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Lear45 Switch & Component Guides

(Original thread started on 08-02-09 by Ron Rollo)

This thread is dedicated to documenting all of the switches, rotaries, toggles, encoders and other manual switch components found in the Lear45 flightdeck. The information that you find here is correct to the best of our knowledge. If you find something that is out of date, please bring it to our attention.

 

To get started, here is a guide to help find and populate your Lear45 simulator with the most realistic toggle switches for our builds. Unfortunately the prices are a bit steep, but they are the real "TL" Series toggles!

 

I have spent many hours and nearly $100 finishing up the research on this subject. A few days ago, I received my order of four test switches and have them mounted in various panels in my Center Pedestal seen below:

Ron 1094

 

I have a standard "TL" Series switch where the Engine Sync would be and a standard "NT" Series switch in on the ELT panel. As you can see, at first glance there is no deference between the two. It is not until you get super close up on them that you can start to tell the deference between the two. However, if you do choose to use the "NT" Series switches and do not have any of the "TL" series around for reference, then the "NT's" become the real thing!  Enjoy the information and research below!

 

The Search: Trying to find the right toggle switches for the L45 simulator build has been more than challenging. At first glance in the Lear45 cockpit, the toggles are one of the most recognizable items that you would think should be easily found at a Radio Shack for example. But this is far from the truth of the matter. After at least two years of “OFF and ON” searching, I now feel fairly comfortable with the information that I am releasing.

 

The Switch: There are a total of seventeen Honeywell “TL” Series toggle switches in the Bombardier Learjet, Model 45 flight deck. Six of these toggles are “LOCKING” switches in various configurations. The other eleven are “STANDARD” switches; however, they are special because they have a red protective boot around the toggle for accidental splash protection. The “TL” Series also has stepped leads to further prevent accidental shorting between the terminals.

 

The Problem: As we know, each and every system in this aircraft has at least one redundancy system, meaning that the toggles are either double pole or four pole. If we were to use authentic aircraft parts, the cost of just these 17 Honeywell toggles would reach nearly $1,000 for the set! The challenge for the Lear45 simulator builder is to find a cost effective solution and maintain the authentic look of the switches.

 

The solution: The toggle switches listed below are from the same Honeywell “TL” Series that populates the Lear45 cockpit. All of the listed switches look and operate like the real part; however, in most if not all cases, the listed switches have been simplified in an attempt to reduce cost and complexity. Only one pole is required in all of the listed switches. If, however, you choose to create outside lighting on you simulator, for example the “NAV Lights”, these would require a double pole switch and some hardware logic. In this example you would order 2TL1-1 rather than 1TL1-1. One pole would be used for the computer simulation and the second pole would be used for the hardware logic to operate your outside lights.

 

The source: The best and cheapest source for these switches that I have found, (so far) is http://www.onlinecomponents.com I have found that their website is easy to navigate and the search function is second to none. Their prices are more than fair and the availability is posted on each and every part. They say the factory lead time is six weeks for parts out of stock but in reality, it is much less in most cases. Feel free to look for other sources for these and other must have switches, but if all else fails, you’re covered.

 

I used http://www.mouser,com to double check most of the research on these switches. Mouser has an easy to use data sheet and spec sheet to verify switch positions and functions.

 

LOCKING TYPE “TL” SERIES TOGGLE SWITCHES:

Function Honeywell                       # Poles           Circuitry                    Cost

__________________________________________________________________

LANDING GEAR 1TL1-2D                 1                  OFF-ON                  $31.65

L ENG COMPTR 1TL1-1A                 1               ON-OFF-ON               $32.46

R ENG COMPTR 1TL1-1A                1                ON-OFF-ON              $32.46

PITCH TRIM PRI/SEC 4TL1-1A         4                ON-OFF-ON              $68.96

EMER LIGHTS 1TL1-1M                   1                ON-OFF-ON              $27.82

PIT TRIM BIAS 1TL1-7E                   1               (ON)-OFF-(ON)           $32.50

A/C COOL HEAT 1TL1-1A                1                 ON-OFF-ON              $32.46

 

NOTE: There are other less expensive alternatives to these “TL” series switches. If you want to save a few bucks and are not overly concerned about the exact authentic function of the switch, there are some others in this same family that are less expensive. The cool thing is that they still look like the real part!

 

Use 1TL1-E to substitute for: 1TL1-1A and 1TL1-7E ($19.53 each)

 

This is an ON-OFF-ON switch that ONLY locks in the center position. When you pull it out of the center position to move to one of the other two positions, it does not lock, meaning it could accidentally be hit and knocked back into the center locking position. This may be a great alternative to any switches that you do not plan to model in the simulation and only plan to keep as dummies.

 

Use 1NT1-3D to substitute for: 1TL1-2D ($24.75 each)

 

This is an ON-ON “NT” Series switch that looks as close as your going to find to the “TL” Series switch. This switch has an extra terminal where the OFF would be.

