Home made yoke

[muffyman]

Here ya go ian

John

Hi John

Thanks heaps for help, I will pop down to my local electronics outlet over the next day or so and see if they one in stock thanks so much again for your help

Cheers Ian

[muffyman]

Hi John

Thanks heaps for help I will pop down to my local electronics outlet over the next day or so and see if they one in stock thanks so much again for your help

Cheers Ian

[Zlatko]

Hello John and Ian, the switch you are aiming for , looks like this :

I've already seen people, who implement it in real experimental aircraft for the same purpose - to change poles and drive DC trim motor in two opposite directions.
PS: For some strange reason a caught myself thinking about car windows. I really don't know , why is that.

[davemuir]

Hi ian
Greetings from Scotland 😃
how's it going down in sunny Australia ?
I'm not on Skype any more mate -
but I'll give you my new email address.

did you see the yoke kit that john made ?brilliant job eh
how's your sim coming on ?
cheers
dave

[John_B]

Hi Zlatco...
I hear you re car windows except they use (mostly) SPDT and a pair of relays as they are quite power hungry.

For my Yokes I will be looking for paddle switches so I have the little ....paddle??? sticking up from the switch.(seen them on Alibaba but they will have to wait until I start my build properly)..

Hey Dave Nice to see ya....thanks for the accolade

John

[muffyman]

Hello John and Ian, the switch you are aiming for , looks like this :

I've already seen people, who implement it in real experimental aircraft for the same purpose - to change poles and drive DC trim motor in two opposite directions.
PS: For some strange reason a caught myself thinking about car windows. I really don't know , why is that.

Hi Zlatko
Thank you so much for the photo that's help make things really clear cheers Ian

[muffyman]

Hi Dave great to hear from you mate its been along time I'm getting close to completing my sim I have just started making single
yoke control systems and
dual 737 yoke systems lots of hard work could you send me your email and we can have a chat cheers Ian

[Biggles2010]

It's fairly easy to make a realistic trim switch from a suitable double throw centre sprung rocker switch. I used a double pole version made by SCI, product number R13-2401, sold in the UK by Rapid for about £1-50.


The rocker part can be carefully removed by pressing the retaining pipper on each side and pushing it upwards. Best to hold the switch body in a vice so you are less likely to disturb the contacts inside the switch body. Watch the centring springs don't get lost when removing the rocker. Remove them while working on it and refit before reassembly.

The retaining pippers can be seen more easily on this picture.




With the rocker removed it's quite easy to add a shaped piece of wood to the top, retained with epoxy. I backed this up with a couple of very small screws from the underside of the plastic rocker, into the wood. The shape of the wood only needs to be approximate, then finish with car body filler and sand to exact shape. I cut a slot in the centre of the new false top to simulate the twin switches used in the Embraer. Spray with black paint, check the contacts are correctly positioned inside the switch body, refit the centring springs and carefully push the modified rocker back into the switch body. Don't forget to check for correct mechanical and electrical functioning at this stage, it's so much easier than finding out later.

I think the effect is quite realistic.



It's been in use for a couple of years and functions very well.

[Zlatko]

Just to mention - with all those switches changing poles, there is some extra care needed with wiring . If they are installed on both yokes and pressed simultaneously in opposite directions, theoretically it is possible to shorten circuits.
And it's true - many options available out there as shape and size , with paddles too , without paddles , etc, etc.
At certain point i stopped trying to achieve 1:1 visual representation and stick with proper positioning and right way to function for each stuff.

[John_B]

Hi Zlatko

Its true that if both press it would short but extremely unlikely that the FO may wish to trim down while the capt is trimming up LOL or vise versa !

Both the captain and FO should never be "flying" the plane together... imagine the chaos.. ..
But as you have brought it to my attention I think a little micro giving only first pressed switch priority might be in order...BUT then if our dozy FO is first and has chosen the wrong way ...........the scenarios are endless

John