Hi Angus!

I have tried a Mejzlik 16*12 on my 140DZ. Visually the Mejzlik appears to be nothing but a clone of the APC 16*12. The only difference is that the Mejzlik has a thicker trailing edge and is about 0,3mm thicker all over. The weight of the Mejzlik is 86g. This is 20g less then the APC (106g). The Mejzlik has several nice characteristics compared to the APC, but the thick trailing edge is not a good thing.

When changing from APC 16*12 to Mejzlik my engine dropped 100 rpm and prop noise was louder. I hade no sound measuring device, but I could clearly hear a difference. I cant explain the sound in English (more whining, hissing ?), but its what one could expect from the thicker trailing edge. For this reason I have stayed with the APC.

I may try to sand down the trailing edge later to see if it makes any difference. I would like to use the Mejzlik for the weight saving and beautiful finish. As you say the price is not a problem. I think we often spend a lot more money to save 20g.

For anyone that would like to try Mejzlik the good thing is that you do not need to buy several sizes to experiment which works best. All pattern sizes seem to be APC clones so buying the same size as your favourite APC is enough (If that Mejzlik size exist). Correct me if im wrong. The only one I have compared closely is the 16*12

Anyone tried the carbon fiber props from Engel modellbau?

/David Lundstrom