| Discussion Forum: Thread 321387 |
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| | | Author: | BranBrick  | | Posted: | May 20, 2022 07:36 | | Subject: | Tight/illegal technique in set 80020? | | Viewed: | 170 times | | Topic: | General | |
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| Hello all,
My first time posting here.
I got a White Dragon Horse Jet (80020) set recently and something odd caught
my attention when building Mo's small craft.
In it, a technique is used to make a small frame for the craft, with stud options
to basically all sides. The core of this is specifically a 4733 piece attached
to the side of a 4070 (headlight) piece. As I progressed through the steps I
felt the final craft had a lot of tension on the frame and when disconnecting
a single piece other studs disconnected.
Never have I seen or done this before. I tried it out with other pieces I had
to the same result. Not that I have much of both those pieces lying around.
I left the craft unassembled as I was worried the pieces were getting to much
stress.
I tried looking up the technique but couldn't really find it. Recreating
it in Stud.io gives no warning at all, and the mere fact that this appears in
a 2021 lego set gives me the impression its totally legal. I am wondering what
more experienced builders think, thanks in advance.
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| | | | | Author: | SylvainLS | | Posted: | May 20, 2022 09:18 | | Subject: | Re: Tight/illegal technique in set 80020? | | Viewed: | 88 times | | Topic: | General | |
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| In General, BranBrick writes:
Hi,
| | My first time posting here.
|
Welcome 
| | I got a White Dragon Horse Jet (80020) set recently and something odd caught
my attention when building Mo's small craft.
In it, a technique is used to make a small frame for the craft, with stud options
to basically all sides. The core of this is specifically a 4733 piece attached
to the side of a 4070 (headlight) piece. As I progressed through the steps I
felt the final craft had a lot of tension on the frame and when disconnecting
a single piece other studs disconnected.
Never have I seen or done this before. I tried it out with other pieces I had
to the same result. Not that I have much of both those pieces lying around.
I left the craft unassembled as I was worried the pieces were getting to much
stress.
I tried looking up the technique but couldn't really find it. Recreating
it in Stud.io gives no warning at all, and the mere fact that this appears in
a 2021 lego set gives me the impression its totally legal. I am wondering what
more experienced builders think, thanks in advance.
|
I guess you’re talking about the step in the pic below.
Nothing illegal here. It’s perfectly in-system.
I don’t remember an exact other offical set doing the same but I’m sure there
is some, for instance in Architecture.
–––
A side note: even though Studio can give clues if something will work or not…
it’s also not perfect. Or, actually, it’s too perfect: the parts are exactly
in-system and don’t include any of the tolerances the real bricks have.
For instance:
— in Studio, a 1x1 brick is exactly 1 stud¹ wide and there’s no gab between two
put side by side,
— in real life, a 1x1 brick is slightly less than 1 stud¹ wide because otherwise
you wouldn’t be able to build (too tight) and even if you could hammer them in
place, you wouldn’t be able to remove them (they would have fused together).
Studio (= LDraw) parts are also simplified (sometimes in order to be in-system).
4070 is the best example of that: IRL, the side stud goes farther than the lip,
in Studio, they are flush. (And the Studio part has a square bottom hole; IRL
it’s rounded.)
So, TL;DR: Studio is a clue, not the law 
(¹ “1 stud” = “1 module”: if you make a very long assembly of long parts and
measure the distance between the centers of the two end studs and divide by the
number the studs minus one (posts and intervals…), you get that distance, 8mm.
A real brick has about 0.1mm on each side.)
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| | | | | | | Author: | BranBrick | | Posted: | May 20, 2022 10:16 | | Subject: | Re: Tight/illegal technique in set 80020? | | Viewed: | 48 times | | Topic: | General | |
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| In General, SylvainLS writes:
| | I guess you’re talking about the step in the pic below.
Nothing illegal here. It’s perfectly in-system.
I don’t remember an exact other offical set doing the same but I’m sure there
is some, for instance in Architecture.
|
Hi, yes I am referring to that connection in the instruction picture you sent,
and the steps that come after it. Plates are put on the sides and top, which
did not want to stay in place unless they were all on it.
I suppose then that this tension is intended. Will be interesting to use in future
built.
Also thanks for clearing up on Stud.io. I didn't take it as ultimate authority,
but I wasn't aware of its peculiarities.
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| | | | | | | | | Author: | SylvainLS | | Posted: | May 20, 2022 10:31 | | Subject: | Re: Tight/illegal technique in set 80020? | | Viewed: | 51 times | | Topic: | General | |
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| In General, BranBrick writes:
| | […]
Hi, yes I am referring to that connection in the instruction picture you sent,
and the steps that come after it. Plates are put on the sides and top, which
did not want to stay in place unless they were all on it.
I suppose then that this tension is intended. Will be interesting to use in future
built.
|
That’s a bit strange because 4070’s side stud’s connection is rather good, thanks
to the lip.
Or is it between 4070 and 4595 that it’s loose?
| | Also thanks for clearing up on Stud.io. I didn't take it as ultimate authority,
but I wasn't aware of its peculiarities.
|
BTW, that goes for all CADs: everything should be tested IRL.
Or you need LEGO engineers at hand to check constraints and grip, like they do
in Billund.
Trying with real bricks is cheaper though
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| | | | | | | | | | | Author: | tEoS | | Posted: | May 20, 2022 12:01 | | Subject: | Re: Tight/illegal technique in set 80020? | | Viewed: | 64 times | | Topic: | General | |
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| I wonder if they even test with real parts.
This set:
some of the parts to the circular head have tension and don't seem like they
should be used in that manner.
| | That’s a bit strange because 4070’s side stud’s connection is rather good, thanks
to the lip.
|
Or is it between 4070 and 4595 that it’s loose?
| |
| | Also thanks for clearing up on Stud.io. I didn't take it as ultimate authority,
but I wasn't aware of its peculiarities.
|
BTW, that goes for all CADs: everything should be tested IRL.
Or you need LEGO engineers at hand to check constraints and grip, like they do
in Billund.
Trying with real bricks is cheaper though
|
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| | | | | | | | | | | | | Author: | SylvainLS | | Posted: | May 20, 2022 12:17 | | Subject: | Re: Tight/illegal technique in set 80020? | | Viewed: | 86 times | | Topic: | General | |
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| In General, tEoS writes:
| | I wonder if they even test with real parts.
This set:
some of the parts to the circular head have tension and don't seem like they
should be used in that manner.
|
I hadn’t looked at how this one was built yet and I don’t see anything wrong
with it….
One thing I haven’t seen in official sets yet and that doesn’t work IRL but works
perfectly in CADs is using inverted brackets bottom to bottom (see pic below).
Some MOCs use this technique.
I’ve used it too in digital… and then was disappointed it didn’t work well with
real bricks (I used it only when there was no other link between the sides, so
that “only” makes a gap / misalignement, it doesn’t really stress the parts).
(Some have said it worked with clone brands….)
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Netherlands, Flevoland
France, Nouvelle-Aquitaine
USA, Michigan
