I remember your postings from the beginning on the Aero-works 60/90. Do you still have and fly it? I stop reading the thread after I planted mine in the runway at about 400 miles per hour. Took it home in a trash bag. My saito 100 lived through it and will soon find a new home in a golberg ultimate.

I have the 160 in a hangar 9 edge 540. My buddy has a digital scale that we weighed it with and it weighed in at 10.5. I think this is astoudingly light given the weights everone else has. I am using light batteries, carbon fiber gear, foam wheels but that is about it. The relevance of all this? I then put the same scale on the same day on the tail wheel of the edge cranked up. 160 with an apc18x6W, 250rpms off of max right around 9000, maybe 8900, the scale only showed 15.5 pounds.

Now, the question is, A) is the scale off so my plane really weighs around 12.5 and the thrust is actually 17.5? My buddy, whom I trust for these things, says, tis not an error in the scale.
or B) We were on the field in the grass. I realize not the most accurate weigh to try and measure thrust, was there something we did wrong?

I had previously been under the impression that I should get approximately 17.5 to 19 pounds of thrust on with this prop/engine combo. I have a bolly 18 x 6 and was thinking of trying a mezlik either 18 x 6 or 20 x 6.

My goal is unlimited vertical. 3D flight and power aerobatics. It does not appear to have unlimited veritical though I've only flown a few times and have had a couple of minor mechanical difficulties.

You stated that the 20 x 6 throtteled up quicker. How is it that a 20" diameter prop, with the same pitch, would throttle up quicker?

Any info appreciated.