 

STANDARD TYPE “TL” SERIES TOGGLE SWITCHES:

Function Honeywell                       # Poles            Circuitry                   Cost

_________________________________________________________________

L RUDDER PEDAL 1TL1-7               1             (ON)-OFF-(ON)           $18.18

R RUDDER PEDAL 1TL1-7              1             (ON)-OFF-(ON)            $18.18

L AHRS SLAVE 1TL1-7                    1             (ON)-OFF-(ON)            $18.18

R AHRS SLAVE 1TL1-7                   1              (ON)-OFF-(ON)            $18.18

L LDG TAXI LIGHTS 1TL1-1              1               ON-OFF-ON               $18.46

R LDG TAXI LIGHTS 1TL1-1             1                ON-OFF-ON              $18.46

SMOKING / BELTS 1TL1-1              1                 ON-OFF-ON              $18.46

STROBE / BEACON 1TL1-1            1                 ON-OFF-ON              $18.46

RECOG LIGHTS 1TL1-1                  1                 ON-OFF-ON              $18.46

ENGINE SYNC 1TL1-1                    1                 ON-OFF-ON             $18.46

NAV LIGHTS 1TL1-1                        1                 ON-OFF-ON             $18.46

 

NOTE: There are other less expensive alternatives to the “TL” series switch. If you want to save a few bucks and are not overly concerned about the exact authentic look, check out the “NT” Series. They still have the red rubber seal inside! These prices are subject to change by the supplier, Online Components.

 

Use 1NT1-1 to substitute for: 1TL1-1 ($13.19 each)

And 1NT1-7 to substitute for: 1TL1-7 ($13.12 each)

 

(Posted by Mark L. on 07-31-11)

This is primarily for those that have built or almost done with their panels:

http://www.markdidit.com/Project45/MIP/LowerPanels/project45_mip_lowerpanels.pdf

 

Some time ago I built a master parts list for switches used on the lower panels. Are there any changes or additions that need to be made? I'm going to order mine this week and wanted to see if there were any changes to the list that I should be aware of. If so, then I can update the list as well that is on my website referenced in the Resources page on this site.

 

NOTE: While the Honeywell switches listed Arrow NAC as a source, I wasn't able to get any there a few weeks ago, but I did find them all at Online Components. Getting the real authentic thing isn't cheap though, I think I spent $217 for all of them. Now I need time to build or purchase panels to install them.

 

(Posted by Shane Barnes on 07-31-11)

Hey Mark, I don't know of any changes, all seems to work. I opted for the PWM switches on crew lighting panel but this will be a personal preference as you stated. I still need to order the correct rotary switches for the electrical panel myself, also a couple of rotary encoders for the pressurization panels and a few more PWM's and I should be ready to start interfacing.

 

Just to add a little more info about the PWM switch, the PWM dimmer/switch we opted to use also has another nice feature in that it has an actual off/on position with a click that you can feel. There are some cheaper PWM dimmers out there but I have been told that they do not have the off/on clicking feature and may be why they are listed as dimmers vs. dimmer/switch. There are 2 different versions of the PWM's that we are using on eBay at the moment one is 2 amp and the other is a 6 amp. Ron and I opted for the 6 amp.

 

(Posted by Eric Tomlin on 09-19-11)

Thanks Mark, the newest illustrations have been updated per your email and can be found HERE

 

Alan made the "Master" of all LJ45 sim switch lists HERE

 

(Posted by Will Sasse on 05-09-12)

I've just received some lower MIP panels from Eric! But now I need to know which AML's are MOM, which are latching, and which are dual LED. I have Alan's great spreadsheet for parts list but it doesn't have that detail.

 

I remember before that there was a list of switches and types, but I can no longer find it. I also seem to remember it wasn't complete. Anyone still got that old list, and can complete it?

 

(Posted by Randy Buchanan on 05-09-12)

I have a copy of the Project45 button guide if you need it. This is the list which has the type ie "momentary or latching". But one still needs both lists:

Ron 1095

 

Ron 1096

You can download these documents at the bottom of this post

 

(Posted by Will Sasse on 05-09-12)

Randy, that is the list I remembered.

 

Eric, yes Alan's list tells me how many AA or AB's I need, but doesn't tell me which actual switches are AA or AB. It would be sufficient to list the buttons that are one type, and all others are then known to be the other - simplifies the list somewhat.

 

(Posted by Mark L. on 05-09-12)

Just so this information is in more than one thread, this is a list I compiled that is specific to the AML switches with dual LEDs:

 

Description                  Location               Qty              Colors *          Type*

________________________________________________________

Master Caution         Glare Shield           2 ea         Red, Amber*        Mom

Ext Power               Lower MIP Elec       1 ea         White, Green       Latch

APU Power             Lower MIP Elec       1 ea         White, Green       Latch

Emer Battery           Lower MIP Elec      1 ea         White, White        Latch

Bus-Tie                    Lower MIP Elec      1 ea         White, White        Mom

Gear Indicators        Lower MIP Hyd       3 ea          White, Green       Static

APU StartStop         Center Console      1 ea          White, Green        Mom

Engine StartFire      Center Console       2 ea          White, Red           Mom

SELCAL                 Center Console       1 ea          White, White        Mom

 

* Colors - (top, bottom) - Amber could be Yellow, Orange (Builder preference)

* Type - Momentary, Latched and Static

 

Here are a few documents to help figure out the functionality of each switch:

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Hey Roel,

This is the thread you are looking for.  If you have any questions, post them in this thread and we will answer them for you here.

I am all good now ! 😉

This is what i was looking for.