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HomeAircraftHelicopterMain Discussion › Love my Raptors, but...
04-30-2010 12:12 PM  8 years agoPost 1
Diego

rrApprentice

Oviedo or Cartagena, Spain

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I´ve got two Raptors, both 50 V2´s when i got them they were 30V1´s they´ve been forever with me and really love them, it´s been cost effective, two machines same model with very little differences.

I was doing some flips and inverted the other day and when i came in close to check the fuel i noticed a vibration, more like a wobble that was not there when i took off, You know, the one you get at the first flight of the day when you eyeball the position of the blades so when you spool up it shakes until the blades reach the right position relative to the head. it was doing this while in flight.

Landed, checked the obvious, links, screws, bolts, play here and there and balance, everything was ok. Spool it up again, it shakes but it won´t stop, shut it down take it home and start taking the head apart replace everything, actually i just built a new head i get to the point where i find nothing wrong with it so i go to the main bearings.

I hate to split the frames and remove the gyro tape to check the main shaft bearings, no wonder they are all notchy and full of crap, grease them but they are gone. Hell, i thin i spent less time getting the new head back together than removing and replacing that gyro tape crap.

Now i´m really considering moving to a a model that does not need such extensive disassembly to get to the bearings, of course this does not mean that i will check them more often, but at least i´ll get pissed at something else.

I´ll see tomorrow if all my efforts removed the shakes.
So here are the questions:
1. could the bearings be the reason for that type of shake?
2. Is there a model that fits my needs? cheap as a 50V2 to repair, bearings removable with out all that hassle.
3. Is there life in other planets?

Thanks,

Diego

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04-30-2010 12:19 PM  8 years agoPost 2
z11355

rrMaster

New England

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Lots of very good 50 size machines in the market these days. I personally am a fan of the Hirobo's and Outrage.

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04-30-2010 01:08 PM  8 years agoPost 3
Rotowerkz

rrApprentice

Windham, NH

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I have a 30V2 that I'm also on the fence with. It flies great, but the crashes are much more spendy than those with my Trex 600 ESP if you use TT parts (I use Mavrikk parts when possible). The parts for the 600 are so much cheaper. I may upgrade to the 50V2 to see how well it compares, since I have a Hyper 50 laying around; I may end up selling it after that since TT is way too proud of their spare parts.

Do you notice any lateral play in the main shaft, when you turn the head?

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04-30-2010 01:41 PM  8 years agoPost 4
luz_husband

rrApprentice

Nancy, Kentucky

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have you replaced your head dampers? I had a similar shake in mine that just didn't want to go away, I finaly got advice on here to change the dampers and it is perfect now.

I have a Frenzy 50 now and love it(199.00 new kit price).

Impacting the earth one heli at a time

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04-30-2010 02:27 PM  8 years agoPost 5
ChrisMoore

rrApprentice

Bay Village, OH

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well put Diego. I ran into the same thing when I did some maintence in my Raptor. those frames did NOT want to come apart. I used thick CA on the screws into the plastic frame posts...NOT fun to take apart. I would love to be able to just remove a bearing block or two, that would be amazing.

Chris. AMA 497715 IRCHA 3351

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04-30-2010 02:44 PM  8 years agoPost 6
Aaron29

rrProfessor

USA

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I don't suppose it would be too hard to manufacture a plate like Hirobo uses that can be removed and thus not have to go through the gyro tape removal to split the frames.

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04-30-2010 03:46 PM  8 years agoPost 7
Diego

rrApprentice

Oviedo or Cartagena, Spain

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I replaced the dampeners in the new head i built, i will take both heads to the field and try them out while replacing stuff, that will be a nice experiment.

I first suspected The dampeners, they "seemed" softer the the new ones, but i could be wrong, they are the blue TT ones not OEM dampeners, of course i will use other brands when available mavrikk, klone rc etc.

How long should these dampeners last? they are not very old, maybe 6 or 7 gallons between both my machines. Well, maybe that is too much and i´ve actually been lucky with them, i don´t know.

Maybe a base screwed where the gyro goes, but i did not want to introduce another item to troubleshoot if needed.

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04-30-2010 03:53 PM  8 years agoPost 8
budz

rrApprentice

las vegas

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easy bearing replacement
while the frame is split up, you can grind the upper lip of the top bearing block and the lower lip of the lower bearing block. this will make it easier for the bearing to slide out when you need to replace them. the upper bearing will be held in place by the main shaft colloar will the lower one by the main gear.

team solo

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04-30-2010 03:59 PM  8 years agoPost 9
PJRono

rrKey Veteran

Minnesota, Ya!

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^^^+1^^^ Remove the top lip of the top bearing and the lower lip of the bottom bearing. No more splitting the frames. Also do the same thing for the start/clutch shaft.

If your headspeed dropped while doing the flip stiff dampeners will cause a wobble too.

If you skip me I can't play!

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04-30-2010 10:22 PM  8 years agoPost 10
TankDirt

rrKey Veteran

Illinois

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If your considering a different heli just because you think a few areas are bad mantinance wise..then DONT! The raptors are some of the easiest helis to work on..Very low parts count..And the amount of screws holding other helis together will make you sick when you have to change something in the frames-or the frames. You simply cannot beat the simplicity of a raptor, and as old as they are they still outfly most anything out there, including the 600..But you need to get the Titan SE parts.

As some other mentioned just grind alittle on the frames and you wont need to split the frames to check/change bearrings.

It sounds to me like your trying to find an excuse to change helis, thats why everyone left the raptors anyways they just got tired of having the same heli day after day season after season..They wanted something new. Dont get me wrong, if you want to change by all means go for it..I love trying out new helis!

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05-01-2010 12:46 AM  8 years agoPost 11
w8qz

rrVeteran

Grand Rapids, MI - USA

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I've got a cheaper solution to your problem.
I mounted my gyro (a 401) on a small rectangle of scrap printed circuit material (using the foam tape, of course). I drilled (4) holes in the mounting area, and have 4 holes in the corners of the PCB rectangle. I used some extra raptor screws, just into the plastic heli frame - voila, removable gyro, without having to re-do the tape. Been working great for me for several years. I probably should upload a picture.

"The helicopter is much easier to design than the aeroplane, but is worthless when done."

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05-01-2010 01:15 AM  8 years agoPost 12
Diego

rrApprentice

Oviedo or Cartagena, Spain

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I like that idea about dremelling the lips, too late now but i will test it next time around.
It sounds to me like your trying to find an excuse to change helis
I´m not tired of the raptor, i was just pissed at the trouble it gave me.
If your headspeed dropped while doing the flip stiff dampeners will cause a wobble too
The wobble continued for the rest of the flight, it was not a low headspeed issue.

I think that i might have located the problem, the collective control pitch arm was split at the back where the elevator lever is inserted, right on the thinnest part of the plastic circle, no way i could´ve seen that without taking it all apart.

The SE parts will have to wait until i go through my spares stock...

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05-01-2010 04:41 AM  8 years agoPost 13
jschenck

rrProfessor

La Vista, NE.

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@w8zq - "Wow, THAT's a GREAT IDEA!"

Watch at YouTube

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