lee
PARK FLYER
Posts: 68
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Post by lee on Nov 14, 2012 12:13:57 GMT -4
Just upgraded my 600 to the scorpion 740KV and CC 100A ICE ESC. Today was the maiden. Everything was looking great. The soft start is amazing and the headspeed is alot higher than the stock, from1900 to 2300. It was all looking good until i started doing TicTocs. On the last the heli rolls on its back (not done by me) like i lost input control. Then it lost all power. You can hear i gave it too much pitch to try to flip it back upright but i had already lost power. So you would think its a case of LVC. But after checking at home, the ESC registers lowest voltage as 3.5V per cell and my battery checker said 3.8V at the crash site. My ESC is set to LVC of 3.2V So it would seem thats not the culprit. Its not the Amp cut off either as that only hit 65A Any ideas guys would be appreciated. Heres the video.
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jombo
PARK FLYER
Posts: 63
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Post by jombo on Nov 14, 2012 12:41:35 GMT -4
it could be the rx lost signal for a split second . maybe the sat ant was blocked by the CF frame somewhere
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Post by treotraveler on Nov 15, 2012 17:03:40 GMT -4
If you powered up your electronics through the Ice 100, 5 amp switching bec, you probably had a brown out, not enough current to handle everything and the esc got hot and quit working...
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lee
PARK FLYER
Posts: 68
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Post by lee on Nov 16, 2012 16:55:03 GMT -4
Thanks guys, If it was a brown out, would i not have lost full control of the model? This didn't happen. I had full control of the servos, just not enough headspeed to slow down for the auto. I have discovered the initial problem was, during the Tic toc as you can see in the video it flips out on to its back. This was due to the plastic servo wheel stripping the teeth on the elevator. The ESC i think went into LVC when i punched it. It didn't register in the log lower than 3.5V, but i only had the sample set to the lowest rate and it probably missed the 3.2V dip. Is this a reasonable theory? I will replace the servo wheel with metal ones. Are the Super combo servos compatible with the Align metal wheels? Cheers Lee
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Post by Valkman on Nov 16, 2012 17:21:35 GMT -4
But you said "On the last the heli rolls on its back (not done by me) like i lost input control. Then it lost all power ". Not to sound like I am contradicting what you said but w your original post and video and I was thinking about it. The gears were more than likely stripped from the crash looking at your blades in the video. It could have been a loss of signal also,what radio are you using? Did the rx tell you it lost signal? Sry im on phone if bad grammar. I'd like to get to the bottom of this. There is nothing worse than not knowing for sure what caused t event on your next flight.
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Post by treotraveler on Nov 16, 2012 17:40:40 GMT -4
@ lee..please re-read your original post. quote, the heli rolls on it's back (not done by me) like it lost imput control. Then it lost all power, unquote
truthfull information from you, would help the rest of us help you, when you ask for help...
The servo wheel got stripped when your heli hit the ground....
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lee
PARK FLYER
Posts: 68
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Post by lee on Nov 18, 2012 12:09:59 GMT -4
Maybe i didn't explain clearly enough. I pulled back on the stick to go to negative, but when i pushed forward stick, it carried on going to inverted. Thats what i ment by, not done by me. My stick input was opposite to what the heli was doing. I'm not sure that the servo would have stripped on landing, as you can see the heli landed on the skids, the blades were almost stopped before it tipped over. My conclusion from what i saw in the video and looking at the heli was, That when pushing the stick forward, the servo wheel slipped causing it to continue flipping, my instinctive reaction was to punch the negative collective way too much, which caused the LVC, low head speed, Heli landing harder than my poor landing gear could cope with. How does that sound? Possible? Thanks guys for all your help. One thing i always forget to do after a crash, is check the RX for power outs. Next time
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lee
PARK FLYER
Posts: 68
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Post by lee on Nov 18, 2012 12:13:12 GMT -4
Oh i forgot. Did anybody know if the align servo arms fit the stock combo servos? Thanks Lee
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Post by Valkman on Nov 19, 2012 4:14:48 GMT -4
I'd say if the wheel stripped in the flight you would not have been able to make a level landing with one of your 3 cyclic servos gone. I could be wrong though. That was a hard landing you could hear a big bang when it hit. What servos did you get?
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drev
FUN FLYER
Posts: 198
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Post by drev on Nov 19, 2012 16:45:50 GMT -4
I have the Super Combo 600 kit & the servos use Futaba servo wheels. Don't know about the Align wheels.
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Post by Dr. Evil on Nov 19, 2012 20:40:06 GMT -4
I have the Super Combo 600 kit & the servos use Futaba servo wheels. Don't know about the Align wheels. Yep, thats what I got on my 700. Just order some metal servo horns for a Futaba servo and you'll be good to go.
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lee
PARK FLYER
Posts: 68
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Post by lee on Nov 20, 2012 9:15:07 GMT -4
Thanks guys. I have the super combo servos. The Align wheels come in two types Align/Futaba or JR. They are marked on the wheel with an F or J. So i will be ordering some today. Thanks again.
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lee
PARK FLYER
Posts: 68
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Post by lee on Nov 20, 2012 9:20:43 GMT -4
I'd say if the wheel stripped in the flight you would not have been able to make a level landing with one of your 3 cyclic servos gone. I could be wrong though. That was a hard landing you could hear a big bang when it hit. What servos did you get? I had to hold a lot of forward Elev to keep it level. It did sound like a loud bang, but i think cause it landed completely flat and the landing gear snapped, made it sound worse than it was. There was no damage anywhere on the blades or anything else, only the skids broke.
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Post by Dr. Evil on Nov 20, 2012 10:32:48 GMT -4
I'd say if the wheel stripped in the flight you would not have been able to make a level landing with one of your 3 cyclic servos gone. I could be wrong though. That was a hard landing you could hear a big bang when it hit. What servos did you get? I had to hold a lot of forward Elev to keep it level. It did sound like a loud bang, but i think cause it landed completely flat and the landing gear snapped, made it sound worse than it was. There was no damage anywhere on the blades or anything else, only the skids broke. WOW....from that video, you got away from that cheap.
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lee
PARK FLYER
Posts: 68
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Post by lee on Nov 23, 2012 14:43:00 GMT -4
I think i found out why it lost power and didn't show up on the ESC log. After putting everything back together and spooling up, the pinion was loose. I had tightened it down with thread lock and even put a thin layer on the shaft to help the pinion grip. I've ordered the metal wheels as well, so hopefully the next maiden will go well.
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