RX-121-1 Gundam TR-1 ［Hazel Custom］

The RX-121 Gundam TR-1 [Hazel] Custom is the upgrade of the RX-121 Gundam TR-1 Hazel from the Universal Century timeline. Appearing in the Advance of Zeta: The Flag of Titans manga.

Technological and Combat Characteristics
After Lt. Wes Murphy's Gundam TR-1 [Hazel] is heavily damaged in combat with Zeon remnants, it is repaired and improved using a RGM-79Q GM Quel stationed at Konpeitoh and spare Hazel parts stored aboard the Aswan. This "Hazel Custom" reflects the combat data and development know how accumulated by the original Hazel. The machine's enhancement parts, which previously seemed like an afterthought, have been better balanced with the other parts and the machine's internal structure to make it a more complete mobile suit. As a result, its external appearance has a more unified feel, and its lighter weight and increased thruster output give it roughly 10% greater acceleration. A 360-degree panoramic monitor and linear seat system have been installed in its cockpit on an experimental basis, and its operating system has also been upgraded, so this machine's operation is greatly advanced from the original Hazel. The model number of this rebuilt Hazel has been shifted from RX-121 to RX-121-1. Because the Hazel's unique shield boosters were lost in its previous battles, the Hazel Custom is equipped with a normal shield for the time being. The loss of the shield boosters admittedly reduces the Hazel Custom's mobility, but its overall performance increase is enough to make up for this. Due to its redeployment schedule there wasn't time to repaint the machine in Titans colors, so most of its armor remains the grey color in which it was molded.

The Hazel Custom's basic specs, including its generator and thruster performance, are similar to those of the GM Quel. Its leg sections house thermonuclear rocket engines with an output of 17,500 kg apiece, and its backpack is equipped with the same movable booster pod as the original Hazel. The thermonuclear reactor inside this pod serves as both a supplemental generator and a hybrid jet/rocket engine, with an output of 390 kW and 18,000 kg respectively. The Hazel Custom retains the support actuator units and enhancement parts of the original Hazel, and can carry all the same equipment. A multi weapon latch can be plugged into its center skirt armor to support options like a sub arm unit or a flexible beam rifle unit, and another multipurpose latch is located above its cockpit hatch. While the Hazel Custom's High Mobility Form is identical to that of the original Hazel, its Assault Form is equipped with the same booster pod used by the RMS-117 Galbaldy β High Mobility Type, rather than the Hazel's usual movable booster pod. Two shield boosters are attached to this booster pod, and the mobile suit is also equipped with the Galbaldy β's extendable shield.

RX-121-1 Gundam TR-1 [Hazel Custom] w/Icarus Unit
The Icarus Unit is an equipment option for the RX-121-1 Gundam TR-1 [Hazel Custom] based on the concept of unassisted mobile suit flight under gravity. Lacking the ability to transform from mobile suit form to flight form like the NRX-044 Prototype Asshimar TR-3 Kehaar, this revolutionary system achieves flight through brute force, thanks to the high thrust produced by the powerful thermonuclear jet engines attached to its lower body and the thermonuclear rocket engines in its shoulders. The Icarus Unit's shoulder parts can swivel forward 90 degrees for storage inside the ORX-005 Gaplant TR-5 Hrairoo, and they have option latches for attaching weapons, shields, or sub arm units. The winglike devices in the shoulder parts function as attitude stabilizers during flight. The waist parts contain a supplemental generator similar to that used in the Hazel Custom's movable booster pod, albeit somewhat larger.

In the early stages of the aerial combat unit development project, the plan was to equip the Icarus Unit with aerodynamic wing units, achieving flight through a combination of thruster power and lift. However, in mobile suit form its aerodynamic characteristics were extremely poor, and it was determined that it would be unable to move freely in three dimensions. Thus the unit's specifications were changed to the current concept of achieving flight through high thrust.