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mCP X Brushless Mods Blade Micro CPx Brushless Mods and Conversions |
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03-06-2012, 09:08 AM | #101 (permalink) | |
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Quote:
Is only held in by the screw. Once the hole elongates you get movement.
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MSH PRÔTOS Rave Ballistic 635 |
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03-06-2012, 09:10 AM | #102 (permalink) |
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That makes sense. I was wondering why sometimes the tone was louder than other times. Thanks for the heads up.
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03-06-2012, 03:52 PM | #103 (permalink) |
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A few more flights in today befor the wind got crazy
Normal mode with 80% flat throttle curve flew wonderfully. Very easy, and it felt like an HP05S threw the flight. Very good power and smooth flight. Surprisingly battery was at 3.75v, which is .05 higher than usual at 100% at the 4min mark. I suspected higher ESC temps and more battery drain as not running at 100%, but apparently I was wrong. Great power, and lower HS for potential indoor/easy flight. IU with 100% Throttle curve flew amazingly well. I still notice just significantly more pop and HS than it used to have. Im not sure if the 20AWG wires on this ESC is letting more current threw (was using 22 on my non-flashed XP12A), or i just got a better factory ESC (AEO vs WoW hobbies versions). I cant imagine the flash would increase performance, especially since at 100% the governor is disabled (If i'm understanding this correctly). Regardless I am a happy camper. Enabling 2 separate IU modes for the 6i is pretty amazing. Especially since you still get a soft start in Normal mode. No converter is a huge plus, especially since I was jealous of the V2 owners using Walkera ESC's. HUGE thumbs up to SSKAUG and all your hard work.
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03-07-2012, 08:03 PM | #104 (permalink) |
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Just finished installing my governed XP-7A.
Good news: It works phenomenally well. Thank you Steffen and Dylan! Bad news: Be careful about how low you govern the RPM. As has previously been mentioned, it's possible to over heat the esc, motor, or both. I just discovered that 65% is a no-no for an HP05s. The ESC didn't even get warm, but you could fry eggs on the motor. It shutdown in flight from the motor being too hot. This was just hovering in the house, no pitch pumps, nothing stressful at all. I'm waiting for the motor to cool down before I see if it even works now. I'm pretty sure I at least caused some magnet damage. I hate to be the idiot to discover the lower limit, but I guess we will need to establish minimums for each motor somehow. At least we now know that the limit for an HP05s is somewhere above 65%. Too Long; Didn't Read version: If you are running a governed ESC and an HP05s, don't govern at 65% or below. |
03-07-2012, 08:22 PM | #105 (permalink) |
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Interesting...are you sure something else isn't at play with the motor heat? are you using the same motor that was stuttering? having one of the leads shorted to the case of the motor will heat things up too....
Ill do a test on one now and see 100% Vs 65% and check motor heat |
03-07-2012, 08:26 PM | #106 (permalink) |
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It is the same motor.
I let it cool off for a bit over 30 minutes. After my last post, I put another battery through it, this time at 80% RPM. It went all the way to the end of my six minute timer no problem. With this ESC, there is no start up stutter at all. It just smoothly ramps up to whatever the governed RPM is set to. |
03-07-2012, 08:34 PM | #107 (permalink) |
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I just did 2 3minute flights on the Matt Bockman motor (4 gram 13000KV) one at 65% (85F after the flight)
one at 100% (82F after the flight) It might be different with the HP05S, but shouldnt be that far off, both are 6 pole motors in the 13-14K KV range..... Very interesting! Dylan |
03-07-2012, 08:37 PM | #108 (permalink) |
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I had run it at 50% for a few minutes while holding the heli in my hand just to make sure everything was working, then popped in a fresh battery, and two minutes into the flight at 65% it shut down.
Hmmm... Gonna go mess with it a bit... try a few more flights at higher RPM's and see if it shuts down. Dang, I wish I had an IR temp gun. |
03-07-2012, 08:39 PM | #109 (permalink) |
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Guess I'll need to make a mental note of not going too low. Fortunately I'm not a fan of the lower HS anymore, but I am flashing an ESC for a buddy and it would be good for him to know beforehand. Hopefully your setup is alright!
