Difference between revisions of "Parachute"
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| − | '''Parachutes''' are parts that when deployed slow down the speed of a craft in an atmosphere by creating drag. | + | '''Parachutes''' are parts that when deployed slow down the speed of a [[craft]] in an [[atmosphere]] by creating drag. If/when part reuse becomes part of the game, it might become important to attach parachutes to detached booster stages to help try to recover them. |
== Usage == | == Usage == | ||
| − | Parachutes are used on bodies with atmospheres such as [[Kerbin]] and [[Eve]] to slow the craft for a landing. The deceleration depends on both the | + | Parachutes are used on bodies with atmospheres such as [[Kerbin]] and [[Eve]] to slow the craft for a landing. The deceleration depends on both the mass of the craft and the density of the atmosphere. Therefore crafts that are either very heavy or land on bodies with thin atmospheres ([[Duna]], [[Laythe]]) require either multiple parachutes or additional engines for a soft landing. Parachutes can also be used to aid with [[aerobraking]] to create additional drag. On the other hand, a heavier parachute part generates more drag than a lighter parachute. Parachutes can also be used to help stop space planes as they land. |
| − | Parachutes require a minimum air pressure to deploy, so they will work neither in higher parts of atmospheres nor in a vacuum (see [[Parachute#Deployment|Deployment]]). In addition, parachutes are cut automatically on the ground and so can't be used to, for example, aid in slowing landing aircraft once they are on the runway. | + | Parachutes require a minimum air pressure to deploy, so they will work neither in higher parts of atmospheres nor in a vacuum (see [[Parachute#Deployment|Deployment]]). In addition, parachutes are cut automatically on the ground and so can't be used to, for example, aid in slowing landing aircraft once they are on the runway. The part's mass isn't affected when the parachute is cut. |
A deployed parachute can also be cut manually (right-click on parachute and executing ''Cut Parachute''). Once cut, they can be repacked by nearby Kerbals on [[EVA]] (right-click on parachute and executing ''Repack Chute''). Repacked Parachutes can be deployed like fresh ones. | A deployed parachute can also be cut manually (right-click on parachute and executing ''Cut Parachute''). Once cut, they can be repacked by nearby Kerbals on [[EVA]] (right-click on parachute and executing ''Repack Chute''). Repacked Parachutes can be deployed like fresh ones. | ||
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== Deployment == | == Deployment == | ||
| − | Parachutes deploy at different altitudes on different bodies, depending on the local atmospheric pressure. Rough deployment altitudes | + | Parachutes deploy at different altitudes on different bodies, depending on the local atmospheric pressure. Rough deployment altitudes are shown below. Note that full deployment depends on height above ground, not pressure. Full-deploy altitudes can be found in the above table. |
{{Deploy Table Parachutes}} | {{Deploy Table Parachutes}} | ||
Revision as of 08:33, 29 August 2013
Parachutes are parts that when deployed slow down the speed of a craft in an atmosphere by creating drag. If/when part reuse becomes part of the game, it might become important to attach parachutes to detached booster stages to help try to recover them.
Usage
Parachutes are used on bodies with atmospheres such as Kerbin and Eve to slow the craft for a landing. The deceleration depends on both the mass of the craft and the density of the atmosphere. Therefore crafts that are either very heavy or land on bodies with thin atmospheres (Duna, Laythe) require either multiple parachutes or additional engines for a soft landing. Parachutes can also be used to aid with aerobraking to create additional drag. On the other hand, a heavier parachute part generates more drag than a lighter parachute. Parachutes can also be used to help stop space planes as they land.
Parachutes require a minimum air pressure to deploy, so they will work neither in higher parts of atmospheres nor in a vacuum (see Deployment). In addition, parachutes are cut automatically on the ground and so can't be used to, for example, aid in slowing landing aircraft once they are on the runway. The part's mass isn't affected when the parachute is cut.
A deployed parachute can also be cut manually (right-click on parachute and executing Cut Parachute). Once cut, they can be repacked by nearby Kerbals on EVA (right-click on parachute and executing Repack Chute). Repacked Parachutes can be deployed like fresh ones.
Parts
There are currently four options for parachutes.
| Image | Part | Radial size | Cost (  ) |
Mass (t) |
Max. Temp. (K) |
Tolerance (m/s) |
Tolerance (g) |
Semi-Deployed Diameter |
Fully Deployed Diameter |
Semi-Deploy Pressure (atm) [Note 1] |
Full-Deploy Altitude (m AGL) [Note 1] |
|---|---|---|---|---|---|---|---|---|---|---|---|
 |
Mk16 Parachute | Tiny | 422 | 0.1 | 2 500 | 12 | 50 | 0.8 | 20.7 | 0.04 | 1 000 |
 |
Mk16-XL Parachute | Small | 850 | 0.3 | 2 500 | 12 | 50 | 2.5 | 51.2 | 0.04 | 1 000 |
 |
Mk2-R Radial-Mount Parachute | Radial mounted | 400 | 0.1 | 2 500 | 12 | 50 | 1.6 | 41.3 | 0.04 | 1 000 |
 |
Mk25 Parachute | Small | 400 | 0.2 | 2 500 | 12 | 50 | 0.9 | 6.3 | 0.02 | 2 500 |
 |
Mk12-R Radial-Mount Drogue Chute | Radial mounted | 150 | 0.075 | 2 500 | 12 | 50 | 1.3 | 7.7 | 0.02 | 2 500 |
Deployment
Parachutes deploy at different altitudes on different bodies, depending on the local atmospheric pressure. Rough deployment altitudes are shown below. Note that full deployment depends on height above ground, not pressure. Full-deploy altitudes can be found in the above table.
| Semi-Deployment Altitude (m) | ||||||
|---|---|---|---|---|---|---|
| Image | Part | Eve | Kerbin | Duna | Jool | Laythe |
| |
Mk16 Parachute | 44 226 | 20 004 | 10 689 | 126 238 | 25 146 |
| |
Mk16-XL Parachute | 44 226 | 20 004 | 10 689 | 126 238 | 25 146 |
| |
Mk2-R Radial-Mount Parachute | 44 226 | 20 004 | 10 689 | 126 238 | 25 146 |
| |
Mk25 Parachute | 46 315 | 23 547 | 14 912 | 134 228 | 31 829 |
| |
Mk12-R Radial-Mount Drogue Chute | 46 315 | 23 547 | 14 912 | 134 228 | 31 829 |
