HDX 450 Build Videos will be here

[Finless]

No idea.... I keep bugging him and he never gets it done... Go bug him all of you!

Bob

[leapfrog]

Holy cow!

If you want a new heli in the HDX450SE, definitely replace the aluminum balls and the soft plastic link ends with the Align stainless balls and harder plastic link end sets. As mentioned earlier, it is a bit of an adventure in certain spots (like the inner swash and the grips - the Align set has slightly longer screws, and they must be adjusted here). But what a difference!

Here are the replaced parts - notice the anti-rotation pin, and the wear (http://www.helifreak.com/album_showpage.php?pic_id=13116)

It feels *much* lighter on the sticks, and the little *glitches* (I generally watch the head while flying, and I started seeing little "bumps" in hover) are a thing of the past.

There were a few balls that had flat spots on them... and like mentioned earlier, the anti-rotation pin had a flat spot worn into it. So it is not only a better flying heli, it is safer.

What I replaced... and what I replaced it with (http://www.helifreak.com/album_showpage.php?pic_id=13117)

Totally recommended "upgrade", here. I would go so far as to second BarnOwl in his recommendation and say this is a *must do*, pretty simply.

I put four bats through it tonight... and the birdy was totally great. That is all I have to say about that.

[rotoflight]

Not sure if this is the right place for this post so I apologize if it is not.
When I completed my set up, I found when I give left aileron the Heli tips right and when I give right aileron the Heli tips left. Everything else is as should be. The only other changes I made was in the swash mix for channel six where I had to run a negative value to get all three servos to move together. What do I need to do to correct aileron stick direction?
I am using a Hitec eclipse 7 in positive shift.
Thanks for any input.

[dutch_anykey]

Hi,

I have the eclipse on swash +70 -70 -70
You might have to change the 2 connectors on the RX. And go over the swah menu again.
Else you can look at this vid from Bob:
HDX Servo Setup (25 Megs 320x240 rez) its in the first post of this tread

Cheers,
Maurice

[rotoflight]

Hi Maurice,
I swapped channel 1 and 2 to get elev and ail in the right place.
In the swash mix I have ch 1 and 2 at +50 and ch 6 at -50.
From your post I think I need to reverse all three channels in the mix.
I see you are using 70% in the mix. I am glad to see that as 50% seems to be to little collective movement.
I am not quite getting enough swash level height at center stick.
But that's another issue.
Thanks, Roy

[rotoflight]

Sorry I forgot to mention I did swap ch 1 and 2 in the rx to get the elev and ail. working correctly in the radio.
I tried + -- in the swash and no difference in the ail. did however mess up my collective. I went back to ++-

[dutch_anykey]

Hi,

If i remember correctly it doesnt really matter witch one is left or right. But u mention 1 and 2 on the TX , But dont you mean ch 1 and ch 6 on the receiver (RX)? ch1 and ch6 are for the ail.
No servo's inverted and + - - worked for me. It should be the same for you i guess. Try with these settings and if it doesnt work try to swap ch 1 and 6

Maurice

[rotoflight]

I guess your right. I have ch 6 listed as the pitch servo and now that I check my notes I see that ch 1 is ail right and ch 6 is left. I must of missed it Thanks Maurice

[scalci]

Hi

I have a TREX 450XL with a JR X-378 transmitter

Is there anyone that can help me with the setup of the radio, and throttle & pich curves?

Regards
Johann

[ps61785]

I have a HDX450 (similar to a TRex) and my flybar seems to be "sticky" Ive looked over all the linkages and i cant fond any that are tight. I fitted all the ball and linkage joints and they are all lose now. Does anyone know any other things to check? It also seems to self level itself, and it doesnt seem to float freely like it should. Any suggestions?

[dutch_anykey]

How about the mainblade grips? When you disconnect the linkages do they move freely? Else you might have a short spindle shaft or too long spacers.

Maurice

[Russ]

on my hdx I had to loosen the screws attaching the seesaw to the rotor housing just a tad bit. make sure you loctite them.

[ps61785]

The main grips are good. They do indeed move freely when i detatch the linkages. I will try to loosen the seesaw just a bit and see if the makes a difference.

[BarnOwl]

Be careful loosening the seesaw, this causes tracking problems. Are you sure you have washers/collars between the screws/parts on all your head components? If there are no washers tightening the screws will lock up the bearings.

