I think I may try two of these: http://www.fastenal.com/web/products/detail.ex?sku=0134596 Cross drill the socket head and safety-wire it to the blade holder.


Not that I’m paranoid or anything…


Randy

Originally Posted by Helohead

I think I may try two of these: http://www.fastenal.com/web/products/detail.ex?sku=0134596 Cross drill the socket head and safety-wire it to the blade holder.


Not that I’m paranoid or anything…


Randy

I don't know. It could be that what we are using is equivalent to this or maybe even better if it is Align. I'm not a structural engineer or expert on this kind of thing but it could be that higher tensil strength might work against you. Less tensil strength and the bolt bends. More tensil strength and the bolt snaps.

I think your best bet is going to be pre and post flight check the blade grips for excess movement. Also, watch the heli for unusual wobbles. When I see something strange I land and inspect when I get the opportunity. Before the blades removed themselves, the heli went into a new and different wobble but didn't give a lot of notice before everything came apart. That's the problem, you don't get a lot of warning some times. Of course, not using thread lock was a major contributing factor!

Here is something I came up with I posted on a different thread.

https://www.rcgroups.com/forums/show...postcount=1851

The way I wired the battery contacts requires plugging the battery in then installing the canopy over all that. The power plug allows me to plug the battery in, install the canopy, then insert the power plug to turn it on when I get good and ready.

Also, here is a link to my inspiration.

http://www.rcaccessory.com/AS1-K12.aspx

I may buy one of these to install on my MD500 fuselage for my HK-600 when I get to that some day.

Originally Posted by navigator2011

I know it's not recommended, but if the rotor head is working correctly, there is no looseness anywhere or notchiness of the bearings, etc., then I'm not going to disassemble it. I have a Walkera V400D02 with a very similar rotor head to the Trex, and I've been running that head for tons and tons of flights without any issues.

You know, I have a V400D02 also and have experienced zero difficulties with the blade grips so far. The best I recall, Walkera doesn't use the three part thrust bearings which need periodic inspection.

I've owned and flown the V400 for about 18 months. Of course I've had the usual servo and brushed motor problems. Servos aren't a problem any more after replacement with MG servos. So far about all I do is hover off my drive way. Some day soon I will graduate to wide open spaces and practice flying "circuits." If that means flying circles and eights then that is what I plan to do eventually. Obviously I'm not in a hurry because I hate crashing my heli. I still need a lot of practice flying head in so I don't get disoriented when I make a turn.

Originally Posted by Helohead

I think I may try two of these: http://www.fastenal.com/web/products/detail.ex?sku=0134596 Cross drill the socket head and safety-wire it to the blade holder.


Not that I’m paranoid or anything…


Randy

Usually, I replaced Align screws /w the set from rcscrewz and use loctite 243. 243 can be applied to slight oily surface as you may have to put some wax or grease on rcscrewz screw thread for new screws going into new or hard material.

Originally Posted by wlee1017

Usually, I replaced Align screws /w the set from rcscrewz and use loctite 243. 243 can be applied to slight oily surface as you may have to put some wax or grease on rcscrewz screw thread for new screws going into new or hard material.

http://www.rcscrewz.com/product_info...oducts_id/2280

This is amazing! These hobby web sites seem endless. I doubt this would be a problem using SS on the Trex 450, but I have had SS bolts gald to SS nuts but they were outside and much much larger (half inch) than what we are discussing here.

Originally Posted by ChopperJack

http://www.rcscrewz.com/product_info...oducts_id/2280

This is amazing! These hobby web sites seem endless. I doubt this would be a problem using SS on the Trex 450, but I have had SS bolts gald to SS nuts but they were outside and much much larger (half inch) than what we are discussing here.

I used rcscrewz for my Trex-700, 600, 550 and 450. As I remembered, for 450 screw kit, there are 2 fasteners cannot be used due to cap size clearance. There are also 4 fasteners length too long and I have to cut them down. It's due to Align use non-standard length fasteners. BTW, it's no big deal as these issues come across in the building process.

New helicopter and I'm already upgrading. I read a review of this on page 13 of the June/July 2012 Heli Pilot magazine. There is no telling what I've gotten myself into.

http://www.aligntrexstore.com/450DFC...62_p_1991.html

Originally Posted by ChopperJack

I don't know. It could be that what we are using is equivalent ...

I think your best bet is going to be pre and post flight check the blade grips for excess movement. ... Of course, not using thread lock was a major contributing factor!

If the bird is big enough to kill, then preflights are not an option!

http://www.fastenal.com/content/documents/FastenalTechnicalReferenceGuide.pdf

Tensile Loads P19 (doc page) P21 (Adobe)

Torque spec for M2 SHCS 5.3 in-lb, 0.60 Nm

Without installing at proper torque, all bets are off!

http://www.micro-tools.com/store/P-2...e-510-Lbs.aspx
Another $86.46

Randy

Originally Posted by Helohead

If the bird is big enough to kill, then preflights are not an option!

http://www.fastenal.com/content/documents/FastenalTechnicalReferenceGuide.pdf

Tensile Loads P19 (doc page) P21 (Adobe)

Torque spec for M2 SHCS 5.3 in-lb, 0.60 Nm

Without installing at proper torque, all bets are off!

http://www.micro-tools.com/store/P-2...e-510-Lbs.aspx
Another $86.46

Randy

Very interesting document. Thanks for sharing! The section on galling was quite interesting.

I would love to own one of those torque drivers which begs for a set of bits as well.

I'm working on my kit right now and I can't get the 3GX to give me any signs of live? Shouldn't there be at least a LED light up or something? I'm using the RX-2801 Rx that I connected to the 3GX and I can bind my Tx with that one. Just the 3GX is dead? Any help is appreciated...

Assuming you have power to the ESC. Instruction manual P21. As per the diagram/picture, ESC (Wt, Blk., R) to 3GX left side with white (signal) up. This should give you power to the 3GX. Lower right (Batt. out) to the 2801 aux 2 white to the inside. That should give you power to the 2801. This is the way I have mine wired and it has been working this way so far.

Hope this helps.

Yup, that's the way I have it. Rx blinks and binds with Tx. 3GX... nothing. Are there any Tx setting that need to be done? I have to have the bind bridge plugged in in order to get the Tx to bind with the Rx. Is that normal? Can you post some pictures of your Rx and 3GX? Thanks...

One more thing. I also can't connect it via USB to my PC...It says: Linking...Fail. But I guess that's normal as long as the 3GX is not on.

got it... The Rx needs to be connected via BIND...not BATT