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Heli-Max . Scorpion Power System . Ron's RC Helicopters
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Scale Model RC Helicopters

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t-rex 450 scale head

mpk000

Heliman

USA

Does anyone know where to get the scale 5 blade head complete with blades and everything. Also i heard that someone makes a setup to were you do not need to use any type of gyros to stabilize the flight. Thanks for the help.

02-20-2008 Over year old.
OU812

Heliman

Louisville, KY - United States

I bought a 4-Bladed head from rc-expert.com and I've posted a link below for the 5-Bladed head. I've just been using the Align wood blades (325's) - using the heaviest to balance with the 3 others so they weigh the same. I also downsized my motor and pinion to slow my head speed way down. I've been using a 3800kv motor and 9t pinion and estimating a 2200 rpm headspeed. I also had to play with the expo on the remote to calm the heli down. I've also flipped the one-way bearing, the tail rotor & blades, the motor direction by switching the wires and the leading edges of the main blaedes to have it turn counter-clockwise (Scale). I don't use any gyros and I've been able to keep it together and landing on the skids! Not without any skid marks.....in my shorts! Good Luck!

http://www.rc-expert.com/accessory....=147&aid=la0008

02-21-2008 Over year old.
mpk000

Heliman

USA

Thank you very much for the advice and info.
Matt

02-21-2008 Over year old.
mpk000

Heliman

USA

I went and looked at the 5 bladed head it is very cool. I was wondering if anyone was using the Lightning Heli CNC Metal 450Size Penta-Blades Complete Rotorhead and if they are are what size blades are you using (where do you get them)and do you need to do anything special to make it fly stable.
Thanks

02-21-2008 Over year old.
coptercptn

Key Veteran

Mesa AZ. USA

just ordered that head..here is the same one listed above except with a discount..I paid 121 shipped to my door..

http://www.flyhelirus.com/servlet/the-*Lightning-Heli-%3E-Rotor-Heads/Categories

Home of the "Sea Cobra".....

02-21-2008 Over year old.
mpk000

Heliman

USA

I just ordered the head myself I cant wait to put it on. Does anyone have any experience with blade size for this type of head or any other advice?
Thanks

02-22-2008 Over year old.
OU812

Heliman

Louisville, KY - United States

I'm using 325's and considering going to 315's just to have a slower cyclic response, but keep the weight up? I've thought of getting the blue and white Align fiberglass blades because the weigh quite a bit more than the woodies. I just now have the blades tracking pretty good, although they're still just about a hair off - but okay for now!

02-22-2008 Over year old.
doorman

rrProfessor

Sherwood, Arkansas

Blades

I am flying the 4 blade head and using the Align 325 carbon blades... and the results have been quite pleasing to fly... on a multi the heavier the blades the better...
Also, don't be afraid to reduce the travels in your swash mix, and take your time to get a good throttle/pitch mix going and all will be just fine... I have applied a lot of the settings that I have used on my larger multi's and each one has worked the same as on the bigger units...
One main thing is to make the heli nose heavy...the rear of the skids should come up 7-10mm prior to the front lifting off... this is very important...
Good Luck!!!! Stan

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations, Haiyin Battery

02-22-2008 Over year old.
slider46

rrProfessor

Gloversville, NY

Stan what other tips do you have for the multi blade heads.. I'm getting close to buying one for my 500E

Tom..... No "D" flying....

02-22-2008 Over year old.
mpk000

Heliman

USA

Thank you Stan that is some great advice.
Matt

02-22-2008 Over year old.
mpk000

Heliman

USA

Also thanks to you OU812 I was thinking of using the wood 315 blades, but that does not sound like the best way to go due to the weight.

02-22-2008 Over year old.
coptercptn

Key Veteran

Mesa AZ. USA

also very true on the prototype...You NEVER wanted an aft CG!!!

bad things can happen quickly.

Home of the "Sea Cobra".....

