Ngoc Nguyen

@Bartybum - The point of using clutch gears is to prevent damage when the conveyor belt is stuck. Using the normal 24z gears can twist the axles or break the 24z gears. Mine were broken when the XL motor tried to wind them. - Setting up as you said: would not change the speed of the belt at all. Recall that the original setup in the instruction is: 20z 12z 24z 8z 24z 8z Both setups reduce the speed by (12/20) x (8/24) = (3/5) x (1/3) = 1/5 = 0.2, regardless of order of gear pairings. The setup I suggested is: 24z 8z24z 8z 12z 20z This setup first increase the speed, then decrease it, so that the final speed is faster. The calculation is (20/12) x (8/24) = (5/3) x (1/3) = 5/9 = 0.55.

For those complaining about the price of 42066 Air Race Jet, it's currently sold at 80 EUR on amazon.de w free shipping

To increase torque

Last year the back side of 42055 box at Toy Fair has the image of the B model, albeit a preliminary one.

@Jim Can you check out if my MOD here works for your model? Many thanks!

Or you can just call it 20z clutch gear. Which certainly help when the model is dense and tight. The problem with 24z gears is that they need more than 3L around them to spin.

Step 506 507 508 in the instructions. Instead of 20z 12z 24z 8z 24z 8z in the original setup, rearrange them as 24z 8z 24z 8z 12z 20z 20z: the tan gear, 20 teeth 12z: the black gear, 12 teeth 24z: the white gear, 24 teeth 8z: the grey gear: 8 teeth I have this set up in my own model, so I can guarantee that it works smoothly. This increases the speed significantly, while still allow enough force to not slip the clutch gear 24z. You can even change the 12z - 20z into 24z - 8z and the clutch gears still don't slip, but that would be too fast to be enjoyable.

I think the inspiration for the 42069 is the hybrid H1 Hummer. Same body look, same track geometry, same yellow color at the tracks. http://ecomento.com/2015/05/05/plug-in-hybrid-hummers-antarctica/

Do you manage to keep the motor and battery box

The pin not visible is probably the one in the lowest hole in the front line, on the farther side. It's hidden behind the Linear Actuator. In another words, the front line of one side has 8 pins, while the front side of another side only appears to have 7 pins, but actually has 8 pins. It's just a pin is not visible.

ULTIMATE MOD for 42055 B model (or so I believe). The mods include: 1/ Improve the short conveyor belt 2/ Increase chute shaking rate without removing clutch gears without using too many extra parts. ------------------------- 1/ - Problems: 1.1/ The short conveyor belt is too low, so the mining truck doesn't fit under it. 1.2/ The side panels are too short, so the bricks sometimes fall out before reaching the end of the belt. 1.3/ The slope leading from the filter is too long, so the bricks sometimes stay on it without falling to the belt. - Fixes: ----- 1.1/ Attach the 5M liftarms at the second stud instead of the first one. ----- 1.2/ Replace each 3x11 panel covering the tracks with 2 15M liftarms, 1 11M liftarm, and 2 of this http://brickset.com/parts/4210851 The original setup is 3L liftarm - 3L connector - 3x11 panel - 3L connector - 3L liftarm Replace that with this setup 15L liftarm 15L liftarm 2L connector - 11L liftarm - 2L connector Doing that will give you two spare 3x11 DBG panels. Now use them to replace the two 3x11 dark blue pamels in this step Now you have two spare 3x11 blue panels. Now attach them to step 372 and you've got the short belt fully covered. ----- 1.3/ The original slope is 11L long: Use a 5x7 frame, fill it inside with 3 5L liftarms, and attach to one end 2 5L liftarms, and you will have a slope that is 9L long. However you can only attach the frame at the 2nd hole, so the effective length is 8L, the shortest possible length for the slope. If it's shorter then the bricks will fall back into the gap below the slope. ------------------------------ 2/ The general idea is to increase the gear ratio from the motor to the long belt only, and reduce the gear ratio to the short belt and the intake belt. If you only do the former part without doing the latter part, it will increase the speed of the whole drivetrain system, which eats more power from the motor, which makes it barely faster than the original setup. But first of all you need to increase the number of pallets on the track links. In the original setup there are 11 5L arms. I would suggest you double them into 22 liftarms, but 22 3L liftarms. If you use 22 5L liftarms the weight of the track will increase significantly, and thus reduce the speed. ----- To increase the gear ratio from the motor to the long belt, In step 169, DO NOT attach the black brace. The gear ratio of the brace is 1:1. Instead, attach a 20z gear + bush + 7L axle. In the yellow 5L liftarm, push the 12z gear to the outermost, and attach it later. This will give it a gear ratio of 5:3. ----- To decrease the gear ratio to the intake upper belt: Replace the 5L liftarm with a 9L liftarm in step 136 Replace the.13L liftarm with the 5L liftarm in step 142. The general idea is that, instead of attaching the 3 16z gears that lead from the motor to the long belt on the right side, you move them to the opposite side. Put the 16z gear on the other side Put the red clutch gear on the other side Insert a 12z gear in the place of the 16z gear, and insert the 16z gear on the other side. Replace the 16z gear with 20z gear. ----- To decrease the gear ratio to the short belt: Replace the 16z gear with a 12z gear in step 292 Replace the gears in step 422 with, from up to down, 20z - 12z - 20z Replace the gears in step 390 with 12z - 20z 16z - 16z I've made all these mods in my own model, and the result is quite satisfying. Although I still have to shake the bricks out sometimes, the chute shakes very rapidly, about two shakes a second.