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03-07-2012, 08:47 PM | #110 (permalink) |
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Dylan,
You mention earlier that the 14k may not work well governed, but you seem to be utilizing it on your Matt Bockman lower KV motor. Any reasons why the 14k won't work as well? I plan on flashing a spare ESC and giving a friend my 14k.
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03-07-2012, 09:24 PM | #111 (permalink) |
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Join Date: Mar 2007
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It depends on what you think "governed" means. To me it means that whatever RPM you set stays the same throughout the whole flight. With the lower KV motors to get good performance out of them you are so close to 100% throttle that its not really being governed, its more like having a V throttle curve, so as the battery voltage sags the headspeed drops with it.
I am also speaking of getting max performance out of the main and tail, lower governed headspeeds will work the tail harder. Each motor will be different, the Spin 14K might have enough torque to govern well on a 10 tooth, where the HP05S might not. Anything is possible though, only way is to test everything out. On the HP06V2/9 tooth and Hyperion 550 setting a governed speed of 6300 RPM seems to work the best, you get 6300 on a fresh pack at 0 pitch, and 6300 at the end of a 4:30 flight at 0 pitch. Governors need overhead to work properly, the HP06V2 is a hotter motor at 0 pitch and 100% throttle than the 915, but doesn't have anywhere near the torque of the 915. The Bockman motor will fly governed at 65% but its not a whole lot of fun (for 3D), its much better at 100%, just like the C05M and HP05S. Dylan |
03-07-2012, 11:46 PM | #112 (permalink) | |
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Quote:
My technique has been to use constant rpm as opposed to governed, whereby above a throttle threshold the headspeed remains constant, allowing any throttle curve to be used. By manipulating the throttle curve, better tail control can be achieved. I think Steffen has incorporated this feature, and it may prove useful to experiment with it. |
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03-08-2012, 01:32 AM | #113 (permalink) |
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Thanks Roffey,
I haven't tried that governor mode yet, I have such great results now I wonder if it can get any better to be honest, but I am going to explore it here soon. |
03-08-2012, 11:42 AM | #114 (permalink) | |
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Quote:
Motor and ESC (double replaced fets on XP 3A) were both at 40C after the flight (up from 22C ambient). Not more than expected. I think possibly the motor short you have/had is playing some tricks on us. |
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03-08-2012, 01:29 PM | #115 (permalink) |
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Simply mind-boggling!!! Excellent work, Steffen!!!
My question is if this will work with the Oversky 6A/10A ESCs? They use SiL F330 chip. Looks like the 3 places to be soldered wires onto are "conveniently" ready. Is hp07/9T a good candidate for governed mode? |
03-08-2012, 01:50 PM | #116 (permalink) |
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Join Date: Mar 2011
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Now you guys have done it! I've been sucked in and am going to get the bits and pieces to start experimenting this as soon as I get my real computer back.
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Team Newb pilot All my helis and quads were lost in a tragic boating accident. |
03-08-2012, 02:14 PM | #117 (permalink) | |
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Quote:
Myself I have a HP07 and 8T running very fine in governed mode up to at least 5500rpm. If you want to go higher than that, then maybe 9T is a better choice. In general 9T will always give more headroom for the governor than 8T. The cost of this is a little less flying time and harder load on the battery. But if you run hyp550 then the batteries should hold fine. |
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03-08-2012, 02:36 PM | #118 (permalink) |
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Thanks for the quick reply, Steffen! Bummer for the Oversky ESCs which seem to be not the best start for this project. I just happen to have a few Oversky ESCs.
I'm running hp05s/9T/Hyperion550 and love the power and punch and have been flying a lot lately to get use to the power before even thinking to try running my hp07/9T 100% flat throttle. With the governed mode available now, I would love to fly the hp07/9T governed to the 1st-min performance of my current hp05s/9T/Hyperion550. |
03-08-2012, 03:32 PM | #119 (permalink) | |
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Quote:
After the initial over heat, I flew it a bunch more times, including once at 100% to see if I had any heat related power loss. No noticeable power loss, so I went back to running it governed at lower and lower RPM's. The motor never got hot again. I even went down to 50% with zero problems. Why it got hot the first time out with the new esc, I have zero ideas. Outside and governed at 80%, my limited skills have been unable to induce any noticeable loss of head speed. Inside, hovering around the house at 60% is fantastic. Thanks again Steffen and Dylan. |
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