Originally Posted By: Kimer

a question : for the movement straightforward of throttle ,there is some slide potentiometer that can fit,or not?


You can use sliding pot: https://www.riecktron.co.za/en/product/813

But don't fit the throttle handle direct over then, this will worm out then fast.
Use linkages, e.g. RC ball-links.

Can use conventional circular pot too, but will be able to use few degrees of course, reducing controller resolution.
How is inside CH PRO throttle:

https://s32.postimg.org/m9d5zyjj9/CH_81.jpg

And the conversion of sliding to circular movement will be not proportional.
In CH this, and small circular movement on throttle is compensated in firmware (I guess).

And, using potentiometer install then in a way that make easy replace, since they have limited life span.