Parachute

A Mk1-2 Command Pod hanging on a Mk16-XL Parachute

Parachutes are parts that when deployed slow down the speed of a craft in an atmosphere by creating drag. In career mode this allows to recover craft landed on Kerbin which returns funds.

While in theory it is possible to recover boosters like the Solid Rocket Boosters of the Space Shuttle with parachutes, it's difficult in practice because all craft without command pods outside the 2.5 km sphere around the controlled craft while in the atmosphere are removed. The timing has to be so that the circularization of the orbit with the main craft is not while the boosters are in the lower atmosphere.

Usage

The options on a Mk16 Parachute

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 craft 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 can't be used, for example, to aid in slowing a landing aircraft once it's already on the runway. The part's mass isn't affected when the parachute is cut. A deployed parachute will cut automatically during descent if propulsion is used to increase vertical speed past zero.

A deployed parachute can also be cut manually (right-click on parachute and executing Cut Parachute). Once cut, they can be repacked on EVA by a level 1+ engineer. (To do this, right-click on the parachute and click Repack Chute.) Repacked Parachutes can be deployed like fresh ones, although the staging sequence must be reordered to be able to stage them normally.

Icon	Meaning
	At rest / safe to deploy
	Not safe to deploy
	Released while unsafe and insufficient pressure
	Destroyed
	Risky / probably safe to deploy
	Semi-deployed
	Fully deployed

Changes were made to the staging icons in version 1.0.5. The staging background colour now indicates whether or not it is safe to deploy the parachute, being light grey when safe to deploy or at rest, a yellow-green colour to indicate that deployment may be risky (at around 250 m/s on Kerbin for main parachutes, nearly twice this speed for drogues) and dark red at any higher speed. The foreground colour (i.e. the colour of the parachute itself) indicates the state of the parachute, starting at white (unstaged/undeployed) and running through cyan (released but insufficient pressure to semi-deploy), yellow (semi-deployed), green (fully deployed) and bright red (destroyed).

A cyan parachute on a red background is therefore a highly undesirable combination since it means that the parachute has been released at too high a speed and will be destroyed as soon as air pressure is high enough for semi-deployment. Recovery will only be possible by slowing before air pressure rises, or (if time permits) by right-clicking the parachute to disarm it. Accidentally staging the parachute in space is therefore recoverable via the part's right-click window.

The mean parameters of the deployment are tweakable. The tweaking is possible in the small window popping up by right-clicking on the parachute in the editor or during the spaceflights:

Altitude (50-5 000 m) - The full deployment's altitude above ground level.

Min Pressure (0,01-0,5 atm) - The semi deployment's pressure threshold.

Parts

There are currently five 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)	Full-Deploy Altitude (m AGL)
	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 semi-deploy at a specific atmospheric pressure. which is situated in different altitudes on different bodies (rough semi deployment altitudes are shown below). Contrastingly, full deployment occurs depending on height above ground, not pressure. Deployment altitudes and pressures of various parachutes can be found in the above table.

Both of these deployment settings are tweakable; Although, the semi-deployment pressures are set at minimum by default, so it's only possible to delay semi-deployment by tweaking. A delayed semi-deployment, along with prior areobraking, can avert broken parachutes due to high temperature on reentry

		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

Trivia

Pre-0.18 Mk16-XL

Pre-0.18 Mk16

Before version 0.18 the image shown in the part selector of the VAB and SPH showed the parachute deployed. Since then all parachutes are shown stowed.