Rob's Hangar

I had some problems with the tail not holding on pitchpumps with the Walkera 4G6 Helicopter. I’ve tried adjusting the rudder extent pot on the RX but even at maximum the tail wouldn’t hold. I always had some 20° turn on pitchpumps. I also played around with the gyro sense but that didn’t help either.

UPDATE: I’ve found that the pitchslider on the tail had too much play and caused the bad tail reaction. See my other post and vid on repairing the pitchslider. Still the longer carbon tail blades give a bit more power and a slighly better performance over the plastic ones.

I figured the tail might simply be too weak. So i made some tailblades from 0.6mm flat carbon, the same shape as the original ones, only about 5mm longer. They are 0.27gm before sanding and 0.26gm after sanding the profile and clear/white color (original plastic 0.3gm). The tail holds very well now, much more power. Also the piro rate is much higher now, i could turn the rudder extent way down and also decreased the D/R setting for the rudder channel. Only drawback is the increased risk of the blades hitting the ground – but im planning a new, longer carbon tailfin.

4G6 carbon tailblades

profile sanded, finished with clear coating

4G6 with carbon tailblades

Original tailblades and my design

comparison

carbon tailblades on the 4G6

PicooZ Pluto (Havoc) actuators controlled by servoboards and the Walkera 2406 Rx (2.4GHz). Centering magnets used. Second vid down is a little flight demo.

Component weights

The lady is flying. 100mAh lipo, Walkera 5G6 4-1, servoboard mod proportional tailmotor for 3rd channel. 6:30 flighttime. Based on the famous IR Toy Airwolf helicopter.  Build log here.

Before I start: This mod really does make a huge difference. It will make the 4#3B helicopter responsive like never before, self stabilizing and not rolling in any other direction than your stick input. See my videos here.

But only if the flybar angle is set exactly to 45°. If its not, you will end up with the same performance as in the known Bell/Hiller Mod or the other available b/h mods with the original 90° flybar. However with this mod the flybar angle can be set. I’m working on an improvement in how to set the angle exactly AND have it stay that way (thinking liquid metal, loctite, epoxy, bigger screw…) Maybe someone will come up with the perfect solution.

Bell Head on the Walkera 4#3B

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First step towards building a brushless direct drive 2.4Ghz gyro-ed PizooZ. The shaft of the HP03T 2.9 BL outrunner was replaced by a 50mm 1.5mm shaft that holds the picooZ main rotor. The picooZ rotor head was drilled to 1.5mm (stock is 1mm). The HP03T is normally used for the Walkera 4#3B brushless tail conversion. The motor is power by the flea converter.

Thrust at mid-stick is about 20g – about right, remains to be seen if the revomix works out.

I’m aiming for about 15g AUW for the 2Ch – if it works as planned this will be the platform for the acutator cyclics mod (see post here).

Amazingly quiet!

Just did the first testflights with the Airwolf coax helicopter – made from the well know RC toy heli, the IR, 3Ch Airwolf.

inside look: Airwolf 3 Ch 2.4GHz gyro-ed

The electronics were removed and replaced by a Walkera 5G6  4 in 1 (RX2402) which has 2 brushed motor outputs, 2 servo outputs and an onboard gyro. The 4 in 1 goes into the body quite nicely – only little cutting was necessary.
The heli is now powered by a 50mAh Zippy lipo – maybe a 70mAh or even 110mAh will also do.
Because of a broken rotorblade tip i had to cut the blades back – not good, because lift is decreased significantly – now im waiting for new blades.

The third channel is used to controll the vertical tailrotor. This rotor achieves forwars and backward flying. The motor is powered via a servo board (PCB) which instead of driving the servo motor drives the tailmotor.

IR Airwolf RC Toy: 23.1g AUW, 4:30 flight time

Original IR Toy specs (measured)

• 1s 3.7V 65mAh Lipo
• 23.1 g AUW
• Flight time ~4:30 minutes
• Main rotor diameter 132mm
• Mainmotors 2x 6mm Micro coreless
• Hover headspeed, upper rotor ~1700 RPM
• Max thrust ~30g (forget about Newton for a sec.:D)

Most powerful setup I’ve ever had.
Max. thrust measured 146g with 450mAh zippy lipo.

RX2406B, removed original power cable
C06/ADH50L V2 21 T pinion w/ XP 7A ESC
HP03 2.9g w/ nanoheli flea tail, Q-tailblades
customized 4#3B V2 frame for 3mm boom and LG
central powersupply on mainframe w/ extra socket for additional plug-n-play electronics like onboard camera, led-system etc.
custom 3mm boom w/ jasonjetski tailcase, no fin
custom “lowrider” LG
custom CF “no-flex” blades w/ about Q lift (from CQE Flash)
custom CF lipo mount for 450 or 600mah zippy
59.2 AUW w/ 450 zippy

i just made some outdoor video with an onboard 5.9 Gramm Spycam board. Total weight of the 4#3B with video is about 62 gramms. Around 4-5 mins of flight time. it feels a bit heavy.

i used a 4GB 20$ Spycam that comes as a pen. removed the “pen” and used only the PCB/Board. Its fun. i need to get the camera angle more upwards – a little bit to much grass in the vids, but some people to.

where to get the cam, just google spycam pen, amazon, ebay, you can get them anywhere.

The camera needs to be cut, the pcb taken out, the camera lipo needs to be removed and powerd by the heli lipo. and the sensor-chip needs to be brought to an 90° angle.

Maiden flight of my PicooZ (PicoZ, Pico-Z, Havoc) with 2.4 Ghz Walkera RX2406. only 2 Channels Used. Super smooth flying, no cyclics, foward speed is only controlled by center of gravity. AUW 12.4 g. held together only by clear tape.
thanks to EQMOD on RCGroups who did this mod first.

for the cyclics, im planning to use the actuator / servo board mod, here is my test-bed video:

Just a test of posting some images…

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