42145 - Airbus H175 Rescue Helicopter

[HydroWorld Outlook]

5 hours ago, Ngoc Nguyen said:

I'm looking forward to a pentagon (108 degrees) connector. As far as I know there aren't any compact way to build a regular pentagon with Technic parts.

Yes there is. See above.

[Ngoc Nguyen]

1 minute ago, HydroWorld Outlook said:

Yes there is. See above.

Those are illegal imma call the Lego cops 

Edited January 25, 2022 by Ngoc Nguyen

[howitzer]

Just now, HydroWorld Outlook said:

Yes there is. See above.

It's not a regular pentagon though, as it bends the axles. The connectors are 112,5° while a regular pentagon's corner is 108°.

[HydroWorld Outlook]

6 minutes ago, Ngoc Nguyen said:

The connections in the video should bend the axles between them right? That should make them illegal techniques.

They don't necessarily bend. The central section that slides vertically along the axle isn't that stable and difficult to drive with an axle, but no parts are being stressed here.

4 minutes ago, howitzer said:

It's not a regular pentagon though, as it bends the axles. The connectors are 112,5° while a regular pentagon's corner is 108°.

Oh, well, maybe you're right. I was looking at this:

Geodesic Dome - Pentagon Hub

The image for the Pentagon hub used all no.5 axle connectors. I thought that was a legal connection. 

Edited January 25, 2022 by HydroWorld Outlook

[howitzer]

2 hours ago, HydroWorld Outlook said:

They don't necessarily bend. The central section that slides vertically along the axle isn't that stable and difficult to drive with an axle, but no parts are being stressed here.

Oh, well, maybe you're right. I was looking at this:

Geodesic Dome - Pentagon Hub

The image for the Pentagon hub used all no.5 axle connectors. I thought that was a legal connection. 

Yeah, I think the difference is small enough, that the parts are not stressed enough for permanent deformations (probably) but I'm sure it's still illegal by TLG's standards.

[MinusAndy]

11 hours ago, howitzer said:

Umm, aren't clutches made for that? Either the new linear one or the traditional white 24T gear, depending on how strongly it has to resist before slipping.

I think those white clutch gears are a terrible solution for that. Particularly in the moc I’m building as the landing gear is pretty big so the clutch tends to slip when I don’t want it to.

[howitzer]

16 minutes ago, MinusAndy said:

I think those white clutch gears are a terrible solution for that. Particularly in the moc I’m building as the landing gear is pretty big so the clutch tends to slip when I don’t want it to.

What about the linear clutch? It has higher resistance before slipping (and of course you could couple the 24T clutches)

[MinusAndy]

I just don’t like the fact that I’m basically loading up the gearbox against the clutch. It will also affect the other functions running from the same power source as the motor slows against the clutch. I have a system now where the worm that drives the undercarriage is spring loaded and crawls along the drive shaft when the undercarriage reaches its limit. This crawling motion in turn pulls the gearbox into neutral. The challenge has been making it compact and reliable. It’s 80% there now.

[R0Sch]

199,99 Euro

[Brickthus]

On 1/25/2022 at 4:36 PM, howitzer said:

Yeah, I think the difference is small enough, that the parts are not stressed enough for permanent deformations (probably) but I'm sure it's still illegal by TLG's standards.

It would be lovely to have a 108-degree axle joint but they would be confused with the 112.5 degree (#5) joints.

I did make a pentagon with some 1x2 plates with clips and with bar; it fitted round some 24mm steering wheels.  Add some 2x2 tiles with vertical peg to attach Technic but it would nee more work to manage centripetal forces and retain the rotor blades.

Mark

[phmzt]

I saw this a few days ago:

https://rebrickable.com/mocs/MOC-81034/Love 张堰清/the-method-of-dividing-the-circle-equally-with-gear-5/#details

Looks nice but it's not compact is it? 

[howitzer]

21 hours ago, phmzt said:

I saw this a few days ago:

https://rebrickable.com/mocs/MOC-81034/Love 张堰清/the-method-of-dividing-the-circle-equally-with-gear-5/#details

Looks nice but it's not compact is it? 

Looks nice, but it doesn't allow for pitch control, and I don't think the gear teeth holding the blades in place are very strong, I don't think TLG would resort to anything like this.

[Ngoc Nguyen]

In a right triangle with legs of 1 and 2 units respectively, the smaller acute angle is 26.565°. In that video the angle at a corner of the pentagon will be 26.565 x 4  = 106.26. With the use of frictionless pins to allow some slack, I think the design in the video is legal.

Edited February 2, 2022 by Ngoc Nguyen

[HydroWorld Outlook]

Well, no matter how they accomplish the rotor, I am very excited to see that TLG is releasing another large Technic aircraft. This is a fantastic way to also celebrate the official 10-year anniversary of the original 9396 Helicopter set from 2012. 

