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gadawg58
07-31-2007, 07:32 PM
I just recently received my new HDX 450 V3 and have had several issues with overall quality of the heli. Issues are:

1) Many bad(gritty) bearing right out of the box. Not even installed!
2) Missing many of the ball link assemblies.
3) Way too much slop in the blade grips ... ended up being missing thrust bearings in the grips which are pre-assembled.
4) Swash binds right out of the box
5) Tail shaft is very tight. Maybe bad bearings again?
6) Of the ball link rods that I did receive, 2 were not large enough to bite into
the ball link ends enough to hold...I could easily pull them out after
screwing them in.

gadawg58
08-04-2007, 11:50 AM
I have been working with someone in Tech Support but after 1 week of swapping emails the are "negotiating" which parts they are going to replace and which ones I should just buy ... preferably from them! Not impressive customer service so far! I have gone the LHS and purchase enough TREX 450 parts to finish the build so I'll be flying probably tomorrow...hope after all this it flies well!


UPDATE...I finally received the missing or broken parts for the HDX-450 and will be finishing the build in the next few days. There are however a couple of issues with the replacement parts.The quality of the ball links that they supplied was not very good so I ended up switching to Align ball links, rods, and balls. The Sonix set they sent which was an upgrade from what shipped with the 450 just come off of the balls way too easy and would come off while on the bench just by moving the cyclic controls on the remote with the motor unplugged. Align parts fixed that. Also, a lot of wobble in the stock main gear, even more than in my T-Rex. We'll see how it all works out...


FLYING ... Got the bird in the air today and after a small amount of tweaking had it flying fairly well. Didn't do any 3D but did some aggressive figure 8's and stall turns and it worked out pretty good. I like my TREX 450 SE a little better right now but I'm not done tweaking the HDX yet either.

In the end this is going to be a great second heli...and heck maybe even give my TREX a run for its money. I would recommend this for someone looking for a less expensive alternative to the TREX but not as a first build. There were too many issues with the kit out of the box and without having already had a stash of spare TREX parts I would have had a hard time getting this heli to fly. Also, a parts manual with an exploded parts list would be a good thing so you could quickly see what parts you might be missing.

I will have to say that the folks at HeliDirect did come through in the end even though it took longer than I would have liked and got me the parts I needed without too much hassle other than the wait. I will probably buy an HDX 500 later if this heli proves to be as good as I think it might as I get it tweaked. If HeliDirect would correct the issues with the kit then I think this little heli could give the TREX and run for its money! Enjoy!

gadawg58
08-26-2007, 11:19 PM
Just a quick note...the little heli does fly good while its flying but it does like to come apart in the air. Have had the ball screws break twice and put into the ground. It also seems they have a parts consistency issue. The flybar that came with the kit was .25mm bigger than the middle of the bearing. They sent new replacement parts and guess what...the Sonix flybars they sent don't fit either. Just put in the the Align 220mm flybar and moved on. Also, the bearings they send tend to be bad and even different sizes at times. Had to try 5 different bearings to find 2 that would go in the main bearing holder. Once it is in the air though it does rip through the air even a little more aggressively than my trex450se V1 but probably going to become a hangar queen as it just likes to fall apart all too often. One good thing though...my 6 year old son loves to watch me fly it to see how it will crash the next time. He loves to say ... Cool, do it again dad! :)

essence25
08-30-2007, 04:22 PM
Dammnn, and I was just about to get me one HDX450 (B) in adition to my T-rex 450SE V2...
Now u got me thinking... Tell me more about it, why are ball link screwes breaking while flying?
Can u use the t-rex ones if they are better?

Danyboy
08-31-2007, 03:25 AM
George,

Thanks a lot for your reported first-hand expirience...

There are some people condemning a heli as total crap because of a personal feeling or - even better - by things they heard from a guy that knows another who, etc, but you simply report your findings in an objective way so the reader can make up his mind (as journalism should work... ;) ).

I've been looking into buying a HDX500, but hearing about your problems: No thank you...
Especially since I live overseas...

