UmbralRaptop changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is Fano. We currently target 1.3.1, 1.4.x, 1.5.1, and 1.6.1. <scott_manley> anyone that doubts the wisdom of retrograde bop needs to get the hell out | https://xkcd.com/323/ | <egg> calculating the influence of lamont on Pluto is a bit silly…
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<discord->
Butcher. — I had no active engines and planned a 3250 m/s burn. It said 65 seconds. That's way too short of RCS, but not correct for the engines either.
<discord->
Butcher. — I had no active engines and planned a 3250 m/s burn. It said 65 seconds. That's way too short for RCS, but not correct for the engines either. (edited)
<discord->
egg. — > if there's no RCS, it defaults to "really high" thrust
<discord->
Butcher. — Actual burn is ~53s.
<discord->
Butcher. — With a 21 kN engine.
<discord->
egg. — maybe the engines don't perform at max thrust thoughout?
<discord->
egg. — or there are steering losses?
<discord->
Butcher. — I think I just have a weird setup, as I was planning before decoupling, which throws off a load of mass.
<discord->
egg. — well yes, if you plan before decoupling you get garbage
<discord->
Butcher. — So it probably planned for the wrong mass.
<discord->
egg. — it uses the wrong mass, and possibly the wrong engines
<discord->
Butcher. — I used kOS to count dV rather than time in the end, which solved it.
<discord->
egg. — you need to decouple before you make a new flight plan
<discord->
egg. — the initial mass is stored in the flight plan
<discord->
Butcher. — I can't decouple, my RCS is on the decoupled stage.
<discord->
Butcher. — I basically has S1 [RCS] | S0 [Engines]
<discord->
egg. — yeah, in that case you're kind of screwed
<discord->
Butcher. — I basically have S1 [RCS] | S0 [Engines] (edited)
<discord->
Butcher. — Fair enough. My dV reckoning managed to get me close enough.
<discord->
Butcher. — It also takes into account thrust variance, which is handy.
<discord->
Butcher. — Being able to plan inertially fixed burns is really handy though. 😃
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