Behemoth, A Rock-crawler Vehicle

November 2012 – August 2014

Automotive Club RUN TO YOU, Seoul National University

Project Leader

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Motivation

In my early undergraduate years, I have put a substantial amount of effort into understanding how great mechanical feats such as automobiles have been achieved.

Naïve yet ambitious, I wondered if I would be able to create such a masterpiece with my own bare hands. In my second year at university, I gathered a team of similarly inexperienced yet passionate students and challenged ourselves with the task of building a full-scale rock-crawler.

Rock-crawler design is an extremely challenging task since it requires a robust frame body, a deliberate CoG arrangement, and a sophisticated linkage system.

등각투상도_장호
The first sketch I made.

Process

The project seemed rather audacious at first, considering that we started with very basic steps such as learning how to weld pipes. I was extremely proud when my team and I were able to overcome numerous difficulties and complete the vehicle.

RUNTOYOU_Process_1
*sketch credited to Jaewook Cho, FEM analysis credited to Youngwoo Sim

RUNTOYOU_Process_2

The first moment after we reassembled the engine to our new chassis.

The first moment after we completed and tested our chassis and powertrain.

RUNTOYOU_Process_3

On our first test run of the vehicle, I was aboard the vehicle when it suddenly collapsed. A buckling occurred in one of the links of the suspension system, which had not been considered in the initial design process. This was a turning point in my life, as I barely avoided serious injury.

This unforgettable hazardous moment taught me a life lesson that I must become a responsible engineer who can trust my own life on the system I built.

 

Achievement

main

  • Design and fabrication(cutting, welding, assembly) of a four-linkage suspension system and the frame body.
  • Through 15 months of struggling for the success, I obtained comprehensive project management skills such as team recruiting, design concept materialization, design, modelling, fabrication, and outsourcing.

Result & Impact

  • Achieved a climbing slope of larger than 45 degrees.
  • Project awarded Bronze Prize, 2015 KSAE Baja Design Section.
  • Invitation from Hyundai and BMW as a student representative of my university.
IMG_7921.jpg
Meeting with previous Hyundai R&D director Hae-jin Kim ( I am in the green shirt.)

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