Difference between revisions of "IX-6315 "Dawn" Electric Propulsion System/ja"

Revision as of 21:26, 27 September 2014

IX-6315 "ドーン" 電気推進システム
Ion engine によって アイオニック・シンフォニック・プロトニック・エレクトロニクス
接続サイズ		S
コスト	(合計)	8 000.00
質量	(合計)	0.250 t
空気抵抗		0.2
耐熱温度		2000 K
耐衝撃性		7 m/秒
開発技術		イオン推進技術
開発導入費		16 800
バージョンから		0.18
Part configuration		ionEngine.cfg
最大推力	(1 atm)	0.05 kN
	(真空)	2.00 kN
比推力	(1 atm)	100 秒
	(真空)	4200 秒
燃料流量		0.486 /秒
消費電力		8.74 ⚡/秒
Testing Environments
On the surface		いいえ
In the ocean		いいえ
On the launchpad		いいえ
In the atmosphere		いいえ
Sub-orbital		はい
In an orbit		はい
On an escape		はい
ドッキング		いいえ
Test by staging		はい
Manually testable		はい
積載量		160 l

PB-ION Electric Propulsion Systemは電力とキセノンガスを動力源とする小型エンジンである。現実でもホール効果推進器として同様の物が実用化されている。VABとSPHのパーツ一覧では推進器でありながら"Utility"タブに分類されている。

Usage

This engine has a phenomenal fuel efficiency (4200 s I_sp), but very low thrust and requires an immense amount of electricity to operate. Xenon gas is provided by xenon containers like the PB-X150 Xenon Container. Electricity can be obtained using solar panels and radioisotope batteries. The amount of electricity needed to keep one ion engine running at full thrust is roughly equivalent to half the output of one Gigantor XL Solar Array (however one array will not power 2 engines), 12 PB-NUK Radioisotope Thermoelectric Generators, or 7 OX-STAT Photovoltaic Panels.

Batteries can be used to store the electricity since there may be times the solar panels will be blocked from the Sun by objects or the dark side of celestial bodies.

The ion engine is good for fine tuning of orbits. It is also a popular propulsion method for planes on planets on which jet engines don't work. Due to its great fuel efficiency it is also well-suited for interplanetary travel, but maneuvers take a long time to complete due to its low thrust-to-weight ratio - it is advised to use it for very small craft, and to use physics-warp while propelling with it.

It is practically impossible to build an ion-rocket which can defeat gravity on Kerbin, because the engine isn't even strong enough to lift itself against gravity, let alone itself and its fuel, a battery and a probe core. But when on a low-gravity moon like Minmus or Gilly it is possible to land, start, enter orbit and reach escape velocity with ion-propulsion alone. As of 0.23.5, it is technically possible to create an ion-powered probe, albeit with a minimum of parts, which will be able to defy Mun gravity. With that in mind, it is also possible to resist gravity with lightweight Ion craft on Duna, Moho, Dres, Eeloo, and every in-game moon with two exceptions: Laythe and Tylo have too high gravity for a single ion thruster, xenon tank, probe core, and battery.

Ion-powered "ferries" may also be useful for moving fuel, oxidizer and/or kerbonauts between two larger vessels, by keeping the large craft at such range that only one of them is within draw distance from the "ferry" at any moment, performance loss can be avoided. It is generally more fuel-efficient to move fuel and oxidizer between two ships using a ferry than it would be to dock the larger crafts together using their own engines and RCS.

Because it uses only about 0.485 units of xenon per second, one PB-X50R Xenon Container with 400 units of xenon can supply the engine for almost 14 minutes. The other larger tank PB-X150 Xenon Container with 700 units of xenon has enough to supply the engine more than 24 minutes.

Electrical consumption

The part.cfg lists the electrical consumption as 1.8 E which is the electricity consumed for 0.1 xenon. This is a ratio, and to propel 1 xenon an electricity of 18 E is required. As seen ingame, the fuel flow is 0.0485 kg/s or 0.4849 xenon/s. The electricity consumption is 8.7285 E/s.^[1] As the I_sp given in seconds needs to be multiplied with a slightly higher acceleration (9.82 m/s²) than g₀ (= 9.81 m/s²) the actual I_sp in m/s is higher and therefore the xenon and electrical consumption is lower.^[2]

ゲーム内の説明

ギャラリー

• 

  離陸滑走中のイオン推進式ソーラーグライダー。

• 

  飛行中のソーラーグライダー。

• 

  イオン推進式探査衛星。

変更点

0.23.5

• メーカー社名を"Ionic Protonic Electronics"から"Ionic Symphonic Protonic Electronics"へ変更。
• 説明文を変更。
• 推力を0.5から2へ、消費電力を12から1.8へ変更。

0.18

• 実装。

参考文献

1. ↑ Answer in the forum to Ion Engine consumes more energy than it should.
2. ↑ In File:10X Xenon.png 10 PB-Ion engines are running at full power and consuming a lower value than 10× the theoretical value.