Thomas C. Theiner Profile picture
Feb 25, 2025 29 tweets 12 min read Read on X
The Gripen was designed by Sweden for Sweden's Bas 90 air base system and - truly - Sweden built the perfect fighter for Sweden's Bas 90 system... which resulted in a fighter no one but Sweden needs.

Bear with me as I explain a few things @Saab doesn't want you to know.
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Bas 90 was developed in the 1970s, when the Swedish Air Force was flying the Viggen (and some upgraded Draken). Bas 90 consisted of some 30+ reserve air bases with a 2,000+ metres (6,600+ ft) long main runway and 2-3 short runways of 800 metres (2,600 ft).
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Here are the airbases of Kubbe (63°37'59.81"N 17°56'10.79"E) and Jokkmokk (66°29'48.43"N 20° 8'45.17") with the short runways highlighted in red.

Some of the short runways used public roads, but most were built specifically for the Bas 90 system in the 1980s.
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These short runways (or Kortbanor) were only meant to be used as backup in case the main runway was damaged. And their use was limited to daytime and good weather operations. And they were too short to get a fully loaded and fuelled fighter in the air. And they were not road
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runways. Sweden's road runways were built as part of the earlier Bas 60 air base system and they were much longer (1,500–2,000 metres / 4,900–6,600 ft) and a bit narrower (12 metres / 39 ft) than the Kortbanor runways (Width: 17 metres / 56 ft). So when people say the Gripen
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can take off from roads - that is true; and when they say the Gripen can take off from short runways - that is true too, but (!) the limitations are still that these operations are limited to daytime and good weather, and that on a short runway the Gripen is limited to
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air-to-air loads only.
Not just the Gripen, but every Western fighter (F-15, F-16, F/A-18, F-22, F-35, Eurofighter, Rafale), was designed for short take offs and road runways. And all of them share the same limitations.

(Pic: a F/A-18 takes off from a road runway in Finland)
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In short: if a Gripen can take off from a runway, then so can every other Western fighter with the same configuration.

In peacetime every Bas 90 was guarded by a dozen men. During wartime one of 33 Basbataljon 85 would have manned each base and this has led to Gripen fans
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constantly mention that "conscripts can rearm and refuel the Gripen in 10 minutes".

Cool, cool... I and any five of my followers can do that after 10 minutes of training too.

Let's look at refueling: one photo shows the refueling of an F-35B and the other of a Gripen C.
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The nozzles are the same, so any fighter can be refueled at any NATO base... and every NATO conscript can do that in minutes.
Saab also likes to mention that you can "hot refuel" the Gripen, which means refuel while the engine runs... every Western fighter can do that.
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Now when it comes to weapons, again - every NATO conscript can do it... because the Gripen uses almost only NATO missiles, bombs, pods etc.
Only 1 weapon system you attach to the Gripen is a pure Swedish design.
In short: if Swedish conscripts can refuel and rearm a Gripen
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10 minutes, so can any other Western conscript crew with a fighter with the same weapons load.

The Gripen was designed in the 1980s for dispersed operations on the Bas 90 bases. And it excels at that... but every other Western fighter was designed with the same in mind.
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Gripen fans confuse all of these operational variants, short runways, road runways, dispersed operations, conscripts, etc. and believe it is unique to the Gripen... but Bas 90 bases are still air bases. A Basbataljon 85 consisted of 1,500 to 2,700 men, because
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even though few troops are needed to mount weapons on a Gripen and refuel it, staff, logistics, meteorology, base defence, medics, quartermaster, air traffic control, fire fighting, engineers, etc. etc. require 100s of additional personnel.
Sure, you can deploy a Gripen with
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just a ground support element of 6 people... if you embed them in an allied base.
In short: The Gripen needs as many troops to operate as any other Western fighter. And the number of personnel tasked with rearming and refueling are for all fighters similar.
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It just takes 12 (!) airmen to operate an F-35 contingency location, where two F-35 can be refueled and rearmed at the same time.
Also every Western fighter carries more ammo and fuel than a Gripen... and while the F-35A carries most fuel (18,250 lb), the F-15EX carries most
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ammo (29,500 lb; to compare the B2 stealth bomber carries 40,000 lb).

