Level 3 Certification Project – 2007/08

Denny Smith

Project name:  Apparent Motion

Advisiors:  Kent Newman

                                Jim Wilkerson (L3CC)

Concept:

This Level 3 certification project consists of a 6-inch diameter G10 fiberglass airframe, capable 
of accommodating up to 98mm M-impulse motors.  It is a 3-fin booster design, with lower 
and upper payload sections for drogue and main chute recovery gear.  Topped with a 5:1 
conical nose cone, giving the rocket an overall length of 103 inches.  Dry weight, including 
recovery gear and electronics, rounds out at ~446 ounces (27.8 lbs.).

Certification motor:     Aerotech M1315W

Projected Max Alt:      7300 ft. AGL (simulated)

Drogue deployment:   Apogee

Main deployment:       1300 ft. AGL

        Fig. 1 – Dry weight

        Fig.2 – Loaded weight (M1315)

Preliminary flight simulation data:

Center of pressure:     85.6 inches from nose (Rocksim V8.01)

Center of gravity:        76.6 inches from nose (Rocksim V8.01) [Loaded with motor]

Mass at liftoff:             40.3 lbs. (Rocksim V8.01)

Total impulse:             6645 N-Sec.

Burn Time:                  5.95 Sec.

Launch conditions

• Altitude: 2500.00000 Ft.
• Relative humidity: 50.000 %
• Temperature: 59.000 Deg. F
• Pressure: 29.9139 In.
• Wind speed model: Light (3-7 MPH)

Low wind speed: 3.0000 MPH

High wind speed: 7.9000 MPH

• Wind turbulence: Fairly constant speed (0.01)

Launch guide data:

• Launch guide length: 96.0000 In.
• Velocity at launch guide departure: 65.8911 ft/s
• The launch guide was cleared at : 0.301 Seconds
• User specified minimum velocity for stable flight: 43.9993 ft/s
• Minimum velocity for stable flight reached at: 44.1161 In.

Max data values:

• Maximum acceleration:Vertical (y): 1518.433 Ft./s/sHorizontal (x): 3.809 Ft./s/sMagnitude: 1518.433 Ft./s/s
• Maximum velocity:Vertical (y): 875.7196 ft/s, Horizontal (x): 10.1018 ft/s, Magnitude: 876.5459 ft/s
• Maximum range from launch site: 457.37211 Ft.
• Maximum altitude: 7852.20431 Ft.

Landing data

• Successful landing
• Time to landing: 128.729 Sec.
• Range at landing: 437.65285
• Velocity at landing: Vertical: -18.7266 ft/s , Horizontal: 6.5344 ft/s , Magnitude: 24.1469 ft/s

Component descriptions:

Nose cone:

            Type:                           Performance Rocketry fiberglass

            Shape:                         5:1 Conical

            Length:                        31.000 inches

            Shoulder:                     6.000 inches

Upper airframe (main payload) tube:

Type:                           Peformance Rocketry G10 fiberglass

Outside diameter:       6.145 inches

Inside diameter:          6.000 inches

OAL Length:                24 inches

Main recovery:

            Chute type:                  Sperachute with spill hole

            Chute size:                  96.000 inches

            Harness:                     1.000 inch tubular nylon x 25 ft. long

Avionics Bay:

            Type:                           Performance Rocketry G10 fiberglass

            Outside diameter:       6.000 inches

            Inside diameter:          5.900 inches

            Length:                        12.000 inches

            Bulkheads:                  0.125 inches G10 thick x 6.000 inches DIA

                                                 backed with 0.250 inch birch recessed inside coupler.

Flight computers:

            Primary:                      Perfect Flight HA45K

            Backup:                       Perfect Flight MAWD

Switches:

            Flight computers:        Missileworks rotary type

            Deployment charges: Missileworks rotary type

Midship airframe (drogue payload) tube:

Type:                           Peformance Rocketry G10 fiberglass

Outside diameter:       6.145 inches

Inside diameter:          6.000 inches

OAL Length:                20 inches

Drogue recovery:

            Chute type:                  Sperachute with spill hole

            Chute size:                  24.000 inches

            Harness:                     1.000 inch tubular nylon x 25 ft. long

Aft coupler:

            Type:                           Performance Rocketry G10 fiberglass

            Outside diameter:       6.000 inches

            Inside diameter:          5.900 inches

            Length:                        12.000 inches

            Bulkheads:                  0.125 inches G10 thick x 6.000 inches DIA

                                                 backed with 0.250 inch birch recessed inside coupler.

Fincan airframe tube:

Type:                           Peformance Rocketry G10 fiberglass

Outside diameter:       6.145 inches

Inside diameter:          6.000 inches

OAL Length:                28 inches

            Type:                           Performance Rocketry G10 fiberglass

            Size:                            98mm

            OAL Length:                20 inches

            Centering rings:          3x  0.125 G10 fiberglass

Fins (3 each):

            Core:                           0.125 inch G10 fiberglass

            Second layer:              0.093 inch balsa with birch center spur

            Third layer:                  5.7 oz 3K carbon fiber (vacuumed)

            Fourth layer:                6.0 oz. S-glass (vacuumed)

            Final layer:                   2.0 oz. E-glass (vacuumed)

            Dimensions:                See below

Tracking:

            Type:                           Walston Retrieval

            Secondary:                  Beeline GPS

Sub-assembly designs

Avionics bay:

 Fin attachment:

Overall Dimensional drawing:  

Avionics wiring diagram:

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