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Main => Builders Discussions => Topic started by: RPPerry3 on January 25, 2019, 08:05:55 AM
I need help calculating the correct diameter of spur gear so that my potentiometer gets near 300 degrees rotation as it travels the length of a 300mm rack.
I'm building a custom flight yoke and this is for Yaw control. As I push the yoke shaft in or pull back the carriage will have the Potentiometer with spur gear that rolls down the rack gear as input.
(https://i.imgur.com/8HXXfrq.png)
(https://i.imgur.com/IVBK2Vn.png)
I assume you meant pitch control :)
Have you thought about using a string pot instead of the gear assembly you described. So much easier to build with.
You could also use a slide pot. That just slides in and out with the elevator pitch control
A lot less complicated.
Trev
Jim's suggestion is spot on. I've been using the same string pots for many years in my TQ. So, those would be great for a Yoke setup, or like Trevor suggests, the slide pots will work just as good... :idiot:
John
Diameter would have to be 115mm
360/300(degree ratio) = 1.2
1.2 x 300mm = 360
360mm/Pi (3.142) = diameter 114.57mm
Cheers Gwyn
Quote from: Aerosim Solutions on January 29, 2019, 04:17:43 PM
Diameter would have to be 115mm
360/300(degree ratio) = 1.2
1.2 x 300mm = 360
360mm/Pi (3.142) = diameter 114.57mm
Cheers Gwyn
Gwyn, This is amazing.. you described it perfectly. Thank you.
Trev
I know this is very late, but thank you to all who replied. I had to drop the project. It was a quiet Sunday afternoon and my wife ran down the stairs waiving the magic wand of disappearing.. . it had two "++" symbols. Meaning my space for a cockpit and funds would now belong to my (now 2 year old) baby girl. I couldn't be happier being her daddy and I'm now able to get back into building a cockpit of sorts, but the 738 is far outside the budget and room so I'm considering my second favorite aircraft KA350.