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Mass Estimations for Tami

This document presents detailed mass estimations for various spacecraft components, including Tami's RCS engines, the total mass calculations of parachutes, and retro engines. It provides in-depth calculations of launch loads for prominent systems such as Saturn V, Space Shuttle, and Energia, detailing liftoff forces and resulting accelerations. Additional tasks include studying parachute codes, developing trajectory coding for retro burns, and preparing a Design-Method Report in collaboration. This ensures efficient mission planning and technical execution for upcoming launches.

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Mass Estimations for Tami

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  1. Mass Estimations for Tami • RCS: 4kg each * 24 engines = 96 kg • Parachutes: • Supersonic = 136 kg • Subsonic = 595 kg • Retro Engine: 135 kg (OMS) • Propellants: 4515 kg • According to Table 4.4.2 in PERForM • Total Mass = 5477 kg

  2. Calculation of Launch Loads • Saturn V System • F(liftoff)=3,440,310 kgf • m(end of first stage)=887,501 kg • Therefore a=F/m=3.88 g’s

  3. Calculation of Launch Loads • Space Shuttle • F(liftoff)=2,625,932 kgf • m(end of SRB burn)=836,389 kg • Therefore a=F/m=3.14 g’s

  4. Calculation of Launch Loads • Energia • F(liftoff)=3,582,250 kgf • m(end of strap-on boosters)=856,897 kg • Therefore a=F/m=4.18 g’s

  5. Retro System – Shuttle OMS • Non-cryogenic • High thrust and Isp for non-cryogenic engine • Reliable and Reusable • 100 missions • 1,000 starts

  6. Mass Pen. for Retro Burn

  7. Mass Pen. For Angle Change

  8. Cost Increase for Angle Burn

  9. Things to Do • Study PERForM’s Parachute Code • Begin to write our own parachute code • Finish by next Wednesday • Have parachute loads for Mike • Need to work with Tami on coding retro burns into the trajectory code • Finish by next mid-week • RCS Engines • Start writing Design-Method Report

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