RE: DualSky 11T testing
 

I'm a flyer rather than an electrically-literate person I'm afraid, but, when I meet up with someone with the Wattmeter thingy,I/ll try to get those numbers....
Just from watching the flight performance,and seeing how many maH go back in,I haven't seen any degradation yet.
From memory,the CC85HV ESC has three timing optionslow, med, highdon't think actual degrees are quoted?
Certainly with my set-up, only the low timing is viable- with the other options,the motor will not throttle up.

RE: DualSky 11T testing
 

F3A ... thanks for the pic ... putting in my own firewall would be a worry for me, either I may not be able to build it strong or the thrust lines will be totally off ... :( Maybe I should just stick with a Hacker motor when I buy the plane. :)

RE: DualSky 11T testing
 

Hi I flew with f3a05 so did a comparison between Dualsky 11t with cchv85 and FP evo Lites versus Hacker C50 and pro lites. Both planes using a 20.5 x14 APC prop

The dualsky was 6000 rpm and the Hacker 5600 RPM. There was approx 100 rpm drop on the Dualsky on a full power test at the end of the flight.

RE: DualSky 11T testing
 

Oops I duplicated the attachment while on the phone. The left part of the graph is the dualsky and the right part the Hacker

RE: DualSky 11T testing
 

Many Thanks Nigel (Hairy Flyer)-I couldn't have managed much of that myself!
Just to add-the Dualsky flight was: Static test to check WOT rpm,fully charged volts and amps, then straight into a F09 schedule, then straight back down to the ground, and another static WOT rpm, volts,ampsthe single vertical long line at the RH end of the trace,I think?
Many Thanks again Nigel!

RE: DualSky 11T testing
 

Thanks Nigel, the Flight Power pack looks like it is doing the job. Unfortunately we can't see the voltage under the peak current load. Maybe you could give us the same chart with just the voltage so the minimums can be seen.
I would expect that packs used on the Hacker would last a lot longer than those used on the 11T based on my experience but I may be wrong.
I've flown over 600 flights using the Hacker C50 and DualSky 12T and the only time I exceeded 65 Amps was when the C50 had a "slipped rotor" problem. I believe that pulled some extreme currents and degraded my three TP Prolite packs but four of the six 5s packs are still going. I had about 60 flights on a True RC pack, all on the 12T, and never saw voltages below 34 volts under peak loads. After a few flights on the 11T with currents in the high 70s, I saw minimum voltages below 33 volts which I consider bad for pack life. I don't have enough data to back this up so I guess I could sacrifice a pack and see how long it will last at these high currents. How old are your FPs used in this test? Have you seen any degradation since they were new? Thanks again for the good work.
Jim O

RE: DualSky 11T testing
 

Jim O Hi. As requested voltages only. Looks like the data supports your view! The FP's are F3A05's so I dont know how many cycles they have done. The pro lites have done over 150 cycles now.

RE: DualSky 11T testing
 

The FP/DS11T combination looks like it is doing well. I bet you can feel the performance. The only question is how long will the batteries last. If we could get 150 flights it would be great. Keep track of them and let us know.
If one was into big time competition I guess you wouldn't care. Just replace them when they need it. I keep trying to hold the cost down while getting adequate performance. The 12T with batteries that haven't been abused seems to be the way.

Jim O

RE: DualSky 11T testing
 

I don't log the number of flights, but the three FP packs have been in the models for about 40 hours of "transmitter on" time.
I'd guess that equates to something like 30 hours flying, at around eight minutes per flight say seven flights per hour.
So the three packs have done 210 flights this year;seventy each.
As I said before, observed flight performance hasn't changed yet-and mAH used/put back seems to stay pretty constant, more or less, according to how windy it is mainly.

RE: DualSky 11T testing
 

F3A ... May I ask what temp you getting on yout FP packs after a flight?

RE: DualSky 11T testing
 

No idea re temp sorry ,can just say that the ambient temp here atm is about as high as it
ever gets-only around 80 degrees F though-and the packs are nicely warm to the touch after a flight but not uncomfortably hot.
Interestingly,when we were doing the static full-throttle (pre-flight) rpm checks asked for by OhD, the full 6000-6100 rpm was only reached after two,or three, 4 second bursts-presumably, even at around70-80 * F ambient, the packs need to warm up a little to give their all?

RE: DualSky 11T testing
 

F3A ... okay ... thanks ...

RE: DualSky 11T testing
 

Right now I give you the bragging rights for having the best batteries. It is difficult to read but it looks like 77+ Amps at 33+ volts at the end of flight after 70 flights/charge cycles. We'll wait for someone to top that.

It is interesting that they actually appear to recover a little after landing as opposed to during maneuvers late in the flight. Cooling?

Jim O

RE: DualSky 11T testing
 

It's easy to lose me in leccy technology, but,from what little I've seen, the batteries seem to get a bit warmer after landing,don't they? So perhaps that explains the slightly higher watts on that single vertical bit of the graph at the end.
That would be the WOT rpm check after landing.
The F09 schedule is quite power-hungry in the second half(big triangle from the bottom, stall turn with point roll up,K/E loop,climbing/rolling1/2loop,big hourglass with K/E/rolling45s climbs etc),and although I don't use all the throttle,the graph seems to reflect the schedule's demands quite well,I think?