at
Mountain Home Air Force Base In February 2003, Singapore joined the
Joint Strike Fighter program's System Design and Development (SDD) Phase, as a
Security Cooperation Participant (SCP). The first deliveries of the
F-35 Lightning II are not expected before 2021, but replacement for the bulk of the A-4SUs was needed by 2007. As a start, 20 F-16D Block 52+ have been delivered from 2003 under project Peace Carvin IV. The RSAF embarked on its Next Generation Fighter (NGF) programme to replace the aging A-4SUs. The original list of competitors was shortlisted to the final two –
Dassault Rafale and the
Boeing F-15SG Strike Eagle. The F-15SG is a variant of the F-15E Strike Eagle and is similar in configuration to the F-15K sold to
South Korea, but differs in the addition of the
APG-63(V)3 active electronically scanned array (AESA) radar developed by
Raytheon. The F-15SG is powered by two
General Electric F110-GE-129 thrust engines. The DSTA (Defense Science & Technology Agency) conducted a detailed technical assessment, simulations, and other tests to assess the final selection. On 6 September 2005, it was announced that the F-15SG had won the contract over the Rafale. An initial order placed in 2005 for 12 aircraft with the option to purchase 8 more. On 22 October 2007, Singapore's
Ministry of Defence (MINDEF) exercised the option to purchase eight more F-15SG fighters as part of the original contract signed in 2005. Along with this buy, an additional order for four F-15SGs was made, bringing the total number of F-15SGs purchased by the start of 2008 to 24. In January 2005, it was announced that 6
Sikorsky S-70B (derivative of
SH-60 Seahawk) naval helicopters will be purchased, complete with anti-surface and anti-submarine weapons and sensors. 2 more Seahawks were ordered in 2013. The Seahawks are operated by RSAF pilots, with System Specialists of the
Republic of Singapore Navy operating the sensors and weaponry. They operate from the Navy's new
Formidable class frigates, and when operating from land are based at Sembawang Air Base. All 20 AH-64D Longbow attack helicopters have been delivered to the RSAF. 12 of these were deployed back to Singapore and took part in combined arms exercises with the Army, with the remaining 8 helicopters being part of the Peace Vanguard detachment based in the United States. In April 2007, it was announced that the 4 E-2C Hawkeyes were to be replaced with 4 Gulfstream G550s fitted with the
IAI EL/W-2085 radar which would become the primary airborne early warning aircraft for the RSAF. Not included in the deal is an additional G550 as an AEW trainer, which will be acquired and maintained by ST Aerospace on behalf of RSAF. In July 2010, the
Alenia Aermacchi M-346 Master was selected by the RSAF to replace the A-4SU in the Advanced Jet Training (AJT) role, currently based at
BA 120 Cazaux Air Base in France. In a press release by the MINDEF on 28 September 2008, ST Aerospace had been awarded the contract to acquire twelve M-346 and a ground based training system on behalf of RSAF. As stipulated in the contract, ST Aerospace will act as the main contractor to maintain the aircraft after delivery by Alenia Aermacchi while Boeing would supply the training system. Delivery date is scheduled from 2012 onwards. The backbone of the transport fleet are the four KC-130B, one KC-130H and five C-130H Hercules transport aircraft, which are expected to remain in service through 2030, will be undergoing an extensive modernisation process to bring all ten existing airframes to the same common standard. The first airframe, a KC-130B, was returned to frontline service on 21 September 2010. ST Aerospace, the main contractor behind the project, is expected to upgrade the other nine airframes for the RSAF within the next seven years. Included in the package is the replacement of cockpit
flight management system with a modern
glass cockpit avionics suite, central engine displays to replace analogue gauges, improved voice communications, digital autopilot, flight director as well as a digital weather radar, which will make the aircraft
Global Air Traffic Management-compliant. Also, the C-130Bs will receive an
auxiliary power unit and
environmental control system in common with the C-130Hs. Once the upgrade is completed, this will effectively give the RSAF five KC-130Hs and five C-130Hs. In December 2010, the RSAF issued a letter of request to inspect stored ex-US Navy
P-3C Orion aircraft that have been retired from active duty. Lockheed Martin believes the RSAF has a requirement of 4 to 5 of these aircraft, which would be modernised extensively before reintroduction into active service. On 30 June 2018, Defence Minister
Ng Eng Hen announced that the F-16's replacement will be announced soon. Meanwhile, the KC-135Rs are being replaced by the A330 MRTT while replacements for other fixed-wing aircraft and helicopters are announced. On 18 January 2019, MINDEF officially confirmed the procurement of F-35s for a full evaluation of their capabilities and suitability before deciding on a full fleet to replace the aging F-16 fleet. On 1 March 2019, MINDEF announced that they will send a Letter of Request (LOR) to purchase 4 F-35s with an option of 8 more after the evaluation. On 9 January 2020 the U.S.
Defense Security Cooperation Agency approved a possible sale to Singapore of four F-35B short takeoff and vertical landing (
STOVL) variants with the option to purchase an additional eight F-35Bs and up to 13
Pratt & Whitney F135 engines and other related equipment for an estimated total cost of $2.75 billion. On 24 February 2023, MINDEF exercised its option and purchased an additional 8 F-35Bs currently on track for delivery by 2028, with the originally purchased 4 expected to be delivered by 2026. On 28 February 2024,
Dr Ng Eng Hen announced in parliament the procurement of 8 F-35A's expected to be delivered by 2030, tallying up a total of 20 F-35's on delivery. On 3 March 2025, Defence Minister Ng Eng Hen announced that the Fokker-50 Maritime Patrol Aircraft's replacement will be announced soon, with the
Boeing P-8A and
Airbus C295 in consideration. On 10 September 2025, new Defence Minister
Chan Chun Sing informed
US Secretary of Defense Pete Hegseth, that Singapore had decided to acquire 4 Boeing P-8As to replace the Fokker-50 Maritime Patrol Aircraft during his introductory visit to the US. Through its social media sites, the RSAF announced on 3 November 2025 that MINDEF/SAF will replace the
Hermes 450 (H450) UAV, which had been in service since 2007 and was 'becoming obsolete', with the
Hermes 900 (H900) Unmanned aerial vehicle (UAV). ==Equipment==