Jump to content

DrJB

Eurobricks Dukes
 View Profile  See their activity

  • Posts

    3,006

  • Joined

  • Last visited

 Content Type 

Everything posted by DrJB

  1. DrJB
    Very nicely done again ... though I'm curious about the vehicle. You said you used both studded and studless, and my question is: It seems the studded is primarily for the 'skin' of the vehicle while the body/structure (from some limited shots) appears to be primarily studless. Is this correct or there is more to it? As for 'recycling' the various shades of gray ... I believe those are in high demand with people building castles and medieval scenes ... or possibly star-wars in this case.
  2. DrJB
    It's been a while since I built mine ... could it be used only on the B-model?
  3. DrJB
    Go back through all steps in the book .. and I'm sure you'll find where it's supposed to go. Usually I only check the 'white rectangles' with all parts needed for every step.
  4. DrJB
    Very nicely done ... and I do like the 3rd party tires. Though, in all honesty, the studded parts give it an old/70's look yet the functionality is commendable. Kinda like modern military vehicles, rather 'rough' on the outside, but very sophisticated on the inside. And I'm sure all on here are very divided when it comes to studded vs. studless.
  5. DrJB
    While there are some valid points above (feedback from others), I must commend the OP for such design. Then again, my primary goal/expectation with Lego, is to reproduce functionality/kinematics ... not necessarily strength. I think the OP has 'proved' that a fully functional swash plate (with both cyclic and collective) is certainly doable with the current assortment of Lego parts ... Good Job!
  6. DrJB
    Are you suggesting that, as lego parts age they become harder and thus, have a stronger 'clamping' power?
  7. DrJB
    Regarding new pins seeming less 'tight' than old pins ... I fully agree as I noticed that as well. However, it is possible that dimensions have changed, but equally likely the material being used has changed as well. This is rather obvious on the new 12/24T and all DB gears. The earlier versions were made of harder plastic ... the later version can easily be cut with an X-Acto knife. One added bonus of such 'softer' plastic is that parts seem more durable ... as I have not cracked a new half-bushing yet.
  8. DrJB
    Now you got me thinking/worrying ... my son built a mindstorms-based contraption that, once you step in his room, rings an alarm ... Hope he does not see this thread.
  9. DrJB
    IMHO, the must-have new/studless 'retired' sets are below. 1. 8258 Crane Truck 2. 8043 Excavator 3. 8110 Unimog 4. 8455 Pneumatic BackHoe 5. 8070 Red Car
  10. DrJB
    Reminds me of two 'similar' machines ... that use spinning wheels to throw disks. 1. Disk thrower from Mindstorms Ultimate Builders' Set 2. CD shooter by Philo, based on same principle, but uses much larger discs (old CDs) Still, neat design, but I agree with all above i.e., ... rather dangerous.
  11. DrJB
    As some May have suggested above, perhaps a combination of weight/parts/cost in some fashion might be a better metric. Granted, some parts cost much more than others: for example, the large container from the Pick-a-Brick wall costs $16.00 and yet you can fill it with over 30 mini figs. Now, the mini figs however sell for $10 for a pack of 3. Possibly the paint job / detailing is a very expensive process. We can go very detailed as in, develop a cost equation based on special parts ( eg PF electrical), mini figs, and remaining plastic ... Some sort of least-squares fit can be attempted, and one would be able to develop a cost estimate ... Very doable in Excel ...
  12. DrJB
    Could it be a simple weight/mass units ... Ounces v. Grams ?
  13. DrJB
    I started a related thread few weeks back and my observation was that, over the past several years, there have been a great emphasis on 'large part count' advertised on boxes (e.g., largest set ever) ... when in fact, at the same time, Lego was using smaller and smaller parts ... (some of them too small for my fingers). In the Technic theme, I found that, consistently, about 50% of parts were 'nails and glue' i.e. the 2L/3L pins that hold beams together. Thus, if a set is advertised with 2000 parts, only half of those are bound to be useful as for me, the nails&glue do not count.
  14. DrJB
    Years back I purchased the F1 Silver Champion. The UPS SOB left a package totally crushed on my porch and when I told him I would not accept it, he simply ran away ... Furious, I called Lego to explain, they told me to keep that unit, and they over-nighted me a second unit, and got it the next day ... best customer service experience ever.
  15. DrJB
    True, but I was referring to a 'real' curve as opposed to a theoretical one. For the real motor, the faster it spins, things like friction come into play ... and tend to increase with RPM That gray tube appears to be made of round bricks, 4x4 corner ... 48092 ... would need some smart building/stacking to give shaft torsional stiffness (not sure it needs much bending though). The read 'bearings' are made seem to be of 76768 at the top, and 30099 at the bottom.
  16. DrJB
    I did build the version by Akiyuki and it is rather 'finicky' ... later, I 'translated' Akiyuki's page and himself mentioned it was very 'sensitive' as well. My recollection though is that his version used 2 pneumatic switches, how did you manage the same 4-cycle with simply 1 switch? Do you have a pneumatic diagram that explains that?
  17. DrJB
    Reminds me of a speech by the company's president few years back. We had an big employee meeting, and it so happened it was his birthday as well ... So, when came time for the Q&A, one young gal asked him: Mr XYZ, what does it feel to be 50? ... He paused for a moment, then replied: I visited my son in College last week, and he was telling me all about the university life .... so I tell you this: When you're 50, you still want to do the same crazy things you did when you were 20 ... except that your body does not want to come along for the ride ...
  18. DrJB
    deleted
  19. DrJB
    Amazing MOC. I can't help but notice that the steering links are made-up of 'surgically altered' parts, retained by friction only ... not sure that's sufficient
  20. DrJB
    I agree, would be interesting to see a torque-rpm curve though, in many designs of the sort, you'd want the shaft to be fast spinning. The reason is, for a given power, the higher the rpm, the lower the torque i.e., the less strong the shaft needs to be. I'm one with a lot of reservation about this but I reckon, the sheer size/concept of it is pure amazing ... whether it is 100% lego or not. Still, very curious about the interface from plastic lego to metal drive-shafts (driving the 2 tires) ... i.e., how does the lego motor connect (transmit power) to the actual drive-train.
  21. DrJB
    What would happen if it were full lego is ... Everyone would be begging for your amazing renders ...
  22. DrJB
    You see this a lot in engines and transmissions. PTO's are additional outputs used to power accessories. For example, on many construction and farm equipment, the engine has a toothed flywheel attached to the crankshaft. While the crankshaft goes to the transmission to power e.g. the tires, several accessories can be placed and gear with the flywheel. Such accessories are for example an alternator, a hydraulic pump, ... Etc. So, as some have said above, a PTO is an auxiliary output from typically an engine or a transmission.
  23. DrJB
    Thank You!
  24. DrJB
    I am not sure I agree here (and I do understand the laws of physics). Momentarily the pressure 'may' drop, but if the air-paths are open, the pressure quickly 'balances' to that in the tank. That is why the bigger the tank, the smoother the pneumatic engines will run. The other challenge I see with such design is really the max air pressure the system can handle. The weakest is NOT the seal in the piston, but most likely the connection rubber tube to piston. I can easily make that connection 'pop' with a simple lego piston/pump. Unless, as someone mentioned above, the tubes were somehow 'glued' to the lego parts. Again, my opinion? ... This is a fake ... possibly just something to attract 'investors'.
  25. DrJB
    neep to up those numbers by at least 1 ... built mine the very fist time the LXF file was posted. How do you get such info from Rebrickable? ... this page (hottest MOCS)? http://rebrickable.com/mocs
×
×
  • Create New...