Prop Selection Graphs
The 3 prop selection graphs are truly unique. Once you grasp the concepts, you
will find them to be useful tools. The two axes are diameter and pitch. The red lines represent D vs. P for a fixed current. If you think of each
intersection of green lines as defining a prop size, you can easily see how much current it should
draw. The solid blue lines are boundaries based on best motor efficiency. You
can change the range by simply entering a new max value in the AMPS text box.
The right-most dashed blue line represents P=D. The other is P=D/2. The X represents your prop selection on the main screen. If you point your mouse
cursor near a green-line intersection and click, the X will move to the nearest intersection.
If you click the Select button, you will return to the main screen with the prop size specified by
the X. Now comes the cool part. If you click the mouse while holding down the Ctrl key, you will create dots that 'snap' to the grid. Ctrl-click a dot to remove it.
If you click the List button, you will get a list of the performance of all the props you selected!
You can print this list, save it in a text file, or sort it by up to three categories.
This is the current used to construct the graph. On the Current graph shown below, it is the maximum current, and the minimum is half of
this. The program makes a guess at this number and you can change it in the text
The three prop selection graphs are used in the same manner with a few
exceptions. The Gearing graph below has curves representing different gear ratios with the indicated
current. It otherwise works the same as the Curent graph.
The Cell Count graph below has curves representing different cell counts with the indicated
current. It works similarly to the other two graphs with an important
difference. If you click your mouse to move the X, the graph will redraw itself by assuming the nearest integer cell count and
recalculating current accordingly.