RAPTOR 90 TAIL PIN FIX

[xbrute]

Gday guys i am just having a problem understanding how to fix the tail gearbox pins that come loose on the stock tail of the rptr 90. Could someone post some pictures or diagrams to help please. Some suggest heat shrink tubing? Buggered if i know! Thanks for the help!!!!!!

[Ah Clem]

Xbrute,

Jim Lerch posted some excellent photographs a while back. The should be somewhere in this (Thunder Tiger) forum.

I used brass tubing, epoxied around the nylon gear to retain the pins. Some use heat shrink. The posts on various forums of one of the three pins backing out are legion. The results almost invariably ugly.

Great flying machine, by the way!

Try seaching this forum sir, and you should find it.

[xbrute]

Hi thanks for the reply, had a look at the whole forum but did not come across it. Anyone else know where i can find it?

[glover1482]

http://www.runryder.com/helicopter/t465325p1/

Fly safe, Glover

[Ah Clem]

glover,

Thank you for finding that.

I did a search of this forum after I posted yesterday (not wanting to leave him with a "just do a search" post) and could not find it.

[keithgr148]

hi there check out my post out on page 8 and you will find the post from Jim L and you will find what your looking for ok !! I also needed help on this tail problem when setting up my raptor 90 .

[xbrute]

Thanks guys you have been a great help!

[akz28]

Thanks to you guys I decided to take apart the tail on my Raptor 30 V2 and check on this pin. My Raptor is only a month or two old and has been flown probably about 10 times or so.

Sure enough, the pin was working its way out.

Thank goodness for these forums and this community!

I think I'll get some shrink wrap tomorrow and go that route to keep the pin in.

Thanks again everyone!!!!!!!!!!!!!!!!!!!!

[Helico-pteron]

All you need to do is hold the pin in some pliers and grind a small flat spot on the pin where the grub screw sits. Install it making sure the flat side faces the grub screw. Use thread lock to secure the grub screw. If the grub screw works loose and the pin moves it will wedge itself tight. against the grub screw stopping both the pin and the screw from working loose.

[reaaz]

There are THREE (3) places you NEED to add the pin sleeves in the Raptor 90

#1 Tail main shaft, bevel gear sleeve (make sure sleeve doesn't rub the tail case when you put it)
#2 Tail boom case, lower pinion gear sleeve
#3 Tail boom case, Upper bevel gear sleeve

I used brass tubing that was a tad smaller than the I.D. it needed to fit over & swelled it open to the correct i.d. on a 3/8" socket (its outer diameter happens to be the 12.3mm i need in a vice) & cut it to the length i needed. epoxy in place!

If you are using shrink wrap, use thick heat shrink tubing & maybe two heat shrinks.

Grind a flat on the pin will work, however if you grind to much and/or tighten to much you may snap pin at this new weak pin & your back to square one! Some folks have ground pin & added sleeves as well!

[Helico-pteron]

It just needs a small amount ground off to lock it in place, but the copper sleeve is a good idea.

[reaaz]

don't forget the copper sleeve should fit rather snug & also use a dab of epoxy to keep it from coming out

[james5705]

You also need a sleeve on the Metal Elevator Parallel Lever. I found out the hard way!

[reaaz]

James, This elevator sleeve your talking about, can you post a closeup pic? i'm not really sure of where you are talking about

[reaaz]

here's pic of brass sleeve fix used inside tail shaft casing

[james5705]

http://i248.photobucket.com/albums/g...ermgal/002.jpg

http://i248.photobucket.com/albums/g...mgal/003-2.jpg

This is what i was talking about Reeaz. I have a Raptor 90 SE. Im not sure if its different on the other raptors. But this is what mine looks like.