I will try to answer some of the questions.

After the discusion on Yahoo Groups about pots to be used in E-Carrier I thought that the information should also be shared here for all of the fliers interested in Navy Carrier.

Cermet pots are not wire wound elements. Wire wound element
technology is almost exclusively used in high power applications
today. What is common today is a resistive plastic element that the
wiper rides on. Cermet elements are good for extended use and many
adjustments. The manufacturer rates them in thousands of rotations
of the wiper. Some models are rated for 50,000 rotations. The big
difference is that we are subjecting th pots to a lot of vibration
and that could wear the element in spots.

The Single Channel U/Tronics units are designed to give a
slightly greater than 1.0 to 2.0 msec output pulse width with a 10K
ohm pot. They typically measure 0.8 to 2.2 msec. pulse width range.
You may not need the full range of the 10K pot to control the ESC.
This might allow you to increase the sensitivity of your throttle.

I should also mention a third type of resistive elements being
produced. That is a Deposited resistive element. This is a conductive
coating that is applied on to a nonconsecutive material. The advantage
of a deposited verses a conductive element is cost of manufacturing.
The down side is that they wear out in a limited number of rotations.
If used in our application, they would rub a hole in the resistive
coating causing an open circuit even though the end to end resistance
is still in tolerance.

The other thing to keep in mind is that pots are made in two types.
Linear and Audio taper. A linear taper pot will measure about half of
the end to end resistance at its mid point but an audio taper (logarithmic) pot will
measure about 90% of its end to end resistance at the mid point of its
travel.  We only want to use Linear taper pots.

Hope this information helps with your selection of pots for your E-Carrier model.

Clancy