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My experience with the HK-500GT

jackheli

rrProfessor

Vancouver - Canada

So... I wanted to know what a clone looks like. This is my configuration:

1x #HK500CMT/11445 HK-500CMT 3D Electric Helicopter Kit (incl. GF blades and extras) = $99.99
1x #TY500H-1700/9258 Turnigy Typhoon 500H Heli Motor 1800kv (500 Class) = $24.95
1x #TR_P60A/2166 TURNIGY Plush 60amp Speed Controller = $32.11
3x #TGY-MG930/9391 Turnigy MG930 Digital Metal Gear Servo 3.6kg / 26g / 0.14sec = $41.97
1x #HKS9257/13422 HKS-9257 High Speed Servo 4.5kg/ 25g/ 0.07sec = $10.14
1x #TR_PC/2169 TURNIGY BESC Programming Card = $6.95
1x #ORNG8F/14300 OrangeRx Futaba FASST Compatible 8Ch 2.4Ghz Receiver = $29.99
1x #AM1001A/68 PolyMax 3.5mm Gold Connectors 10 PAIRS (20PC) = $1.50
1x #GA-250/15318 hobby king GA-250 MINI-MEMS Gyro = $9.99

Total: about $300 for a ready to fly 500 helicopter... Looks cool, huh?

This is the result. Judge by yourself:

On the build:
The head was too stiff
1- the washout does not work. The arms would bind against the washout block no matter what I did or how many washers I added. The original Align block has small ridges (where the bolt goes in) that prevent the arms from touching the sides (only the inner ring of the arm bearing touches the ridge on the block). For now I added a lot of loctite and did not screw the bolts all the way in. I’ll keep an eye open for that on first spool. Worst case I’ll buy the Align block for $10 (that’s 10% of the total cost of the kit, btw…!!!!)
2- I needed to size a lot of ball links
3- There was no grease in the thrust bearings or spindle.
4- Half of the bolts and balls on the head/swash did not have locktite and some where loose.
5- The canopy, made of cheap thin brittle plastic, is cracked in two places already, and I haven’t even tried it on…
6- The boom was 3mm too long... I had to cut it down and extend the guide slot so the belt would be at the right tightness.
7 Needed to cut short both links on the rudder control rod AND cut the rod itself
8- There was no way to insert the brackets that hold the tail servo without scratching the boom!!!!… I refrained from sanding the brackets down since it would take off the finish. Best of two bad solutions…
9- The thrust bearing on one of the metal tail grip holders does not sit well, which causes the grip to bind badly if tightened. Out of pure luck (!!!!) I had the exact milling cutter to do the job. I took .2mm off the inside bottom of the grip, which is now smooth as silk, with no play.
10- The screws for landing gear struts were too short and had no washers
11- There where no washers provided for the bolts that hold the servos to the frames
12- The boom support metal ends were poorly glued and had to be sanded and reglued
13- No set screws to lock the skids to the landing struts
14- No battery straps provided with the kit
15- There is no upper bracket to hold the horizontal fin, which is bolted directly into a bottom bracket
16- The bolts that hold the balls on the servo arms are not long enough to hold a counter nut
17- No counter nuts supplied for the servo arm balls

Now during my fist attempts on spool up:

Firstly, I did not have the balls to try the FG blades. Those things look dangerous...
I also bought a new canopy...

1- Both canopy grommets broke on the first time I tried to remove the canopy
2- The little plastic stoppers at the end of the landing skids are not glued in (I already lost one...)
3- On first spool the tailcase did not lock on the boom. Needed to add a locking bolt to pin it down
4- On second spool up the boom did not lock to the frame. Needed to add a locking bolt to pin it down too!
5- On Third spool up the exit bearing that supports the tail axle failed.
6- After bearing replacement and next spool up the plastic tail drive gear stripped.
7- On replacing the stripped gear I noted that the mesh on the tail gears was nonexistent... so I had to elongate pretty much all the holes on the frames that secure the tailcase. Took me about two hours to get it right...
8- replaced the bearings that hold the tail pulley shaft too: the supplied ones were already with lots of slop (only 40 seconds of spool, mind you...).
9-In the process of putting the tail back into the frames I broke one of the skids. REALLY soft aluminum. Won't hold any abuse... so replaced..
10- After putting everything back together I noticed that the gear and pulley had slop and could move 1mm up or down... so I had to go back, disassemble everything again and shim the bearings... Yikes!