Although, I don't know how it's going to be powered. There is a very strong possibility that the LEGO Powered UP Simply Battery Hub might be discontinued, and/or replaced in the coming months. It is currently out of stock and listed as 45% percent off, which is usually a dead giveaway for a retiring set.

Edited February 9, 2022 by HydroWorld Outlook

[Ngoc Nguyen]

I did some trials yesterday and found out a compact pentagon connection design that doesn't require any special connectors. It's not entirely legal but it is solid enough.  

 

 

The mathematical foundation for this design is a right triangle with an angle of 54 degrees at the base. I tried different numbers for the sides, and found out that when one leg is 1.5, the other leg is 2.065, which is close enough to an integer. Based on that, I built this pentagon with a side of 4 studs and a perpendicular distance to the center of 3.065 stud, and then use frictionless pins and axles to bridge the .065 decimals. I test built this design in real life and it worked.

I'm gonna use this in a small scale Airbus H175 model I'm working on. It's also an alternative model of 42113. I intended to wait until there is a shrink a model contest is announced to talk about this, but apparently there isn't going to be anything like that in the near future.

 

 

[Ngoc Nguyen]

Description:

Quote

The model is said to consist of 2001 parts, and the MSRP in this country will probably be 199.99 euros. Visually, the helicopter is predominantly red and yellow, which will most likely be the new yellow hue that is currently already used in the LEGO City sets. The model will feature motorized functions and we strongly assume that the Control+ battery box introduced in the Osprey is now installed here for the first time! The main and tail rotor can be rotated in two different speeds, the main rotor consists of 5 rotor blades. These can even be adjusted in pitch, in reality this causes the helicopter to climb or descend.

On both sides of the cockpit there are control sticks, with which you can actually adjust the tilt of the main rotor, to simulate a flight to the front, back, right or left. A few new parts are said to have been designed for this purpose. The set also includes a working winch, with a hook that can be let down via a device on the outer wall. both cockpit doors and the large sliding door on the side can be opened by hand.

 

[Gumalca]

If this really is the new yellow, then this will be an easy pass for me

[Maaboo the Witch]

14 minutes ago, Gumalca said:

If this really is the new yellow, then this will be an easy pass for me

It's only used on emergency vehicles in the City theme, so I doubt it's replacing regular yellow.

[allanp]

I am excited for this. "Climb and descend" implies collective control and "front, back, right or left" implies cyclic control. And "A few new parts are said to have been designed for this purpose" also suggests that both controls may be present and done so in a way that's more elegant than what we're currently able to MOC. 

[steph77]

I already see this setup somewhere....

[R0Sch]

The big issue with the new vibrant yellow isn't just the color itself, it's that it's semi-translucent and looks cheap. Also rescue helicopters do not have the fluorescent decorations that emergency vehicles need for night time response. Regular yellow and red would be more appropriate.

[allanp]

So I watched the latest promobricks livestream (with captions auto translated into English so might not be perfect) but they were saying that it does indeed have both cyclic and collective controls, and that the mechanics to achieve this are very realistic with new pieces and possibly a new swash plate. They didn't say if the tail rotor has any pitch control but that the blades are slightly tilted to make a little wind. They also say that it does have two speeds for the rotors. It has a slow speed so you can see the functions working, you can see the blades tilting as they rotate easier, and a fast speed so that it can generate some wind. That might be an unrealistic addition but I really like that idea. It's an additional feature that allows you to better see the realistic functions working, it's not replacing something realistic with something that's unrealistic. So I am really excited by this set.

[howitzer]

13 minutes ago, allanp said:

So I watched the latest promobricks livestream (with captions auto translated into English so might not be perfect) but they were saying that it does indeed have both cyclic and collective controls, and that the mechanics to achieve this are very realistic with new pieces and possibly a new swash plate. They didn't say if the tail rotor has any pitch control but that the blades are slightly tilted to make a little wind. They also say that it does have two speeds for the rotors. It has a slow speed so you can see the functions working, you can see the blades tilting as they rotate easier, and a fast speed so that it can generate some wind. That might be an unrealistic addition but I really like that idea. It's an additional feature that allows you to better see the realistic functions working, it's not replacing something realistic with something that's unrealistic. So I am really excited by this set.

This sounds really great. Sure buy for me if this holds.

[HydroWorld Outlook]

Awesome features, but did Promobricks ever say anything about the Helicopter is going to be powered since they're clearly discontinuing the Simple Battery Box?

[2GodBDGlory]

4 hours ago, HydroWorld Outlook said:

Awesome features, but did Promobricks ever say anything about the Helicopter is going to be powered since they're clearly discontinuing the Simple Battery Box?

I can't answer that question, but I rather suspect it will just the simple box, since the two-speed gearbox they seem to be describing would be useless if coupled with either a manual crank or the proportional control of the smart hub. Who really knows at this point, though?