The Road to the Perfect MOI [ the life and times of my composite bat ] By Trong Nguyen TEAMS Academy...
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Transcript of The Road to the Perfect MOI [ the life and times of my composite bat ] By Trong Nguyen TEAMS Academy...
The Road to the Perfect MOI[the life and times of my composite bat]
By Trong Nguyen TEAMS Academy Baseball Bat Engineering
Table of Contents
Design Requirements Design Alternatives Final Design Prototype Problems/Errors In the End Final Project
Design Requirements
MOI: 5100 Mass: Light Center of Mass: close to the barrel Length:28.5- 31.5 inches Braiding: 4-8 braid layers and 30°-65° angles End-cap:2-5 ounces Knob:0.5-2 ounces
Design Alternatives
1. Using Model to adjust the amount of end-cap and knob.
2. Max out stats then use model to cut off parts of bat to get desired MOI.
Use the Model!
0
2000
4000
6000
8000
10000
Method 1 Method 2 (not a very
smart choice,my friends)
MOI
Final Design
Length: 30.5 inches Weight: 24 ounces Braid Layers: 8 Layers Barrel Braid Angle: 60° Handle Braid Angle: 32° End-cap: 2 ounces Knob: 2 ounces
Prototype
Length: 30.75 inches Weight: 23.80 ounces Braid Layers: 8 Average Handle Angle: 31.875° Average Barrel Angle: 58.75° End-cap:1.96 ounces Knob: 1.94 ounces
Problems/Errors
Prediction of shell weight slightly off (no biggie). Added extra 2 oz accidentally (big biggie). Had
to “Harpoon” the 2 oz. out (thanks Scott).
In the End
MOI was GREAT! Weight was NOT
GREAT!
Target Actual Percent Error
MOI 5100 5017 1.627%
Weight 24 oz 23.80 0.833%
Research Project
Goal: Investigate the MOI measurement error through experimentation
How we did it: Find MOI of three different bats (Thinh, Annelise, Linda) and look at percent error
Thinh
Thinh’s Bat Average Percent Error
Length 0.11%
Weight 0.008%
Center of Mass 0.36%
Period of Oscillation 0.42%
MOI@6 1.36%
Linda
Linda’s Bat Average Percent Error
Length 0.19%
Weight 0.001%
Center of Mass 0.24%
Period of Oscillation 0.67%
MOI@6 1.35%
Annelise
Annelise’s Bat Average Percent Error
Length 0.20%
Weight 0.01%
Center of Mass 1.01%
Percent of Oscillation 0.58%
MOI@6 0.33%
Conclusion
The Period of Oscillation consistently has the highest rate of error of all measurements in finding MOI.
It is because of human error.
Thank you!
To Dr. Jumper, Mr. Doherty, Mr. Drain, Konstantine, and everyone who helped me make my bat.