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For Hohmann transfers to an inclined orbit, Lambert iterations tend to give polar transfer orbits! This results in huge plane change expense at both ends, destroying the Hohmann transfer's advantage. A midcourse plane change can take much of the ridge out of the porkchop plot. But what is the...

Whan a transfer orbit is tangent to both departure and destination orbits, velocity vectors point in the same direction and no delta V is needed for direction change, only speed change. The most well known tangent transfer orbit is the Hohmann transfer orbit which links two coplanar, circular...

I believe Lagrange points have potential importance as hubs to low delta V "Space Super Highways", especially L1 and L2 regions. This community has already shown interest in one of my efforts, a Hohmann launch window schedule spreadsheet. I'm hoping some of you will use my L1 and L2...