when the platform is sitting roughly level, then the pots need to be roughly in the middle of their travel and have it set up so that ALL the travel is used when going from one extreme to the other.

The micro-switch’s and diodes for extreme limit stopping …. These need to be rated at more than the current that the motor will draw under heavy load. Depends on your setup if these are a “must fit” or not. As for the way they are drawn in my circuit diagram ,,, there is a 50-50 chance you may have to turn them around the other way to suit what you have built. (Depends on which way the motor runs)

Other notes …

ALWAYS fit a fuse on the output of all the power supplies.

ALWAYS bond the negatives from all the power supply’s to earth.

The 500 milliamps fuse is to protect the 5 volt rail in the KT5198 should a fault happen in the pot wiring.

The diode in the same 5 volt lead is there to knock back the voltage a bit. (Mine was a bit high)

Note the position of the jumpers and dip switches BEFORE you power them up.

Always use wires to suit the current drawn by the load.

Notes on the 18 volt DC supply….

The power supply I used was just a heavy duty transformer with a bridge rectifier across the output… and then heaps of capacitors across that. (See the setup in my FS9 page on power supplies)

This unit under no load shows about 23 volts but because it has no regulation ,, under load it drops to about 17 volts.

Probably a good replacement would be to get a 12 volt and a 6 volt battery and hook them up in series to get 18 volts.

As for current ,,, If BOTH the pitch motor and the roll motor were under heavy load ,,, the total draw is about 14 amps. (7 amps each)

After 3 hours of “turbulent” flying there is no more heat on the motors than if they were in use, doing their thing, in a car on a rainy night,,, In fact they were probably cooler. … But, it depends on your setup and the load the motors will be under in normal flying.

I use PWM setting 1 (10 Khz) .. the default of the KT5198 and it is also the only setting on the earlier boards.

Circuit diagram for Pitch and Roll …. (Nose up & down ,,,, and lean left & right)

Simple isn’t it ????? Any less and there would be nothing there !!!!

You can download the above picture here … http://www.jimspage.co.nz/link2fs_basic.zip

And if you want to include Yaw…. (Turn around, left or right))

Yaw, in simple simulator terms relates to generally a bump to the left or a bump to the right … basically this form of yaw adds to the physical sensation of simulated flying .. however I have gone a bit further than this and exploring the total disorientation of the pilot within a simulated environment by basically “playing” with his middle ear.

My simulator can go around and around and around ,,, so when a plane turns (say) right, then my sim will bump to the right (remember you only feel the start of the bump) and may carry on turning to the right for a variable period while in the air ,,, sounds way out stuff, but it isn’t !!!!

The fact of the matter is, this is a simulator so everything you can do to stop the pilot thinking he is in a moving machine, the better ,,, and if you can totally disorientate him enough then he would accept all the cues that are being provided by the motion and by FS on the screen along with the sound ,,, At that point, he has “clicked over” …. Believe me !!! It is a neat sensation. !!! Even with me building the thing and knowing what is going on ,,, I love it ,, well worth the effort.

There is no need for this rotation to be fast ,, it takes my setup 100 seconds to do a complete 360 degree rotation ,, remember you only feel the START of the rotation ,,, after you are going, you don’t feel a thing as far as acceleration goes ,, just an “odd” feeling that you are moving.

Be aware ,, I think some people would get “motion” sickness in this sort of setup.

Note :: All the above only pertains to a fully enclosed cockpit. ,,, It would have very little effect (in fact, probably a negative effect) in an “open” style cockpit.

Heave ,, In my setup, there is no heave as such ,,, As my pitch motor is basically directly under the pilots bum, then a sharp short pulse (up or down or both) can give the pilot the bump on landing or during turbulence or whatever. There is no “G” effect with this but to get true “G” effects is another mission in itself.

Enough on my theory … back to basics….

The following circuit suits a yaw setup that has continuous rotation capabilities.

If you want yaw, but just a bump to the right and bump to the left, then put limiting micro-switches in the wires that come out of O1 and O2.

The diodes across the relays are there to knock off any spikes from the relay coil, so make sure you fit them to protect the K8055, and also, make sure the relays coil current is within the ratings for the output of the K8055.

Circuit same circuit diagram with yaw included ….

You can down load the above (with yaw) diagram here www.jimspage.co.nz/link2fswithyaw.zip

And to add a Seatbelt Tightener……

Adding a seatbelt tightener is a must for people into high performance aircraft (fighter jets, aerobatics etc) what it does is tighten the belts during high G forces and also on the ground when the brakes are on, or reversers are engaged. (This is in addition to the cockpit leaning forward !!)

In my software both of these different trigger factors are adjustable by the user. (You would probably need different settings for different planes.)

The way of actually building this mechanically is up to the user but a “cheapie” setup would have a motor hooked to the seatbelt via a spring(s) and when the motor is triggered, it turns until the seatbelt is tight and the spring is extended ,,,, then it finally turns off via the “ON” microswitch.

When there is no signal for seatbelt tightening, the motor goes backwards (loosening the belts) until it hits the “OFF” microswitch.

The car light bulb is there to limit the load and may not be necessary.

The diodes across the limiting microswitchs may need to be turned around the other way. (To suit the direction of the rotation of the motor)

I’m not actually building this ,,, but it was one of Erich’s “Must haves” and it is also his design, so I have included it here, also as I seem to be the only one “into” yaw ,,, then a natural next step for other people would be a belt tightener. ,,, In this case the following diagram is the total of what you need to build. (Pitch, Roll and Belt tightener)

You can download the above picture here …. www.jimspage.co.nz/link2fswithbelt.zip

There will be more additions as time goes on ,,, we have heaps of inputs and outputs via the Velleman card to use.

Happy building !!

Dated 22-11-07