Boomerang takes its name from the first model released for sale using this chassis:
– The Boomerang model number 58055 put on sale in 1986 and available on the market until 1991
– Super Sabre, model number 58066 put on sale in 1987 and available on the market until 1992
These two models represent a very important novelty for Tamiya, there are several advertisements that Tamiya or the various importers around the world have published in trade magazines; in the image below are examples of advertisements involving The Boomerang and Super Sabre.
The Boomerang chassis is the first evolution of the Hot Shot chassis that maintains the main settings of this four-wheel drive, two differential and two-wheel steer off-roader unchanged. Boomerang is the evolution of Hot Shot II model number 58062, the parts in common between the two chassis are:
– the front and rear gears. The gears with the two differentials front – rear (code number 9005167), the two plastic shells that form the gearbox (part G code number 0005118), the four axle joints (code number 2594013 and 2504029 for the gearbox, code number 2594012 and 2594014 for the hubs), the two main drive axle joints from front – rear gearbox (code number 2504020) are the same,
– the independent four-wheel double wishbone suspension (part F part number 0005119),
– the front C.V.A. single shock absorber system in common Hot Shot II with stabiliser bar. The stabiliser bar is different from that of Hot Shot II,
– the rear C.V.A. double shock absorber in common with Shot II,
– the front steering system (spindles code number 0445098, drop plates code number 4305121)
– the system for locking the motor to the rear differential housing with the 4 metal slats (code number 4305124)
Several pictures appear in the Guide Books published by Tamiya.
These are the fact sheets with the main features of these two models.
The Boomerang chassis attempts to solve the biggest problem of the Hot Shot chassis: access to the electronics.
Boomerang is equipped with a new central open-tank chassis that facilitates access to the components. Pictured on the right is the Boomerang chassis and on the left the Hot Shot II chassis made up of two plastic shells joined together by a dozen screws. The Hot Shot II model number 58062 is equipped with a double-shell chassis modified with respect to the Hot Shot model number 58047 and Super Hot model number 580545, the upper shell houses a metal window that allows quicker access to the receiver. The new solution is certainly less rigid, but does not change the driving feel of the chassis, which guarantees excellent performance.
The major differences between the Hot shot II model number 58062 (right in the pictures) and the Boomerang chassis (left in the pictures) are:
– a different roll bar. In the Boomerang chassis the roll bar is very small in size and mainly protects the rear differential housing. In the Hot Shot II the roll bar protects the entire top and rear
– speed control is mechanical, but it is a completely different system
– the front anti-roll bar
-a completely different steering arm system, Boomerang has a system that limits the entry of dust inside the chassis shell
– the front bumper of the Boomerang retains its T-shaped geometry and perfectly shields the front wheels from frontal impacts, but changes its shape
– the battery holder system retains its geometry, but changes its shape
Differences between The Boomerang and Super Sabre models:
– there are three shock absorbers, one at the front and two at the rear for all models equipped with the Boomerang chassis. The shock absorbers change colour from yellow for The Boomerang to red for Super Sabre. The shock absorbers of The Boomerang are one of the short type at the front and two of the long type at the rear, while the rear shock absorbers of the Super Sabre are the same as the front one, which is the same as for The Boomerang in the Short version. The difference is dictated by the body shape of the Super Sabre, which has a very low rear wing. For this reason the plate that supports the rear shock absorbers changes in shape and size (highlighted in blue is the plate of The Boomerang and in red the plate of the Super Sabre)
– The Boomerang has the driver and a small roll bar, while Super Sabre has a Lexan cover that protects the open part of the chassis shell. This solution is retained for both The Boomerang and Super Sabre chassis re-releases.
Starting in 2008 and up to the present day (2024) there have been several re-releases for the Boomerang frame:
– The Boomerang model number 58418 put on sale in 2008 and available on the market until 2011, with the same numbering it was also put on sale between 2017 and 2018
– Super Sabre, model number 58728 put on sale in 2023 and available on the market until 2024
For the re-releases, the Lexan cover is always present in the package, which closes the lower shell of the chassis preventing debris, dust, dirt, sand …coming into contact with electronics. For The Boomerang model number 58418 you must first remove the roll bar (highlighted in red) complete with driver (highlighted in orange) and then install the protective cover (highlighted in blue).