Radial size/it

Raffronto dei diametri radiali con un Kerbal come misura. Dall'alto in basso: Minuscolo (Dimensione 0), Piccolo, Grande, ed Enorme (Dimensione 3).

Il diametro radiale è il diametro delle sezioni delle parti sulle quali è possibile espandere o assemblare una navetta. Se la posizione di montaggio non è radiale, allora la parte può essere o rotonda o di una delle due forme speciali. Alcune parti rettangolari come il Pannello Strutturale M-1x1 non presentano un diametro radiale o sono approssimati al diametro successivamente più grande come il Probodobodyne QBE. Ci sono quattro diametri radiali con nomi diversi. La scala dimensionale richiama le definizioni specifiche delle parti come ad esempio l'Adattatore Mk2 > 1.25m usano il termine "Dimensione" per quantificare la grandezza con numeri interi. Questo parametro inizia con 0 in quantro molti valori nel linguaggio macchina iniziano con default 0 invece che 1.

Qualsiasi parte con un nodo di assemblaggio può essere collegata a qualsiasi altra parte a prescindere dal diametro. Tuttavia, parti più piccole hanno nodi di assemblaggio più piccoli, che risultano in collegamenti più fragili, quindi collegando una parte da 1.25m di diametro fra due parti da 3.75m, ad esempio, renderà la costruzione instabile e tendente alla rottura sotto sforzo. Abbinare correttamente i diametri radiali rende inoltre un razzo più gradevole all'aspetto, ed esistono alcuni adattatori strutturali per transizionare da un diametro ad un altro mantenendo comunque la linea della fusoliera continua ed ininterrotta.

Dimensioni

Diametro radiale	Rapporto carburante/m			Tolleranza all'impatto tipica	Temperatura massima tipica
	Carburante per Razzi	Carburante Liquido	Monopropellente
Minuscolo / 0.625m	115	n/a	213	6 m/s	2000°
Piccolo / 1.25m	213	n/a	438	6 m/s	2000°
Grande / 2.5m / Rockomax	853	n/a	750	6 m/s	2000°
Enorme / 3.75m / Kerbodyne	1925	n/a	n/a	6 m/s	2000°
Mk1	n/a	213	n/a	20 m/s	2000°
Mk2	213	213	213	40 m/s	2200°
Mk3	1000	1000	1000	50 m/s	2300°

Razzi

The typical mass ratio for rocket fuel is 9.

• Tiny / 0.625m. Typically used for probes and nose electronics.
• Small / 1.25m. The most common size, and the primary size available at the beginning of the game, and about the same relative size to kerbals as the Redstone's tanks to humans.
• Large / 2.5m / Rockomax. This size is about the same relative size to kerbals as the Atlas V or Falcon 9's tanks to humans.
• Extra Large / 3.75m / Kerbodyne. Styled after NASA's real-world Space Launch System, which uses Rocketdyne RS-25 and RL10 engines.

Spaceplane

Spaceplane parts may carry either rocket fuel or liquid fuel. Compared to rocket parts they tend to have a poorer mass ratio (usually about 8), but better crash tolerance and maximum temperature.

• Mk1. Like the 1.25m rocket size, this size is a cylinder. All inline air intakes are of this size, but there are no rocket fuel tanks.
• Mk2. With its side chines, this spaceplane size is reminiscent of the real-world Lockheed SR-71 Blackbird. It is between the 1.25m and 2.5m sizes in cross-sectional area. These parts feature a small amount of lift.
• Mk3. Reminiscent of the real-world Space Shuttle. The cross-sectional area is similar to the 3.75m rocket size, that is, two Mk3 tanks stacked and then offset into each other will stack seamlessly with a 3.75 meter tank.

Adapters

• 1:1 parts between the same size are not shown.
• Note that all parts can be reversed so a nosecone can serve as a tail and vice versa.
• Fairings (Airstream Protective Shells) can be placed inline and thus serve as adapters as well as nosecones.

		Fore size
		Nose	Tiny	Small, Mk1	Mk 2	Large	Mk 3	Extra Large
Aft size	Tail			Tail Connector A Tail Connector B			Mk3 Cargo Ramp
	Tiny	Small Nose Cone CH-J3 Fly-By-Wire Avionics Hub Stayputnik Mk. 1
	Small, Mk1	Advanced Nose Cone - Type A Advanced Nose Cone - Type B AE-FF1 Airstream Protective Shell (1.25m) Aerodynamic Nose Cone Mk1 Cockpit	FL-A10 Adapter FL-A5 Adapter NCS Adapter Mk1 Command Pod	TVR-200 Stack Bi-Coupler (2) TVR-1180C Mk1 Stack Tri-Coupler (3) TVR-2160C Mk2 Stack Quad-Coupler (4)	Mk2 Bicoupler (2)	Rockomax Brand Adapter 02 TVR-200L Stack Bi-Adapter (2) TVR-300L Stack Tri-Adapter (3) TVR-400L Stack Quad-Adapter (4)
	Mk2	Mk2 Cockpit		Mk2 to 1.25m Adapter Mk2 to 1.25m Adapter Long
	Large	AE-FF2 Airstream Protective Shell (2.5m) Protective Rocket Nose Cone Mk7		C7 Brand Adapter - 2.5m to 1.25m C7 Brand Adapter Slanted - 2.5m to 1.25m Rockomax Brand Adapter Mk1-2 Command Pod PPD-12 Cupola Module	2.5m to Mk2 Adapter
	Mk3			Mk3 Cockpit	Mk3 to Mk2 Adapter	Mk3 to 2.5m Adapter Mk3 to 2.5m Adapter Slanted
	Extra Large	AE-FF3 Airstream Protective Shell (3.75m)				Kerbodyne ADTP-2-3	Mk3 to 3.75m Adapter

Assets

When creating assets, the correct diameter for a desired model can be found in the table below. The "meter scale" refers to the actual model's diameter, which is then typically scaled up via the default rescaleFactor of 1.25, to give the "actual" in-game diameter. Size scale is used to denote the standard when selecting a node size.

Conversion table between the different definitions

Name	Size scale	Meter scale	Actual size	Example
minuscolo	0	0.5 m	0.625 m	Rockomax 48-7S
piccolo	1	1 m	1.25 m	LV-T30 Liquid Fuel Engine
grande	2	2 m	2.5 m	Rockomax "Mainsail" Liquid Engine
Molto grande	3	3 m	3.75 m	Kerbodyne KR-2L Advanced Engine

As a special radial size Montaggio radiale appears. Parts like Rockomax 24-77 so lack general metric counterparts as to eliminate confusion.

Non-cylindrical sizes named “Mk2”, and “Mk3” exist and are used by fuselage parts intended for spaceplanes.

Additional sizes

Several addons add additional, usually larger, radial sizes which are roughly following the stock size scale. There are up to 9 meter parts in the B9 Aerospace mod and mods like Tweakscale can scale parts more freely.

Two new official radial sizes will be introduced in the DLC Making History: the Medium / 1.875 m and the Huge / 5 m, along with the parts that use them. Currently, there are mods that add these sizes: the M.O.L.E. and Homegrown Rockets add the Medium size, and the SpaceY mod adds the Huge size.