Curtiss-Wright CW-27 & CW-28

9 Pins
·
11mo
By
NZ Contractor magazine
a drawing of a yellow dump truck with four wheels on the front and two large tires on the back
The Curtiss-Wright CW-27 & CW-28
Curtiss-Wright also offered the bowl of the CW-28 motor scraper as a dedicated towed scraper called the CWT-8. It held eight cubic yards struck and 10 cubic yards heaped. It is not known how many of these that Curtiss-Wright built, but it cannot have been many as serial number records are only in place for two years (58-60).
two toy construction vehicles sitting on top of a white tile floor next to each other
The Curtiss-Wright CW-27 & CW-28
As mentioned, currently there are no models of any Curtiss-Wright earthmovers currently available in any scale. The model shown is a Wooldridge OS-400 cable scraper behind an M-R-S model 250 tractor unit. Wooldridge had been supplying M-R-S with scraper bowls, but when Curtiss-Wright took over the company, they terminated the agreement. This model is from my collection is 1:50 scale
an old truck is parked in the dirt
The Curtiss-Wright CW-27 & CW-28
Photographed during smoko break on the Auckland Motorway job in the early 1960s, this Curtiss-Wright CW-28 has had its Roto-Gear steering removed and replaced with a more conventional steering system using a couple of hydraulic cylinders, and some multiplier linkage a-la Caterpillar, making it far more reliable. This CW-28 is NZ Roadmakers fleet number 6
four yellow tractors are lined up on the side of a dirt road in front of trees
The Curtiss-Wright CW-27 & CW-28
An interesting and colorised photo of two T-70 Cobrettes, one push-loading the other with an additional track type tractor pushing at the rear. This is years before push-pull and twin-hitch loading, so Mack Wooldridge certainly had a few good ideas up his sleeve. The mufflers are also noteworthy, as most of the machinery at the time had straight unmuffled engine exhausts
an old tractor is parked in the grass next to a building and some other equipment
The Curtiss-Wright CW-27 & CW-28
The earthly remains of one of New Zealand Roadmakers’ Curtiss-Wright CW-28 motor scrapers, converted to a towed scraper by butchering off the tractor unit and adding a draw beam. The machine’s original saddle and final drive casings are still in place. The image taken at the yard of R.J.Marsh, Whitford, Auckland, 1982. Yes, that’s a Model C Tournacrane in the background!
there are two large trucks in the mud
The Curtiss-Wright CW-27 & CW-28
One of New Zealand Roadmakers’ Curtiss-Wright CW-28’s gets top-loaded with gravel by an International TD-6 track loader, while another unit waits to be loaded. Location Auckland, early 1960s.
a large yellow construction vehicle parked in front of a white background
The Curtiss-Wright CW-27 & CW-28
An illustration from the first brochure issued by Curtiss-Wright about its new scraper range. This is a CW-27, and at this point, Curtiss-Wright had not added sideboarding to the scrapers bowl turning it into a CW-28. The cab was an optional extra and the operator’s seat is rigidly mounted.
an old black and white photo of a tractor with the words corrette on it
The Curtiss-Wright CW-27 & CW-28
A Wooldridge factory image of a T-70 Cobrette that shows the ‘Roto-Gear’ steering motors clearly at the top of the machine’s articulation hitch. These were quite advanced for the day – a little too advanced, as they gave a lot of trouble in service. The front push-plate for push-loading other scrapers is also well-shown and a concept some 20 years ahead of the idea being adopted by other manufacturers.
a large yellow construction vehicle sitting on top of a field
Curtiss-Wright CW-27& CW-28
A colorised image of one of the first production Wooldridge T-70 “Cobrette” motor scrapers. Curtiss-Wright took over the entire Wooldridge range in June 1958 and set about renaming all the former Wooldridge products, thus the T-70 became the CW-27, a nod to the seven cubic yard struck rating of the machine