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HelicopterGasser Model RC HelicoptersOther › Well...It happened again
12-28-2008 06:10 PM  8 years agoPost 1
Forced_Inductio

rrApprentice

Camrose, AB

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I planted my Spectra G AGAIN!!!! I was seriously considering putting up a listing and selling it this time, but im not going to give up on this bird. Im a firm believer that if your heli goes down, 99% of the time it was your (or my) fault. whether it be lack of maintenance, pilot error, whatever, and this time was no exception. My second flight of the day. both of them absolutely incredible. i love how this heli flies! But about 12 min into the second flight, and the heli started going crazy. I had a feeling i knew what happened. i almost gained control again before it went sideways into the ground. Servo wires pulled out of the reciever.

It seems like everything that can go wrong is with this heli. Im going to pull the electronics out of it, change the swash servos, and make myself a BULLETPROOF electronics setup. complete with shoe goo holding the servo wires together and everything! Im tired of little things costing so much money. The bolts holding the see saw in place even pulled the threads out, so now i need to replace the see saw as well.

On a happier note though, I finally got all the vibrations out, and the crash left the torque tube intact! so i dont think this one will be too bad.

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12-28-2008 07:55 PM  8 years agoPost 2
litespeed600

rrKey Veteran

St. Charles,​Missouri

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I've had 3 crashes on my Predator, one was a bad servo and I thought it was a broken ball link and the second crash was finding out the tail servo was bad. Third flight was from the tail pitch slider bolt falling out...yes falling out during flight whilst tracking down a tail vib. I just kept a stiff upper lip, spent the cash and wrote it off as bad luck. My Predator flys just incredible too and for 15 to 20 mins at a time.

Live and learn and just know it could have been worse.....it can always be worse!

Tom

Married with 2 kids, I am no stranger to pain!

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12-28-2008 08:16 PM  8 years agoPost 3
pgkevet

rrKey Veteran

Wales

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I suppose that still leaves me ahead with a total of 3 crashes each this year on Preddie and Speckie .. and mostly also for 'silly' reasons including one epsiode of a servo plug coming loose.. which with hindsight was my own fault for obviously not shiving it back in properly when I borrowed that channel to benchtest a different servo.

A wiser pilot than I did make the point hat all crashes are down to pilot error - either in flying or maintenance or anticipation. But some things just seem unfair... throttle linkage popping off on the third flight of a day while inverted for instance.. or being hit by a plank.

Sadly if we spend endless time rechecking then there's never time to fly!

Flying these birds needs either a deep chequebook, starting with the skills I'm only learning or only flying like a pussy..

..personally I've learned to accept that if i want to have fun with them there there will be costs. I've been pussy-flying the last few weeks and had enough of that.. next day of good weather and what the hey!!.. time to go chuck it about with the old complacency

pgk

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12-28-2008 10:28 PM  8 years agoPost 4
Forced_Inductio

rrApprentice

Camrose, AB

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well, im tired of chasing down problems. i think im starting to get the hang of this heli as far as maintenance though. how to chase down problems, ect. ive been using cheap servos (5625MGs) for a while and thats going to change as well. I just cant wait to fly this heli again! its incredible.

Anyone out there using the factory tank? Im having nose heavy problems and with the fuel tank under the reciever tray, its not helping at all. what can i expect for flight times?

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12-28-2008 11:04 PM  8 years agoPost 5
predatorman

rrVeteran

Falkland Islands

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I feel your pain.

Thankfully I pull the collective right down when I know its going to crash...so havent had too big a repair bill yet...touch wood!

One crash was due to a popped linkage...heli did some nice rolls and in she went.

Last crash was due to getting my orientation wrong at low level.

So yeah, I know the pain. On average a crash will cost me around £250 sterling, but I dont crash as a habit so its not too bad. The biggest problem is getting grounded due to not having a part that I need.
As a result I tend to get a heap of parts in at one go, its still cheaper to buy from the USA rather than the UK which is where I usually get bits and pieces.
I live and work in the Falkland Islands, so figure on a few weeks wait to get parts.

Maintenance? well I go over the heli after flying and havent found too many problems but I dont fly 3D or anything like that...bet that must punish a heli.

Rob

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12-28-2008 11:29 PM  8 years agoPost 6
smallplanes

rrElite Veteran

S.C. ,SSA

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5625 servos are not junk,,i have two 50's and a lot of planes with a lot of flights on them and never had one to fail. My new gasser i'm putting 5965mg servos in. I do feel you guys pain i have the worst luck of anyone i know,,but i still keep going. Hope you get your problems worked out.

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12-29-2008 12:40 AM  8 years agoPost 7
bosshoss

rrVeteran

Chicago, IL

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Forced!!!!! this sucks, man.

You got the right attitude, I hope it was'nt too terribly damaged.

I use a Du-Bro 16oz like the majority of us, and the heli balances near perfect with a half tank. Tank mounted just like Raja's in Raja's gallery, cylinder facing rear.

You know how much you love an aircraft when it is crashed and before you even walk up to it, you are saying....it will fly again.

Check them shafts, and scrutinize it all.

