Originally Posted by peterangus

Ray

Since the Lanc seems to fly well on its current "geared can" set-up, the existing prop size and rpm would provide a good start point for an update.

In the absence of those numbers, I have done some speculative calcs. The attachment shows the Kvs required for some combinations of pitch, volts, and pitch speed.

The indications are for a Kv well above 600.

I see what you mean Peter, the one I measured this afternoon was 760Kv and *seems* ok with the varioprop

Ray

Did you measure rpm or efflux speed?

Originally Posted by peterangus

Ray

Did you measure rpm or efflux speed?

Hi Peter, no I have to borrow a tacho tomorrow, will let you know...