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> Helicopters & Parts > Helicopter Kits > Electric Helicopter Kits


HK-450TT PRO V2 Flybarless 3D Torque-Tube Helicopter Kit (Align T-Rex Compat.)

HK-450TT PRO V2 Flybarless 3D Torque-Tube Helicopter Kit (Align T-Rex Compat.)
HK-450TT PRO V2 Flybarless 3D Torque-Tube Helicopter Kit (Align T-Rex Compat.)

Our most popular HK450PRO helicopter kit now offered in a flybarless torque tube version!

HK-450TT PRO V2 Flybarless CCPM 3D Electric Helicopter Kit (Align T-rex Compatible). Modeled on the famous and proven Align T-Rex 450PRO V2 Flybarless helicopter kit.
Take a close look at the head and tail of this awesome machine. It's ultra light, yet rigid design is strong enough for even the most skitzophrenic of 3D helicopter pilots!

When comparing helicopters, carefully look at the tail and head unit. Our 450PRO V2 Flybarless is FULLY 'PRO' and does not use parts from previous models.

*Now featuring an upgraded metal tail slider and tail slider control arm!

• Newly designed low wind resistance flybarless rotor head assembly with reduced distance between rotor head and frame, effectively lowering the CG for better 3D performance.
• Single piece integrated design of main bearing block and servo mount.
• Single piece integrated design of anti-rotation guide and gyro mount.
• Single piece integrated landing gear.
• High precision flybarless head system.
• Newly designed high resolution swashplate.
• Single piece battery mount with integrated canopy mount designed to bring CG closer to disk plane.
• Highly rigid frame with single piece carbon side and bottom plates.
• Highly efficient shaft driven tail design.
• Weighted tail rotor blade grips to repel centripetal forces.
• Straight-up in-frame alloy rudder servo mount for improved geometry and better CG.
• Newly designed aerodynamic canopy.
• Newly designed high strength main blade grips.
• Upgraded metal tail slider and tail slider control arm.


Length: 635mm
Height: 230mm
Main Rotor Diameter: 710mm
Tail Rotor Diameter: 158mm
Motor Drive Gear: 13T
Main Drive Gear: 150T
Autorotation Tail Drive Gear: 106T
Tail Drive Gear: 25T
Drive Gear Ratio: 1:11.5:4.24
Weight (w/o power system): 530g
Flying Weight: Approx. 640g

HK450TT PRO V2 FBL Helicopter Kit
Glass Fiber Main Blades
Tail Blades
All Necessary Hardware

Required items:
Brushless Outrunner Motor
Flybarless Control Unit
Lipoly Battery (2200mAh 3S)

PRODUCT ID: 155000030

This product available from a warehouse near you!

Weight: 997g
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Price  $56.69

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Further discounts available for registered & logged-in customers.
This item is on a flash sale right now.
The standard price is: $62.99.
Sale ends in:18hrs
 Customer rated
Total of 131 discussions.
Peter  1 points - 2/2/2015
Can anyone confirm how the one way bearing holds up in these also tail and main gears on this helli. Is there any parts that need to be upgraded?
 hawko 19 points
One way bearing good only had to replace one and I fly every day 7 to 10 battery's and yes you will need to replace main gear unbella gear and tail gear with align or what I done was a belt conversion kit but still a great cheap heli my favorite bird to fly
j_keiter  7 points - 1/25/2015
My tail rotor has around 5 degrees of CCW tail rotor pitch when all arms are adjusted perpendicular and slider in in centre of possible range. I have verified blade grip directions compared to align 450 photos. Only thing I can think is wrong is shaft length is too short. I measure 47mm. 50mm or more would fix problem. Can someone measure there torque tube tail rotor shaft length for me to confirm 47mm is stock/correct. Thanks Jason
 hawko 19 points
Yes 47 mm
hawko  19 points - 1/22/2015
hi up date on my hk450pro 3 cell 2200 nano tech battery justgoflt th500 motor yep60amp esc tarot zyx fbl 4 turnigy tgy-50090 analog servo and belt drive tail align main gear dfc rotor head and main blades what a cheap great little helicoptor
hawko  19 points - 9/11/2014
very happy with this heli just on 25 hours of fight time iv whore out bearing in a trunigy 500x 4000 and a few parts in this heli but for a cheap kit i love it here is a video of it in flying *******
westvind  2 points - 9/9/2014
This kit came with imperial-sized screws (those small ones). I.e. 1.5mm hex screwdriver is too loose and 2mm doesn't fit. I had to purchase an imperial-sized hex screwdrivers set like this one
.asp?idProduct=49405 P.S.
This is my first heli kit so it might be obvious to more experienced modellers.
Customer Reviews
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Overall Rating
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This kit is excellent value for money. The new head is smooth and works well. The swash is very good and smooth, The tail has a new type slider on it and mine has no slop, a first on this size of heli, the tail holders seem to have a counter weight system built into them. I am amazed at what you get for the money. The blades that came with mine are good quality and usable.The torque tube seems a good quality unit and the drive is free from friction and hopefully static. All in all I am well pleased with the kit and look forward to getting it in the air.

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got this today, it is such a difference to my HK450 V2, looks ace. Te screws are a lot better than on the v2 models. The FBL head looks also better than the one I have for my v2 but I did not fly it yet.

I'd prefer if they would include a glass fibre canopy but will just get one with my next order.

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Finished the kit assembly and have now flown around 15 flights, sport flight and a lot of flips/inverted/rainbows/loose tictocs/punchouts etc Quality overall is pretty nice and looks great in black, one carbon frame half is rattier than the other (as usual with hk) but the mechanics of the frame, head and most of the tail are really solid. Head is rigid with no slop and feels nice and high quality. The all metal tail slider mech is a nice touch although the one problem I've encountered so far is that the brass tail slide bushing broke in half during the first test hover meaning the tail control arms weren't in contact with the slider anymore. Lost tail control in a low hover because of this so watch out. Never had this problem on other clone 450 tails so hopefully it's just my particular part that was a dud. Other than that the heli is great and flies insane with the following loadout. Tarot/HK ZYX 3axis flybarless controller TP 450-Size 2415-06T Brushless Heli Motor 4400kv get this motor it's awesome (13t pinion = insane headspeed power no bogging at all at 12 degs pitch) Hitec HS-65MG on cyclic (very nice, smooth and powerful although corona 919MGs would work as well for a lot less) HGD digital 261HB for tail Hobbywing Platinum/Turnigy K-force 40amp esc Orange Rx Sattelite Nanotech 3s 45-90c 2200mah lipos (5mins flight if doing 3d type headloading continuously and everyth

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the quality is amazing. the head has absolutely zero slop in it, is very rigid, and smooth moving. i can tell it will be great for 3D. i still need to check for WARP in the gears but the tail gears came slightly warped, a few teeth are stripped at the root and is not smooth at all. yours may come without it bent like that, but the hk helicopters usually just need align gears and youre good. the TT gears are usually soft and would not recommend flying if they dont seem in perfect shape. to be honest, i did not like the 450 pro i got last year but this one looks like a step up. will be using my zyx and nano techs!

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- The carbon fibre frame is a little bit rough on the edges. Need a bit of sanding. Appear not as well made as HK450 V2 frame.
- The flybarless head looks very well made. The swashplate is very good, tight tolerance, not as loose as V2 swashplate.
- Torque tube tail end is good too.
Can't wait to fly it !!

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