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300X Blade 300X Helicopters Information and Help |
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08-24-2015, 06:22 PM | #21 (permalink) |
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Join Date: Mar 2011
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OK - been waiting for nice weather and finally have an update.
I swapped out my old LiPos for two fresh packs to test the LVC theory. First flight was uneventful. Flew 4 minutes with no issues. Second flight, the power cut out momentarily less than 2 minutes into the flight - then happened again a second time within about 10 seconds before I could land. I got it on the ground without damage (I think - minor blade strike on ground). The AR7200BX still had solid blue LED. I checked the battery voltage right after pulling it off the heli - all three cells were in the 3.93-3.94 range with a total voltage of 11.8V Not sure what to try next. I've got several other Bade helis that are all flying well (mCPx brushless, 130X, 450X). But, I'm findings myself obsessed with trying to fix the 300 instead of flying the ones that work! Seems like I should either fix it or try to sell it to someone else who can fix it and fly it i don't want it to end up as a hangar queen in my basement ... |
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08-24-2015, 07:12 PM | #22 (permalink) |
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Join Date: Dec 2014
Location: always windy on the east coast
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maybe theres a bad motor wire. have ya tried a different motor? could have a bad or loose winding..
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a bunch of helis... now all vcontrol and neo..finally :lol |
08-24-2015, 07:40 PM | #23 (permalink) |
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Did you have servo controls when motor power went out?
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mCPx'es/130X/3D-foamie: ugly mods 300X: fast beater/trainer, Protos stretched: trainer but can also go fast FPV250 5.8G, nQx FPV, Oh also Trex 450DFC |
08-24-2015, 07:46 PM | #24 (permalink) |
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I haven't tried swapping out the motor yet. I did swap out the ESC. Upon closer inspection after the latest power loss / minor blade strike it looks like I've got at least a stripped Jesus bolt ... so more parts and repairs needed before experimenting with swapping out more parts.
I couldn't find the Jesus bolt at the local hardware store or LHS last time and ended up having to pick up an entire head block. I really like the size of this heli compared to the 450X. But I've got less than 40 flights on it and it's been a headache I'm half tempted to pick up a 300 CFX and use the 300X as "parts." In the end that might cost me less than trying to chase down this problem by swapping out parts one at a time and making repairs in between |
08-24-2015, 07:49 PM | #25 (permalink) |
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I think so - but it's hard to tell because I was upright and the power came back on within about a second. After the second power blip it seemed to be drifting left which led to the blade strike on "landing" - but again happened to quick to say for sure if I had servo controls.
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08-24-2015, 08:21 PM | #26 (permalink) |
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OK. Took the head block off. Jesus bolt definitely stripped, but it looks like that's all the damage. Feathering shaft checks out straight (take one blade off, turn bolt, watch tip of other blade).
If I order a replacement stock motor would you recommend ordering a new 11T pinion vs. trying to pull the old one off the current motor? But - I'm just shooting in the dark here swapping out parts if I replace the motor. Same thing I did with the ESC and batteries that turned out to not be the issue. Not sure this is the best plan |
08-24-2015, 08:41 PM | #27 (permalink) |
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Join Date: Dec 2014
Location: always windy on the east coast
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it would be nice to "see" something broke or loose on the motor or bullet conn, but the stock motors are really crappy. take it out and chuck it up in vice and run it wiggling the wires, see if it cuts out. hang in there, these are nice practice birds when the kinks are worked out. keep us posted
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a bunch of helis... now all vcontrol and neo..finally :lol |
08-24-2015, 10:01 PM | #28 (permalink) |
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Bad/intermittent motor wires will cause ESC to fire at the wrong phase and the motor will act like a massive brake. Even for a fraction of a section, the 300X without OWB will definitely show the jolt by swing the tail.
IOW, bad/intermittent motor wires symptom should be very noticeable. OTOH, bad motor balancing causing vibe that freaks out BX is hard to detect. If you have to try a different motor. Try something other than stock motor. Any chance to try different servos?
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mCPx'es/130X/3D-foamie: ugly mods 300X: fast beater/trainer, Protos stretched: trainer but can also go fast FPV250 5.8G, nQx FPV, Oh also Trex 450DFC |
08-25-2015, 10:17 AM | #29 (permalink) | |
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Join Date: Feb 2012
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The Horizon service request for my AR7200BX shows status of Ready To Ship since yesterday. No idea if the one I sent is repaired, replaced, or in perfect working order at the moment. |
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08-25-2015, 01:59 PM | #30 (permalink) |
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Join Date: Feb 2012
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Just heard from Horizon on my AR7200BX service request:
Tested under high load, but unable to duplicate any kind of lock up or shut down as described. Out of the spirit of customer service the receiver was replaced. At no charge. Not even the shipping cost (Says priority, so I should get it before the weekend). This is typical of my experience with Horizon service. Honestly, I'd rather had them find something wrong with it. But, at least I'll know that it isn't the RX next time it goes down. With any luck, this will solve the issues I've been having. |
08-25-2015, 08:18 PM | #31 (permalink) | |
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08-25-2015, 08:20 PM | #32 (permalink) | |
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08-25-2015, 09:15 PM | #33 (permalink) |
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Have you even confirmed it's LVC? Like I said, LVC shouldn't normally cause a crash. It's soft and subtle meant to warn the pilot "LAND NOW!"
