1. Conceptual Designs Team Icarus John Brooks Ivan Olendan Kyle Reno Endalk Tegegne David Wu

2. Last Week Deliverables: ◦ Problem Statement ◦ Design Partition ◦ Project Plan ◦ Task Assignments Model demonstration Preliminary dynamic analysis

3. Whiteman’s Reverse Triangle Cradle Arm Caster Wheel Fixed Wheels Caster front wheel improves tracking and reduces instability.

4. Whiteman’s Reverse Triangle (cont’d) Positives ◦ Dynamically stable ◦ Simple Minuses ◦ Susceptible to tipping Interesting Points ◦ Modeled on modern aircraft wheel configuration

5. Auto-Steering Dolly Pilot-less steering mechanism controlled by tow rope tension.

6. Auto-Steering Dolly (cont’d) Positives: ◦ Self-steering ◦ Unlikely to tip ◦ Retrofittable to current design? Minuses: ◦ Multiple moving parts ◦ Abrupt transition to aero-tow Interests ◦ Self-steering

7. Trapezoid Design Cradle Keel Rest Caster Wheels Fixed Wheels Variation on Whiteman’s “Reverse Triangle” includes 2 front caster wheels.

8. Trapezoid Design (cont’d) Positives: ◦ Resistant to tipping ◦ Better dynamic stability due to more wheels Minuses: ◦ More weight ◦ Dynamic stability poor relative to other concepts Interests ◦ Trapezoidal shape

9. Uses angular momentum to resist dolly rotation. Gyroscopically Stabilized Dolly

10. Front View Side View Front Caster Wheels Rear Fixed Wheels Stabilizing Disk Adjustable Keel Rest

11. PMI Plus Additional wobbling resistance Additional lateral stability (tipping) from gyroscopes and wheel configuration Having two rear wheels especially important during lift when front of dolly may be picked up Minus Cost and weight higher than current dollies Dolly needs to be aligned well with the direction plane is traveling before takeoff Interesting Gyroscopic stabilizers are currently used in a variety of ships and aircraft to provide roll stability

12. Six-Wheeled Design Cradle location is positioned further rearward than conventional designs.

13. Six-Wheeled Design (cont’d) Positives ◦ Dynamically stable ◦ Rigid Frame Minuses ◦ Increased weight from additional casters ◦ High production cost? Interesting Points ◦ Rear-biased center of mass

14. Next Week Patent product search ◦ Each member responsible for at least 2 patents ◦ 5 most important results compiled ◦ Format  Basic information: title, patent #, date  Figure  Brief description