MP LEGO Technic creations Posted Wednesday at 02:29 PM Posted Wednesday at 02:29 PM (edited) Hi everyone! I am back with yet another WIP topic. In search for a rather special classic vehicle about a month ago, I have found this one. What can be more splendid than a one-off coachbuilt Rolls-Royce in a spirit of art deco is? Equipped with its eye-catching circular doors, it is sometimes referred to as the Rolls-Royce Round Door Coupe. More info about this vehicle can be found on the website of Petersen Automotive Museum. As I intend it to be somewhat monumental, the largest wheels and tyres in production are the clear choice for me. I also planned to use a 3D model for reference, yet I have faced some issues when exporting the model as a new part to Stud.io. Therefore, I went with another option - let Studio generate a sculpture (or whatever it is called) form basic parts and use it instead. The whole frame is being designed in modules (differentiated by colour) and bodywork can be easily separated. The current version: approximately 102 cm long weighs about 8,5 kg about 7.000 parts (note that the car is now mostly hollow) I do not have any firm list of wanted features, howewer, I do not want the model be enormous just for the sake of being huge, so some functions can be expected. Steering - now via a medium linear actuator Suspension - the original has leaf springs, I have opted for an imitation with classic shock absorbers Openable doors, hood and trunk Openable individual sunroofs Removable bodywork in one piece - this vehicle will in fact be a 2-in-1 model, as I would like to be able to show the chassis separately - the 'rolling chassis' is everything you would have got from Rolls-Royce in this time period anyway Manual gearbox On the other hand, my main concerns are: Model being too heavy for wheel hubs to handle - this proved to be very true after about first meter of rolling the car along, 3 wheels just came off Bodywork looking too flat and blocky The whole model being large for the sake of being large Too bad that the light bulb does not come in tan And yes, I am aware that the Spirit of Ecstasy should not be an angel, yet the broom is so perfect for this purpose In order to compensate for such a heavy car, I constructed both axles to have a small positive camber angle (though it didn't help that much). And a comparison with my recent (still WIP) Bentley Turbo R LWB. I am pretty sure I would like to write a few more lines, even though I cannot remember, what it should be about Anyway, thanks for reading & suggestions and critique is welcome. Edited Wednesday at 02:31 PM by MP LEGO Technic creations Deleted redundant lines between images Quote
Zerobricks Posted Wednesday at 02:50 PM Posted Wednesday at 02:50 PM Oh wow, what a massive and unique model! Regrding wheels coming off hubs, you can use part 6270135 or 24482 inside the hub pins to reinforce them. Or you could use large turntables! Also, frontpaged! Quote
Thirdwigg Posted Wednesday at 04:36 PM Posted Wednesday at 04:36 PM The size of these MOCs is just incredible. All of my Technic pins are quivering in fear hoping they will not be used in a model so large. Quote
Jundis Posted Wednesday at 05:00 PM Posted Wednesday at 05:00 PM Normally I really don't care about cars, but this is such a giant beast! Even technic are double-stacked and reinforced where I see, just whoa. Will the steering be geared up somehow or did you already try it under weight and decided against? :D Quote
Alex Ilea Posted Wednesday at 05:27 PM Posted Wednesday at 05:27 PM Oh my, what an insane build! You did a good job replicating the body lines, I would say near perfectly. And making a realistic chassis is very doable in this scale and allows for nice details. Honestly, I would 3D a spirit of Ecstasy, just to top of this build, it deserves it. Keep us posted! Quote
MP LEGO Technic creations Posted Wednesday at 05:31 PM Author Posted Wednesday at 05:31 PM (edited) 2 hours ago, Zerobricks said: Oh wow, what a massive and unique model! Regrding wheels coming off hubs, you can use part 6270135 or 24482 inside the hub pins to reinforce them. Or you could use large turntables! Thanks! Initially, I've thought about unicorn horns but the parts you have suggested seem to have a thinner top with smoother surface, therefore suit the purpose better. The question is, will these fit under hubcaps or are they going to stick out more than acceptable? A few screws could also be utilised, otherwise I indeed se no other purist way than using a turntable. 56 minutes ago, Thirdwigg said: All of my Technic pins are quivering in fear hoping they will not be used in a model so large. So far, I feel I have been careful enough with the amount of stress on each part (apart from the wheel hubs, apparently), though Studio shows many pins painted red when checking for stability. However, it even happens in so strange places, that I find hard to believe is accurate. 32 minutes ago, Jundis said: Normally I really don't care about cars, but this is such a giant beast! Even technic are double-stacked and reinforced where I see, just whoa. Will the steering be geared up somehow or did you already try it under weight and decided against? :D Thank you! The only less stable area of the initial digital design turned out to be the A-pillars, which, due to their angle, are not capable of supporting additional weight when put on the roof. I believe I have solved that by adding another support to form a triangle. The first version of the steering was using a planetary wheel hub and a gear rack. Due to the car's weight was the steering influenced rather by any roughness of the floor than by the steering wheel. Therefore, it was clear that I needed another solution. In this situation, a worm gear does not seem to be robust enough, so I opted for a linear actuator. You are absolutely right with the gearing. Previous 20-12 gearing was removed as the steering felt somewhat heavy. Now it takes like 10 rotations to each side to turn the vehicle, yet it is smooth and light enough even when the car is stationary. But let's be honest, a meter long car in itself cannot be considered a very playable and practical toy Edited Wednesday at 05:33 PM by MP LEGO Technic creations Quote
1gor Posted Wednesday at 06:50 PM Posted Wednesday at 06:50 PM 1925 model, so this year is his 100th birthday. Unique model, but how to replicate it with Lego (perhaps with english wheel )? Quote
Aurorasaurus Posted yesterday at 01:28 PM Posted yesterday at 01:28 PM 19 hours ago, MP LEGO Technic creations said: A few screws could also be utilised, otherwise I indeed se no other purist way than using a turntable I have an in-between solution which you may prefer: the tape trick. Place a small square of tape over the 3 pinholes on the wheel you will use, then just push the wheel on like normal. It will take more force but will stay on very well, I used this on rc models jumping and drifting and it never failed me. Cheap semi transparent whiteish tape commonly used for paper and stuff is a little bit stretchy, so I find it works best to use this kind. Plain old clear stuff works okay but not so good. Quote
1gor Posted yesterday at 03:29 PM Posted yesterday at 03:29 PM Perhaps this axle (there is also 4 studs long) with Lego nuts could help... https://www.bricklink.com/v2/catalog/catalogitem.page?P=3737b#T=C&C=11 Quote
LEGO Train 12 Volts Posted yesterday at 03:55 PM Posted yesterday at 03:55 PM Wow, I don't know what's more impressive: the chassis or the bodywork! Fantastic! Quote
astyanax Posted 9 hours ago Posted 9 hours ago Very impressive and fascinating project! I'll be eagerly following your write-ups. Quote
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