In lugnet.announce.moc, Rene Hoffmeister wrote:
in case youre interested in seeing how to stack a ton of LEGO bricks to
build a 21-feet-long cruise liner, please see this video:
All I can say is, wow!
When you say a ton of LEGO bricks, do you mean that literally? (The word
ton is frequently used as a figure of speech in English to simply mean that
something weighs a lot. I dont think thats what you mean, but Im not sure.)
in case youre interested in seeing how to stack a ton of LEGO bricks to build a
21-feet-long cruise liner, please see this video:
May be the Keel King with you!
|> I've looked at that, but honestly got interested in the Pasco product first just|
> due to who's catalog arrived at my house first. They look almost identical in
> functionality except the LabQuest has a stylus and more memory, while the
> XplorerGLX has I2C sensors (or seomthing like them; it seems they transmit
> digital information back the main unit, while the Vernier sensors are analog and
> AtoD is done on the main unit). Is that correct? Do you use a LabQuest and do
> you have any more information, reviews, comments etc about it? It's not like
> this is a product reviewed by Consumers Reports or something, so I'm finding it
> hard to get 1st-hand knowledge.
Nop, I have seen it. I will try to get more information about it.
|In lugnet.robotics, Claude Baumann wrote:|
> > ...I'd love to, but don't have the signal generator right
> > now. I'm very tempted to get something like this:
> > http://www.pasco.com/featured-products/xplorer-glx/index.cfm
> B.t.w. Vernier also has a remarkable device:
I've looked at that, but honestly got interested in the Pasco product first just
due to who's catalog arrived at my house first. They look almost identical in
functionality except the LabQuest has a stylus and more memory, while the
XplorerGLX has I2C sensors (or seomthing like them; it seems they transmit
digital information back the main unit, while the Vernier sensors are analog and
AtoD is done on the main unit). Is that correct? Do you use a LabQuest and do
you have any more information, reviews, comments etc about it? It's not like
this is a product reviewed by Consumers Reports or something, so I'm finding it
hard to get 1st-hand knowledge.
|> Someone else interested in repeating the experiment? Philo?|
I would be interested, but I have no audio equipment (apart from a function
Very interesting data BTW!
|> That sounds like resonance. Perhaps in the sensor response, but at 3 kHz the|
> wavelength is down around 10 cm, meaning a half-wavelength at 5 cm is getting
> very close to the physical dimensions of the sensor. Did you check for physical
> resonance effects, perhaps within the casework?
Excellent suggestion!!! We'll open one sensor and try once again.
> ...I'd love to, but don't have the signal generator right now. I'm very tempted
> to get something like this:
B.t.w. Vernier also has a remarkable device:
Someone else interested in repeating the experiment? Philo?
P.S. I added a graph to the page, where the sound pressure is maintained
|In lugnet.robotics, Claude Baumann wrote:|
> ...you tried to maintain the sound pressure constant.
Since I was doing this all manually, it was by far the easiest. I realized that
a better way would be to vary the signal generator level at each frequency, but
often when trying that I simple "maxed out" the reported level from the sound
sensor at some frequency, and wanted to do that as little as possible.
> we were amazed to see that around 3kHz, the sound sometimes
> has to be louder, sometimes weaker, in order to maintain the
> constant 20 NXT-dBA. We sweeped over the range and the value
> droped and grew at neighbour frequencies.
That sounds like resonance. Perhaps in the sensor response, but at 3 kHz the
wavelength is down around 10 cm, meaning a half-wavelength at 5 cm is getting
very close to the physical dimensions of the sensor. Did you check for physical
resonance effects, perhaps within the casework?
> This leaves us puzzled. It would be a great thing, if someone
> verified this.
I'd love to, but don't have the signal generator right now. I'm very tempted to
get something like this:
As it would satisfy nearly all of my datalogging needs when they go beyond the
NXT (higher resolution).
> snip.. The summarized results (over a lower range of
> frequencies) are here:
> My conclusion was the sensor can be used to distinguish fairly pure tones below
> roughly 1 kHz (below 1 kHz, there's a nice distinguishable difference between dB
> and dBA modes), but not above that..snip
Your excellent graph shows that you tried to maintain the sound pressure
constant. We did the inverse in the last graphs, where we tried to draw the
curve for a constant NXT sensor value.
We also repeated the experiment, and this time, besides the measurements, we
payed attention to the sensation of loudness... and we were amazed to see that
around 3kHz, the sound sometimes has to be louder, sometimes weaker, in order to
maintain the constant 20 NXT-dBA. We sweeped over the range and the value droped
and grew at neighbour frequencies.
