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GrimRacer Accessories

UL-1 Superior

The racing RTR with all the extras — and no equals!

UL-1 Superior 65+ mph!There's never been a LiPo-ready hydro with brushless power and 2.4GHz technology — until now. The UL-1 Superior has been designed in the U.S.A. to deliver today's best in cutting-edge control, brushless performance and competition-quality features!

  • Features high-performance GrimRacer hardware and an optimized-for-brushless hull design developed by Mike "Grimracer" Zaborowski!
  • Includes a brushless marine motor and ESC custom-designed to meet UL-1 performance requirements.
  • Drive system uses a standard 0.150" flex drive and 3/16" prop shaft to provide race-quality response and reliability.
  • Ideal for IMPBA and NAMBA FE Sport Hydroplane Class events.

Available in four hot hull colors!

Hull Length: 27.0 in (685 mm)
Beam: 14.25 in (360 mm)
Weight: 4.9 lb (2.21 kg)
Requires: (2) 7.4V, 3200mAh 20C LiPo battery packs & (4) "AA" batteries

AQUB20YY - Yellow
AQUB20RR - Red
AQUB20NN - Orange
AQUB20WW - White

Features Parts Gallery Wallpaper Download a Product Flier Download the product manual 360 view

2.4GHz Tactic™ Radio System

The 2.4GHz system in the UL-1 is hard to beat for convenience and control. 2.4GHz tech makes it virtually interference-free and supremely dependable and onboard gear is factory-installed for time-saving ease.

2.4GHz Tactic Radio

Water-cooled, 36-56-2030kV Brushless Marine Motor

The 6-pole, 36-56-2030kV brushless motor is an AquaCraft design created exclusively for the UL-1 and high-speed hauling. Includes gold-plated, 4 mm motor plugs to boost efficiency.

Brushless Marine Motor

Waterproof, Water-cooled 60A ESC

Inside its aluminum case, the UL-1 ESC is waterproof, water-cooled and capable of handling 60A current loads with ease. While compatible with NiCds and NiMHs, it offers two safety features tailored just for LiPo packs: a "stutter bump" warning at 12V and automatic cut-off at 11.6V.


Recommended Hop-up Prop


Stock Number: AQUB9760

Give your UL-1 a burst of's as simple as bolting on a high-quality GrimRacer metal prop! Racer-designed, USA-made GrimRacer Copper-Beryllium-Titanium props are now available almost everywhere R/C marine products are sold - making it easier than ever to get the metal prop advantage.

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