Cheers,

Daniel

gadawg58
09-02-2007, 01:45 AM
Dammnn, and I was just about to get me one HDX450 (B) in adition to my T-rex 450SE V2...
Now u got me thinking... Tell me more about it, why are ball link screwes breaking while flying?
Can u use the t-rex ones if they are better?

Not really sure why they are breaking but I've not tried the Align screws..Something I'll probably try next...had one pull completely out of the head stripping the threads. Head metal seems really soft compared to Align head. Am trying to decide if I should try and rebuild the head again or try another head. I've been looking at the CopterX heads and wondering for this bird would that head be any better. It appears, although I've not seen one up close, that the CopterX head might have a few improvements over the HDX stock head and is still really inexpensive. Could put an Align head on it but then I already have a TREX 450se V1 which flies sweeeeet! Just trying to find a bird that is a little less expensive to practice new moves on that when I crash I don't hate it quite as much. :)

cbdane
09-02-2007, 02:51 AM
Tried the HDX300 about a year ago. Complete nightmare. Aluminum parts made of butter. Sounds like the 450 is not much better (with the exception of the fact that it flies without the tail exploding). I'll never touch anything from this company again. Just my 2c.

CharlieK
09-03-2007, 02:18 PM
I'd have to agree that the HDX 300 and 450 have a way to go to become good kits.
450 Flybar diameter too large or one bearing inner diameter too small. Had to hand lap flybar to fit. Similar problem with HDX 300 solved with flybar from EFlite spare. One flybar shipped with HDX 300 was correct for the 450, but bent slightly.
Misc. problems with screw lengths, types(knurled/nonknurled).
450 belt drive gear on main shaft warped vertically, meshes ~50% with gear on tail drive idler assy.

HDX 300 length of links not documented, and the video seems to have a different head assembly. Plastic link ball ends difficult to start on link rods. I ended up "prethreading" them on the servo link rods, and in some cases, reaming them with a small drill bit.

One V2 HDX 300 tail rotor assy binds at limits of pitch control. In addition, the bearings were "rough"

450 idler assy again, bearings not too good. seems to have a "flat spot when belt is under tension.

300 Servo mount mounting screws have an interference fit with servo tabs. Filing is necessary on both servo tabs and mount screws.

300, 450 taper for flathead screws on various parts (as shown in video) not on actual parts.

450 Link Lengths listed in video are ballpark only.

DO NOT CA anything until you are absolutely positive that everything fits together properly.
I had some problems with threads on some parts, screw lengths, etc.

Small shim washers may be needed on main shaft of both 300 and 450. The V2 300 main shaft belt drive pully rubs against the bottom of the housing for the lower main shaft bearing unless shimmed. Shim washers for the E-Flite CP Pro blade holders seem to be about the correct size for the HDX 300 main shaft, too small for the 450.

Goku
09-17-2007, 06:41 PM
I'm still in the process of putting my HDX 450 V3 together. So far, I've noticed the bearings were very notchy on the tail drive shaft (replacements in route) and the anti-rotation brace slot is slightly undersized. If it weren't for the Finless videos, the downloadable manual would be about 50% worthless for the build-up.

Looks like they've over provided screws, but seems there was a change in parts since manual was printed because the anti-rotation brace is now held with screws and cnc brace, not held by notch in frame as indicated in manual and Finless video.

dave3913
09-18-2007, 09:36 AM
Ive got one....garbage....good tail...but that is it...period....I wont even sell mine..Wouldnt do that to anyone...dave

essence25
09-18-2007, 07:46 PM
Ive got one....garbage....good tail...but that is it...period....I wont even sell mine..Wouldnt do that to anyone...dave

LOL, thats funny I actually got 2 latest version HDX tails, one is on the T-rex 450SE V2 and I love it. I was thinking to get another 450 heli either another T-rex or the HDX but I guess you dont recommend the HDX it huh ?

I have dealer cost with Align so price for another t-rex is pretty close to the HDX. Just wanted a different flavor.

Hope that Beam heli wil be fine when Miniature Aircraft releases it.

I still need to hear from Goku how your build comes out.

l8r

Goku
09-20-2007, 01:38 PM
I still need to hear from Goku how your build comes out.