This leaves us puzzled. It would be a great thing, if someone verified this.
|I am pleased to announce my newest MOC
The RTS Zavala Steamship-of-War
This vessel is a side-paddle-wheel sailing steamship.
The model is almost 4 1/2 feet long (1.36 meters) and it uses 13 hull center
Although called a schooner, the Zavala is more properly a hermaphrodite
brigantine. Some drawings of the Zavala show 3 masts, but the best research
(the INA article), however, confirms that she had only two masts. My model of
the Zavala has working Lego pneumatic side-paddle-wheel walking-beam steam
engines; it also has a working ships wheel with steering gear reduction to the
rudder. Things I like about this model: the curved inverted sloped stern, the
full length gun deck mounting 24 cannons, the ships bell, the boats, the way
the schooners gaff sail booms attach to the masts, the steer down the length of
the hull, the curve around the bow and along the sides, and the paddle wheel
shells. As you can see, the RTS Zavala has her guns run out and is firing up her
boilers (two pneumatic air-tanks) - no doubt she has spotted her prey.
The TWO paged brickshelf gallery is here:
Some links about the real Texas Navys Zavala:
Wikipedia entry for the Texan Schooner Zavala
INA Article about the Zavala starts on page 10
Texas Navy ship list
NUMA article about the Zavala
|In lugnet.robotics, Rob Hendrix wrote:|
> "Brian Davis" <firstname.lastname@example.org> wrote in message
> > In lugnet.robotics, Rob Hendrix wrote:
> > > I'll patiently wait for the modified class... *evil grin*
> > Fair enough... you mean one where you can use modified bricks for
> > water-tight
> > enclosures? I really would love to move into the even riskier option of
> > true
> > submarines...
> > Or do you mean the modified *combat* class, that allows (nay, encourages!)
> > tipping, trapping, fouling, and swamping the opponents? <grin>...
> > --
> > Brian Davis
> I was thinking... "More Power!! ungh ungh ugnh"
Speaking of which... I didn't have time to build it, but I was thinking about
to my boat; modifying the tires to be some type of paddle-wheel type of
construction. :) Alas, I had other building I needed to get done for our
event, that I didn't have enough time to see if I could get it to float or not.
|"Brian Davis" <email@example.com> wrote in message|
> In lugnet.robotics, Rob Hendrix wrote:
> > I'll patiently wait for the modified class... *evil grin*
> Fair enough... you mean one where you can use modified bricks for
> enclosures? I really would love to move into the even riskier option of
> Or do you mean the modified *combat* class, that allows (nay, encourages!)
> tipping, trapping, fouling, and swamping the opponents? <grin>...
> Brian Davis
I was thinking... "More Power!! ungh ungh ugnh"
|In lugnet.robotics, Rob Hendrix wrote:|
> I'll patiently wait for the modified class... *evil grin*
Fair enough... you mean one where you can use modified bricks for water-tight
enclosures? I really would love to move into the even riskier option of true
Or do you mean the modified *combat* class, that allows (nay, encourages!)
tipping, trapping, fouling, and swamping the opponents? <grin>...
|> I look forward to that or any pictures of the various boats. This seems to|
> an... undertapped area.
> Brian Davis
I'll patiently wait for the modified class... *evil grin*
|In lugnet.robotics, Michael Huffman wrote:|
> Very nice; I like your design!
Thanks - like you said, simple sometimes tends to be a good approach, and while
I only had the red hulls there wasn't a lot of mass budget to "overbuild".
> we figured we still needed someone in the pool, just in
> case something went wrong...
That I *completely* understand. I just haven't had the luxury of a warm pool to
play in, so it's test in the bathtub, and then really hope it works "in the
wild". It's... nerve-wracking.
> > One potentially helpful almost-within-your-rules suggestion? Fill
> > the boat hulls with styrofoam.
> I think it'd be allowed... within reason.
I actually used a hot-wire cutter to shape pieces of foam insulation to
custom-fit the hulls. Easier solutions would probably have worked... but with a
$250 NXT in the mix, I decided to give myself the best insurance I could.
> We talked about sailboats afterwards, but we didn't think it would
> work without portable fans.
Very good point. I was thinking about it because my solution is currently
limited to the batteries contained in the stock LEGO boat motors, which isn't
much (I want to move up to longer trips). I really need to move up to a
different propulsion system, as much as I like the "stealth" approach that
Serenity has currently.