Good luck.

Why Hover a Yak, when a Heli does it better?

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12-29-2008 01:17 AM  8 years agoPost 8
predatorman

rrVeteran

Falkland Islands

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The worst crashes I ever had were from RF problems with my Trex 450 using an FM radio...what a pain in the butt that was...would be flying about all ok and then glitch after glitch...tried pretty much everything to get rid of the problem but settled for a new 2.4ghz version of the radio I was using...not a glitch since.

The good thing about a prang is that you can get to sort out all those niggles that you might have been putting off for another time.

Rob

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12-29-2008 02:35 AM  8 years agoPost 9
Fixit

rrElite Veteran

UK

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I suppose that still leaves me ahead with a total of 3 crashes each this year on Preddie and Speckie:
Well I'm trying

I’ve been having a crash every week for the last three weeks with my Raptor 90 Gasser, last week I lost control and it just gathered momentum and took off, luckily for me it flew into some trees and came down otherwise it could have gone anywhere as it had a full tank at the time (30 minutes worth). I found out later the throttle servo was on its way out so I changed it.
This week the heil just went into nose in inverted while in a 5ft hover and came down head first, that’s 3 sets of blades plus all the other parts in three weeks and I'm starting to think this hobby isn’t for me this time it turned out to be the elevator servo that had packed up so I’ve renewed all the servos and changed it over to 2.4 and so far its fine.
I guess with the gassers you can’t afford to take any chances with cheep or used servos like I did with this heli.

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12-29-2008 03:19 AM  8 years agoPost 10
Forced_Inductio

rrApprentice

Camrose, AB

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5625MGs were perfect for the 50 when i wasd starting out with that size of heli, but they have no centering power (compared to the 7565MGs that replaced them), and low torque. they dont belong on a 90 sized heli, and they have many many flights and a few crashes on them already.

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12-29-2008 03:45 AM  8 years agoPost 11
Excalibur

rrKey Veteran

Destination: Earth

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Hi F.I.

Sorry to hear about your run of bad luck - it seems to happen to all of us sooner or later. But you have the right attitude to get back up on that horse and ride it.

A few things I've learned the hard way that may help. . .

1. ALWAYS tape the crystal into the receiver.

2. Lay a piece of tape across the entire row of servo connectors that are plugged into the receiver to prevent them from pulling out.

3. ALWAYS wrap the Rx in foam and secure it to the frames with Velcro. Same with your battery packs.

4. Cover the first few inches of an antenna with heat-shrink tubing and be careful where you route it to prevent chaffing.

5. Never let a servo hang from it's electrical lead, especially when you are repairing something and have the frames separated.

6. Never leave an unprotected servo lead laying across the edge or corner of ANYTHING. If necessary, round the sharp edge with a file.

7. Locktite EVERYTHING, including the little tiny-ass screws typically found in the flybar or tail assembly.

Beyond these simple building steps the MOST IMPORTANT thing you can do is get in the habit of a full pre-flight and post-flight inspection every time you fly. You'd be surprised how much you can find by genty tugging, pushing, and observing wires, servos, ball joints, mechanical assemblies, etc.

Good luck with your rebuild and keep us posted.

Xcal

Camper Fuel: It's Not Just for Breakfast Anymore

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12-29-2008 07:50 AM  8 years agoPost 12
Forced_Inductio

rrApprentice

Camrose, AB

My Posts: All  Forum  Topic

I think number 8 was the root cause of this. ive grown complacent with my 600N. almost no problems (other than the control system slop developing ) in well over 100 flights now, and i think this has carried over to this heli. i have to get out of this habit!

PS, i learned today that the fuel tank doesnt fit inside the canopy with a rear facing engine. A note for anyone else going to attemp the same.

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12-29-2008 11:44 AM  8 years agoPost 13
j.8

rrVeteran

Denmark

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Hi Forced

"PS, i learned today that the fuel tank doesnt fit inside the canopy with a rear facing engine. A note for anyone else going to attemp the same."

I don`t understand the exact meaning

Regards Bo

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12-29-2008 12:41 PM  8 years agoPost 14
shawmcky

rrElite Veteran

Isle of Wight,United​Kingdom

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Best Servos

I try and make a habit of using the best servos i can afford now,i have used new servos of the cheaper(ball raced,High Torque)variety and none have turned out to be the "bargain" they appeared to be ,luckily i have always managed to spot the dodgy servo before it packed up completely.Gassers sure throw up poor quality components.I put elastic bands around Rx connectors and no tight wire runs.Like most guys here you have to be on top of the game and be on the look out for that tell tale glitch.A lot of luck is also handy

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12-29-2008 12:48 PM  8 years agoPost 15
predatorman

rrVeteran

Falkland Islands

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Ah, complacency! well we can all get that way inclined. It doesnt hurt to go over the heli at least every few flights with a 'fine toothed comb' approach.
The basic checks MUST include the drivetrain, servo arms and links...flybar assy and mixing levers and so on..its better on an afterflight as you then have the time to fix things and avoid the 'it will do for now' attitude.

