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Gulfstream II until G800

Gulfstream was once the synonym for large cabin business jets. This was essentially true until the arrival of the Bombardier Global Express. All large cabin business jets designed and built first by Grumman and now by Gulfstream Aerospace have large oval cabin windows as most characteristic feature. For the rest, they have the basic configuration typical for most bizjets: low mounted swept wings, a T-tail and jet engines attached to the rear fuselage. All Gulfstreams have a double wheel nose gear retracting forward, and double wheel main gears retracting inward. No nose gear doors are visible when the gear is extended. The dorsal fin gradually widens from the base and has air intakes at the side. There is an APU exhaust below the right engine.

Different versions

To differentiate between the subtypes of the Gulfstreams you have to look at

  • the shape of the cockpit windows
  • the number of cabin windows
  • the shape of the engine nacelles
  • the presence of wing tip tanks
  • the shape of the winglets
  • the top of the vertical stabiliser
  • the distance between cockpit windows and first cabin window

G.1159 Gulfstream II

The G-II has the fuselage of Gulfstream I turboprop, with its six flat, non-streamlined cockpit windows, mated to a swept wing without winglets or tip tanks. It has five cabin windows on each side. The nose is originally somewhat blunt, but many have been fitted with the more pointed nose of the G-III afterwards, like on the photo of the Gulfstream IISP below.

One G-II once flew as VC-11A for the US Coast Guard.

The Grumman G.1159 Gulfstream II is the only version without winglets and without tip tanks, making it easy to recognise.

This is the original, somewhat blunt nose of Gulfstream II, with six flat cockpit windows.

G.1159B Gulfstream IIB

This is a Gulftream II with the wings and winglets of the G-III. The transition between the wings and the winglets is with a sharp angle and that differentiates it from the Gulftreams IISP.

The Gulfstream IIB has the wings of the G-III and hence winglets with sharp angles.

The winglet attachment of the Gulfstream IIB and Gulfstream III is not curved.

Confusion possible with

Bombardier Global series

Global Express 9 ramen

The Global series are similar in appearance, but have more and smaller cabin windows and different style cockpit windows. Also there is an APU exhaust in the right side of the tail cone and an air intake in the root of the dorsal fin.

Canadair Regional Jet 700

CRJ700

The CRJ700 looks more like the Global above than a Gulfstream, and also has has many small cabin windows and different style cockpit windows. Typical is the APU exhaust at the end of the tail cone.

Grumman G.159 Gulfstream I

g.159

This may seem a strange entrance here at first, but leave out the prop engines, tail and wings and it is easy to mix up the G-I and G‑II. The wings are placed more aft on the G‑II than on the G-I though, and have a larger wing-body fairing on the jet version.

G.1159 Gulfstream IISP

After Gulftream invented the IIB the company Aviation Partners designed its own winglets for the Gulfstream II. Compared to the winglets of the IIB the transition between the wings and the winglets is curved.

This Gulfstream IISP has a more pointed, G-III style nose.

The curved attachment of the winglet of the Gulfstream IISP.

G.1159 Gulfstream IITT

The Gulfstream IITT is the only Gulfstream with tip tanks, so it is easy to recognise. For the rest it is the same as the standard G-II.

The large tip tanks are the distinguishing feature of the Gulfstream IITT.

G.1159A Gulfstream III

Starting with the Gulfstream III the Gulfstream jets have a more streamlined cockpit with four curved windows, and standard winglets. It has five cabin windows like the G-II, so the cockpit windows are the way to distinguish it from G-II variants.

The Gulfstream III is known by the US forces as the C-20A, C-20B, C-20C, C-20D and C‑20E.

A Gulfstream III shows its five cabin windows and four curved cockpit windows. Note the thrust reversers in transition.

These curved cockpit windows were used on all Gulfstream models from the G-III until the G550.