Today I finally managed to hover after 4 unsuccessful attempts (Every time I tried before something broke before lift off)

Not this time... I managed to hover and do a quick circuit... before the tail case completely disintegrated! The metal plates that hold the exit shaft simply cracked and fell off...

From the stress fracture it was easy to see the metal is sub par with lots of impurities. Very very cheap.

So I replaced the tailcase, belt and tail bellcrank with an Align and will try tomorrow again. In the end the whole helicopter will be Align, bit by bit.

I am not sure it is not worth going the Align way. Adding a real canopy , blades and the faulty parts almost matches the Align cost. What do you think?

If I manage to fly it proper I'll tell you how it 3Ds...

If you have nothing else to do try this helicopter

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

05-01-2011 Over year old.
Heliguychris

Key Veteran

Perth, West Australia

Sounds like you had fun then ?

Was nice of you to list the fixes tho. Good post bro

Licensed (CASA) UAV operator certificate holder 1-YFOF5-01 www.helicamaerial.com.au

05-01-2011 Over year old.
HOMEPAGE  
FloridaHeli

Veteran

jacksonville, florida

Yes very informative

U get what U pay4

This hobby is WAY too expensive!!

05-01-2011 Over year old.
870heli

Senior Heliman

Monson Ma. USA

HK-500

Well I just got one also. I did it cheep to. I had servos, gyro and a speed controller so I said how bad can it be!! I have not tryed mine yet. It's cheep and it's cheeply made. My son and I have had a lot of laughs while working on this but it is kind of sad that something could be made this bad.
I am almost done. I haven't had anything break yet but I will keep a eye on everything and hope for the best.
Like they say you get what you pay for!!!! I just thought how bad can it be, NOW I KNOW.....
O well just wanted something to play in the yard with. Maybe it will be something to play in the cellar with.
Good luck with yours.
870Heli

05-01-2011 Over year old.
ESWLFSE

Elite Veteran

Cedar Park, TX

Fleeting thoughts about building the $300 500 all gone now thanks!

05-01-2011 Over year old.
nickt919

Veteran

New Orleans, Louisiana

A friend had an experience quite similar except he didn't have the perseverance that the OP has. He cut his losses and scrapped the build in the middle then went out and got an Align 500. If he would have seen it through it would have been an Align 500 anyway.

05-01-2011 Over year old.
jackheli

rrProfessor

Vancouver - Canada

ok - today's report...
replaced the tail cage and went to field.

The tail was acting REALLY weird. At first I blamed the poor $10 gyro, but after further inspection we found that the culprit was the HKS9257... there is a weird notch that comes up once in a while that locks the servo up... so that's a gonner too...

Also, the ESC stopped singing the cell count... really strange. Nothing changed on the setup... go figure.

It seems to arm and work properly, but no cell count...

Will I EVER have a flight on this heli?

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

05-02-2011 Over year old.
MartyH

Elite Veteran

USA

You've saved me some money and A LOT of aggrevation. I was eyeing this as my potential first entry into electric.

05-02-2011 Over year old.
funkindatrunk

Senior Heliman

Millersville TN USA

i also built one of these junks last year and it was a pain in the ass. After replacing a bunch of parts with align, it was flyable. When doing 3d the tail would always do something crazy. This thing is not worth the trouble.

I have learned if you move the sticks the right way you wont crash.

05-02-2011 Over year old.
Stephen Born

Elite Veteran

Vereinigten Staaten

So you buy a cheap heli and replace it with all Align parts... I find it easier to buy an Align kit and fly.

