HobbyKing Online R/C Hobby Store : HobbyKing 450 4-Blade Rotor Head

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12/08/2010
ASSELIN (91%)
Hi. I just receive my 4 blades rotor head and put it on my helico. I try and it seems that it does not respond as expecteed, what ever the position of the linkage. Does anybody know what is the appropriate position of the U linkage and how this should be assemble in the helico ? Many thanks, Norbert

Frogman (61%)
Hi Asselin, The "U" in the photo is upside down, and must be behind the shaft. In addition the rods of the head should be tilted.

sleat (78%)
The anti-rotation bracket is the key. It has two pieces, an outer, and an inner, bot D shaped. Make sure the outer wraps around the inner, and slip it onto the main shaft. Now, decide whether your swashplate is up=blade pitch up, or down=blade pitch up. If the first one, the pitch change links on the blade grips should stick out the leading edge of the blades. Lastly, make sure the anti-rotation bracket (the D shaped thing) is such that a given control rod is 90 degrees ahead of the blade it controls on the swashplate. In other words, if the swash ball is over the tail, the blade should be sticking out the right side of the helicopter, travelling backwards. Tighten it up when it's right, and run the heli while holding it firmly to confirm proper control effects.

Simon (100%)
Hi Sleat, yeah I set mine up with the swash ball 90deg ahead of the blade and works well, however, feels very sensitive in flight, do you think a 3 axis gyro needs to be installed when using these multi-bladed heads?

29/07/2010
Frogman (61%)
Could this multiblade head in a TT Minititan heli?

David (50%)
If the Minititan has a 5mm shaft and a 120 degree ccpm swash setup then the only thing standing in your way is your will and ability, have fun Frogman!

26/07/2010
Sleurhutje (83%)
Received two heads but it seems that the four links are too long for a direct fit. Had to shorten them by 7mm.

idid (56%)
I hope you didn't assemble the heads as in the picture. In the aspect of the picture above, the "U" or "Y" shaped linkage should be placed in the back of the picture, hance the linkaged also in the back of the picture. Only then, you can link the feathering arm to the ball link of swash plate which is 90 deg. ahead of its phase.

Frogman (61%)
Hi. idid, My links to the heads are too longs too. Could you put a picture of explanation with the "U" connection?

Sleurhutje (83%)
No, the seesaw in the pic is wrong. However, when mounting correctly it lock's up on the ball link.

When mounting the links as in the pic, on the leading edge of the blades, they're of the correct length. However they're more vulnerable for damage in case of a crash. By mounting them like this you don't have to reverse the servo's and is a direct fit. I prefer the links on the trailing edge and had to relace the rods by shorter ones (searched in some drawer at my LHS).

Also remove the stopper on top. It will destroy the links in case of a crash or blade strike.

sleat (78%)
The links are not meant to go vertical, they kind of wrap around the head, so as to cause the swash balls to lead the blades they control by 90 degrees.
You should get some new PC links.

25/07/2010
MacDaddy97 (80%)
Would the 4 blade head system work with the belt CP?

Christian (39%)
I would buy a hk 450 V2, because the Belt chassis is very unstable, and on this 4 bladed head is much more power than on the standart one. And i'd use metal gear servos on TS!

21/07/2010
Robert (84%)
Hi All, Does anyone know if it's rigid or flapping hinge?
Cheers

sleat (78%)
'Flapid'. The blades can lead-lag unless they're tight, but aside from flex, there's very little flapping. Very much like a real OH-6/MD500. There might be 1 degree of play in the blade-grip bearings. 'rigid rotor' systems don't seem to need all the feathering shaft bushings and gumf that 2 blade systems have.

7/07/2010
repko (34%)
I received an email saying this item was back in stock, 3 days ago. :( Still showing no stock ???

JOU (35%)
There is so many demand of this product, that when a new remittance comes to HK, the stock is continues appearing in negative.