Build is going slow, but I'm past the frame build, choice in CCPM servos seems limited to HS55-size. Futaba 3154 is definitely too small and will not fit. So far the head looks good, I believe the rest of the build should be as straight forward per Finless video. If there is interest, I'll try to keep this chain updated with my progress.

:)

gadawg58
09-20-2007, 09:32 PM
Please do and good luck!

istandalone
09-24-2007, 03:26 PM
damn, looks like i dodged a bullet on this one. i came very close to getting one. the only thing that stopped me was that the site i was looking at them on said it comes with no manual at all. how can a company sell a product without paper work, exploded views or at minimum a damn parts list?

Randallhurd
09-27-2007, 08:00 AM
I have a HDX 300, Do not get the Upgrade Head where the Fly bar is below the BLades... I've tried lots of differant things to make it work, but never successfully. The Main Shafts bent every time and damage servo face plates. After hours of adjustments and more attempts the CNC Belt Drive finally shattered from the massive amout of vibration when the main shaft bends breaking the servo cases every time. I finally gave up and put the Stock head back on it and that fixed the Problem. I measured the shaft lengths with various swash plate adjustments and the only conclusion that I could come up with, is there is two much main shaft between Swash Plate and Head for it to be stable. I tried installing a super think colar from the upper bearing to the swash plate and it still bent at 3/4 throttle.
Most of the measurements that I took for precision were down to .00001. with no success.

Goku
09-29-2007, 12:44 AM
damn, looks like i dodged a bullet on this one. i came very close to getting one. the only thing that stopped me was that the site i was looking at them on said it comes with no manual at all. how can a company sell a product without paper work, exploded views or at minimum a damn parts list?

Yeah, it is odd that it doesn't come with an instruction manual but it is available for download. If your interested, here's a link (http://www.helidirect.com/upload/HDX450SE-V3.pdf).

Randallhurd
09-29-2007, 11:57 AM
The frame assembley on that one is somewhat differant. I have the Micro Heli top end back on it and it flys ok,, I'm going to work on it again later, My Trex600 Came in yesterday. I finished the build at 2am,, Ouch!! I think I'm get Rex rolling before start back on that one,,, Thanks for the link,, the manual really helps.. Did have that one,
Thanks Again,, Have a Great Day!!!

bcane98
10-23-2007, 12:49 PM
WoW... What a downer... I just picked up a V2 in a trade for a truggy... I'm kinda worried now especially since I am a n00b at flying myself. This is my second attempt at flying helicopters... the first time started out great, but ended soon after I started hovering as I started cycling and that is just as if not more expensive of a hobby. Looks my my second attempt may not even get off the ground...

Might as well save my money and buy parts for my bike instead...

http://i77.photobucket.com/albums/j75/bcane98/Helicopter/th_TRex_Front.jpg (http://i77.photobucket.com/albums/j75/bcane98/Helicopter/TRex_Front.jpg)http://i77.photobucket.com/albums/j75/bcane98/Helicopter/th_TRex_Frame_2.jpg (http://i77.photobucket.com/albums/j75/bcane98/Helicopter/TRex_Frame_2.jpg)http://i77.photobucket.com/albums/j75/bcane98/Helicopter/th_TRex_Frame_1.jpg (http://i77.photobucket.com/albums/j75/bcane98/Helicopter/TRex_Frame_1.jpg)http://i77.photobucket.com/albums/j75/bcane98/Helicopter/th_TRex_2.jpg (http://i77.photobucket.com/albums/j75/bcane98/Helicopter/TRex_2.jpg)http://i77.photobucket.com/albums/j75/bcane98/Helicopter/th_TRex_1.jpg (http://i77.photobucket.com/albums/j75/bcane98/Helicopter/TRex_1.jpg)

Rogan
10-24-2007, 07:58 AM
WoW... What a downer... I just picked up a V2 in a trade for a truggy... I'm kinda worried now especially since I am a n00b at flying myself. This is my second attempt at flying helicopters... the first time started out great, but ended soon after I started hovering as I started cycling and that is just as if not more expensive of a hobby. Looks my my second attempt may not even get off the ground...