I mention fuel and ammo, because the Gripen didn't need much of the former and few of the latter to excel at its original mission - to intercept Soviet fighters, bombers and ships over the Baltic Sea.
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In short: the Soviets were considered to be the only threat and to attack Sweden they had to cross the Baltic Sea or fight through Finland. Therefore scrambling fighter jets and intercept aerial threats respectively lob anti-ship missiles at Soviet amphibious landing ships
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were key missions for the Swedish Air Force. Therefore the SH 37 Viggen maritime reconnaissance fighter and the AJ 37 Viggen strike fighter carried two RB 04 anti-ship missiles, while the JA 37 Viggen fighter carried two Skyflash air-to-air missiles... which would have been
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lobbed at Soviet forces approaching Sweden.
This required the fighters to fly just a short distance out over the Baltic Sea: at maximum 300-400 km from the air bases furthest infland.
And when the Gripen was designed with a weaker engine than the Viggen (54 kN vs. 72 kN) the
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Gripen's internal fuel tanks were designed 40% smaller than the Viggen's (5,000l vs. 3,000l).
Not a problem if you have to take off, fly 200km and then lob an AIM-120 AMRAAM air-to-air missile or a RBS-15 anti-ship missile at Soviet targets. But for most other air forces
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wholly inadequate. Sure you can mount external fuel tanks on the Gripen... which increases drag, reduces speed, increases fuel consumption, and blocks hardpoints, of which the Gripen has just 8.
A Rafale can mount three external fuel tanks and still have 11 hardpoints free.
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(And a Rafale carries more than double the Gripen C's internal fuel).
The Gripen was designed to defend Sweden and for that mission it was always an excellent choice... but Sweden was a neutral country, where the enemy would most likely come from the sea... which makes the
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Gripen C an ideal fighter for i.e. neutral Ireland, but not for Canada (due to its vast size), or the UK (due to the RAF having to patrol 1,000s of km into the North Atlantic and fly to attack russian forces in Eastern Europe.
The Gripen offers no advantage in operations or
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maintenance, it carries less fuel and ammo than any other fighter, it has neither stealth nor supercruise (The Gripen NG test aircraft flew a few miles at supersonic speed after having switched off the afterburner - that's not supercruise that cheating) and, unlike the
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Gripen C, which was cheaper than other Western fighters, the new Gripen E is more expensive.
The small production with just 10 aircraft per year is too small for economies of scale... to compare: Lockheed Martin produces more F-35 every 3 (!) weeks.
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No Air Force in its right mind will buy a Gripen... especially no Air Force, which wants to buy a non-American design, because while the Gripen A/B's engine was a licensed produced GE F404 engine and the Gripen C/D's engine was Swedish built version of the GE F404, the
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Gripen E/F engine is an American made GE F414-39E engine. Engine production in Trollhättan ceased in 2012 and GKN Aerospace in Trollhättan does only provide engine product support.
Summary: the Gripen was designed in the 1980s for the defence of Sweden and excelled at that.
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Nowadays every Western fighter in production outclasses the Gripen C and in most aspects also the Gripen E, which is also more expensive than the best Western fighter the F-35A.
And thus, if you want to buy a European fighter the only options are: Eurofighter and Rafale.
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• of course NATO is unprepared for the use of drones like the war IN (!) Ukraine,
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Gripen fans keep hyping the Gripen with fake claims & as long as they do, I will counter them:

Scandinavian Air Force officer about the Gripen E: It can either be fully fueled or fully armed or flown from short runways. Never can 2 of these things be done at the same time.
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The Gripen fans keep claiming that the Gripen has a better range than the F-35 and can fly from short runways... then admit that its max. range can only be achieved with external fuel tanks, which weigh so much that the Gripen E can no longer fly from short runways.
2/n
External fuel tanks also mean: the Gripen becomes slower, the radar cross section increases (making detection more likely), the fuel consumption increases,... and even with all 3 external fuel tanks the Gripen E carries 1,340 kg less fuel than the F-35A carries internally.
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Read 25 tweets
Feb 2
Gripen fans continue to spam my mention with claims how fantastic Sweden's Bas 90 and Gripen combination is... and that it would work for Canada's North too...

Ok, let's quickly compare Canada's three northern territories (Yukon, Northwest, Nunavut) and Sweden... ...
1/6
Land area:
🇸🇪 450,295 km2 (173,860 sq mi)
🇨🇦 terr.: 3,593,589 km2 (173,860 sq mi)

The land area of just the three territories (without Canada's 10 provinces) is already 8 times bigger than all of Sweden...
(In total Canada's land area is 9,984,670 km2
2/6
(3,855,100 sq mi) or 22 times Sweden).

Population:
🇸🇪 10.61 million
🇨🇦 terr.: 0.13 million

Sweden's population is 81.6 times bigger than that of the three territories... and if you look at population density:
🇸🇪 23,6/km2
🇨🇦 terr.: 0,013/km2
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Read 6 tweets
Feb 1
Saab loooves to tout the claim that the Gripen can "operate from dispersed air bases".

They do that, because they know no one of you knows what it means. And every time I see someone regurgite "dispersed air bases" (or "road runways" or "short runways") I know I am dealing
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with someone, who knows absolutely nothing about the topic.
So allow me to take you on a deep dive into what "operating from dispersed air bases" actually means.
Let's start with Såtenäs Air Base in Southern Sweden - the most important Swedish air base.
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When the Viggen entered service, Såtenäs received it first.
When the Gripen entered service, Såtenäs received it first.
When the Gripen E entered service, Såtenäs received it first.

In the 1950s Sweden developed the Bas 60 system, which would have dispersed the Swedish
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Read 36 tweets

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