{"id":135,"date":"2013-08-19T09:21:16","date_gmt":"2013-08-19T09:21:16","guid":{"rendered":"http:\/\/lowtone.de\/wordpress\/?page_id=135"},"modified":"2014-04-29T19:51:22","modified_gmt":"2014-04-29T19:51:22","slug":"original-throttle","status":"publish","type":"page","link":"http:\/\/lowtone.de\/wordpress\/?page_id=135","title":{"rendered":"Original Throttle"},"content":{"rendered":"

Hello,
\non this page -i\u00b4d like to show you the pictures of the original B737-300 TQ conversion. This page will be updated regularly as the TQ conversion project will progress.<\/p>\n

Start<\/p>\n

\"2013-04-08<\/a><\/p>\n

This is the TQ as it arrived in April 2013 at my house.The TQ was bought at www.oncealoft.com<\/a> and shipped with FedEx. Before starting the conversion i need to put it apart.<\/p>\n

\"2013-06-07<\/a><\/p>\n

The inner shaft is securing the trim wheels.<\/p>\n

\"2013-06-07<\/a><\/p>\n

The trim wheels have been removed.<\/p>\n

\"2013-06-07<\/a><\/p>\n

Side walls and Trim Lightplate have been detached.<\/p>\n

\"2013-06-12<\/a><\/p>\n

There is a lot of dust and dirt inside. I used a toothbrush to clean it out. Better idea would be to use pressured air but i do not have a compessor.<\/p>\n

\"This<\/a>

This shows how the trim indicator is connected to the Servos motor.<\/p><\/div>\n

The Motorization for the Throttle Levers is provided by 12V DC motors. The have a small gearbox and turn with 15 rpm. A simple slip clutch is mounted on the motor shaft. The slip clutch prevents damage to the motorization system and enables manual movement of the levers while the motors are powered. The coupler connects the 6mm shaft with the 8mm shaft used for the spur gear. The coupler is the weakest point and i have to replace it as soon as possible. It tends to bend a little bit when the sprocket chain is under tension.<\/p>\n

\"Motor<\/a>

Here you can see the parts used to make the driveing assembly. The slip clutch is needed for manual operation of the throttle levers.<\/p><\/div>\n

Below you can find a picture of the complete unit which drives the Throttle Levers. I need to improve the Holders for the DC Motors also.\u00a0For the position measurement of the Throttle Levers, i purchased draw wire potentiometer. These units are basically a multiturn potentiometer (Bourns) and a spring loaded return mechanism. if you move the levers the movement is transfered with steel cable and sprocket chain. The draw wire if the potentiomenter is attached to the sprocket chain. If you move the lever, the wire is pulled out and the potentiometer\u00a0give out the\u00a0changed resistance. If you move the lever to other direction, the wire is pulled back inside.<\/p>\n

You can have a look at the youtube video i made which shows the mechanism.<\/p>\n

 
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