There have been several posts that state a pusher prop will improve your line tension
and thus improve you pattern.I tried it today and it really works good. The biggest
improvement was my hourglass,but also my vert. 8,overhead 8 and 4 leaf clover showed improvement. I think that Kaz Minato was the first to suggest this and I know
Dean Pappas posted this also. I flew 4 flights this morning and every one was better
than any previous flight on my NAKKE. My AXI 2826/10 used 2.19 mah with an Evo 4270 mah 14.8v battery.Lap times were 5.06 to 5.16 seconds. I was surprised that
my spinner cutout only had to change slightly for the pusher prop.

Walt
 
 

I ordered a couple the other day from APC and will try them right out---right after using a tractor 12-6 to see if I can detect a difference or not. Since my flying more or less s**ks, the main joy I am getting these days is from this experimenting! 

I don't recall exactly, I do remember when it went to the secure connection I got a warning, but I went anyway! The link I use is one that I have had for quite a while, so I am "pretty" sure it is ok.

One thing to note is that the original certificate (from your warning message) just expired at the end of last month.

Well I finally flew a flight with the pusher.

One thing I note is that it apparently is slightly less in pitch or load (or something). Since I am flying in governor mode I assume the rpm was the same as with the normal tractor prop (which I flew just before the pusher prop). I have four indicators--one the pull was slightly less (noticed right away, it took longer to get to the 4 leaf clover (I use a "talking timer" and normally it is signaling the 5 minute mark in the first loop of the clover, but yesterday it announced the 5 minute mark before I even got downwind), my lap times were 5.2 s (normally just under 5.1s) and finally my charger only had to put just under 1500mAHr into my 4s1p 2100 2100mAHr pack. Normally the charge is midway between 1500 and 1600.

So it made it a little difficult to assess whether I had more tension in the corners or not. Flew ok and I plan to leave it on for a few more flights at least. Not sure it is a flyable day today, but if it is I'll put on my EagleTree Data recorder to get a reading.

To my eye it looks pretty identical to the tractor, but something is different.

Alan,

It would be interesting to test the static amps on both props set to the same pitch on a pitch gauge. I think you can check the pitch by flipping around the swing arm and scale (think you will need to put the swing arm on the outside with out the numbers) or make a simple triangle block cut to the pitch angle at say the 70% blade length.

I am curious how your motor battery compares with mine on the 12x6. I draw 62amps at 9.9v with the 1500kV motor at 8600 rpm (about 24% throttle on the Ztron).

Best,       Dennis

Hi guys,
   Line tension in level flight may not be much more, if at all, but what about on outside maneuvers? Hard corners like the outside squares or the outside portion of the square eight. Or the hour glass, vertical eight and over head eight? No difference? P-Factor only works one way? hmmmm....... Does the airplane have to be retrimmed to take advantage of the prop? I still have not had the chance to try my pusher props.

Mike