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6.4 X 4 Props with inserts -- 2 PACK [Good For High Elevation]

$5.00

This prop is a good choice for high elevation flyers (over 4000 ft)

The 6.4 X 4 prop can be used with the stock Zagi Pusher motor at elevations of 4000 ft and above. The prop cutout will need to be expanded to the bigger prop. You have to sacrifice about a half inch of elevon.

How to use Li-Po batteries with the stock Zagi Pusher Motor on a Zagi-XS and Zagi-60

The first issue using a Li-Po battery is the low voltage cutoff of the ESC for brushed motors. The Zagi-20 ESC for brushed motor has a non-programmable low voltage setting of 4.2v. Typically, Li-Po batteries should not be discharged below 3v per cell. There is a variety of lithium cutoff devices available. Just Google the words "Li-Po saver".

The second issue is that the Zagi Pusher motor was designed to operate with an 8 cell 9.6v battery pack and turn a 5X5 prop at about 14000 rpm at 14 amps. A 2 cell 7.4v Li-Po battery does not spin the 5X5 prop fast enough. Either more pitch or more diameter is required to equal that current load. The Master Airscrew 6.5X4 or the 7X4 prop will provide the load and thrust matching the 5X5 prop depending on your elevation.

The third issue is the easiest. The prop cutout will need to be expanded to the bigger prop. You have to sacrifice about a half inch of elevon.