16/06/2010
repko (34%)
How about multi-blade tail units? Are they just around the corner?

jeremymtc (80%)
I second this! I would love to have a 450-size 4-blade tail unit (so would many others).

bigdaddy1962 (27%)
i want 3 poss 5

hungrysteve (42%)
try rc-expert****(HK),many multiblade tail systems

16/06/2010
wiper (72%)
Is it posiblle to mount this rotor head on
t-rex 450 pro?

Demon (73%)
Of course, both use a 5mm shaft and 120 degree swash plate... Though why you want a scale head on a Pro heli is beyond me :P

This customer was awarded a credit for their answer.

bo-105 (46%)
if possible.

David (50%)
Yes as long as the basic 5mm shaft diameter and 120 degree ccpm setup is utilized on the T-rex pro.
What made you buy the T-rex? The HK range of heli's are fantastic and are direct clones of the T-rex, there are no quality issues that I have found at all (and am around align helis often). All helis require the same assembly and preflight checks no matter what their origin.

sleat (78%)
It should fit on any 5mm shaft CCPM 450 style heli.

15/06/2010
BAMBAM Cheapsk8 (56%)
Wow, never thought I would pre-order something but this is tempting.

15/06/2010
dcptr (55%)
so what do you need to get this running? flybarless stabilister? co-pilot2 4-chan on here?

Chrissy47 (59%)
Nothing additional is needed, having 4 blades eliminates the need for a flybar. There have been a few 4 bladed setups around for a while now (CopterX for one), but the price on this one is pretty impressive.

Robbie (81%)
What are the advantages in using a 4 blade head ?

Jason5001 (4%)
Robbie, it's fun and a little different.
No advantages.

Robbie (81%)
it sure looks more realistic if you use a scale fuselage, also the 5 blades head on a black md500 should look terrific! thanks

Eric1180 (-53%)
How does a 4-5 blade heli sound?? compared to 2 blade

kevinb120 (70%)
Note, on all multi-blade flybarless heads, you WILL need a 3-axis gyro unless the grips are a flapping type. You also need to take into account altering the the tail rotor rpm, pinion gears and/or motor kv changes, and other issues, as the lift goes up exponentially, along with torque effect of the multiple blades. That being said, this is an absolutely astounding price, flapping or not. Just be aware that going multi-blade is not just 'throw it on' and go.

kevinb120 (70%)
That being said, OF COURSE I ordered them! :)

Eric1180 (-53%)
so maybe incresing the tail rotor blade size?

GenericFlyer (88%)
Lots of things to consider. The full load will go up considerably on your motor, so you need to take out pitch throws if you don't want to burn up your ESC or motor. It would be nice if they would make up some shorter cord blades for these. You should also go with the lowest tooth pinion you can get for your motor. If you want to change out your motor, go for something with a lower KV.

kevinb120 (70%)
In the US, there are places like rcaerodyne that sell scale blade sets at very reasonable prices.

Demon (73%)
Hey Kevin, i Dont think you will need to spent the big bucks on matched 4's of blades with the 4 blade head, 2 pairs of 2 blades which are balanced only with the opposite blade will be just fine. the 5 blade head on the other hand is another story :P

kevinb120 (70%)
They're not expensive, ~$25-$35 for a set of 4-5 scale blades.

CALIN (44%)
1 question: How will you connect the shash to the links of the servo? I think it's a small difference. isn't it?

Hoover (100%)
The only way I could control the massive torque was to set head speed very high and the pitch very low. Heli response is instant and very crisp, but can be flown (?) if your nerve is up to the task. My heart rate came down after a bit! Now, where is that stabilizer?

Frogman (61%)
Could it fit in a TT minititan heli??

wolff (100%)
i know alot of people that dont use 3axis gyros, or any stabs with 4 blade rotor head systems. it is not needed. thats just to get you to spend money and those are really big bucks. some people aint rich . some people have a tight budget for this hobby. and unless they are as good as the pros then they dont get sponsored by any comany... stab systems and 3 axis gyros, = big spending and in my opinion are a waste of time.

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