AAE450 Spring 2009

Time to Complete 50m/s ΔV &

100g Payload System Overview

Brittany Waletzko100g Payload Integration Manager

Translunar/OTV Phase

Week 9

Brittany Waletzko - ATT

AAE450 Spring 2009

50m/s ΔV Maneuver (Requirement) t = ΔV m

T T = instantaneous thrust

(assumed constant over interval) m = instantaneous mass

(assumed constant over interval) Calculated using four thrusters,

pointed parallel to axis of symmetry (as per current configuration of 12 thrusters on each lander)

Brittany Waletzko - ATT

 100g 10kg Arbitrary

Total Wet Mass (kg)

411 500 8276

Thrust per thruster(N)

13 13 355.84

Time for deltaV (s)

395 481 291

Time for deltaV (min) 6.6 8.0 4.8

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ΔV =ʃT/m dt = 50 m/s

AAE450 Spring 2009

100g Payload System

Brittany Waletzko - ATT<2>

  Mass (kg)

Net Power (W) Cost ($)

TLI Prop 144.65 -2214 $1,095,100TLI Comm 0 -31  

TLI ATT 10.76 -35.6 (see LD cost)

TLI STRC/THM 51.62 -10 $100TLI Pow 48.23 -120 $3,647,260TLI 255.26 -2410.6 $4,742,460LD Prop 108.08    LD Comm 2.21 -32.9 $295,500LD ATT 10.75 -12.7 $400,000LD STRC/THM 25.2 -10 $50,029LD Pow 5.05 641.45 $314,500LD 151.29 585.85 $1,060,029

  Mass (kg)

Net Power (W) Cost ($)

Loco Prop 0.172 -0.534  Loco Comm 0.94 -6 $21,700Loco PL 0.1    Loco Vibe 0.1 -15  Loco STRC/THM 0.91 0  

Loco Pow 0.21 3  Loco (1) 2.432 -18.534 $21,700Total in LEO 411.4 -1861.8 $5,845,889

(Continued)

AAE450 Spring 2009

Questions?

Brittany Waletzko - ATT<3>

AAE450 Spring 2009

The Scenario

Brittany Waletzko - ATT<4>

OTV: consists of TLI main engine, power system, reaction wheels, four attitude thrusters, and lander (containing two loco spheres)

Running during TLI: main engine, some attitude control, power system, heater, communications

Lander: prop system, comm, attitude sensors and 12 thrusters, thermal system, power system, two loco spheres

Locomotion: drive system, comm, payload, battery

AAE450 Spring 2009

Current 100g Integration Sheet

Brittany Waletzko - ATT

(see attached two pages)

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