advertisement

SNAP Propulsion

60 %
40 %
advertisement
Information about SNAP Propulsion
Entertainment

Published on November 7, 2007

Author: Mentor

Source: authorstream.com

advertisement

Slide1:  Dennis Asato June 28, 2001 XSuperNova / Acceleration Probe (SNAP) Propulsion SNAP Propulsion System:  SNAP Propulsion System FUNTIONAL REQUIREMENTS Provide capability for multiple burn, 136 m/s DV Provide capability for 3-axis momentum unload KEY DESIGN DRIVERS Initial payload mass = 1619 kg ACS momentum unload = 3.5 kg/yr for 5 yrs No S/C orientation constraints during orbit transfer thruster firings (e.g., instrument protected with covers) Contamination sensitive instrument & sensors S/C power constrained to “several hundred watts” SNAP Propulsion System Design Trade:  “Low Power” EP Assumptions SNAP Propulsion System Design Trade SNAP Propulsion System Design Trade Conclusions:  SNAP Propulsion System Design Trade Conclusions Baseline Design: “Blowdown” (unregulated pressure) N2H4 System with 4x22N canted thrusters & three 48.3 cm dia. propellant tanks Merits: Simple manifold design, low contamination, relatively low component mass & orbital ave. power Negatives: Low Isp (large tanks) Propulsion System Options to Reduce Volume MMH/NTO, pressure-regulated bipropellant system option would reduce the propellant tank diameter to 35 cm (4 tanks) + a 20 cm dia. pressurant tank. Orbit transfer with single high DV burn would allow use of solid motor + small N2H4 system (ACS unload & small DV orbit adjust) 2 kW power system would be required to use EP thrusters (N2H4 arcjet, Xe Hall) – low thrust; long orbit transfer time. SNAP Propulsion System:  SNAP Propulsion System SNAP N2H4 PROPULSION SYSTEM N2H4 Propulsion System Design N2H4 mass (10% contingency) = 130 kg “Dry” mass (4 Tank Design) = 34.1 kg Three 48.3 cm dia tanks with AFE-332 elastomer diaphragm Primary & Redundant set of 22N thrusters mounted on –X axis & canted 15o off X-axis Orbit Ave Power (@25% D.C.) = 23 W Catalyst Bed + Thruster Power (During Firing) = 10.2 W per thruster 15o X Y Z Z SNAP Propulsion System:  SNAP Propulsion System SNAP Propulsion System:  Regulated BiPropellant System Option SNAP Propulsion System

Add a comment

Related presentations

Related pages

Snap-Fan Solar National Air Propulsion

Snap-Fan Solar National Air Propulsion. All Contents © Snap-Fan, LLC Solar National Air Propulsion. Site by EvenVision ...
Read more

SMAP

SMAP, or Soil Moisture Active Passive, is an Earth satellite mission that measures and maps Earth's soil moisture and freeze/thaw state to better ...
Read more

Products | Snap-Fan Solar National Air Propulsion

Products. SKU Title ... 28 Inch AC Snap-Fan: 28 Inch AC Snap-Fan: Leave this field blank . All Contents © Snap-Fan, LLC Solar National Air Propulsion.
Read more

SNAP-1 Propulsion System

• Propellant: 32.6 g of Butane • Thrust: 45 mN @ 0 ºC, 120 mN @ 40ºC • Impulse: 22.3 N sec max • Storage pressure: Max. 4 bar abs @ 40ºC ...
Read more

NASA's Jet Propulsion Laboratory

NASA.gov brings you the latest images, videos and news from America's space agency. Get the latest updates on NASA missions, watch NASA TV live, and learn ...
Read more

Advanced Space Fission Propulsion Systems - NASA

Advanced Space Fission Propulsion Systems. www.nasa.gov. Pre-Decisional, For Discussion Purposes Only. 2. Two Types of Space Nuclear Systems Flown to Date
Read more

DESIGN OF A NUCLEAR PROPULSION SYSTEM FOR AN UNMANNED ...

DESIGN OF A NUCLEAR PROPULSION SYSTEM FOR AN UNMANNED AERIAL VEHICLE By Ronald David Turba Thesis Submitted to the Faculty of the Graduate School of ...
Read more

SNAP - Space Propulsion and Mission Analysis Office

SNAP The SNAP web site is the primary mechanism for obtaining the latest version of SNAP, registering as a SNAP user, and reporting bugs and bug ...
Read more

Space Nuclear Power and Propulsion - NASA

Space Nuclear Power and Propulsion presented by Michael G. Houts, PhD Michael.houts@nasa.gov 1
Read more