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ProModeler Scorpion Power
HelicopterGasser Model RC HelicoptersOther › Just about had enough of it.
06-02-2010 03:04 AM  7 years agoPost 1
fixed3d

Senior Heliman

Whitefish, MT.

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After dozens of great flights with my 1005, I have had nothing but trouble the last few weeks. It all started with an unexplained loss of tail control while practicing tic tocs, which ended in the dirt. $200 and two flights later I had what I thought was a swash linkage failure and a mid air boom strike. $300 and three flights later, (today) I had a glitch in the tail (just one 20 deg. twitch) followed by a total loss of control which resulted in going in on its side, ripping the carb off the engine, smearing the aircleaner flat, cracking the frame, destroyed 710s bending the (brand new) mainshaft, boom, feathering shaft and who knows what else. The last two crashes the 3000mah lipo went sailing through the windshield of the canopy, so I was not able to see if my Spektrum AR 7000 rx was blinking like maybe it lost its signal or power supply. It has a EDR voltage regulator with a Power Bus Pro servo isolator. Align DS-610 servos, Gy401/9254 combo gyro. I use a DX7 radio on this heli, past helis, and my airplanes with no glitches whatsoever. The rx is only 6 months old by I am guessing that it must be the problem, I am definately not going to trust it again. Anyone have any suggestions for me, before I put this once VERY reliable bird back in the air again? I really love flying helis but I just cannot afford to have this happen again. Thanks for the help, Dan.

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06-02-2010 03:30 AM  7 years agoPost 2
rbort

rrProfessor

Franklin, MA - USA

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Some thoughts

unexplained loss of tail control while practicing tic tocs
What did you do about this, just rebuild the heli? I would have at least changed the tail servo at this point.
I had what I thought was a swash linkage failure and a mid air boom strike.
I've had plenty of incidents with mine but never a midair boom strike. Not sure how that happened and what to advise here.
I had a glitch in the tail (just one 20 deg. twitch) followed by a total loss of control
This could have been caused by a low battery as you say total loss of control after the tail twitch. If it was just the tail I would suspect the tail servo again. In any case I do not recommend the 9253 or 9254 servos on gassers, in the past they have proven to overheat and are not reliable as seen by many folks here.

Rebuild it, and if for nothing else put in new electronics in it to minimize your chances of another crash. You need to make some change after the crash, as if you just rebuild and fly and it crashes again you can't eliminate one suspect. In other words, if after the first crash you replaced the tail servo, then on the 3rd crash you can say that the tail twitch was more likely not caused by the servo. If you didn't replace it then the servo might be acting up again.

Good luck and if you can have someone local look at it to make sure you're not missing something obvious.

-=>Raja.

MA 1005 H280, 4091 flts
Raptor 90 H300, 267 flts
Spectra 27 3DMax, 3173 flts
Whiplash V1 27 3DMax, 1360 flts
Whiplash V2 H300, 123 flts

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06-02-2010 03:57 AM  7 years agoPost 3
fixed3d

Senior Heliman

Whitefish, MT.

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I did replace the tail servo, the 9254 has two or three flights on it. The rx battery is only two months old and a low voltage alarm was used, it did and still does check out fine. Between the crashes everything was working great. All the electronics are less than six months old except the voltage reg. and Power Bus. I have had nitro and electric helis using this same TX with no problems. I think I will replace the Rx, voltage reg. and Power Bus. Another $400 and hopefully no more problems. I thought about some type of RF interference from the ignition system as well, but everything electronic is in the same location as all the previous normal flights.
Also, unfortunately, in our area, I am the "Local" heli guy.

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06-02-2010 06:04 AM  7 years agoPost 4
pgkevet

Key Veteran

Wales

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I've been there too..

Now got dual independant power supplies, dual switches, additional jewel generator, removed all y leads so a large rx to take three power supplies inwards. Relocated most of the wiring so hardly any extension leads required. Anywhere a wire goes around or through frame then there is a piece of fuel tank isolator rubber glued to the frame or foam lining. Any extensions have junction clips

I've only ever had 2 servos go unpredictably 'weak' on all my other helis (a ds620 on a 600 throttle after about a dozen flights and a tail servo on my 600e after about a year and dozens and dozens of flights and several crashes) But I had tail servos on both gassers lose feedback pots and the feedback pot on Spectra throttle -as reported by futaba service- on well under 200 flights.

