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 | | Re: Walking Excavator KAISER S2
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| (...) (URL) ) I see you've used two cylinders together in several functions. How have you kept them straight whist avoiding strain on the nozzles? There's a new piece in the 8421 crane that does the job now. Mark (20 years ago, 12-Sep-05, to lugnet.technic)
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8421
(score: 0.339)
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| | 8421 Design flaw?
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| I know many people have expressed an opinion that set 8421 Mobile Crane has a general flaw when it comes to pneumatics (being the boom comes crashing down when the pneumatic switch is released quickly, and the set lacks enough tubing to create a (...) (20 years ago, 12-Aug-05, to lugnet.technic)
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8421
(score: 0.339)
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8421
(score: 0.338)
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8421
(score: 0.338)
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| | Liebherr LG 1750
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| Greetings all- Having just gotten another of the 8421 cranes (total is 2) I decided on a whim to build the Liebherr LG 1750 (it is possible to build the chassis using these two sets). I set to work yesterday on the chassis, in the afternoon, and (...) (20 years ago, 19-Aug-05, to lugnet.technic)
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8421
(score: 0.337)
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8421
(score: 0.337)
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| | Re: steering
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| (...) To make the steering work best, the external knob should turn the outermost sets of wheels, ie the ones nearest the front and back of the crane, with the most direct link possible, then gear it down towards the centre to steer the rest. TLC (...) (20 years ago, 23-Aug-05, to lugnet.technic)
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8421
(score: 0.337)
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| | Re: Liebherr LG 1750
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| (...) Earlier today I started on the driver's cab (again using the cab of the set 8421 as a base, I was able to modify it, ie give it doors that open and close). It didn't take too much time, but what was a real problem was the pins. After pushing (...) (20 years ago, 20-Aug-05, to lugnet.technic)
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8421
(score: 0.337)
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| | Set 8421 (technic crane) modified
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| Hi, Skip the rambling and go strait to the pictures: (URL). After building this new set (in about 5 hours), I noticed two things that could be improved: - The boom move up very quickly and came crashing down! My first fix was to install a restricted (...) (20 years ago, 7-Aug-05, to lugnet.technic, FTX) !
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8421
(score: 0.337)
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| | Re: 8421 first impressions
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| Just completed 8421 myself. Impressions: -certainly the longest technic build I've ever had. -an excellent parts pack -looks very impressive when complete -functionality: vaguely disappointing. When all is said and done, what can this, the biggest (...) (20 years ago, 1-Jul-05, to lugnet.technic, FTX)
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8421
(score: 0.337)
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| | Re: 8421 first impressions
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| (...) Could they be for the alternate model? I only have one set and its staying built for a while so I haven't looked at the alternate. JB (20 years ago, 17-Jul-05, to lugnet.technic)
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8421
(score: 0.335)
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| | Re: 8421 first impressions
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| (...) Took me six hours to build this beast (I always had a rate of ~300 parts per hour when it comes to Technic models). I’m 100% sure I’d followed the building instructions correctly, and in fact have a perfect and fully functional crane truck. (...) (20 years ago, 17-Jul-05, to lugnet.technic)
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8421
(score: 0.335)
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| | Re: clutches
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| (...) Lego have never made a clutch (correct me if im wrong and i don't consider this to be a "clutch"(URL) ) so i'll assume you are reffering to the gearbox. The beauty of the older style gearboxes (and what made them work) was the fact that the (...) (20 years ago, 1-Aug-05, to lugnet.technic, FTX) !
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8421
(score: 0.335)
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8421
(score: 0.335)
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| | Re: 8421 first impressions
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| (...) Thanks for the info. Still, I don't see the need to use this motor in the 8421. It only uses one motor, and it is not a very demanding application. They could have used the minimotor easily. It would have been smaller and less expensive, and (...) (20 years ago, 1-Jul-05, to lugnet.technic)
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8421
(score: 0.335)
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| | Re: 8421 first impressions
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| (...) Hmm - not a lot more torque, but a huge amoutn of additional consumption, and fairly highly reduced efficiency. The 5292 appears to definately be the American SUV of the Lego motor range. I take it that for heavier torque - it is still better (...) (20 years ago, 1-Jul-05, to lugnet.technic)
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8421
(score: 0.335)
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8421
(score: 0.335)
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| | Re: 8421 first impressions
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| (...) Thanks, I did do that and it works so so, but not great (I stil have to very carefully partially open the switch so it leaks slowly) but certainly better than before. What's wierd is that there is actually an extra tee in the set, although not (...) (20 years ago, 2-Jul-05, to lugnet.technic)
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8421
(score: 0.334)
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| | Re: 8421 first impressions
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| (...) well... you could just only switch the pneumatic switch to the centre stop. I have done this and the air gently flows out and the boom slowly lowers (not too slowly mind you, but it doesn't slam down). I think this is designed to only use two (...) (20 years ago, 2-Jul-05, to lugnet.technic)
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8421
(score: 0.334)
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| | Re: 8421 first impressions
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| (...) Hi Vineet. In what way did you atached the extra tubes (there were a few cm of back and blue tubing left over after I cut the size I needed - I assume you are referring to those). Thanks, Gyl (20 years ago, 1-Jul-05, to lugnet.technic)
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8421
(score: 0.334)
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