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Old 01-19-2008 | 03:37 PM
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Default crashed ***?

ok so today i was flying my 450S in the living room, just normal hovering. i get it to about 2 or 3 feet and all of a sudden the nose goes left 90 degrees, i try to correct, then all of a sudden the heli dropped to the ground and started spinning, i broke some parts, tail boom, tail case, flybar, blade grips, landings skids, some flybar seesaw crap. i have a dx7 radio and futaba 9650, and 401 with jr ds285 cyclic. what couldve gone wrong?
Old 01-19-2008 | 03:47 PM
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Default RE: crashed ****?

sounds like something binded in the tail rotor; that's all the help i can give You Butters. Maybe the belt tension was too loose and it came off the pulley? Too tight and it binded? I don't know.

Living Room, huh. Now I feel better (I'm not brave enough to admit hovering in the living room).

Gary
Old 01-19-2008 | 04:01 PM
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Default RE: crashed ****?

maybe your tail servo went bad. might be a good idea to check it.
Old 01-19-2008 | 06:08 PM
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Default RE: crashed ****?

Also might not be a great idea to fly in the living room, as you saw things can go wrong that aren't necessarily your fault, better safe than sorry I always say.
Old 01-19-2008 | 08:03 PM
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Default RE: crashed ****?

yeah just like what goldslinger said, sounds like somethin with the tail belt either bound up or came loose. ...or maybe somethin with the main gear?? that just happend on mine!
Old 01-19-2008 | 08:15 PM
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Default RE: crashed ****?

now tat i think of it, it was kinda loose after i added this oil thing for the belt. but i wonder why it would just drop down so fast. anyways i was using the PRO carbon black blades, i thoguht they were carbon fiber, guess not, itBENT the boom. im gonna use the wooden ones from now on.
Old 01-19-2008 | 08:30 PM
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Default RE: crashed ****?

This happen to me (outside ;-) ) about a week ago. I'm sure it was a glitch. I think it might of been static build-up, I lubed the belt and it's been fine since....
Old 01-19-2008 | 08:35 PM
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Default RE: crashed ****?

glitch on the dx7? i lubed the belt too. would a loose belt cause the heli to first rotate then drop?
Old 01-19-2008 | 09:18 PM
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Default RE: crashed ****?

I wouldnt have thought so, a belt that has bound would.
Old 01-19-2008 | 11:18 PM
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Default RE: crashed ****?

I purposely get the belt just a TOUCH too tight when new and after a couple of flights, it settles to the right tension. It shouldn't loosen up after that because of the fibers in the rubber.

BTW, I too just had the belt climb on the Port collar in the tail earlier today; I thought the battery was going dead.

That's when I noticed I could barely turn the rotor and noticed the belt was on the Port collar; and I saw some fraying on the outer edge of the belt. Probably wouldn't have done any harm, but replaced it anyway; and I yanked the idler pulley off as so many suggest here while I was at it.

I guess that's one thing Align didn't address in the new addition. There's not enough 'slap' to need an idler pulley anyway, IMO.

Look at Me, I'm talking like I'm a Vet or something.

Gary
Old 01-19-2008 | 11:28 PM
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Default RE: crashed ****?

heh thanks!
Old 01-19-2008 | 11:35 PM
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Default RE: crashed ****?

I've had this happen a few times. Tracked it down to loose belt pulleys on the shaft.
Old 01-19-2008 | 11:44 PM
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Default RE: crashed ****?

which pulley? the one on the tail case side or the frame side? anyways its at the LHS, i need a new boom, flybar, feathering shaft, probably main shaft, tail case, blade grips, and some linkages on the head, i think overall itll cost about $80 with tax =/. at least ill have some spares.
Old 01-20-2008 | 12:28 AM
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Default RE: crashed ****?

LOL Gary, I hear ya! Until my crash today, mine was acting fine after ditching the idler pulley. But I do believe my boom was bent....uhmm....that didn't sound good lol!

Now I can't get it working right after replacing everything I thought was bent....

Skarn


ORIGINAL: goldslinger

I purposely get the belt just a TOUCH too tight when new and after a couple of flights, it settles to the right tension. It shouldn't loosen up after that because of the fibers in the rubber.

BTW, I too just had the belt climb on the Port collar in the tail earlier today; I thought the battery was going dead.

That's when I noticed I could barely turn the rotor and noticed the belt was on the Port collar; and I saw some fraying on the outer edge of the belt. Probably wouldn't have done any harm, but replaced it anyway; and I yanked the idler pulley off as so many suggest here while I was at it.

I guess that's one thing Align didn't address in the new addition. There's not enough 'slap' to need an idler pulley anyway, IMO.

Look at Me, I'm talking like I'm a Vet or something.

Gary
Old 01-20-2008 | 12:54 AM
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Default RE: crashed ****?

so i should remove the idler pulley?
Old 01-20-2008 | 01:17 AM
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Default RE: crashed ****?

I was reading on another board about static build-up maybe affecting it. Can't verify it, but have not ha problem since I lubed it....


ORIGINAL: butters149

glitch on the dx7? i lubed the belt too. would a loose belt cause the heli to first rotate then drop?
Old 01-20-2008 | 10:22 AM
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Default RE: crashed ****?

There as been some posts about applying oil or something to the tail belt and I think more of the researched done showed that is better not to apply anything to the belt.... In my experience, I have had 140 flies, not need to use the oil and no problem at all with the tail belt so far, just my 2cts.
Old 01-20-2008 | 03:58 PM
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Default RE: crashed ****?

I have had both the drive pulley and tail shaft pulley loosen up. These were the plastic ones, I have now upgraded to the Micro Heli pullies.
Old 01-20-2008 | 04:25 PM
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Default RE: crashed ****?

i dont knwo what you're tlakin bout still lol. so my question is, should i upgrade to metal or stick with plastic? parts for stock parts are about $80.
Old 01-20-2008 | 04:46 PM
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Default RE: crashed ****?

nevermind, the LHS put the heli back together, he told me that my back servo ds285 burned out, the elevator one, i wonder how it burned out? maybe that caused my heli to crash.
Old 01-20-2008 | 06:17 PM
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Default RE: crashed ****?

Majority of T-Rex fliers use the HS65MG servos. I don't know of anyone that uses the DS285 servos. Those must be the ones that came with your Spektrum system?
Old 01-20-2008 | 08:15 PM
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Default RE: crashed ****?

i bought it used, just thoguht they would be good servos, digital and all.
Old 01-20-2008 | 10:48 PM
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Default RE: crashed ****?

If you are a beginner flier then they will be fine. Servos on the swash do take a lot of stress and can easily strip gears and burn out in a crash if they are suddenly over loaded.
Old 01-20-2008 | 11:16 PM
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Default RE: crashed ****?

My Gosh, Butters!

Were there flames in that crash?

Can't wait to hear some good news about a full battery pack hover or something.

It will happen, My Friend.

BTW, ran 6 packs through the heli after pulling the idler pulley, and no tail incident; so maybe that was the problem; or too loose; I don't know.

I know alot of people have removed theirs. Mine's none the worse for it.

Gary
Old 01-20-2008 | 11:21 PM
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Default RE: crashed ****?

ok i will show the LHS the video of the tail mod tomorrow haha, is this only for the SE V2 metal tail or can it be done on the plastic 450S tail also?


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