Hi everyone last time I checked up I was at home a virus has been sweeping through the world nothing really has changed I but security at the complex has gotten tighter. As you should know already me and my team Bomb.com is a drone delivery series that uses drones to deliver you ingredients so you can have the home-cooked meal without having to leave your house. Our criteria are the velocity of the drop (m/s): Lands with a speed of 1m/s to 2m/s, Accuracy of the drop: It must land 50cm within the target and Condition of the product: The product inside the package must be not harmed. My research question is how the shape and size of the spill hole will affect the velocity, accuracy and softness of the landing.

For my design iterations, the contents are the size of the parachute, shape and length of strings. Then the variable for my design is the holes in the parachute.

no hole: In the name, this parachute is the black one it has no holes in it. The challenge for this one was to find a bag that I could cut without having to smelt to bag together. This parachute dose the best for velocity, at a speed of 2.384 m/s.                                                                                                                                                                     one-hole: In the name, this parachute is the see-through one that has a big spill hole in the middle. The challenge was getting the right sized spill hole I looked around my house I couldn’t find anything so I had to hand draw it. An from the data is that this parachute was the intermediate of the bunch like the landing accuracy of 55cm can the range was 59cm to 50cm.                                                                                                                                                                                                                little slivers Now the final on is the one with the slaver. The challenge was getting to make the slavers I tock the cut-out spill hole and cut it up like a pizza then I lay then on the parachute and cut the holes out. Now for my best, it has the best of landing accuracy and bounces like it only have one bounce and the rest have more than one.

 

 

Some challenges that I faced was trying to set up the drop zone I had to think of different ways to try and get the 50cm drop radius. Now I had to get the 1-metre scale for logger pro. But some positives was that I almost had the right height from the drops and I had some help from my dad to video the drops. For the no hole parachute range is 5m/s to 2m/s, one hole range is 4m/s to 3m/s and slivers range is 5m/s to  4m/s. The mean velocity from all of the tests is 3.7715m/s and my outlier is 2.384 m/s(from the one hole testing). That is 1.3875m/s from the overall average of 3.7715m/s.

In this investigation, the aim was to assess how changing the number of holes would affect Velocity, Accuracy and Condition of the product after the drop. This project was undertaken to design a variety of parachutes and evaluate velocity, accuracy and softness of the landing. My tests confirmed that the parachute with slivers met most of my criteria. My test shows that the velocity of the slivers is the worst (ie the fastest) out of all of them, 4.298 m/s not the best because it’s the furthest away from the criteria that are 1 to 2 m/s. It also doesn’t help with Newton’s third law.

Now for that accuracy tests. Out of the three different other parachutes tested, the slivers design parachute was the closest to meeting our criteria of 50cm with 50cm on average (mean). The other part of the accuracy is how many times it bounced which can also affect the condition of the package because when it bounces it could break on the second impact with the ground. The package with slivers bounced 1 ( most of the other designs bounced at least twice). Statistically, the multiple holes parachute is then the best design for our final product.