Team HeliProz
PerformancePlusRC

05-03-2011 Over year old.
wifeorheli

Elite Veteran

reno, nevada usa

You get what you pay for especially with heli stuff dont go cheap i learned that along time ago

05-03-2011 Over year old.
HOMEPAGE  
funkindatrunk

Senior Heliman

Millersville TN USA

I posted this a while back about the hk 500. Its a vid to promote it. You will love it.

http://rc.runryder.com/helicopter/t628013p1/

I have learned if you move the sticks the right way you wont crash.

05-03-2011 Over year old.
jackheli

rrProfessor

Vancouver - Canada

That's a funny video. Counter advertisement by the company that sells the product. Never seen than before...

... after seeing the video who would buy this &%$#**#&$????

They had the same issues I had... what a coincidence...

I have this theory that Align is behind this heli and they are the ones that manufacturer it, really poorly, on purpose...

The objective is to make us buy the spare parts separately...

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

05-03-2011 Over year old.
Dbrown308

Heliman

Shelton, ct - usa

I picked up an EXI 500 and have been building it for the past month. I went with the metal setup over the plastic. So far no issues aside from the main gear was too big and didn't line up with gear for the tail. I've swapped it out for the align part. The tail does make me nervous as there was no bolt to lock it in. I also noticed the same issues with the balls for the servo arms. They are not long enough to add a nut on the other side. Any thoughts on the EXI kit? Would hate to watch my hard work come apart on first flight.

05-03-2011 Over year old.
Rogman88

Elite Veteran

West Monroe, LA

I've had an EXI 450 LE and now have the 450 pro. The bearings are crap and loose from the get go. The plastic tail case on the LE had some slop and cracked in half during a crash. I scraped the kit and kept flying my align 450SEV2. Sold it and now have the pro. The metal parts have machining defects but overall work ok. The main and tail bearings as stated are very loose. I will replace soon with align bearing. Overall somewhat happy with the pro. Replacement parts are cheap and can be found in the USA.

High Voltage just works better

05-03-2011 Over year old.
HOMEPAGE  
MartyH

Elite Veteran

USA

I think I"ll pass an not jump into this pool of mud. There are enough things to be concerned with when building and flying a heli without dealing with all this quality control junk. I appreciate everyone;s input as you saved me from making what clearly would be a regretted purchase.

05-03-2011 Over year old.
870heli

Senior Heliman

Monson Ma. USA

HK-500

Well had my first flight today. Used two three cells with S-plug for 22.2v worked OK. I was expecting the worse after reeding all this but had to try it anyway. I had a 500T gyro in non heading hold to try for setting up. I ran it up looking and wating for all the bad things to happen. Finlly picked it up in a hover. I was holding a little right rudder but everything else was OK. I set it down and gave it maybe 4 or 5 clicks right trim and picked it back into a hover. I flue it up and down my yard and hoverer it for five min. or so. It worked great!!!!!! I was not expecting that. I took it back into the cellar and checked it over. All looked good.
Maybe I just got lucky. I know that was only one flight and maybe next time it will explowed. Hope not.
There was lots of things that needed to be locktighted and greesed.
The tail blades were out of balance. The blades also almost tracked right on.
Well I just wanted to use up some stuff that I had like Hiteck 425 servos, a speed cont.,Things like that. The only thing that I had to buy was the kit $102.93 and a motor that I got hear on RR for $25.00. So right now I don't feel bad.
Will I do it again? Well maybe next time I will get a real T-REX.
HA HA
Good Luck -- 870Heli

05-03-2011 Over year old.
BladeStrikes

Elite Veteran

Shelby TWP,Mi

All I did to mine was change the gear's to Align,same with the 600E.

05-03-2011 Over year old.
Stephen Born

Elite Veteran

Vereinigten Staaten

This video makes it sound like it is the one to have.

Watch at YouTube

Team HeliProz
PerformancePlusRC

05-04-2011 Over year old.
Zaneman007

Elite Veteran

Texas - USA

yea,

It sounds like a good deal. And you think it's cheap what have I got to lose.

Then, something snaps off and goes flying at you. And you think, thats a really bad idea.

Been there, done that.

Old Guys Rule!

05-04-2011 Over year old.
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