The R-101 Delphinus #1 is an original aircraft introduced in Ace Combat 3: Electrosphere and later added to Ace Combat Infinity.

Its inclusion in Infinity marks the first time an Ace Combat 3 aircraft was featured in another Ace Combat game.


Produced in the first half of the 21st century, the Delphinus #1 laid the foundation for Neucom's R-numeral series of aircraft. The jet was developed using Neucom's expertise in the aviation field, being built from newly developed composites and alloys. It is powered by high-powered turbofan engines, and uses laminar flow control technology to dynamically manage airflow. The R-101 pioneered the AI-handled development techniques employed by Neucom by 2040.[1]



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The R-101 was the main fighter aircraft of Neucom's armed forces during the Intercorporate War, where it served on the frontlines. It was eventually upgraded into the R-102 and R-103. An export model, the R-101U, was sold to the UPEO to reinforce their own air fleet.[2]

Infinity universe

The R-101 was developed by Neucom in the Infinity universe as well. After its design was created, Neucom sold the plans to Wernher and Noah Enterprises to be developed under their Advanced Automated Aviation Plants for use among United Nations Forces mercenary pilots.

Game Analysis

Ace Combat Infinity

"Developed by Neucom, the Delphinus series of aircraft forms the core of the "R-numeral" fleet. This is the first aircraft within the Delphinus series. It uses technology from Neucom, the leading company in the aerospace industry. 90% of its airframe structure is comprised of new materials and it also features a newly developed high power engine. In addition, the airflow across the aircraft surface is controlled dynamically via laminar flow control technology. When this aircraft was first revealed, it's[sic] state of the art technology captured the attention of people around the world including military personnel.
*The in-game screen display will change to a design inspired by ACE COMBAT 3 when this aircraft is used."

How to Unlock

The R-101 Delphinus #1 can be unlocked through the Aircraft Tree.

Special Function

The R-101 is the first aircraft in Infinity to come with special features. When flying an R-101, the player's HUD will look similar to that from Ace Combat 3: Electrosphere in all three camera views. The sound effects for locking on and firing a missile are replaced by those from Ace Combat 3 (the standard high-pitched tone for standard missile lock, and a lower-pitch tone for special weapon lock). The "Destroyed" display is also replaced by "Bingo" or "Bulls Eye", complete with the female voice-acted line from Ace Combat 3 for each. In addition, during Mission Updates, the preview image at the top-right will slide into and out of view instead of popping in and out on the standard HUD.
Stats and Prices Lv.1-10
Lv. Cst SP MO ST AA AG DF Price
1 825 B+ B D+ A D D+ 4,590,000
2 874 B+ B+ D+ A D+ C 2,727,000
3 923 A A C A+ D+ C+ 3,942,000
4 972 A+ A+ C S D+ B 4,644,000
5 1021 S A+ C+ S D+ B+ 7,047,000
6 1070 S S C+ S C A 14,850,000
7 1119 S+ S+ C+ S+ C A+ 7,290,000
8 1168 S+ S+ C+ S+ C S 8,100,000
9 1217 S+ S+ B S+ C S+ 8,910,000
10 1266 S+ S+ B S+ C S+ 9,990,000
Stats and Prices Lv.11-20
Lv. Cst SP MO ST AA AG DF Price
11 1317 S+ S+ B S+ C S+ 11,070,000
12 1368 S+ S+ B+ S+ C S+ 12,690,000
13 1419 S+ S+ B+ S+ C+ S+ 13,500,000
14 1417 S++ S++ A S+ C+ S++ 15,525,000
15 1521 S++ S++ A S+ C+ S++ 17,010,000
16 1591 S++ S++ A S++ C+ S++ 22,464,000
17 1654 S++ S++ A+ S++ C+ S++ 25,650,000
18 1717 S++ S++ A+ S++ B S++ 28,863,000
19 1780 S++ S++ S S++ B S++ 36,882,000
20 1843 S++ S++ S S++ B S++ 46,521,000

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Weapon Ammo Lv.1-10
1 520 124 24
2 590 126 28
3 660 128 32
4 730 130 36 20
5 800 132 40 21
6 856 134 44 22
7 912 136 48 23 48
8 968 138 52 24 52
9 1024 140 56 25 56
10 1080 142 60 26 58
Weapon Ammo Lv.11-20
11 1136 146 62 27 60
12 1192 150 64 28 62
13 1248 154 66 29 64
14 1309 158 68 30 66
15 1360 162 72 32 70
16 1417 164 74 33 72
17 1472 166 76 34 74
18 1528 168 78 35 76
19 1584 170 80 36 78
20 1640 172 84 38 82

Part Slots
These are the minimum / maximum part slots this aircraft carried at the respective levels. Part slots could be added until they reach maximum by repeatedly sortieing with the aircraft; see Tuning for more information. A maximum of 7 parts could be equipped at any time, regardless of available slots.

BODY / Max ARMS / Max MISC / Max
Lv.1-5 29 / 38 27 / 38 28 / 38
Lv.6-14 31 / 40 29 / 40 30 / 40
Lv.15-19 32 / 41 30 / 41 31 / 41
Lv.20 33 / 42 31 / 42 32 / 42

Upgrading this aircraft to these levels unlocked the respective nicknames for use at any time.

  • Lv.3: SARF
  • Lv.10: NEU Consulting Pilot
  • Lv.15: Chief Consulting Pilot
  • Lv.20: Sky Gangster


  • Default: Air superiority gray


Ace Combat 3: Electrosphere

"The first unit in the "Delphinus" mainline fighter series, a core part of Neucom's brand new "R numeral" aircraft lineup. Many of Neucom's world leading aviation and space industry technologies found their way onto this craft. There are too many advances to mention completely, but some include the use of new materials in about 90 percent of its construction, new high thrust engines, and laminar flow control technology to dynamically manipulate the air on the craft's surface."
Ace Combat 3: Electrosphere - Namco Official Guide Book

How to Unlock

  • Japanese version: Two versions of this aircraft are available, depending on which branch the player chooses.
  • International version: Complete "Scramble" with an A rank.


Power: Low
Mobility: Low-Medium
Stability: Low
Armor: Minimal
Attack: Low


  • Length: 20.48m
  • Width: 12.6m
  • Height: 4.10m
  • Weight: 8,098 kg
  • Max Speed
    • Japanese Release: 2,856 km/h
    • International Release: 3,992 km/h
  • Armor: Light




  • "Delphinus" is Latin for "dolphin". The word is used as the genus for the common dolphin as well as the constellation Delphinus.
  • The YR-99 Forneus from Ace Combat X: Skies of Deception bears a resemblance to the R-101. Coincidentally, both aircraft use laminar flow control technologies, likely implying that Simon Cohen used the Forneus as an inspiration for the Delphinus in the Nemo Project, but it is unknown whether the R-101 was already developed by that time.
  • Despite this aircraft having a UPEO variant, the export version of Ace Combat 3: Electrosphere uses the standard Neucom paint scheme for the playable R-101, with the only difference being the Neucom emblem on the vertical stabilizer being replaced with the UPEO emblem. This is also in spite of the export version having the R-101U in-game.[3]


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