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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › which head for the radikal???
01-22-2010 11:59 PM  8 years agoPost 1
Larry

rrApprentice

SE Florida

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so i want to get the radikal...

i am totally confused on lt vs hd head...

what is the pro/con of each over the other??

also g10 vs carbon??

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01-23-2010 01:21 AM  8 years agoPost 2
MAXHSHV

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,mn usa

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I see you posted the same thing on HF so i will forgo repeating it, but for the g10 verses carbon,I like G10 for it's extra vibration absorbion ability and also cheaper to replace in a crash.

Century heli rep. To much power is never enough.

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01-23-2010 02:16 AM  8 years agoPost 3
beavis1

rrKey Veteran

New York state

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Don't forgo the answer copy and paste it

I can not decide myself having had the predator one forever and loving it I am not sure if the weight savings is worth droping the rigidity of the HD head. I must say in the know but on the fence

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01-23-2010 02:18 AM  8 years agoPost 4
Rodney

rrVeteran

St.Cloud,Florida

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The LT works great so far for me. If I was going with a camera ship I would go for the Predator head. But if you are looking for the best 3D stick with LT or Metal 50 head for weight savings.

Dx7 With Ion Power Supply. Why use anything else.

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01-23-2010 02:45 AM  8 years agoPost 5
beavis1

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New York state

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Hey thanks Rodney ! Good to hear from you !

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01-23-2010 06:11 PM  8 years agoPost 6
oldfart

rrProfessor

Vancouver, Canada

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I agree with Rodney. The LT head would be my choice. And it also has the advantage of being more "blade friendly" as it allows for the use of a bigger blade selection.

Beavis1

The rigidity of any rotor head, is not just related to the rubber dampers and composition (metal or GRP plastic) of the head components. It is also related to the flex (before bending occurs) of the steel spindles (Note: try bending one and see how far you have to do so before it will bend, and not spring back into its normal position) , the rotor hub/yoke and the flex in the swashplate stars and other control system components

I have tested properly molded GRP blade grips that flexed less then some spindles they were attached to!! Also if you want more collective pop from the Hawk (assuming you are using a good hi-torque digital servo), just reinforce or double-up the collective arm, and you will see a big difference.

As the LT head has a fairly beefy spindle (7mm), you will find it much stiffer then the 6mm one used in the 50 nitros which weigh in at more then a pound less ready to fly. The LT head's CNC rotor hub is also adequately rigid.

These are why Rodney and so many others find the LT head does well in 3D at relatively high rotor speeds.

Where you may want to improve things, to insure a more rigid control system, is to replace the stock swashlate, which has a metal inner star and a GRP outer star (as on the Hawk & Swift 16 & 550) with the all metal one from the Raven 50/NX50/Predator. I think a lot more would be gained from that change.

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