Jump to content

Sign in to follow this  
Guest

Throttle Construction

Recommended Posts

Guest

Hi GuysJust wrapping up on my 727 throttle design, But I need to make a decision on the pots I should use before I can finalize it.I want to have as smooth of control as possible, to be able to make precision adjustments, Im a toolmaker and mechanical designer by trade and the the mechanical end of the throttle is first class.Im curious to know if there is anything better to use then 100k pots(maybe 10-turn pots?)thx in advanceFloyd Stollewww.stollco.com

Share this post


Link to post
Share on other sites
Guest MikePowell

Floyd,There is some background material on potentiometers here http://www.mikesflightdeck.com/potentiometers.htm that may be of interest to you. Not mentioned there is something called a "resistive position sensor". It's a spring loaded drum that rotates a multi-turn pot. A string, steel tape or some other flexible line is wound on the drum. Pulling it rotates the pot. Releasing tention on it allows the spring to wind it back onto the drum and restore the pot to its start position. With a quality pot, it is very linear and offers precise position location.A mechanism similar to this might be useful on your throttle quadrant. Appropriate selection of the drum radius will determine have many turns on your pot occur as the throttle is moved through its full range.Resistive position sensors are available from a variety of sources, but are rather pricey. However, after taking a look at your web site, I rather doubt you would have any trouble at all making your own.Mikewww.mikesflightdeck.comInfo for simpit builders

Share this post


Link to post
Share on other sites
Guest

Thanks for the info MikeI think I'll go with a bourns 91 series.>conductive plastic element<>100,000 cycles life

Share this post


Link to post
Share on other sites
Guest MikePowell

Sounds good, Floyd. One additional thing you might want to check is the pot's actual linearity at the extreme ends of its rotation. Depending upon its construction, a pot typically displays significant non-linearity in those two regions. This is the area that the connections between the resistive element and the metal terminals are made. Some pots can lose 40% of their linear range due to this. The Bourns unit is probably better made than this, but you might want to actually check the pot before you commit to a gear ratio.Mikewww.mikesflightdeck.comInfo for simpit builders.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...