Rob's Hangar

here is a new ZULU Trainer Canopy. Carbon-Style, white bottom. 2.9 g.

new ZULU trainer 4G6 / 4#6 / 120D01 canopy prototype

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

Mario took some slow motion shots of me doing the first outdoor flights with the Walkera 4G6 this year.

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.

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.

Heli-Max has posted a nice promo-vid for their rebranded Walkera 4G6. Some great flying, inverted funnels and the like. I also like that they have the plastic rotor head in their setup. Nice canopy design, too.

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

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