737-800 Build in Oslo

[nax228]

Got started with the dual yoke assembly last night, but need to extend the center rod. It turned out 3,5 cm to short, so I have done some bad measuring in the preproject.
That beside, it works and seem good.
Time will show if my idea on single point pulling gas strut works out well. Here you see the assembly on top of the basemodule it will be mounted in.
Holes will be cut today and I'll start with the wiering. Since the midsetion have to be redone, I will get a week or two delay.



Looking forward to fly the sim by yokes instead of a gamepad. I guess I will start spending more time behind "the wheel" than behind the MIP when it's ready, and start doing some real flights. Until now it's only been testflights even I did a flight on VATSIM in april only by autopilot. We can call that a testflight to to keep the books clean.

[JWS]

Looks nice NAX, imagine the things you can do with LEGO hey.

JWS

[Nick1150]

Great job Nax !!!!

Keep us posted man, I am really interested in your dual yoke and J rails projects

Excelent progress !!!!

[nax228]

Here is a few details on the construction of the crossbar:





The gaskets i use for bearings is made from 20mm nylon of some kind. Industrial plastics anyway.
It' very useful for this purpose reading the datasheets, so I hope they will last a long time. Found it in a container (dumpster) outside a company dealing with all sorts of plastic materials. cost 0€.

[JWS]

Here is the plan to get the sideways movement without having the actual J-rails (they are EXPENCIVE)
I will moult my rails on a pair of rails going the other direction and make a J in my MDF base. The J in the MDF will have nylon along the sides.

Cost will be equal to 0$

NAX, very interesting. Please keep us posted.
Few questions.
What exactly is "moult"?
How do you realize the side ways movement (wheels?)? Same question: how will the seat move backwards?
What kind of nylon do you use and where to get it?

Costs 00 seems optimistic.

Regards,

JWS

PS Have you seen the J-rails by Revolution-Simproducts?

[nax228]

Moult should be mount... typo.
Nylon: I got it from the dumpster outside www.vink.com. Dont know exactly what type it is, but sure seems appropriate. Ideally we should use POM.
I found this piece:


We'll see about the sideways movement. I thought of using small ballbearings, but now i'm not sure. The nylon has got really good sliding characteristics... Idea in progress.
Backwards movement is done on the already mounted rails. It's a matter of placing and fixing these rails to something that moves sideways. Another set of rails or maybe nylon?

I have seen the rev-sim rails and a friend have ordered. Will be cool to see them up close, but I think I will be satisfied with a selfproduced solution.

cya

[JWS]

Ideally we should use POM.

POM ??

JWS

[nax228]

Well, you asked

What kind of nylon do you use and ....?

POM. Maybe you prefer Polyoxymethylene? hehe
http://en.wikipedia.org/wiki/Polyoxymethylene_plastic

[JWS]

Oh, the old polyoxymethylene, why didn't you say so in the first place.

JWS

[nax228]

So I have this idea that the force against the yokes could be made by only applying gas struts pulling on the structure from only one direction.
This will also make the trim-action easy to make... Remember that this is the idea

Thought a lot on the physics and have made some drawings. Here is how I want to make the trim assembly.
If the yoke stands in its neutral position, the gas struts and "lip" on the crossbar will stand horizontally from the crossbar. Gas struts attached to the Trim-assembly's' elevator witch is also in mid position. Moving the yokes back and forward will apply force from the gas struts that want to pull the lip back to it's neutral position.
When I use my trim buttons this will activate the engine running the threaded rod, making the elevator that hold the gas struts up or down, thereby adjusting the neutral point for the yokes, and the yoke will move back or forward together with the aircrafts trim indicator.
I will base this on steady trim movement, and will adjust the engines speed by finding the right voltage to operate with to match the aircrafts trimming.

Here is the drawings:

.

.

.
So this is how the neutral position looks like when the elevator is UP and DOWN.

.


After todays dumpserhunt I got all the parts I need to start building the mechanism. I got the rod and bearings at home, but look at my nice findings in the dumpster at the wheelchairdealer:


That engine is precisely what I was looking for, but this one runs 24V. I hope 12V gives enough revs to make it work. If not I have to go to the scrapyard for cars and buy an old motor for windowvipers. Exactly the same construction, but run on 12V AND I have to pay 20-30€ for it... This one was for free and thats how i like it.

Just stopped by another dumpster an found my second treasure for the day, 2 spare computers, exactly the same as I use in my setup. I burned one computer before xmas, but had one for spare... now I have two for spare.


Hope to have the construction done by the weekend, but thats maybe to much to hope for. Anyway I have to make it before the yokes goes in.

Have a nice weekend!!

PS: If anyone recognize the motor, I found it on Sketchup warehouse, made by someone that would use it in his C172 cockpitbuild Now I have used it in a cockpitbuild as well. Thanks mate!!