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Post by sgmason on Jun 3, 2012 18:12:09 GMT -4
I would say it is worth the phone call, I am sure they have much more experience with sorting this sort of thing out.
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Post by t1602 on Jun 3, 2012 19:30:35 GMT -4
I have finally started to get mine in the air. I have experimented with gov modes( not enough head speed) I have it in normal start up now. I reduced start up power to 20% and also have a heat issue and shuts down at 3 mins also. I have come to the conclusion that this esc is going to be replaced as soon as possible.
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Post by osidak on Jun 3, 2012 21:09:18 GMT -4
Well that is disapointing to hear.
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Post by osidak on Jun 4, 2012 21:25:47 GMT -4
Ok while doing some reading last night about speed controllers I found something of interest - If you are not running a speed controller at least at 80% or more it causes more heat to generated/build up.
This afternoon after work I pulled the heli out (in pretty heavy/gusty winds) I changed the pitch curve a bit to lower it at any given RPM. The tought process was to decrease lift at a given rpm so I could hover at a higher head speed.
The results where around 6.5 to 7 minutes and ending voltage of 3.8v/cell - I only ran two packs through it as the wind was beating me up pretty badly and I felt I was probably pushing my luck.
So assuming I "fixed" the issue what is the correct way to fix this? I believe I should drop down a tooth on the pinion but that will decrease head speed over all and everthing I have read said I should be getting into the air one knotch over center stick and that would not happen with decreased head speed correct?
I am a newb to both heli's and electrics so pardon the "stupid" question
Thanks in advance
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Post by sgmason on Jun 5, 2012 0:31:19 GMT -4
In my mind raising the head speed while lowering the pitch will give to the same lift at the same stick as the lower head speed and higher pitch. The difference will be how hard/efficient the motor will be working.
I am no expert on helicopters, about as new as you are, but electric motors work better at higher speeds. I have a variable speed 1.5 HP belt grinder, at low speeds I can stall it out easily when grinding, but if I crank the VFD (Variable Frequency Drive) up I nearly have to push the bench over while leaning into the contact wheel to get it to start to slow down.
I am looking forward to see what the more experienced pilots have to say. Did you use the throttle and pitch curves recomended in the Chaos manual?
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Post by chitty024 on Jun 5, 2012 0:32:29 GMT -4
just in case you still need it here is a pic i took of the programming instructions. Not the best but you should be able to see what you need.
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Post by osidak on Jun 5, 2012 8:01:33 GMT -4
Thanks Chitty - I ended up finding it - In theory I have all low voltage protection turned off at the moment. To be honest I need to look at the throttle/pitch curves in the manual. A good friend set them up for me. He flies a Fusion 50 and he has been my local expert. We missed getting together this past Sunday and I don't want to over use him kinda thing, you guys well that is another thing I can fly the hell out of a nitro plane...... these crazy things that would rather hit the ground on the other hand....... I spoke to him last night - he was saying I should leave the pitch curve alone and bump the throttle curve higher. Will try that this afternoon and put a few packs through it.
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Post by osidak on Jul 13, 2012 21:23:55 GMT -4
Finally there is happenies in the land of the 600's at my house
i ditched the phoenix 115 and put a Castle Ice 100 in its place. had to redo all the wiring that dealt with the motor and then reclock the motor to a different position on the mount - in the end though I am seeing 8.5 to 9 minute flights running a governed 1850 rpm and shutting down with 3.5 volts per cell.
I would love to be able to pick the head speed up some as govern 2 position is currently set to 1700 rpm and the head speed is too low and the tail bounces up and down. 1850 is the highest I can go. Per the castle software the 16t pinion will only give me about 100rpm more allowing for "overhead"
It is nice to finally get to do something with it other than spool and shut down. Oh and the slow start on this esc is SO nice
thanks for the help
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Post by tt408 on Jul 13, 2012 22:12:38 GMT -4
I had the same problem esc getting hot. I went with another esc but have not had a chance to try it yet.
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