 to do helicopter experiments. All right so we got three different sizes right? Helicopters? And I'm going to have these on a link in the description where you could download the templates so you can make your own. Okay so what we're going to do is predict when we drop them from the stairs we'll make them in just a second. Which one do you think will take longer to come all the way down at the top of the stairs? Maybe the small one? Okay we're gonna do a small one so let's go ahead and we'll make them and then we'll go test them. So if we look at this first we're gonna take A and C we cut here. Oops let me do it again. They got A and C we cut right on the dark dark lines and we're gonna fold the dotted lines in. So you go ahead and fold that right along the dotted line. Hey it's rocket science right? Or helicopter science? It's not easy otherwise everyone would be a helicopter pilot. Okay so perfect nice and straight there and then you're gonna take the other one and fold it that way. Yep one folds. Yep exactly perfect. So now when you hold it up and you go to drop you drop it you hold it like this and drop it we'll see how far it goes. So we're gonna do the other two the same way. Nice fold there. These are all pre-cut so you're gonna have to cut these on the lines and fold on the dotted lines. I'll have the directions in the description if you want to make your own. I'm sure we're gonna make a couple of our own after this. This is just the templates we're using. And then one more looks like a nice helicopter and that's the prediction that's gonna take the longest. Why do you predict the smallest is gonna be the longest? Because it's smaller and less heavier. Okay perfect good guess good guess. I already kind of know so I'm not gonna guess. Fold there around the dotted line and flip it over. Before you did it what one did you guess? I'll tell you after we do it all right. Perfect that's good that's good so let's go ahead we're gonna take these and we'll go in the other room. Alright so we got three helicopters on top and Grace predicted the smallest helicopter to take the longest to come down. We're starting with the largest one first. Here we go. It took about six seconds I think. Wait you threw that. There we go. We have an audience here. Alright last one. Whoa. Crashing bird. Let's do that one again. I think the small one worked. Okay medium one worked the best. Yeah I think so too. Alright so we'll try we'll try to make one ourself in the design first. Alright so here's Grace's design right here so we got the large one was right here so what'd you do Grace you? So what I did is I doubled these two so make a bigger wing. Yeah two there and then two there and we're gonna cut it right less than the full length and then here I did the same I kind of cut it and it's like same design except these are bigger and that's shorter. Okay let's go cut it. You want to cut it out? Yeah. So you're gonna cut straight down here and then cut it right there. Yep. It's already flying. Cutting corners is really hard. I'll show you a trick. Cut straight here all the way go straight all the way across. See how you can go straight up right? Then you don't have to do corners. Do this part. Okay perfect. Now fold it up right? Wait I have to cut that. Oh you're gonna cut those all the way. And I have to cut that? Just to that dot right? Not all the way just to the yeah right there and you gotta cut the middle you're right. I kind of forgot since that we were all pre-cut last time right otherwise it's just one big wing if we don't cut it. Stop right before it right about there. That's good. That's good. That's good. That's good. Yeah let's get a little space. All right here goes the test. Okay now let's go upstairs. All right. Test number two with Gracie's design. Here we go. Oh it's good good. Woo! All right. It was going really good at first. Good design. Nice. So that was Gracie's design right here with the bigger wings kind of made it longer down about halfway until it decided to crash and blow up. All right. Test results is Gracie's design one with a 4.4 seconds in the air with the smallest one going 2.2 seconds. Let us know what you did and what your results are in the comments below.