[MOC] Tiny tiltrotor

[Rascko]

A few months ago I've got an idea, that I've never seen Lego Technic tiltrotors, which have motorized folding propeller functions (Despite, there were some excellent Ospreys and similar - my favorite are http://www.eurobricks.com/forum/index.php?/forums/topic/62305-moc-mv-22b-osprey-tiltrotor/ and https://thelegocarblog.com/tag/osprey/). So, this is what I've got in the end (sorry for mess on the background, I really don't have other place for photographing something that is ~1m long):

Motorized functions:

1. Rotors folding
2. Rotors rotating
3. Nacelles turning
4. Wing folding
5. Rear ramp opening (forgot to take video of this)
6. Landing gear could open and close (the same - forgot to take video + it was not easy to show, as it barely stands w/o support)

For keeping blades in position they were folded/unfolded during rotation, I've synchronized axle, which drive folding, to rotation of propeller, using two small turntables per nacelle (really big thanks to user Limga, who provided me this idea).

In general, this was more like "proof of concept", that something finished and in future I hope to return to this idea, because lots of issues remain unresolved and could be done better, if designed better and earlier:

• This monster is heavy. Like 10+ kgs and all the weight is carried by only 3 axes (one in each landing gear leg). It could stand w/o support, but I've used some tires from 42030, just to make sure that axis won't break.
• Wing folding works poorly. Even big turntable can't properly handle smooth movement. Need to think on more reliable solution.
• Nacelles' rotation really go non-synchronized under load. I use two motors (one for each) on one output, but it makes them go out of sync just after 2-3 cycles of "up and down". Need to consider separate control, as mechanical linking in such scale will be definitely failed. 
• Controls like elevator/ailerons etc barely works. Need to consider using strings or something like this.
• Folding mechanism could go disassemble itself, if excessive load will be applied on folding/unfolding. This doesn't seem like a big problem.

And some more photos + video (sorry for that "heavy breathing" in the beginning :) )

And the video of wing-and-propeller related functions:

 

Edited September 27, 2016 by Rascko

[Milan]

Massive! And lots of cool functions! Great

My advice, reduce the volume of all sounds in your editing program, to be same or a bit lower than the music volume. It might be better.

[Victor Imaginator]

Is this what you call "tiny"?)))

[2LegoOrNot2Lego...]

That is indeed a new definition of "tiny"... 

This is a cool build, massive, huge and so impressive... Personally I find the tiltrotors to square-ish, but other then that love it very much...!

[syclone]

Wow, really "tiny"

Now the helicopter rotor seem small

[JJ2]

Wow such a small and compact build! Its amazing how many functions you fit in there.

All joking aside great model I think its HOF material.

[Leonardo da Bricki]

That is REALLY TINY! Nice job on getting the main functions down, it all seems pretty smooth, especially for a model that size.

[1980-Something-Space-Guy]

Given it's tiny size, I'm surprised it doesn't fly.

Seriously though, that is one huge model. Thanks for sharing!

[Imanol BB]

It looks really good, i am wondering if that is what you call "tiny" model how would be a huge one? i thought that i would find something about 20 to 30 studs wide, but i found this huge monster, and i must say that i really like it, the details and the functions are so realistic, the proportions are nicely recreated, i really think that you made an excellent work here, and good luck with future modifications and creations.