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mCPx'es/130X/3D-foamie: ugly mods 300X: fast beater/trainer, Protos stretched: trainer but can also go fast FPV250 5.8G, nQx FPV, Oh also Trex 450DFC |
08-26-2015, 06:12 AM | #34 (permalink) |
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I wouldn't describe my issue as "soft and subtle." The motor powers down completely for about a second, then starts back up.
To answer your question I haven't confirmed what is causing the problem. I have swapped out the ESC and batteries. So, I guess I've narrowed it down to the either motor, servos or AR7200BX? |
08-26-2015, 07:53 AM | #35 (permalink) | |
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Join Date: Feb 2012
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I use these on the cyclics: http://www.buddyrc.com/kst-ds113mg-servo.html This on the tail: http://www.buddyrc.com/kst-ds215mg-m...tal-servo.html I've since read that the speed of the 215 make it more suitable for cyclic use, but I haven't had any issues with it. BUT, keep in mind that mine is falling outta the sky too. They seem a bit heavy to use as cyclics on the 300x If I was to replace all the servos again, I'd probably use the Spektrum servos that Horizon uses in the 450x V2 and the 360CFX. Or suitable digital metal gear Hitec servos. These were recently on sale for $16.46.Reportedly a clone of the KST 215 which is supposed to be a clone of an MKS. Purchased 4 for my 450x that has been grounded until the stock servos are replaced. That little project evolved to a complete rebuild with a Lynx frame before I even got started. https://www.hobbyking.com/hobbyking/...dProduct=71554 Decisions, decisions BTW: Replacing the servos will require a full BeastX setup. Mechanical binding in the current setup "could" cause a high current. A fresh setup on new servos would probably eliminate bad servos or setup. |
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08-26-2015, 01:08 PM | #36 (permalink) |
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+1 on all counts. I'm still on my KST215 for the tail (2000+ flights). A bit overkill for weight and power and not exactly optimzed for tail speed but I love the fact that it's the same servo as the TGY-S306G-HV I use on my 450 cyclic and my Protos cyclic (yes stretched 500-size with 470mm blades) so one spare covers all. Both the KST and the TGY will be way overkill for the 300X cyclic and make it heavy if you don't have upgraded power system. There are other good options for 300X cyclic mentioned in the big servo thread. Hitec, Emax, TGY-211, and even my favorite $7 Corona 919MG which works very well for me (but apparently not so for others).
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mCPx'es/130X/3D-foamie: ugly mods 300X: fast beater/trainer, Protos stretched: trainer but can also go fast FPV250 5.8G, nQx FPV, Oh also Trex 450DFC |
08-26-2015, 10:38 PM | #37 (permalink) | |
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I understand replacing the stock servos and motor with better equipment will probably be in my future regardless. But neither one seems like a clear cause for my current problem. I'd feel a lot better if I could find something wrong and fix it vs just upgrading parts. |
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08-26-2015, 11:12 PM | #38 (permalink) |
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Not saying servos are your culprit but when I had my servo problem causing BX to freak out early on I replaced a whole lot of stuff just to have the problem came back until I replaced the servos. There was no hint the servos was the problem but I knew from day 1 one was defective from the factory although it seemed to work fine in the air and even though HH replaced it problem still existed until I dumped all stock servos. Read more details on my stickied thread on top.
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mCPx'es/130X/3D-foamie: ugly mods 300X: fast beater/trainer, Protos stretched: trainer but can also go fast FPV250 5.8G, nQx FPV, Oh also Trex 450DFC |
08-28-2015, 01:08 PM | #39 (permalink) |
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OK - so I may have found the culprit
I pulled the motor today to inspect the wires I couldn't see. I found bare spots on two of the wires - apparently from where they were rubbing against the frame. this definitely seems like it could have been causing a short and making the motor cut out. As you can see in the picture, the two bare spots are very close to each other on the red and black leads. I plan to put heat shrink over the bare spots and try again. Now I need to replace the jesus bolt and get everything back together |
08-28-2015, 01:44 PM | #40 (permalink) |
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Join Date: Dec 2014
Location: always windy on the east coast
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didn't I tell ya about the motor wires glad you found it..this is basic stuff we all check and keep our eyes on and think, how did it happen, and how to stop it from happening again
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a bunch of helis... now all vcontrol and neo..finally :lol |
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