 | | Re: Serenity, an autonomous NXT-based boat
|
|
(...) Brian, ... absolutely cool ! I would like to attract your attention to a rather old Italian site (1999). (URL) Riccardo built a marveleous non-LEGO robot-boat equipped with electronic compass and GPS and travelling over the "Idroscalo Lake" (...) (17 years ago, 13-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) Thank you very much! (...) Actually, there still seem to be relatively few robotic water-craft around, to my surprise. That is an excellent project, and I'd not seen it. I'm also really glad I did not have to go the same route as he did (...) (17 years ago, 13-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) Brian, Have you considered using some of those ZNAP flex axles and a LEGO propellor? Ralph (17 years ago, 13-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) Actually, I haven't thought of that - at least partially because I've never had those axles. But I would think that a vertical axle driving meshed crown gears to drive the horizontal propellor axle, or even an inclined axle that is turned (...) (17 years ago, 13-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) What about paddle wheels? Tim (17 years ago, 13-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) You know, what I like most with your project is that is such a refreshing, new challenge, which - as you pointed out- surprisingly few people though of yet. So, this might become a completely exciting NXT robot section. I think it was in 2005 (...) (17 years ago, 13-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) If you're talking about the Outdoor Challenger (8675) ( (URL) ) then, yes, he has one of those... Steve (17 years ago, 13-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) I'd love to see more people try this. It's a little bit risky (usually, when my programming skills fail the robot doesn't end up stranding in the middle of a lake... or worse, on the bottom), but it brings up a whole new range of problems and (...) (17 years ago, 13-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) Those are a good all-LEGO solution... but they tend to splash. A lot. This isn't fatal, but means either "splash shielding" the electronics (which requires more weight), or making the entire robot bigger (so the splashing wheels aren't close (...) (17 years ago, 13-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) Airboat! (17 years ago, 13-Sep-07, to lugnet.robotics)
|
| |
| | RE: Serenity, an autonomous NXT-based boat
|
|
(...) I consider the ZNAP flex axles "not good enough" to be put to good use. Another useful item from the ZNAP collection, however, are the wheels. They have a turbine-like shape and from what I remember from past testing in the kitchen sink, they (...) (17 years ago, 13-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) Good idea, and I should have added that to the list. But a high-thrust LEGO air propeller or fan seems to be even tougher to make than a water propeller. There's been a lot of discussion in the past about LEGO hovercraft, but it's rather hard (...) (17 years ago, 14-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) Airboat? Though I don't know if you could drive a large enough prop fast enough to move you... -Rob A> (17 years ago, 14-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
OK - Since you beat me to that one how about magnetohydrodynamic propulsion (thought that might be hard with stock Lego :) Or more realistically, how about counter-rotating screw drives, like this one: (URL) be able to make something like it by (...) (17 years ago, 14-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
Zitat von Brian Davis <brdavis@iusb.edu>: (...) Sails. The motors used to trim them according to the direction and strength of the wind. ---...--- This message was sent using IMP, the Internet Messaging Program. (17 years ago, 14-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) Oars! (17 years ago, 15-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
(...) Oars are nothing but highly asymmetric paddle wheels. Yes, I know, that's a bit simplified, but still splashes a lot unless you have the high amount of control over force curves, blade angle, etc. that an experienced rower has. Just check out (...) (17 years ago, 15-Sep-07, to lugnet.robotics)
|
| |
| | Re: Serenity, an autonomous NXT-based boat
|
|
The City Harbor boat hull is plenty big to hold an RCX or an NXT. It could hold three of them end to end, actually. There are studs on the bottom of the hold and along the top, so you could build a cage for an NXT or just stick the RCX directly onto (...) (17 years ago, 19-Sep-07, to lugnet.robotics, FTX)
|
