RCU Forums - View Single Post - HK-450GT CCPM Alloy T-Rex compatible - Part III
Old 08-19-2012, 04:30 PM
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mnemennth
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

Dangit - I broke the internet again. Should I get some superglue?

ORIGINAL: ingleburn

Well yesterdays sim time did me the world of good.

went out this morning and had a great time flying a lot smoother and getting further away.

The dreaded right turn curse returned though when I started flying faster and you could hear the tail blades protesting.

Time to sit down and check everything over again but I did notice a bit of slop between one grip and the hub so for a start Im going to replace it with this.http://www.rc711.com/shop/metal-tail...rt-p-4558.html

Other than that might play around with the software and see if I can get it sorted out.

One other thing I just thought of was Im using these tail blades.www.hobbyking.com/hobbyking/store/__14935__450_Size_Heli_White_Plastic_Tail_Blade_pa ir_.html

Wonder if I should try a pair of the stock ones and see if it makes a difference.
burn-

The tailrotor you linked to is a 450Pro style unit. The blades you linked to are also 450Pro; length from pin to tip should be +/- 63mm. These blades have approx 40% more surface area than the V1/V2 tapered style, most of it at the tip, and they aren't feathered. They are gonna howl like a SOB in comparison under heavy loading, because they're moving almost twice as much air. This can cause your belt to skip too, if you've gotten lazy about checking belt tension, which can also make an obnoxious racket. Don't ask how I learned THATlesson.

If you're going to use the 450Pro tailrotor, make sure you use a tail servo rated for at least 1.8KG pull; between the larger blade area and the increased rotational massof the 450Pro tailrotor's gyro weights, that tail needs a lot more torque to push it around. Align used a DS520; it's rated 1.9/2.5KG at 4.8/6.0V.
[EDIT]
Looking at the photo, I can't say the CNC quality of that particular tailrotor looks any better than what I've gotten from LeadersHobby; they have a complete Pro tail for $4.99 here: https://www.leaderhobby.com/product....=9394001220449 Unless you're set on that color it seems like a better deal, and they're both coming from China. Better hurry, though; only 2 left in stock. Myself, I'd just replace the bearings unless the rotor I had was already damaged.

On a side note; did you see that Goblin-clone canopy/fuselage kit? http://www.rc711.com/shop/alzrc-devi...it-p-6590.html



Good hunting,

mnem
I forgot.