tail rotor shaft not 90o???

[miglis]

after assembling my 700 i discovered that my tail rotor is not perpendicular to the main shaft i think it is 80-85 degrees.
although i fitted the boom all the way in its place and locked also did the same with the tail box i am in this situation,
has anyone encountered this problem?
please help!!

[spdntckt]

I dont know why but my carbon boom was like this. When i put the aluminum boom on it was perfectly straight. i think some of the booms may have the slots cut slightly off 90deg. you may want to check that.

[Finless]

Align some times gets that alignment hole in the boom off... Seen many 700 like that. You have to file the hole oblong to fix it.

Bob

[miglis]

hi Bob! thank you for replying, the previous owner had no problems from that missalignment during flight (3d), i tried both carbon and metal booms but tail shaft is a litle off either way.
should i trust him and see results during flight or proceed with drilling?

[Tom Burgess]

This is a well known problem on th ecarbon boom. elongate the hole in the boom using a file, twist straight (tailcase at 90) and then pin the tail too :thumbup:

[zyklon]

You don't have to drill it. Just use a file or emerald paper to open up the "U" shape of the boom so that it can rotate a little in the boom mount casing.

[miglis]

what if i leave like this? my metal boom seems to be a little less off than the carbon boom, would there be any side effects during flight?

[Tom Burgess]

what if i leave like this? my metal boom seems to be a little less off than the carbon boom, would there be any side effects during flight?

I very much doubt it to be honest, unless you are Szabo standard you probably wouldnt notice it. :thumbup:

[miglis]

thank you a lot!!

[LoveMyTrex]

is pinning the boom on the 700 necessary?

[Tom Burgess]

is pinning the boom on the 700 necessary?

Neccesary? Who knows.

Worth it to not worry about it? Yes.

:cheers

[Mercuriell]

is pinning the boom on the 700 necessary?

Depends how fast you piro and how often you check your nuts :shock: - I think it is worthwhile on the CF boom as they always seems a little slippy even though they also seem a whisker oversize - on the ali boom I haven't bothered.

As fas as the tail rotor being a bit off perpendicular unless you're doing precision 3D you probably won't notice as your thumbs likely to introduce more variation than the angle - in theory it could produce changes in pitch with changes in HS as you are introducing a (tiny) vertical component to the thrust.

[miglis]

could not held myself and i did the drilling process at the rear end.
i stretched a little bit the hole downwards and voila!!! as soon as i fixed the two tailfin screws the tail shaft is now perpendicular.