Freewing Su-35 (Vendor-independent; please read 1st post and stay on-topic) - Page 267 - RC Groups
Aug 23, 2012, 09:35 PM
John
Here's my test results... I didn't run it too long, but I ended up with 141A max at 3167W max... and that is with the system in the plane.

 Freewing SU-35 Build Video #10 Wattmeter (3 min 7 sec)
 Aug 23, 2012, 10:45 PM Registered User That is a very good result!! Hold it upright and see if it lifts itself!! But 2mins WOT time.... hungry!! hehe
Aug 23, 2012, 11:20 PM
John
Quote:
 Originally Posted by PeterVRC That is a very good result!! Hold it upright and see if it lifts itself!! But 2mins WOT time.... hungry!! hehe
I did in the preflight video....and yes it was starting to lift itself.
 Aug 23, 2012, 11:40 PM Registered User Glad I have 90A ESC's 'just in case'!!! The Nano test would have upset the prior 60/70's! Paralleled 5800 30C (= 60C in theory).... versus the 5000 65C Nano.... (not flying!) It will be interesting to see the results! Hmmm, I need those duct mounted ESC's!!! Work order assigned..... get to work!
 Aug 23, 2012, 11:56 PM 3DHOG peter your theory is off 5800mah 30c = 174amp continuous 5000mah 65c = 325amp continuous these batteries are not even close in comparison unless I misunderstood your post.........c-rating does not add together when paralleling its still 30c battery chemistry however your continuous amps will increase due to the capacity increase when paralleling example 1 5800 30c batt is 174amps continuous rating 2x 5800 30c paralleled would be 11600mah 30c which now has a continuous amp rating of 348amps it is still a 30c rated pack
 Aug 24, 2012, 02:03 AM Registered User ?????? All of what you just stated shows....... 2x 5800 = 384Amps That is the same as 5800 60C anyway. Paralleling effectively doubled the C rating. Plus doubled the capacity of course. But I can see the sentence I wrote that was not very clear. "Paralleled 5800 30C (= 60C in theory)"...... should have said 'effectively 60C'. LOL The reason for doing the test is to see how paralleling "X"C, will go against a Nano 65C
 Aug 24, 2012, 02:22 AM 3DHOG I guess what thru me is I didn't think this model could hold two 5800 packs so I thought you were talking about two packs together making it a 5800 pack total, thats what a 6s2p 5800 30c would be 2 x 2900mah packs in parallel, the pack you should have said was a 6s2p 11,600mah. anyway I just misunderstood what you were saying. still though no comparison with the two batteries the 65c 5000 will smoke it............at half the weight Last edited by jcdfrd; Aug 24, 2012 at 02:48 AM.
Aug 24, 2012, 03:39 AM
In the pipe 5 by 5...
Great flying characteristics on this one
 Souper Flanker (4 min 48 sec)

My two Gens Ace 4800mAh 60C batteries should arrive Tuesday. The two 5000mAh 60C's have proven their ability and remain mildly warm after each flight. Looking forward to that as well as flying this morning.
Last edited by urrl; Aug 24, 2012 at 04:42 AM.
 Aug 24, 2012, 10:10 AM Registered User Yeah, as mentioned, my outline was a bit vague and lacking enough detail to be fully clear. It is 'out of plane' (beside it) testing, just to see IF a pair of lowly Zippy's can match the 65C nano.... and their current, volts and temps etc. I do also have a pair of 2800 30C's but that paralleled battery end result will not be anywhere near the Nano.... just 168Amps, so not even half the ability. Though they are a theoretical match for the single 5800 30C, just a bit heavier. I guess I will test those also to see what comes out of that. But even the 5800 test is just that... an unusable pairing, due to weight in that case, so it is just as a test of what result occurs. More just to store data on combinations. By my normal 'rules' I would want about 250Amp capable batteries in this setup. (2x the 125A required). That means a 5000 50C or 60C (oh, surprise.. that is the Nano.... LOL). But the 5800's gave OK results in other aircraft... lower results but adequate.... so I went cheapskate on it, seeing I was buying FOUR. It still flies (flew) very well, FAST. So it would be interesting to see what level higher the Nano does - I think there is a lot lof loss is in the ducting with CS10's so that to get more thrust out, you need a LOT more power in. And something like the '140A Nano setup' versus '110A Zippy setup', might not even realise a good value return on dollar. For sure more thrust, but how much more? And even then, that gets reduced by airframe drag, so the overall cost of the yet unknown, but possibly small, gain is a LOT. \$108 versus \$69.. for what return? At the moment I can see one part of the return will be \$108 2min30sec flights, versus nearly 4min flights for \$69! LOL But anyway.... it needs recording to see the true thrust/speed difference.
Aug 24, 2012, 11:34 AM
In the pipe 5 by 5...
A few more lighting modifications.
 SU-35 more lighting mods (0 min 39 sec)
Aug 24, 2012, 04:14 PM
You are a "go" for reentry
Quote:
 Originally Posted by jk671 Here's my test results... I didn't run it too long, but I ended up with 141A max at 3167W max... and that is with the system in the plane.
John, could you run the motor at half throttle for a minute and then punch it to full throttle and tell us the numbers. Not that this isn't a great setup but peak on a fresh battery can be misleading. Too, after that minute are you still getting the 1:1 TWR.

AUW also.... try getting on a scale and then holding it in your hand to find out how much it weighs if your small scale doesn't go high enough.
Actually I guess I could thrust test mine the same way by seeing how much lighter I get... actually that may depend on your scale. Mine gets an average and then posts a weight. So if I change it would come back with an error.

My Wemos top out at 113 amps after a minute but still do 1:1. So not sure if thats what to expect from a CS10 or if the setup is showing losses...

Question to all cause I'm stumped. Do any of you ever get a strong stutter from your setups at certain throttle ranges? Mine is enough to almost add a brake effect on the fans even though they are not programmed with brake on. Anyone read a thread or something like that? Anyone know what may be causing it or if its on the motor side or ESC? Mines low timing low PWM and the brake function is definitely not on.
 Aug 24, 2012, 04:40 PM 3DHOG max here are a couple ideas for you to chase down 1,check motor wire connections for cold solder, loose or bad bullet connectors to the motor 2, check motor wires where they come out of the motor for cut or damaged wire insulation causing a short to the case of the motor on one of the phases 3, incorrect timming can cause this also, try changing the timing and pwm rate 4, check esc/ motor compatibility......some motor and esc combo's dont play well together let us know what you find
 Aug 24, 2012, 05:44 PM Should've, Would've, Could've Max, Are you using HW pentium/fentium 80a escs still?
Aug 24, 2012, 07:03 PM
You are a "go" for reentry
Quote:
 Originally Posted by v8truckin Max, Are you using HW pentium/fentium 80a escs still?
The 70HV. I spoke with Mark about it and he said it does show up now and then but didn't have an explanation for it. But for some reason its starting to happens more than I care for. I've changed the timing but that only shifts when it happens.