I fitted the Canadair with three-blade props of 7x4.5 on the basis that dropping a size from the standard 8" twin-blade props is recommended. However, in this case, the originals are big paddle-props so a change to regular three-blade props of the same size would probably have been a better equivalency.
An issue with the bearings in one of the motors, which I was unable to remove for replacement, had me shopping for new motors and I came across the more powerful 250W version of the specified motor. Being the same size and weight, although with a lower quoted current draw, it seemed a natural choice, now that I had a better appreciation for the performance of the Canadair having flown it.
Also, given that the 7x4.5 props were undersized for the original motor, the higher kV rating, 1650 vs 1400, suits them very well, and the Canadair seems happy with the new combination and generates an impressive turn of speed at full throttle...
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