02-22-2008 Over year old.
doorman

rrProfessor

Sherwood, Arkansas

Glad To Help Out.....

Another thing that I found out was that you do not want the pitch to go below 0 degree's... my low pitch is set at 53% on all curves including the HOLD.. (ask me why the HOLD is in caps!!!)And 100% in the swash mix.....
And then it will be a very shallow curve, since you do not need a lot of travel on these heads... the 53% will vary per set up, but that keeps the follower from going over center and then jambing... and I promise, at 0 degrees, it will still come down just fine!!!!
The instructions are minimal at best, but also check to see if you are setting at 45 degree offset or 90 degree... this is crucial to the proper operation... the 4 blade is at 45, but I am thinking the 5 will be at 90 or straight on... then you have to take one blade and align it directly down the tail shaft... then move the fore and aft and rotate the follower until you get little or NO MOVEMENT in the blades that go to the sides...this will take a little time, but the slightest movement of the follower can and will make the difference between success and failure to fly properly...
I also use - (JR) expo to make the elev more sensitive (about 10%) at the center...the ail is at -5
Take your time and it will all come together and it will fly nicely... the timing is different then flying a 2 blade but just feel it out and move slowly with it until you get the feel, and each will adjust it to their own "feel"...
Good Luck, Stan

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations, Haiyin Battery

02-22-2008 Over year old.
coptercptn

Key Veteran

Mesa AZ. USA

On the prototype CH-53's (with a 6 blade head) the Gyroscopic prcesion was at 90 degrees...so I'm guessing the 5 would be really close to that also.
So, Doorman, you are measuring the pitch @ 90 degrees from head on? and what is your total pitch? Also you say 53% at Hold..I guess I'm Thick this AM but 53% of what? throttle? or pitch?

Thanks..

Home of the "Sea Cobra".....

02-22-2008 Over year old.
jfint

Senior Heliman

Simi Valley, CA

Matt, you maniac! gonna have it ready this weekend?

02-22-2008 Over year old.
HOMEPAGE  
Subject Heli

Heliman

USA

mpk000

Can't wait to add the 5 Bladed Heads to the Helicopter.


Positive Communicating Appreciated

Mahalo Nui,

Subject Heli

02-22-2008 Over year old.
Super-Hornet

Veteran

Singapore

Ehh.. If I not wrong, 2 bladed or 3 or 4,5,6 or 7, the phase angle per blade is 90Degree. (If we do not use any electronics phase angle offset)


SH

02-22-2008 Over year old.
doorman

rrProfessor

Sherwood, Arkansas

Phase Angle

The 4 blade is at a 45 degree not 90... the instructions tell you this...and I am not using any electronics mixing....
As for the 53% that is my pitch curve low point... or 0 degrees at low stick without changing the "rex" linkage to the swash...and I am running a high of about 9-10 degrees....and I have all all positions the same, including the hold so that when you land and hit hold it does not go below the 0 degrees is what I meant...
Yes measuring pitch at a 90 degree to the main shaft and the heli...
I am traveling and don't have my info on the 5 blade with me, but the instructions that come with the head will tell you where to position it and they are designed for using no mixers....
Hope this helps...

Stan

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations, Haiyin Battery

02-22-2008 Over year old.
Super-Hornet

Veteran

Singapore

Instruction manual telling u 45Degree?

Can you post that instruction manual? Or where can I download that instruction manual. Thanks

SH

02-23-2008 Over year old.
mpk000

Heliman

USA

Jflint

We are going to try and have them going for this weekend.We test flew one of these today and Subject Heli had his hands full I think we got it though. I tried the Wood blades and they are definately not the way to go way too sensitive. we used the carbon 315s and subjet heli seemed to do well with them. I will see you out there and we will see what happens. One thing I can tell you is these are definately not for beginers.
Stan thanks again we used your advice and it helped allot.
Matt

Subject Heli why dont you put your two cents in on how the test flight went.

02-23-2008 Over year old.
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t-rex 450 scale head

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