I then added a preflight routine before each flight which included checking each battery for levels and power responss to running up the jewel on each separately before switching to dual power as well as a quick recentering check on each servo... check again in the hover, fly a circuit, pull a loop to check fuel flow works... before starting the flight as such.....

..and something new still gets me

pgk

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06-02-2010 06:46 AM  7 years agoPost 5
fixed3d

Senior Heliman

Whitefish, MT.

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Thanks for the tips. I don't feel so bad when pilot error is involved, but I havent had one of those for quite a while. I am very careful on my pre flights, checking servo travel and noises, making sure linkages and set screws are tight etc. and I fly very conservatively for the first 5 minutes. After that I typically go to my modest pattern of rolls flips and stall turns, everything was fine for about 5 more minutes and then.....

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06-02-2010 07:13 AM  7 years agoPost 6
chickens2252

Senior Heliman

Okinawa

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I had a lot of issues with my 450 with the tail and the ESC crashing me. I thought that it was the Rx for along time but it ended up needing ferrite rings.

I was fling at work and there is a lot of RF transmissions there. The Rx is so-posed to be immune (not totally immune but it shouldn't send false signals to the servos) to interference so it made me mad. After reading that the servo wires are sending standard PPM signals down the wires and that the wire can act as an antenna, I put ferrite rings on the longest servo wires. Problem solved. Maybe it is the length of the servo wires and your proximity to a source of interference.

With the boom strike, I had one on a small electric years ago. It was a ball link failure. I think is was my fault though. I think that I put the link on the ball the wrong way to get the tracking in and cracked the link end.

Any way good luck and don't let one bad string of events bring you down.

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06-02-2010 11:44 AM  7 years agoPost 7
Zman

Key Veteran

Florida

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Fix,

This is by all means no attempt to start a radio war but I have personally witnessed a fellow loose three aircraft due to spectrum 2.4 system. Call it brownout, reboot or whatever but batteries showed good before and after crashes and he still lost aircraft in mid flight. I am sure all systems have their faults (hence I am not singling out one mfg), I am just saying in my opinion, there are still some bugs in the spectrum/jr 2.4 system. Real problem is it seems hit or miss making it hard to prove or disprove. One guy never has a problem and the next guy does. I know some jet guys who are investigating static electricity problems on the JR stuff right now. I dont know if this is just relative to turbines or what. When I was using spectrum, I had a receiver always boot up but after a minute or so of flight the light would blink. I sent this receiver two times to horizon and both times they sent it back with a good report card. I finally just tossed it. As expensive as helis are to repair, especially MA, I would consider trying a new system, maybe even borrow one. Many guys have a couple transmitters and I am sure wouldnt mind you using it while you are trouble shooting. You can't crash a transmitter!
Just another idea but I really hope you find problem before it gets the best of you, this hobby is too fun to be having the bad luck you are having.

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06-02-2010 04:22 PM  7 years agoPost 8
fixed3d

Senior Heliman

Whitefish, MT.

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Well, a new AR 7100 receiver and an Align 2 in 1 are on their way. I guess if I have a problem after that I may try a different brand radio set. Futaba would probably be my next choice, but for the expense and trouble I really hope I don't have to switch. I really love flying helis and am looking forward to a summer with lots of flying (Hopefully).

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06-02-2010 05:01 PM  7 years agoPost 9
Zman

Key Veteran

Florida

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I hope you dont have to switch either, as I mentioned there are plenty of jr/spectrum guys with zero issues so who knows. If you lived closer, you could borrow my 10c and receiver for a few weekends just to rule out one possibility.

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06-02-2010 07:35 PM  7 years agoPost 10
fixed3d

Senior Heliman

Whitefish, MT.

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Thanks Zman, yeah the Montana to Florida commute would be kind of fun if I didnt have bills to pay . I'm getting tired of the last 3 weeks of rain and lower 50s, sun would be nice.

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06-02-2010 08:22 PM  7 years agoPost 11
rbort

rrProfessor

Franklin, MA - USA

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Montana

Why don't you go to the Minair funfly in Montana on July 9th, many top pilots will be there and I'm sure they can get you squared away with your 1005. I'm half thinking to go, but trouble it I can't get there easily with my gassers and I like to fly rather than watch!!!

