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Heli Wholesaler . 3D Heli Depot . JR-Spektrum

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e-New & Emerging Electrics > Dragonus 2 Pro
 
 
threedi
Heliman
Location: UK

Hi
I have just received a Drogonus 2 Pro Kit and thought I would share the build and detail the kit with those interested in this model.
I purchased the Heli from Flying Hobby in Hong Kong and opted for the full bundle that includes everything required to get flying (except a transmitter). I will be using my JR PCM9X 2. The Kit cost $730 and included Dragonus model, Gy401 Gyro, Aplus 2250mah Bat, Futaba R146iP PCM receiver (without crystal),Quark 33A ESC and servos (one digital for the tail). The servos are TMF S-09 and a HDS-877 (unknown manufacturer). The kit was ordered on the 8th and arrived in the UK on the 11th. Total UK price £414.00 (including shipping). The model on its own is $439 (£249.00) excluding shipping.
Good news for UK buyers is that Skyline Models are now importing the Heli and will carry a good line of spares.
07-11-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

Here is a photo of the box and canopy.

07-11-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

The canopy is not plastic (its GRP) so should be easier to paint.
Here is a photo of the parts lay out. I have started the build and noticed that a bag is missing (M-B) containing the main shaft, fly bar and some control arms. Have now contacted the supplier to get these parts sent over. I will continue the build while I wait for the missing bits.
07-11-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 pro

First off is the assembly of the main rotor hub and blade holders, these are all metal parts as standard and have a better feel to them as compared to the T-Rex SE, linkage balls are of a high quality and the whole assembly looks and feels realy good. Interestingly the feathering spindle dampers are the same as the T-Rex (and I have noticed a few parts that are the same throughout the kit). The first thing to notice is that all bolts and screws are Philips heads, NO allen bolts at all. I am not convinced that this is ideal as Allen heads give more grip as compared to Philips.
I also seem to be left with 2 small washers that are not listed in the build diagram. The instructions are mainly in Chinese (I think) but are easy enough to follow if you have built a Heli before.

Here is another Photo.

07-11-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

I am doing step3 next as I am missing parts for step2.

The washout base is the same as a T-Rex, the mainshaft diameter and flybar control arm holes are the same. The black metal Dragonus base fits direct to the main shaft without the normal T-Rex style brass colar.
07-11-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

Hope I'm not boring everyone with this post but this is turning out to be a realy interesting heli. Step 4 is seting up linkage lengths and the first thing that hits you (makes you smile) is how easy the rod ends screw onto the rods. My T-rex was a nightmare with this and you could hardly get the rods to go into the ends. These bite first time and tighten up perfectly. Add to that, they snap onto the (milled) balls perfectly without any fricton, just snap and they hang swinging perfectly. The quality of this kit so far has been great (pity about the missing parts). I have had T-rex se parts that would not fit together or would bind up, nothing like that so far with this Heli.
07-11-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

Have had to skip stage 5 as it involves building up the main head with shaft and I am missing those bits.

Stage 6 Tail Box.

Wow, this is a great bit of design. The tail gear box is a one peice construction with 2 screws that hold the tail shaft bearing in place. By undoing these screws it is possible to drop the tail shaft out of the asembly. The parts whent together very quickly. The hardest to fit were the belt tension bearings, but once in will never need to be removed (unless you crash). The parts count is way down on the TREX SE tail and are much easier to fit. The tail pully moves very smoothly, a brass colar runs against another high quality ball joint.

A very impressive tail construction.

No complaints as yet with this kit.
07-11-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

Step 7

Tail blades boom and fin asembly. The kit comes with Carbon Fiber tail blades, boom and vertical fin as standard. The tail blade holders have one side threaded so that the bolt threads through them as well as the final nut on the outside.

I have to say that at this stage I am very impressed with the quality
and ease of construction, if it flies half as well as it builds its gonna be a great Heli.

07-11-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

Step 8 Lower frame construction.

The parts here are Carbon Fiber and pressed metal, in fact apart from the the main gear and linkages there are NO plastic parts on this kit.

The frames bolt together with a set of small philips head bolts and nuts, I applied red locktight to these as I was a bit concerned with so many nuts and bolts being present in the construction. The kit was short of 2 bolts for this stage but fortunatly there were some in the spares bag supplied.

07-12-2006 Over year old.
 
 
LogoHeli
Veteran
Location: Brisbane, Queensland, Australia

Looks really nice threedi. Is it around the same size as the trex?