Might as well save my money and buy parts for my bike instead...

http://i77.photobucket.com/albums/j75/bcane98/Helicopter/th_TRex_Front.jpg (http://i77.photobucket.com/albums/j75/bcane98/Helicopter/TRex_Front.jpg)http://i77.photobucket.com/albums/j75/bcane98/Helicopter/th_TRex_Frame_2.jpg (http://i77.photobucket.com/albums/j75/bcane98/Helicopter/TRex_Frame_2.jpg)http://i77.photobucket.com/albums/j75/bcane98/Helicopter/th_TRex_Frame_1.jpg (http://i77.photobucket.com/albums/j75/bcane98/Helicopter/TRex_Frame_1.jpg)http://i77.photobucket.com/albums/j75/bcane98/Helicopter/th_TRex_2.jpg (http://i77.photobucket.com/albums/j75/bcane98/Helicopter/TRex_2.jpg)http://i77.photobucket.com/albums/j75/bcane98/Helicopter/th_TRex_1.jpg (http://i77.photobucket.com/albums/j75/bcane98/Helicopter/TRex_1.jpg)

It's better than the Walkera I started with.

Now stop moaning and get flying. :thumbup:

Goku
10-24-2007, 01:49 PM
Ok, haven't been updating this thread in a while. Now, I can't compare this heli to anything other than my Blade CX2, but first set the ground work, I have the following setup:

CC35/JGF 450TH/11T
DX7/AR7000
3xDS285/SportBEC
401/9650
Several 3S EVO's/4S EVO LitesThe DS285's were a little tight to squeeze into the frame. Had to insert the main/tail gears into the frame before I attached the pieces together. Can't comment about tail/head slop, since I'm not really sure what exactly what it looks or feels like.

I have ESC set to fixed end points with a flat line at 85% from 25% to 100% throttle. My Swash Mix is 50%/50%/100% on the pitch.

On 3S, it nice and sedate and very stable in 10 MPH gusts and a pleasure to leisure fly. It'll bog a little when I pump the throttle. Still breaking them in, but I think I can get close to 10min of hover practice.

On 4S, it comes alive. Very nimble and very responsive!

I'm still practicing my tail in hovers. Had several crashes when I got a little too comfortable hovering. :Slap But after several feathering shafts/main shafts/fly bars/a lotta woodies/one lower frame, I'm very impressed and happy with the T-Rex in general. I've given up building my HBKII, maybe a project for later or maybe I'll just convert it to TRex head/tail. I can say that of the parts I've replaced on the head, I was able to swap Align parts from my LHS. The lower frame is in the mail as we speak. But the frame/head/tail have been pretty durable after quite a few crashes. Landing gear has buffered a few very rough landings

69maverick
11-04-2007, 07:38 AM
I recently Built a 450 using the TK frame from Helidirect and I'm using a DX7 radio. It is very stable and really moves out. I am using a T-Rex tail rotor but I will be changing it soon to the HDX parts.
P.S. try the program mixing on the DX7 to increase power by 20% with cyclic and rudder movement it works great.

damyxz
11-17-2007, 01:28 AM
I have the 450fs version. Everything came fine( no gritty bearings). Great machine with a unique look. I used a 450 size MFS head similar to the 3DMP head. So far no problems after 1 year. The only grip I have is that I wish they design their own canopy instead of the trex ones. They should have made a henseleit 3DMP type canopy for this one.

veegor
11-17-2007, 12:09 PM
Just thought I hop in on the band wagon....The HDX 450 is a very nice bird to fly and work on. I never flown a ALIGN trex 450 but with the right align upgrade parts that are compatiable this heli will fly well IMO.

helidirect
11-18-2007, 04:38 AM
I have the 450fs version. Everything came fine( no gritty bearings). Great machine with a unique look. I used a 450 size MFS head similar to the 3DMP head. So far no problems after 1 year. The only grip I have is that I wish they design their own canopy instead of the trex ones. They should have made a henseleit 3DMP type canopy for this one.


New canopy style is on the work.

Steve

WillJames
11-18-2007, 04:48 PM
New canopy style is on the work.

Steve

Owner of HeliDirect answering requests. Bravo!!