How to tell if a main shaft is bent or not

[David Drew]

If it's only a slight movement it may be ok. I've had one in a 450 for some time and it flies ok.

Like peeps have said, it's often easier to hear it rather than see it.

[Mike Sanders]

How to murder your wife. If I recall correctly.

Jack Lemmon and Walter Matthau.

[Md001]

Mate the sound thing i guess will work for me since i am able to hear some different rolling sound, its just that i dont have a good shaft on me so not really sure what the perfect rolling sound is but i can surely hear some different sounds..but am working on it looks like its gonna take a bit of time..

cheers.
md

ones thats bent youll have to keep pushing a straight one will roll you can also hear it, if its bent the sound changes where a straight shaft makes a constant rolling sound.

Geez explaining a sound is not easy. hope it makes sense lol

[Md001]

If its really bad it won't roll Just try it and you'll find its pretty obvious if its bent.

the standard stock shaft which is major suspect of being bent is making an inconsistent noise..and needs pushing i am 90% sure its bent

the other 2 main shafts are brand new......but i hammered them yesterday... both of them has similar movement.....more constant rolling noise than the stock one and needs slight pushing

So now i just have to do it 1000 times more to feel the sound and movement in order to come to a conclusion.

regards.
md

[David Drew]

What heli?

[Md001]

Mini Titan e325 not the best one but still gives me a lot of pain

What heli?

[tonystevens]

Be careful you don't mistake the sound that the bolt holes in the shaft make as they pass over the glass for a bent shaft.

[Md001]

Nah nah mate sorry but sounds complex....not familiar with v bar and dial test stuff....i am going to try the flat surface rolling sound technique for now.

the other more expensive option is to use a pair of V blocks and a dial test indicator
but the simple way is to roll it on a sheet of glass (or known flat surface)
when rolling watch the shaft if the one end or middle lifts then its bent
if rolling on a dark surface watch to see if any light appears under the shaft when rolling it, if it does its bent

[pgkevet]

If it's only a slight movement it may be ok. I've had one in a 450 for some time and it flies ok.

Like peeps have said, it's often easier to hear it rather than see it.

Finger tips are very sensitive ..so even better to feel it as it rolls... HOWEVER some of the 450 size shafts get a bit flattened where the jesus holes are and may clatter there. Can avoid that by rolling on a narrow sheet so the holes aren;t involved.

I generally use a tile or the wife's ceramic hob top

[pgkevet]

Be careful you don't mistake the sound that the bolt holes in the shaft make as they pass over the glass for a bent shaft.

snap!!

[helijohn]

guys you need to explain how a bent one is going to roll compared to a good one!

It's a bit like rolling a die compared to a ball bearing.

[Md001]

Guys with the flat glass surface in front of me along with main shafts and keeping all other points in mind....i feel i am right in this position

tony-montana-11.jpg

this heli is surely not an easy piece of work!!!!

[pgkevet]

There was a guy on desert isand discs (years ago) who was asked what he would like as his luxury item "Two hookers and an eight-ball" apparently wasn't BBC stuff..

[tonystevens]

prob best to just buy a new shaft then if your unsure lol

[helijohn]

Guys with the flat glass surface in front of me along with main shafts and keeping all other points in mind....i feel i am right at his position

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this heli is surely not an easy piece of work!!!!

None of them is and the smaller the tougher IMHO.