Hi to all of you. New and old Zero builders.

After a few months of break, making Zero's is coming to an end. By some plans, the model had already supposed to fly, but private and
also, business probems came on way. Some time and we can not affect everything that happens in the life.
I have decided to test several propellers today, and chose one of them for a maiden flight.





In competition were propellers

1. Master Airscrew K Series (plastic) 16 x 8

2. Pelikan (wooden) 16 x 8

3. Menz Props (wooden) 17 x 10

4. Graupner Sonic (plastic) 18 x 8





Instruments for Measuring revs and pulling power where these



Tachometer is from tower hobbies, and scale was bought in the Chinese shop in my town for 5$.
It can measure up to 40 kg.

And here are the results

1. Master Airscrew K Series (plastic) 16 x 8
max speed 8750
thrust 5.9 kg

2. Pelikan (wood) 16 x 8
max speed 7700
thrust 4.2 kg

3. Menz Props (wood) 17 x 10
max speed 6600
thrust 4.4 kg

4. Graupner Sonic (plastic) 18 x 8
max speed 7800
thrust 6.4 kg


So, the result is somewhat expected. Menz immediately scrapped, and the difference between Pelican and Master (same dimensions)
is amazing.
Graupner Sonic is my favorite after this. 80% of thrust comparing the total weight will, hopefully, be enough.

Factory recommendations are:

prop 18 x 7 - 12, or 16 x 10-14
and speed does not exceed 7500-8500 (in air)

So, it would be great to find some propeller which will give a little more speed and maybe even few grams of thrust.

Every help and feedback is welcome.