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> Helicopters & Parts > Helicopter Kits > Helicopter Kits by Brand > HK RTF, ARF, Helicopter Kits
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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 Quantity: 
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 Customer rated
Total of 122 discussions.
Wolfgang  4 points - 7/9/2014
Ist er T-rex kompatiebel ?
 LasseK 1440 points
Ja, da ist er. Die wellen sind nicht so gut, mann soll brauchen die von Align.
krea3333  21 points - 6/2/2014
 LasseK 1440 points
 hawko 10 points
Why can't I post a review
 LasseK 1440 points
After you place an order you have 45 days to post your review, after that you normally can't. You can write the review in the discussion section here though, I have done so multiple times (better than not writing at all :-) Cheers!
Ron  2 points - 5/30/2014
Does anyone know the shaft diameter of the main rotor? Thanks...
 LasseK 1440 points
It's 5mm.
jorge  1 points - 5/21/2014
este modelo viene con el control??? HK-450TT PRO Kit V2 3D Flybarless Torque Tube-Helicopter
 LasseK 1440 points
Amigo, este modelo viene sin nada! Tienes que comprarlo todo: motor, controlador de motor, servos, controlador the "flybarless", receptor, baterias, transmisor, cargador de baterias etc. Mira en la seccion "RELATED ITEMS" encima, ahí* ves mas o menos lo que necesitas. Suerte!
j_keiter  7 points - 5/3/2014
I measure only 12 degrees max physical range clockwise'against main blade torque' tail rotor pitch . I measure 40 degrees CCW' with main blade torque'. Seems backwards. Can anybody see an issue?? I'm stumped!! Shaft is about 47mm long. Seems I would need about 50mm to center the pitch range.
 j_keiter 7 points
I figured it out. The links from the tail rotor slider to the grips were flipped backwards. This caused the grips to be backwards which caused the CCW or against torque yaw to have the range '12 deg' that was meant for the CW or with torque yaw. Last thing to do is reverse your rudder servo direction on transmitter to account for the grip flip. They came this way from factory. At least I think they did. Of course I'm so old now I cannot remember what I had for breakfast this morning:(
Customer Reviews
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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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