Just check all your head parts on washers!

I attached page 4 of the T-Rex manual (I realized there is no manual for the HDX head but the idea is the same)

[ps61785]

There arent supposed to be any washers between the seesaw and the hub according to the diagram. When i loosend the screws just slightly the seesaw is fine and moves freely as it should, and i loctited the screws so that they would not back out and the screws are only loosend very slightly (maybe a quarter turn at most). When i replaced the defective hub i must have overtightend the screws. I will look in the kit to see if there are any screws that are not threaded all the way up to replace the type that are in there. Also note that the HDX head is all ballbearing.

[Russ]

A couple things while I'm here. First the seesaw and the hub on my HDX has about a 1mm gap between them(+or-a couple .010) if the screw is tightened all the way the seesaw binds. Second the tail prob I had with the pitch slider sleeve seperating from the bearing I believe I have fixed. I removed the the entire pitch slider assembly from the heli and placed it with the bearing up on a firm surface then inserted a phillps screw driver that is slightly larger than the inside of the sleeve and gently tapped it with a hammer. The sleeve still turns freely and has not come apart nor can I pull it apart easily.

[dutch_anykey]

Hi Russ,

I hope this fix will do for you. Be carefull in mode 1 when going to higher rpm...I had it fixed as well that way but i lost tail again in higher rpm's.
The whole sonix tail costed me 3 crashes and a ditch in my confidence while flying. I switched to the microheli tail unit.....Gives me some mental rest in the head while flying hahaha.

But another question @Finless and/or Barnowl ...
I bought the align front belt pulley assembly. I needed it because the original hdx pulley got a wobble on my heli. I asked HD if it would fit with the stock gear, they answered that it was no problem. But something must have gone wrong, maybe i didnt ask it clearly. But in order to use it i will have to buy the "slow down" gear i believe 106T ?.
But what i wanted to know..what is the benefit of slower tail rpm? Or is it because you want higher main rotor rpm and you want to compensate the tail rpm by this?

Please let me know.

Thanks Maurice

[Russ]

Thanx Maurice. I put a Align tail unit on my HDX and use the sonix on my old heli. I just wanted to see if I could fix it. . I have cofidence in this fix because it is extremely hard to seperate now. But I will always keep a close eye on it.

[b0OM]

:mrgreen: Here it is months later and i am still LOVING my HDX450SE. I have a Caliber 30. Peeps told me i'd forget the HDX but they ere wrong. The HDX is way better flyer!!!

[jblloyd]

Which pinion - 11 or 13 tooth?

Aon 3550kv motor
CC 35amp ESC
TP 2100mah battery
HeliDirect blue gears (main and tail)
Align 325 Pro wood blades

Thanks

[ps61785]

jblloyd,

I run the 13 tooth pinion with mine...this will give you a good head speed...

[b0OM]

I have a 15 tooth pinion. ++ headspeed and this is one stable bird!

[leapfrog]

Which pinion - 11 or 13 tooth?

Aon 3550kv motor
CC 35amp ESC
TP 2100mah battery
HeliDirect blue gears (main and tail)
Align 325 Pro wood blades

Thanks

What kind of flying are you doing, jblloyd?

(/me wonders why no one asked that...)

[leapfrog]

Hey BarnOwl,

Just passed the 100-flight mark on the HDX450SE (I've been playing with other helis lately)... and it is definitely singing like a new bird with the rebuilt head... I'm also still using the HDX tailset, and no further problems (well, it *was* rebuilt twice - but nothing was replaced on it).

The MH tailset is on my T-rex SE... and has been great, too... I put a DS3400G servo on it with my G500T gyro (to try out the servo for a while - not really sure why I swapped out my 401)... but after about 20 flights I put my GY401 back on it ... lot's of tweaking to get the 500 just right... and it still isn't "better" than the 401... oh well, it's fun to play... I like the 3400G servo, but to be honest it isn't $15 better than my trusty 9650 <- totally my humble opinion. I think I'll leave it on for a while, though...

Well, that's my HDX update for now... still flyin' great (even better with the new "balls")... and one of the first to hit the air.

[BarnOwl]

Way to go, Leapfrog.........
That's what I like about this hobby: If you're not flying and the weather is bad, you start tweaking and fiddling till everything is better and better.
Keep it up! :D