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About Teilnehmer

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    Spacecraft Engineer

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  • Website URL https://github.com/formicant

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  • Location Earth → Russia → Novosibirsk
  1. Version 1.9.3 Exception on Editor to Flight scene change fixed. After a scene change from Editor to Flight, the editor OnGui method keeps being invoked for some reason while the EditorLogic.fetch object is set to null. I’ve added a null check. It should be OK now.
  2. The Alpha Delta Challenge

    Multi-stage vessel with Δv = 4117 m/s. TWR (surface) never drops below 9.47. αΔ = 38988
  3. The Alpha Delta Challenge

    I’ve done some calculations. For single-stage vessels, the best αΔ (= TWR ∙ Δv) value is achieved when the total mass of engines equals a certain fraction of the total vessel mass, namely, mengines = mwet ∙ (et − e^(W(et) − 1) / (t − 1)), where  W is the Lambert function,  t is the tank ratio, i.e. the ratio between the dry tank mass and the wet tank mass. For t = 1/9 (most LfO and Lf tanks), mengines = 0.40055 mwet The value of αΔ is directly proportional to engine’s thrust and Isp and inversely proportional to engine’s mass. It does not depend on the engine count. The optimal engine would be the Twin-Boar if it wasn’t combined with such a large fuel tank. The actual optimal engine appeared to be the Mammoth with the optimal fuel amount of 20 t per engine. So, @CairoJack’s second entry seems actually to be the best among single-stage solutions! Not sure yet about multi-stage ones. BTW, one should use the TWR (surface) value instead of the local TWR as the latter depends on the altitude and thus is inconvenient for comparison.
  4. The Alpha Delta Challenge

    Great challenge! My suggestion is to introduce weight classes, e.g.: Below 1 ton Below 3 tons Below 10 tons Below 30 tons Below 100 tons Below 300 tons Unlimited
  5. Flyby-only grand tour

    The problem MedwedianPresident sets is too complicated even letting alone the trajectory errors. I’d suggest the following reformulation of the challenge rules: burns are permitted; the tour with the least total Δv wins. So we could approach the problem gradually. Every next participant would try to make their total Δv less, and eventually, we would come near the lower bound.
  6. Г Р А Д И Е Н Т

    Кстати, а в океан сплэшдаунать ступени какие проблемы вызывает? Нужна более прочная и тяжёлая конструкция?
  7. Г Р А Д И Е Н Т

    Это Realism Overhaul + RSS? Из 11 ускорителей только один возвращаемый?
  8. Г Р А Д И Е Н Т

    Насколько это реально — посадить ступень в заданную точку (на баржу) с парашютом при наличии ветра?
  9. Речь идёт только об именах Кербонавтов, генерируемых игрой автоматически. Фильтр пытается исключить имена с труднопроизносимыми буквосочетаниями, а также нежелательные созвучия, в том числе, с обсценными словами.
  10. Version Updated to KSP 1.3.1
  11. Version 1.9.2 Updated to KSP 1.3.1
  12. Version Updated to KSP 1.3.1
  13. Как это по-русски

    Сшитые конические сечения — это реально используемый термин? Не могу нагуглить. Я бы передал patched conics как кусочно-коническая аппроксимация. Но тоже только одна гуглоссылка. А как на самом деле patched conics по-русски?