> I didn't take the video; I've asked if we could get a small
> segment of the race up on YouTube if it looks good. I'll let
> you know.
I look forward to that or any pictures of the various boats. This seems to be
an... undertapped area.
|In lugnet.announce, Michael Huffman wrote:|
> The challenge was then thrown out for GFLUG members to construct
> a floating vehicle from LEGO that will be able to maneuver across
> a pool using LEGO-only power.
Cool. Although since the festival takes place at Downtown Disney, I think you
really should have had a race across the entire lake. Serenity could handle it:
And I've got the 2.0 version (using two blue hulls... and mounting a camera that
can view above or below water) all built (around here, unfortunately, the water
is starting to freeze).
> * Always remember try out your boat in water before the event.
Further note: the center of mass is an important concept, as is the center of
boyancy... and they're not the same thing :).
> * Water-proof your electronics! Can't stress this enough.
Or, since I'm not sure there's a true all-LEGO way of doing this... make *darn*
sure it won't sink. One potentially helpful almost-within-your-rules suggestion?
Fill the boat hulls with styrofoam. It really doesn't change the "LEGO" aspect
of it, but it does assure that if the hull starts taking on water, it can't take
on very much, so the system still floats even if swamped.
> * The Advance Heap: The second race will be for those boats that can do a
> "pool lap" (ie. go from pool side A to pool side B, then back to pool side
> A). Similar to the America's cup, your boat will sail around buoys or
> maneuver around obstacles in the pool.
Two suggestions here: try it autonomously (a lot of fun... and *boy* do you have
to trust your programming), and try sailboats.
Do you have any video?
|During Festival of the Masters, GFLUG held its first annual LEGO Powered Boat
Race. What is that, you may ask?
To give you a little background, the theme that GFLUG members were to build MOCs
according to was Transportation: Past, Present & Beyond! The challenge was
then thrown out for GFLUG members to construct a floating vehicle from LEGO that
will be able to maneuver across a pool using LEGO-only power.
We had two types of races, winners of each (will) received engraved bricks &
LEGO as prizes. The first race -- a simple race -- was to cross the pool
length-wise, first one to touch the far side wins. The second race was to
maneuver around obstacles, but due to poor planning & bad lighting conditions,
the boats simply had to traverse three sides of the pool in a horse-shoe shape,
first one to reach the far side won. And since the first two races were so much
fun, we ended up holding a third simple race.
Heres a picture of the winning boat (made by Robin Werner) of the first two
(photo by Todd
Dont have a photo of the winner of the third race, sorry. However, Ill do a
follow-up post of pictures of GFLUG boats MOCs from the event when I receive
them. And weve taken some video of the races -- but keep in mind, it was dark
-- however, if we dig up some good footage, Ill do a follow post.
So, in the mean time, I wanted to throw out the rules that we came up with.
This was our proof-of-concept race & had lots of fun! Our group is already
talking about having a 2nd race at our next major event -- MegaCon in February.
Everyone is welcome to adopt the rules & enhance them as the see fit, but please
post pictures from the race & thoughts about your experiences.
- Always remember try out your boat in water before the event.
- Dont over engineer the problem, sometime simpler is faster.
- We came up with a few other (alternative) heaps listed below.
- Water-proof your electronics! Cant stress this enough.
The object of the races is for competitors to construct a floating vehicle from
LEGO that will be able to maneuver across a pool using LEGO-only power.
TYPES OF HEAPS:
- The Simple Heap: The first race will be for you to maneuver your boat from one side of the pool to the far side of the pool (length-wise); the first boat to reach the far side wins. Great for everyone that just has a floating haul & a boat motor.
- The Advance Heap: The second race will be for those boats that can do a pool lap (ie. go from pool side A to pool side B, then back to pool side A). Similar to the Americas cup, your boat will sail around buoys or maneuver around obstacles in the pool.
- The Tug-of-War Heap: Two boats tethered together by a string, start out heading in opposite directions. Boat A must pull boat B past a stationary marker (pool lap lines make a good point of reference).
- Boat Sumo Heap: Two boat start in the middle of the pool. Boat A must push boat B into a pool wall.
- The boat must be made from LEGO elements and must only use LEGO for power. No glue, melting or modification of LEGO is allowed.
- Tape is allowed to help keep your watercraft air-tight as possible. As well as plastic/zip-lock bags/foam to help keep your electronics dry. Non-LEGO items should not provide additional power. And non-LEGO items should not contribute more than 5% buoyancy to the overall water craft (the rule here is to help keep it dry, not make it perform better).