-=>Raja.

MA 1005 H280, 4091 flts
Raptor 90 H300, 267 flts
Spectra 27 3DMax, 3173 flts
Whiplash V1 27 3DMax, 1360 flts
Whiplash V2 H300, 123 flts

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06-02-2010 08:30 PM  7 years agoPost 12
Zman

Key Veteran

Florida

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We have plenty of sun fix, let me know if you ever head down this way. We will show you some good ole southern hospitality (ie. fly fly fly)..

On a side note, if you start to think it may be radio, I can ups you my 10c and a receiver to help sort the problem. Just let me know.

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06-03-2010 06:03 AM  7 years agoPost 13
maabus03

Heliman

C.Falls,MT - USA

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Speaking of the other guy not having problems lol...I fly with him alot. I fly a vibe90 gasser using a AR6200 and dx7. We're the only heli guys at our local field. I've yet (knock on wood) had any issues with my receiver or dx7. Had the same rx on a trex500. Zero problems or glitches. Can't wait for the MA/heliproz funfly. We'll actually get to see some other heli flies for a change. Raja maybe you could mail your gasser to heliproz and they'd hold it for you?

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06-04-2010 06:47 AM  7 years agoPost 14
fixed3d

Senior Heliman

Whitefish, MT.

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Thanks for the generous offer Z, hopefully my glitch problems are over. I was in Miami about a year ago, picked up an RV off eBay, and drove it back here, would love to do it again someday, and have the time to enjoy it. The Heliproz funfly should be fun, as long as my chopper is in one piece by then.

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06-04-2010 11:29 AM  7 years agoPost 15
muley

Heliman

Hyannis, Ma USA

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If it makes you feel any better, I've had the same problem over the last 3 weeks or so. 4 crashes that I now believe were radio related. At first I supposed they were mechanical or maybe thumb related, but on the last 2 I actually had time to look at the sticks as the ship "hung" with no response. Checking conditions at the debris field was inconclusive - everything works fine on the ground. Then I noticed the screen went blank on my DX7, I had to turn it off then back on. I had considered rx, but all 6 of mine are recent replacements from Horizon; masking, but one of the ships was over a year old with no problems, and mechanical became more doubtful as I am not that haphazard about building/repairs. Last time was Monday on my first flight, luckily "only" my 50, and was another clear signal failure, actually had time to look at the sticks as the ship drifted down inverted. I spent the rest of the day flying my backyard beater 450 off to the side, hoping for failure so I could check the screen, with the Spectra and Fury sitting idle.

I've got a new tx plugged in now, the old one is going to Horizon as soon as I copy enough programs to keep my addiction going. For $230 I should have done it weeks ago, I spent that on the Spectra crash alone......Now I'm wondering if any of my other dirt naps over the last few months, there have been a few, could have been radio related.

but better times are coming.......

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06-04-2010 05:06 PM  7 years agoPost 16
fixed3d

Senior Heliman

Whitefish, MT.

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Just what I need, something else to think about being the problem! Hopefully my DX-7 is OK. All I can say for certain is I use it on all my other ships with no problems, hopefully it won't happen again to either of us.

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06-05-2010 04:58 AM  7 years agoPost 17
Justin Stuart (passed)

rrMaster

Plano, Texas

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Silly question, but is there any chance you hit the "bind" button on your TX accidentally?

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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06-06-2010 08:33 AM  7 years agoPost 18
fixed3d

Senior Heliman

Whitefish, MT.

My Posts: All  Forum  Topic

I always stay very clear of the bind button. Got her back in the air today with a new AR7100 rx, two satellites, and an Align 2 in 1 reg. So far so good except for a forced auto due to the engine cutting out after a throttle pump (was just too rich) and a broken motor mount screw. Two flights and no glitches or any thing strange. With fingers crossed and nerves on end, more flights tomorrow.

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06-06-2010 08:26 PM  7 years agoPost 19
fixed3d

Senior Heliman

Whitefish, MT.

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Well, four more flights today, with a total flying time of 40 minutes. No glitches, no problems, no drama . Hopefully the problem is solved .

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06-09-2010 06:34 AM  7 years agoPost 20
fixed3d

Senior Heliman

Whitefish, MT.

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Another 16 minute fight today, so far so good.

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