FNRS-2
First bathyscaphe
title: "FNRS-2" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["deep-submergence-vehicles", "piccard-family", "submarines-of-belgium", "trieste-class-deep-submergence-vehicle"] description: "First bathyscaphe" topic_path: "general/deep-submergence-vehicles" source: "https://en.wikipedia.org/wiki/FNRS-2" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary First bathyscaphe ::
::data[format=table title="Infobox ship"]
| Field | Value |
|---|---|
| display_title | ital |
| section1 | {{Infobox ship/image |
| section2 | {{Infobox ship/career |
| flag | |
| name | FNRS-2 |
| completed | 1948 |
| in_service | 1948 |
| out_of_service | 1948 |
| fate | Rebuilt as FNRS-3 |
| section3 | {{Infobox ship/characteristics |
| type | Deep-submergence vehicle |
| length | 15 m |
| beam | 3.2 m |
| draft | 6 m |
| power | 1kW electric motor |
| speed | 0.5 kn |
| endurance | 24h |
| test_depth | 4000 m |
| complement | 2 |
| :: |
|display_title=ital |section1={{Infobox ship/image |image= |image_caption=
|section2={{Infobox ship/career |hide_header= |country= |flag= |name=FNRS-2 |ordered= |awarded= |builder= |original_cost= |laid_down= |launched= |sponsor= |christened= |completed= 1948 |acquired= |commissioned= |recommissioned= |decommissioned= |maiden_voyage= |in_service=1948 |out_of_service=1948 |renamed= |reclassified= |refit= |struck= |reinstated= |homeport= |identification= |nickname= |fate= Rebuilt as FNRS-3 |notes= |badge=
|section3={{Infobox ship/characteristics |hide_header= |header_caption= |type=Deep-submergence vehicle |tonnage= |displacement= |length= 15 m |beam= 3.2 m |draft=6 m |power=1kW electric motor |propulsion= |speed= 0.5 kn |range= |endurance= 24h |test_depth= 4000 m |complement=2 |sensors= |armor= |notes= ::figure[src="https://upload.wikimedia.org/wikipedia/commons/e/e0/FRNS_III_(HDR)_01.jpg" caption="Tour Royale]] in Toulon."] ::
The FNRS-2 was the first bathyscaphe. It was created by Auguste Piccard. Work started in 1937 but was interrupted by World War II. The deep-diving submarine was finished in 1948. The bathyscaphe was named after the Belgian Fonds National de la Recherche Scientifique (FNRS), the funding organization for the venture. FNRS also funded the FNRS-1 which was a balloon that set a world altitude record, also built by Piccard. The FNRS-2 set world diving records, besting those of the bathyspheres, as no unwieldy cable was required for diving. It was in turn bested by a more refined version of itself, the bathyscaphe Trieste.
FNRS-2 was built from 1946 to 1948. It was damaged during sea trials in 1948, off the Cape Verde Islands. FNRS-2 was sold to the French Navy when FNRS funding ran low, in 1948. The French rebuilt and rebaptised it FNRS-3. It was replaced by the Archimède. In February 1954 the FNRS-3 reached a depth of 4050 m in the Atlantic, 160 miles off Dakar, beating Piccard's 1953 record by 900 metres.
Sea trials
FNRS-2 went for sea trials accompanied by the 3,500 t Belgian ship Scaldis, as its tender. However, Scaldis's crane was not strong enough to lift FNRS-2 while its float was filled, and this proved to be the detail that would end FNRS-2 career. An unmanned test dive to 4600 ft was successfully completed, but owing to technical problems, the support crew were unable to empty its float of the gasoline that was used for buoyancy. Scaldis attempted to tow FNRS-2 back to port, but it was battered by ocean waves and sprang a gasoline leak. After the leak was detected, the gasoline was dumped into the sea and FNRS-2 was raised. However, there was no reserve of gasoline for replacement, nor funding to fix the float.
References
Bibliography
- Le Bathyscaphe, en collaboration avec Pierre Willm, Éditions de Paris, 1954
- La Découverte sous-marine, Éditions Bourrellier, 1959
- 20 ans de Bathyscaphe, Éditions Arthaud, 1972
- Le bathyscaphe - à 4500 m. au fond de l'océan
- Bathyscaphe le à 4050 m au fond de l'océan
- 2000 Fathoms Down
References
- ''[[Encyclopædia Britannica]]'', 2010 Online, 9 September 2010 (accessed 9 September 2010)
- (1 March 1954). "Deepest Divers".
- Heppenheimer, T. A.. (Summer 1992). "To the Bottom of the Sea".
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