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Space Propulsion - IAP/TU Wien

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<strong>Space</strong> <strong>Propulsion</strong><br />

Comparison of Hohmann and spiral transfer<br />

( 1+<br />

ρ)<br />

3<br />

3<br />

1 a r1<br />

τ H<br />

= P tr<br />

= π = π<br />

2 μ 8μ<br />

depending only on orbital radii<br />

3<br />

τ<br />

SP<br />

→ m<br />

f<br />

⎟ f = 1<br />

T T r 1<br />

⎜<br />

⎝ ρ ⎠<br />

= dr2<br />

T r1<br />

r<br />

.r2<br />

dτ = m<br />

f<br />

μ<br />

also depending on S/C mass, thrust<br />

(and specific impulse)<br />

V<br />

ΔV<br />

m<br />

μ ⎛<br />

⎜ −<br />

1<br />

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