- PaB LEGO cups are allowed (for floatation) as a construction element in your boat.
- For advance boat heaps, battle boat rules apply -- you may use any LEGO construction to try and throw other boats off course or sink them. Be creative!
- Organizers of the boat race are not responsible for any water damage or loss. Contestants enter the competition entirely at their own risk. If you are using a NXT/RCX in your boat construction, remember to keep the brick air-tight in case it sinks!
- These rules are subject to improvement, further clarification, & change. If you have suggestions or improvements on how to make these races better, please provide feedback!
|Im not one for announcing my MOCs, but Ive been working on this one for awhile
now & thought it deserved to be talked about. Introducing the Disney Magic
Cruise boat in micro-scale:
(photo by Joe
(photo by Todd
The micro pirate ship by Joe Meno. He added to help bring Castaway Cay to life!
Its nearly ~80 some studs long and ~16 studs wide, ~20 some bricks high in
places. Been working on it since January 08, its gone through a few changes
since posting my first
picture on Flickr. Its inaugural display happened over the weekend at
Festival of the Masters at Downtown Disney in Orlando, Florida.
Here are my
pictures from the event. More
pictures from the event should start appearing (over the next few days) as
GFLUG members upload and tag them.
|The Tenacious Class Guided Missile Boat complements the earlier Courageous Class
in that it provides long-range fire in comparison to its short-range torpedo
Here we see the Gladius missile system which mounts five ship-killing missiles.
The Gladius missile system incorporates a rotating firing platform. Although the
system can allow for off-bore firing, full 360 degree firing is also possible,
and firing directly at a target can allow for a longer range as opposed to
off-bore firing which can reduce the missile range as it turns to acquire its
View of the helmsman and Captains positions. The Captain sits in a raised
position with a repeater display to his right that can show any of the ships
Some images of Tenacious Class vessels and their Courageous Class counterparts:
|In lugnet.announce.moc, Dave Sterling wrote:
Stacy and I are huge fans of the Discovery series Deadliest Catch. Our
favorite boat on the show is the F/V Northwestern followed closely by the
Cornelia Marie and the Time Bandit. This is my first MOC in what (I hope)
will be a series of all the boats from Deadliest Catch. I will be building
these over the next year and hope to have them all complete by Brickworld
Very nice. Its ironic that the LEGO crab piece is almost too small to be in
scale to the size of the minifig, as compared to some of the giant crabs they
catch on the show.
|In lugnet.town, Nelson Yrizarry wrote:
In lugnet.announce.moc, Dave Sterling wrote:
Northwestern was built in 1977 at Marco Shipyard in Seattle, WA. She was
originally 108 feet in length overall. The vessel was built specifically for
the King and Tanner crab fisheries of Alaskas Bering Sea. In 1981 there was
a collapse of the King crab fishery so the boat stayed busy fishing Tanner
crab. In the early-80s, Northwestern was one of the first boats to fish
Opilio crab. The Opilio crab fishery turned out to be the bread and butter
fishery for the entire crab fleet. Opilio fishing lead to
over-capitalization of the fishery overall with several new boats being
built at that time.
During the 1980s, the vessel stayed busy all year long fishing Opilio crab
6-8 months (January-August), Blue King crab in the Pribilof Islands
(August), Red King Crab (September),Brown and Red King Crab
(November-December) out West on the Aleutian chain. Even though the vessel
was very busy year-round, the crew always made it home for Christmas.
In 1987, rather than buying a new boat, the family decided to have
Northwestern lengthened to 118 feet in order to pack more crab and increase
the vessels stability and ability to carry more gear (crab pots). The vessel
went from 156 pots maximum to 200 pots maximum.
In 1991 there was a pot limit introduced to the Alaskan crab fishery. This
prompted the family to have the boat lengthened to 125 feet in order to
attain the maximum pot limit of 250 pots per vessel.
This MOC features a working pot launcher, sorting table, pots, crane and
picking hook, and (of course) crabs. In addition, there is a Sig Hansen
minifig in the wheelhouse.
More pictures are available on my
Brickshelf page and
on my MOCPages page.
Neat ship (and interesting TV series). Looks great with the blue baseplates
x-posted to lugnet.boats. Please consider your FUT, since some here are
FUT·less about that sort of thing.
They will be replying here soon, no
Big Daddy Nelson
Wow. We have a lugnet.boats? Guess I should look at the various newsgroup
names more. I dont think Ive ever seen a post to lugnet.boats before. I
learn something new everyday. Thanks!