Gulfstream IV, IVSP, G300 & G400

This is a stretched G-III with wider diameter Rolls Royce Tay engines instead of the Rolls Royce Spey engines. Their nacelles have external fairings for the thrust reverser mechanism. The G-IV has six cabin windows on each side, one more than on earlier models. The G-IVSP is an enhanced G-IV, but it cannot be distinguished from the G-IV externally. When Gulfstream introduced new marke­ting designations the Gulfstream IVSP became the G400. The G300 has a smaller range and less standard options, but is otherwise the same. Both are externally not different from the G-IV and G‑IVSP. Note that the thrust reversers and their fairings are normally metallic, but sometimes they are painted to make the aircraft look like a G450!

Military versions of the G-IV are designated C‑20F, C‑20G and C-20H by USAF, US Army and US Navy, Tp102 and S102 by the Swedish forces and U-4 in Japan.

The Gulfstream IVSP has six oval cabin windows, but this is not unique. The external thrust reverser fairings are the key feature.

The painted thrust reversers of this Gulfstream IV, including the fairings, may make you think it is a G450, but the external fairings are still well visible.

Gulfstream G350 & G450

The G450 is a slightly stretched G400 with the nose (actually cockpit) of the G550. So it is longer, but this is only visible when you see a G-IV and G450 side-by-side, by the larger distance between the cabin door and the cockpit windows. The G450 can especially be distinguished from the other G-IV versions by the engine nacelles, with a different type of thrust reversers: compared to the G-IV it has no fairings on the outside which has clearly visible fairings for the reversers. Note that the normally metallic thrust reversers and fairings of the G-IV can be painted to make the aircraft look like a G450! See photo above.

Unfortunately Gulfstream pulls the same trick with the G450 as with the G400: there is a G350, which looks the same, but it has a smaller range and less standard options. There is one external feature which can tell you that you have a G350 in front of you: the absence of the EVS camera below the nose, which is standard on the G450 but optional on the G350.

Given the length and tail shape, the Gulfstream G450 is most likely confused with the Gulfstream IV.

The camera of Enhanced Vision System (EVS) under nose of a G450, on which it is standard.

Detail of the front of the G450. Note the larger distance between the cockpit windows and door compared to the G-IV.

The engine nacelles of the G450 have no external thrust reverser fairings.

Gulfstream G400 (GVII-G400)

The marketing name G400 is used for a second time on a three metre shorter version of the G500. It has same design characteristics as the G500 and G600: it has its new cockpit windows, winglets without a curve under an angle of 45 degrees compared to the wing, lower landing gear when on the ground, etc. The key recognition point are the five large oval cabin windows on each side.

Gulfstream G-V

This is a lengthened G-IV, but the G-V still has six windows on each side. Is identified by the MD‑80-like tail, the more streamlined engine nacelles without external fairings for the thrust reversers and the large space between the cabin door and the first cabin window.

C-37A is the American military designation of the G-V. The Israeli special mission variant is locally named Nachshon Shavit.

The Gulfstream G-V is visibly longer than the G-IV and G450, but still has six oval cabin windows

The tail of G-V has a short bump in front of the horizontal stabiliser, typical for the G-V and G550. Also note the streamlined nacelles.

There is a large distance between the cockpit windows and the cabin door of the G-V.

Gulfstream G500 (GVII-G500)

This was the shortest version of the based on the G650, until the launch of the even shorter G400. Like the G600 it has most often seven cabin windows on each side, but sometimes only six. To recognise it from the G600 you have to look at the distance between the main cabin door and the first window: this is larger at the G600 than the G500. For the rest it resembles its larger sibling: it has its new cockpit windows, non-curved winglets under 45 degrees compared to the wing, lower landing gear when on the ground, etc. However, the engine nacelles are different. Unlike the G650, G700 and G800, the G500 has thrust reversers at the very end of the nacelle. This is the same on the G600.

The Gulfstream G500 has seven cabin windows like the G600, which makes it quite difficult to distinguish them.

The thrust reversers of the Gulfstream G500 are at the very end of the nacelles, unlike on the G650 which you see in the back.

On the G500 the space between the first cabin window and the cabin door is about the width of the window.

