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It's a Walkera Dragonfly 36#B


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Burgess
Extreme 3D
Extreme 3D


Joined: 27 Mar 2012
Posts: 1073
Location: Wales

PostPosted: Wed Jul 11, 2012 7:18 am
PostPost subject: It's a Walkera Dragonfly 36#B
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Here's my latest project modified Walker Dragonfly 36#B

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T-rex 450 clone canopy I did a none complicated paint job on this very inexpensive canopy I think it's a Hobbyking canopy, nevertheless, it's almost indestructible.
Walkera 36 main frame
Align silver boom
450 Carbon boom braces
Flasher tail gear-box and rotor.
The skids T-rex 450 legs with Flasher skid-pipes
Walkera 60#B Stabilizers
Scratch built battery carrier.


The main rotor consists of Walkera 36 main shaft with pitch slider block and Creata 400 Washout arms, Walkera 36#B swashplate, and modified T-rex 450 clone rotor components.


Electronics:
30A RedBrick ESC
Turnigy 450 Heli Outrunner 3500kv 370w 2837B motor

Servos:
Cyclic Hextronic HXT900
Collective Tower Pro MG90S
Rudder EMAX ES9207

Gyro Walker WK-G010 AVCS
I've now fitted Radiolink 2.4 ghz 6 channel receiver.
I have cheep glass fibre rotor blades on at present, they're OK, but not as efficient as the carbon fibre blades fitted on two of my T-rex 450 clones.

Here is a section view of the carbon fibre blade construction:


As can be seen they have very thing trailing edges, and while they work OK as they come, reshaping the leading edges to blend in the narrow flat with 600, 800 grit wet n dry to produce a good leading radius renders them more efficient. My 450's get light on their skids at 4.5 degrees pitch.
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brett546
Charging
Charging


Joined: 13 Dec 2012
Posts: 2
Location: Rotterdam

PostPosted: Thu Dec 13, 2012 4:48 pm
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A nice little four-channel helicopter.There are also some neat upgrades for it, to increase durability, performance and give it a more large scale helicopter look.It's upgraded metal rotor head and metal swashplate little heli will amaze all rc helicopter lovers.
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Burgess
Extreme 3D
Extreme 3D


Joined: 27 Mar 2012
Posts: 1073
Location: Wales

PostPosted: Thu Dec 13, 2012 8:02 pm
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brett546 wrote:
A nice little four-channel helicopter.There are also some neat upgrades for it, to increase durability, performance and give it a more large scale helicopter look.It's upgraded metal rotor head and metal swashplate little heli will amaze all rc helicopter lovers.


Hey Brett Wilson,

The Walkera Dragonfly 36, and the 36#B have always been six channel 400 size helicopters.

This Walkera Dragonfly 36#B of mine, has been modified, it is now a 450 sized six channel Radio Controlled helicopter.

The Exceed G2 400 is in fact the Walkera Dragonfly 36#B 6-channel with a face-lift.
http://www.youtube.com/watch?v=j26_96n_Ygo

http://www.youtube.com/watch?v=SnwHY87bVTY

Product knowledge is a wonderful thing to possess.

3DT Tony the presenter in the second video, knew nothing about how to use the V1 and V2 rotary controls for programming the transmitter.

SPAM and EGGS...anyone?
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admiral
Extreme 3D
Extreme 3D


Joined: 20 Mar 2009
Posts: 1098
Location: Brisbane, Australia

PostPosted: Fri Dec 14, 2012 2:40 am
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Nice job there Burgess, how does it fly ?
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Burgess
Extreme 3D
Extreme 3D


Joined: 27 Mar 2012
Posts: 1073
Location: Wales

PostPosted: Fri Dec 14, 2012 9:19 am
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Thanks Keith,

It flies really well, and that's down to the Walkera NOR rotor head architecture. With direct connection between swashplate and flybar-control frame, and no electronic swash-plate pitch-mixing there is no interaction, the result is very accurate cyclic control.
With this 3500kv 370watt motor, collective response is crisp, it lifts-off straight up into hover with little drift to port.
This 30A Redbrick ESC though inexpensive has a really good soft start, no snatch or extended ramp up.

However, with only a 1300mAh LiPO, flight time is quite limited.
Consequently I'm looking to optimising overall performance, by increasing the flight duration and reducing the AUW.
I'm using the 1300mAh LiPo simply because I use them in my other two 36#Bs.

So, modify the battery carrier to accommodate an 1800mAh LiPO.
Trade-off the weight gained by: -

i) fit a lighter motor with lower current draw and higher kv;
ii) fit cooler running ESC (reduce watts lost to heat);
iii) replace some or all CNC alloy rotor head components with plastic;
iv) possibly fit semi-symmetrical blades.

May need to relocate the horizontal stabilizer rearward to reestablish CoG.
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Blues4dog
Hopping Maniac
Hopping Maniac


Joined: 17 Sep 2011
Posts: 41
Location: Tasmania. Australia.

PostPosted: Tue Dec 18, 2012 5:04 pm
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That is a very interesting rotor head !!!!
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