The electrical side needs care, on installation its easy to make up some protective standoffs for cables and so on...spiral wrap and soft silicone tubing and cable ties, preferably the reusable kind should be part of your toolbox. Its never worth skimping on the 'lifelines' of your heli..or plane for that matter.

This is aimed for the newcomer to the hobbie by the way

oh, and dont forget to set the failsafe! I know an unplugged battery can cause a flyaway...or an unplugged servo lead could cause mayhem...but standing in a court of law and being asked the failsafe question could be bad. At the end of the day a pilot of an RC heli/plane comes under the Air Navigation Order....in the UK anyway...check the FAA and you will most likely find the same deal.

Basically, its an offence to take to the skies with a model that you know to be defective. Its a harsh reality when a model does hit something it shouldnt....happened here once with a 5 kg plastic plane...battery was bad...pilot was slapdash...no failsafe...plane went over town...came down full throttle...went through a 6''x1'' plank...shattered clean in two. Luckily it wasnt someones head...or a child...child in a pram..you get the picture.

This is not a 'holier than thou' thing of mine, but that actual pilot of the plane would NOT accept the Air Navigation Order rules...was darn lucky not to have been taken to task...the owner of that fence was non other than the senior pilot of the local air service.

It came down to responsibility, the pilot of the rc model thought it a joke...needless to say I took him to task...he doesnt fly anymore...not around here...which is a shame but for the sake of pride.

Rob

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12-29-2008 01:54 PM  8 years agoPost 16
bosshoss

rrVeteran

Chicago, IL

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Pre-Flight Anti-Social Tendencies

I am known as the Pre-flight Anti-Social at my field, and it has caught on.

During my Pre-Flight, I speak to no one, BS with no one, and tell most to go away unitl I am done.

My buds also run interfernece for me, and I for them as well, during Pre-Flight. If someone is walking-upand Yakking a question....the hand goes up in the STOP position.

If my buds head is in his plank or checking surfaces, and a Yak-walker is walking up them, I stop them.

Pre-Flight is everything, period.

We have "slapdashers" (love the Brit term), here as well. And we run them out, if they don't shape up.

"this little bit can;t hurt anyone..." is their inane refrain.

How wrong they are. I have seen a 9 x6 slow-flyer prop plane almost take a man's life. How wrong they are.

Getting back to F.I.'s plight, yup, Anal retentive setup, is the order of the day. I think I have a mile of spiral wrap, a yard of velcro, a tube of Goop, and roll of tape in my Spectra!!!!

Forced, the Du-bro tank 16oz will fit under the tray in the canopy. perfectly. The stocker is for the bin. Look at Raja's gallery.

Why Hover a Yak, when a Heli does it better?

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12-29-2008 02:35 PM  8 years agoPost 17
predatorman

rrVeteran

Falkland Islands

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Yes, its all fun and games till someone gets hurt.

Quite some time back there was a flurry of activity when everyone had an RC plane and wanted to fly at once...it was mayhem and downright dangerous...because not only the flyers were there but also wives/girlfriends/kids were on site too.

Luckily no one got hurt, though watching peoples planes coming out of the sky due to radio 'shootdowns' did happen...usually with the newcomers grabby sticky little fingers switching thier radio on without checking who was on what channel.

The fad passed long ago so things are much safer now, the low flypast beat up artists have long since got bored and have given up flying....and thats a valid point...its the reckless that can easily ruin the hobby...not the bonefide flyer so much.

Its a good idea to join a Club, where not only safety is upheld but good maintenance is encouraged.

Rob

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12-29-2008 04:47 PM  8 years agoPost 18
Forced_Inductio

rrApprentice

Camrose, AB

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J.8

I was trying to put the stock fuel tank right in front of the engine with a rear facing engine. the fuel tank is too wide to fit inside the canopy. the heli is really nose heavy, and with the tank that far in front of the mainshaft, its not helping at all. Ive learned that its probably the best setup though. Im gonna keep using the dubro tank.

Thanks for all the words guys. A while back i almost laminated a checklist i wrote up. i might get around to finishing that. it would be a good idea to have something to follow.

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12-29-2008 05:36 PM  8 years agoPost 19
predatorman

rrVeteran

Falkland Islands

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Good idea about the checklist, something I always like to check is that the failsafe works.
For some reason my older radio, a Futaba T7CP, would have the failsafe setup but would fail the test...unless the power was recycled.

A good 'full and free' check of the swash and tail rotor system is a must...which I am sure you do check I got caught out once with a Gyro that crapped out on me...went to lift off (Trex 450 XL HDE) and the heli went mad before biting the ground.

So a quick swing of the nose to check the gyro is there and not daydreaming is a good idea.

Rob

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12-29-2008 07:12 PM  8 years agoPost 20
Forced_Inductio

rrApprentice

Camrose, AB

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Im a private fixed wing pilot, and we use checklists for everything. its a nuisance at the beginning, but you get used to it. even after 100hrs of flying, ill still catch something small that could have been problematic (like carb heat on takeoff, not good lol). they become second nature after a while.

I think thats what im going to work on. A checklist.

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