Gulfstream G550 (and G500)

The G550 was originally going to be called G-VSP and is an improved version of the G-V. It is the last Gulfstream type based on the fuselage of the Gulfstream II (and even the Gulfstream I). It has seven windows on each side, and therefore easy to distinguish from the G-V. The G500 is a G550 with a smaller range and less standard options. Like the G350/450, the G500 and 550 are externally the same, except that the EVS below the nose is optional on the G500.
Only a few G500s were sold. Therefore the marketing name was later reused on the new aircraft based on the G650.

The US forces designate the VIP version of the G550 as C-37B. 

The Gulfstream G550 proves to be a popular platform for special mission aircraft, as it is in used as an airborne early warning and control aircraft with the air forces of Israel, Singapore, Italy and USA. In Israel they are named Nahshon-Eitam or Oron (depending on application), while Italy designates them as E-550A. The US Navy has a missile range support aircraft, named NC-37B. The EA-37B (originally designated EC-37B) of the USAF has the same external shape.
All feature large bulbs in the nose, tailcone, the side of the fuselage (it has no cabin windows) and on top of the vertical stabiliser. 

A Gulfstream G550, recognisable by its seven cabin windows but still G-III style nose.

The Nachshon Eitam is the Israeli airborne eraly warning version based on the G550.

Gulfstream G600 (GVII-G600)

The G600 fits between the smaller G500 and larger G650. You can recognise it by its seven cabin windows, although the smaller G500 often has seven cabin windows as well. To recognise the G600 from the G500 you have to look at the distance between the main cabin door and the first window: this is larger on the G600 than the G500, about the width of two windows. For the rest it looks like its siblings. Another way to distinguish the G600 from the G650 (and G700 and G800) is the fact that the G600 has its thrust reversers at the very end of the nacelle. They are further forward on the G650 (see photo at G500).

The distance between the cabin door and first cabin window is larger on the Gulfstream G600 than on the G500 with seven cabin windows.

A right side view on the Gulfstream G600.

Gulfstream G650 & G650ER (GVI)

The G650 was the start of a new family. It barely looks like the original; only the large oval cabin windows are a clear reminiscent of the earlier versions. For the rest it is a new aircraft:

  • a larger diameter fuselage
  • cockpit windows with a "swept" trailing edge of the aft windows
  • a new, high aspect ratio wing
  • winglets at an angle of 45 degrees with respect to the wings, not curved at the top
  • shorter main gear legs when on the ground
  • horizontal stabilisers with some dihedral

The G650 has eight cabin windows, one more than the G600 and one or two more than the G500. Additionally, the thrust reversers are slightly before the end of the nacelle, unlike on the G500 and G600.

The G650ER is the extended range version, externally not different from the standard G650.

On this full view the eight large oval cabin windows and short main landing gears of the Gulfstream G650 are clearly visible.

Also new on the G650 are the canted, non-curved winglets, which are attached to the wing tips at a 45 degree angle. Note the location of the thrust reverser, and compare it to the G500.

A new style of cockpit windows was introduced on Gulfstream G650, and later also used on the G500, G600 and subsequent variants.

Gulfstream G700 (GVIII-G700)

To be better able to compete head-on with the Bombardier Global 7500 the Gulfstream G650 was stretched to create the G700. The longer fuselage means room for more cabin windows, ten on each side. Another clear recognition point compared to the G500/G600/G650 are the curved winglets, especially near the top. They are still canted with regard to the wing tips.

The Gulfstream G700 has no less than ten large oval cabin windows, making it easy to recognise.

If you don't see the cabin windows you can distinguish the Gulfstream G700 by its curved winglets, although the G800 has these as well.

Gulfstream G800 (GVIII-G800)

The intended successor to the G650ER has the same fuselage, but then mated to the wings and tail of the G700. The G800 also has the same engines as the G700. From a recognition viewpoint this means that the eight cabin windows are no means to distinguish the G650 and G800. However, the slightly curved (tops of the) winglets are what to look for. 

So far we don't have a better photo of the Gulfstream G800, but at least you can see it has eight cabin windows like the G650.