I'll just quote myself:

The 42070 does push the state of art IMO. The hybrid gearbox represents the next step in the evolution of Technic models, because it has several advantages over the traditional 4-function gearbox, the multi-directional gear box, the RC motor setup, and even the 8043 gearbox.

The XL motor seems only connected through the front holes and not through the side holes. That I think doesn't resemble the real model. By TLG standards L and XL motors need to be secured properly because they vibrate a lot during operation.

You can also wonder why there have been few panels in LBG and DBG.

As I've expressed earlier, 42070 is not a full RC model. It's the usual 4-function set with external direction switches instead of built-in multi-directional switches, and with bonus RC movement.

Is it just me or the 42070 is quite noisy? And the video doesn't provide any new information to me.

Cannot be unseen!

Bargey McBargeface? Or Pushy McPushface?

Here's a video about 42066 B model Private Jet. The rear part looks crude.

A more simple way to do this change is to put the 12z - 20z in step 14, then 8z - 24z later:

One thing that bothers me is that when the hatch fully opens, I have to turn the switch back to neutral position, or else the fans will stop spinning. So in step 14, I replace the clutch gear with the normal 24z gear: while in step 20 I use two clutch gears instead. I tested this out and found out that the clutch gear on the wheel retraction side was too weak that it slips before moving the wheel. The clutch gear on the VTOL side does slip too just not as often. So totally NOT recommend this MOD.

Say what you will, but I think the hybrid gearbox in 42070 is ingenious, because it solves multiple problems at the same time: - For RC models, the number of functions often depends on the number of motors, as evidenced by the most recent ones 8275, 9398, 42030, 42065. The 8043 is an exception because it has 6 functions with only 4 motors, but the general rule still holds. And since PF components are more costly than other components, having too many of them will drive the cost up. Now this 42070 is also a RC but has 6 functions with only 2 motors. That to me is a revolution. - The multi-directional gearbox might be more intuitive to use, but it also takes up more space. With the traditional multi-functional gearbox, 1 switch corresponds to 2 functions. With the multi-directional gearbox, 1 switch corresponds to 1 functions. Now this 42070 has 4 non-movement functions (outriggers, swiveling, raising arms, winch), and how many switch does it have for them? 1 switch (excluding the other mode-controlling switch). By leaving the task of changing directions to the remote control, the gearbox takes up much much less space. That to me is a revolution. I expect to see more of this implementation in the future. - This model to me is not a RC set with 4 additional functions, it's a usual 4-function set with additional RC driving and steering. And that makes all the difference. Because whenever I show my models and their functions to my friends, the first thing they'd often ask is "is it RC driveable". When I say "No, but it has these cool functions" their enthusiasm falters a bit. But for this one I'll be able to say "Yes yes it totally does too". On another note, am I the only one who has been waiting for a flagship that is not designed by either Markus or Uwe?

It's interesting that since the debut of the new gear shifting elements they have not been used with driving ring extensions in official sets.

Yes the model use 4 of the small turntables, 2 for each axle.