The ZULU trainer is an extremely light-weigth and durable canopy for the Walkera 4G6 / 4#6. At only 2.4g (0.85oz) it offers a significant weight saving and performance increase compared to the stock canopy.
ZULU trainer
ZULU trainer
ZULU trainer
ZULU trainer
ZULU trainer
Just got some very nicely machined parts from Hardy, including the new pitchslider and plastic baldegrips inlays. Now there absolutely no play in the pitchslider anymore. Here is a video of the double-bearing pitchslider, i also have a single bearing version which is lighter but has a little bit of play due to the use of only one bearing.
I have also installed chinese weights on the bladegrips which reduce the force needed to pitch the tailblades dramatically.
Walkera 4G6 with HK250 tail rotor grips
Just tested the Walkera 4G6 with HK-250 GT tail rotor grips and hub. Very nice!
The HK250 tailshaft is 2mm so i had to use some shrinktube on the 4G6 tailshaft which is only 1.5mm. I removed the hub from the original Walkera tailshaft. With shrinktube, fit is perfect and secured by a grubscrew in the hub.
Walkera 4G6 with HK250 tail rotor grips - top view
The Walkera metal balllinks have been epoxied into the bladegrips. I also made some new 1mm CF tailblades with sanded airfoil. Had to use a little piece of 0.5mm CF as a space as the HK-250 GT tailblades are 1mm.
Walkera 4G6 with HK250 tail rotor grips - side view
Additional weight is 1.2 gm. Result is a perfectly solid tail. Only drawback is that the pitchslider trave is slightly reduced (by about 2mm), resulting i slower piro rates. I might make a custom tailshaft from 1.5mm steel which is slightly longer than the original walkera shaft.
Now i only need the new pitchslider from Hardy and this will be the perfect 4G6 tail.
size comparison
Also with Hardys blade grip mod (inlays) i will do a direct comparison between the modded Walkera plastic bladehoders and the HK-250 GT parts.
Syma S026 CH-47 Chinook ouf of the box
Just got a Syma S026 CH-47 Chinook off ebay – nice little machine.
Now if it only had a gyro and i could fly it with my 2801 Pro TX. So i removed the IR receiver and put a Walkera 5G6 RX2402 into the heli. Motors hooked up in parallel. Now i have a nice little submicro Chinook heli that has a gyro.
Only two channels for now, forward speed is set by COG adjustment. Replaced the stock battery, both 240 and 400mAh Zippys work well. Here is a little video.
Hardy from rclineforum.de has some improvements for the sloppy Walkera 4G6 tail: Brass inlays for the bladeholders that will eliminate most of the play on the tailrotor hub are only the beginning. Then there is the custom aluminum/brass pitchslider (bearings inside) – looks like a major improvement over the stock part. Now thats some german engineering at its best! Hopefully these parts will be available soon, for now we can only catch a glimpse of the prototypes. A link to Hardy’s site can be found below the images.
tail blade holder with and without brass inlays
aluminum pitchslider with inserted bearings
aluminum pitchslider looks solid
You can find Hardys Website here (in german) http://www.byws.de/start.htm. Direct link to his mod (google translated) here.
As posted before, the Walkera RX2609 can be modded to a 2.2gm gyro-less RX for micro planes etc. Now here is the mod to use all 6 channels. The 6th channel is gyro-sense which normally goes directly into the gyro. Ive routed the gyro-sense to the SX servo socket. The SX socket was originally used to output the tail servo signal generated by the gyro. Now it put out the gyro-sense / AUX2 signal directly. Only to pad on the PCB have to be connected for this.
Walkera RX 2609 6 Channel mod
Here is my Walkera 4G6 landing gear. Hybrid design made from parts of the original 4G6 gear and an old HM52#1 gear (see my older post here), held together by shrink tube and ca. The 4G6 gear is super lightweight and unbrakable and the HM52#1 mounting provides a wider spread so the heli has more stability on the ground and during landings. Total weight incl. screws is 2.2gm only, so its weight is even less then the original Walkera 4G6 LG (2.4gm).
Hybrid 4G6 / HM52 landing gear on the 4G6 - sideview
Hybrid 4G6 / HM52 landing gear on the 4G6 - mounting
Hybrid 4G6 / HM52 landing gear on the 4G6
only 2.22gm 4G6 / HM52 landing gear
Now its official. The Walkera 4G6 2609 RX can be separated. One of the boards is the gyro, the other one is RX only (that is the board with all the servo connectors). After seperating the RX board is only 2.25gm (see pic below). As is the thing has 5 channels but it might be possible to use the gyro sens. channel as well, making it fully 6 ch.
The RX will be used in my BLiX-Twin.
Here is a short video with the seperated RX alive:
gyroless RX2609 2.25gm
As the 30mm wide Zippy lipos (450, 600mAh) wont fits into the stock Walkera 4G6 landing gear i have removed the battery holder from and cut the LG in the middle of the front mounting. Drilled a second whole and used a longer screw to mount it.
Now the distance between the struts big enough for 30mm Zippys. Lipo is held by a rubber band. Maybe not the most elegant solution, but less weight than any other landing gear. Stabilty of the LG is still strong.
Walkera 4G6 landing gear modified for Zippy lipos
There have been questions about how to set up the Gaui mixerarms on the Walkera 4G6 heli correctly.
When using the metal bladegrips you will need spacers in order to have the ball links exactly in the center over the flybar.
I took some M1 hexnuts, drilled them to 1.5mm inner diameter and used them as spacers. they are about 0.7mm thick, this is perfect for my setup. What kind of spacer thickness to use depends on how tight your bladegrips are on the feathering shaft, the space between rotorhead and bladegrips. 0.7mm spacers should be perfect for the stock setup. If you use the plastic bladegrips the bosses have to be trimmed down a bit.
The video shows how to check if you have the correct spacers. Notice that the ball links line up almost perfectly in the video. If they are not in line you will get friction and vibrations in the rotorhead.
Image below shows all the detail to look for.
Gaui Mixerarms on the Walkera 4G6 - correct setup
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