Further to my original posting on the HK 450 pro, have now completed and test flown. First comments, what an excellent piece of kit for £45.00. Everything went together pretty well, no issues at all. Am sure the Align purists and "brand" concious heli guys will not like these heli's, but it's them that are missing out buying and paying over the odds for a "label" heli.
Amongst others, I have built and own an Align Trex 250 super combo. Its great, but would I buy again having now found the GC version. No. I cant see the difference in quality between the HK 450 parts and the Trex 250, I really can't.
Anyway, back to the HK450. Pleasure to build, some have complained about the "soft" screws being the weak point. Yes they are a bit, but only if you over tighten. They are small, just don't over do it, not needed. I had no parts missing, eveything nicely bagged and packaged, and all the bolts needing locktite were already done.
I tried to build this sourcing all parts from GC, and apart from the tail servo, achieved this. My only critisism on the entire heli was the canopy. Nicely painted as per photo's, but just a little tight in width to get it over the canopy retaining stubs when putting on, and being fibre glass, its cracking a bit already.
Apart from that, extremely impressed. Just needed a little trimming on the cyclic push rods to get sorted, and it was away. No vibration. Even the supplied plastic blades only needed a piece of insulation tape 12mmx 10mm on one to balance them up)
To build, you need to download a 450 Pro manual. I got into a muddle trying to follow the GC build log for the belt version. Not the correct one, although worth looking at that too for some excellent advice/tips.
I used;
Towerpro MG90's x 3 cyclic (check the soldering though where the cable enters the servo, one of mine was badly soldered and intermittent when the cable was moved around. Re-soldered now fine)
Towerpro 450 heli 2415 07T 3850kv Brushless (Plenty of power,sounds really throaty!!!)
13t pinion
40 Amp Pentium ESC (can't get the soft start to work) but apart from that seems ok. Running on Low timing.
GC Spektrum compatible DSM2 rx (was sceptical, can't tell the difference between my genuine Spektrum ones)
GC 401b Gyro. Wow!!!! Really good for the money. I have always bought "brand" gyro's before (GY401/GP 750) Really cant tell the difference. (couldn't get the rudder limit pot to do much, it was out of range even on the lowest. The tail servo horn recommend distance from centre to ball is 10mm. Reduced to 8mm and everything ok, rudder limit pot now within range and setup ok.
DS 520 digital tail servo.
So if anyone was worried about buying "cheap" copies etc (as I was) have a look at the items above. Work out the difference in cost between this and a well known brand 450 pro. Significant difference!!!!!!!!!!
- Finished HK 450 Pro CF
- HK 450 Pro CF
I finished with 450s last year as they were tooo twitchy (Or am I Tooo OLD l0l) went over to the 500s. Saw this one, carbon, billet and a £50 tail conversion already installed, just new I needed one 
.................. don’t know why yet !