Keep up the good work mate.

heli+ground/heli+tree/heli+bush=not good
07-12-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

Hi

Heli is 660mm from nose to tail rotor centre. Rotor diam is 723mm.

So its in the same class.

Gear Ratios are: 1:11.5:4.6/1:10.7:4.6/1:10:4.6 with a 150t main gear.

About 20% cheaper on parts.

I'm impressed so far. Have just finished main frame asemble, that was a bit of a pig but OK now its finished.
07-12-2006 Over year old.
 
 
J2M
Senior Heliman
Location: UK

threedi,

Great information on this interesting heli. Please keep going!
07-12-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

Step 9

Top frame construction, as you can see from the manual there looks like a lot to do here and with nothing writern in English its not all that easy to look at. In reality there are only a few parts to assemble, the biggest pain is locktighting tiny nuts onto the ends of tiny bolts to hold most of the frame together. One thing to point out is that the screws used throughout construction are very high quality. The screwdriver has slipped on a few occasions and done no damage to the screw head, unlike the much softer T-Rex items that damage easily.
On reflection this stage of the build was not all that bad and the frames go together very well.
07-12-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

Step 10 Combine Upper and Lower frames.
The manual states that bag F-C should be used but the correct parts are in bag F-D. Attaching the 2 frames is relatively straight forward and the parts fit very well together. The manual makes no mention of installing the motor but there is very good access from both the top and the bottom of the frames. This stage involves adding spacers and struts to the frame in order to join the 2 parts, similar to the TREX SE frame build (but a bit more complicated).
07-12-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

Step 11

Main Gear Assembly.

This reminds me of the Raptor gear assembly and is one of the things that interested me in this Heli from the start. The tail belt is driven directly from the main shaft and passes through to belt tension bearings before it travels up the tail (shown in frame detail in earlier post). The construction is very simple. The one way bearing comes pre-fitted to the mount and the mount can only be fitted one way into the main gear its then just a case of locktight on the three screws, inserting the one way bearing shaft and the tail drive gear. The one way shaft has a hole at the top and the main shaft must have a hole to correspond with that (main shaft is part of missing bits). The whole assembly is locked to the shaft from this point and via the base collar when fitted.
07-12-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

Step 12

I cannot complete all of this section as I am missing parts that are on order. I have used a TREX main shaft (it cannot actually be used in the build, but fits the bearings) to allow me to mount the main gear and check belt tension. Belt tension is very easy to set and the 2 long screws that lock the tail boom really do cause the split ally mounts to grip the boom tight, one holds the boom easily allowing the other to be locktighted and set. It may be possible to over tighten these fittings and thus cause damage to the boom. The direct drive to the belt from the main shaft looks great and the belt travels between the back pulleys perfectly. Boom supports and horizontal fin are carbon fiber and aluminium. I didn't mention it before but the only other plastic part on the Heli are the all in one skids. It was quite difficult to get the 4 self tapping screws to go into this tough plastic and there is not a lot of room against the main frame to get a screwdriver in.

I can't really do much more until the other parts arrive. I will post some other details about the manual while I wait for the final bits.

Hope this has been of interest so far.

[
07-12-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Dragonus 2 Pro

Here is a comparison image of the Dragonus against a TREX 450SE

07-12-2006 Over year old.
 
 
brianr058
Heliman
Location: Sacramento, CA

dragonus2

the kit looks verry nice, I have a aplus300 and was thinking of getting of those.can't wait to see it complete and maybe a flight video or two
07-14-2006 Over year old.
 
 
threedi
Heliman
Location: UK

This is an update on the linkage setup and a comparison shot between the trex links and the Dragonus.(Trex to the right).
The Dragonus links are very good, I have very often screwed the rod all the way through the trex links but because the Dragonus links are that little bit thicker you can feel the end and not over tighten the link.
The manual isn't brilliantly clear about its rod lengths as you can see from the repeated use of the number 4 for 2 different rods.

07-14-2006 Over year old.
 
 
threedi
Heliman
Location: UK

Here is another example of the quality in this kit.
The photo shows 3 brand new ball links, the left is the TREX, the middle the Dragonus and the right is a Quick UK hardened steel ball upgrade for the TT Raptor.
Its interesting to see the quality difference between the Trex and the other 2. Regardless of whether you like the Dragonus or not it may well be worth upgrading a Trex to the Dragonus ball and linkage sets.
The Dragonus is a first generation Heli, it hasn't evolved yet, compared to the Trex's 4th-5th revision I think the Dragonus is on the money from the start.

07-14-2006 Over year old.
 
 
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