9/18/2023 0 Comments Mini mog truckįor the sedan, when the windows were down, the efficiency was reduced by 20 percent, while the SUV fuel efficiency was reduced just 8 percent. Overall, both studies showed that driving with the windows down has a significant negative effect on the fuel efficiency - more than using the vehicle's air conditioner. Two vehicles were used in the test, one was a full-size SUV with an 8.1-liter V-8 engine and the other was a full-size sedan equipped with a 4.6-liter V-8 engine. In the desert, temperatures and vehicle speed were factored into the study. In the wind tunnel, air was forced over the front of the car and also from an angle on the front of the car to simulate a cross wind. So, does drag really affect a car's fuel economy more than air conditioning? There are times when using the AC will save you gas.īack in 2004, the Society of Automotive Engineers (SAE) conducted a study at a General Motors wind tunnel and on a desert track. Unlike the parachute, you definitely don't want a lot of drag on your car because it makes your engine work harder to get your vehicle up to the same speed. When a skydiver opens up the parachute, it cups the air and causes a massive amount of drag, enough to slow the speed of the skydiver and allow him or her to land safely on the ground. You can think of it a bit like a parachute. However, when a vehicle has its windows down, air passes into the car where it was formerly allowed to flow over it, causing resistance that didn't exist when the windows were up. Most modern cars are designed to be relatively aerodynamic, which allows them to pass through the air with minimal resistance. Drag is the resistance that cars, and all moving objects, encounter when moving through the air at any speed. The second is what is known as air resistance or drag. The first deals with how the air compressor in your car works and how much extra fuel the engine has to use to keep it running. “They can have a Mog, but it comes with a driver,” he grins.There are two main factors to consider when approaching this question. People call Jim wanting to hire one of his Mogs, but that’s not what his business is about. Jim’s actual job is running Australian Unimog Expeditions, which specialises in moving people and equipment to difficult to reach locations. “We pay him with a slab of cans,” chuckles Merc’s Philip Leslie, who’s happy to let Jim do his job for him. He’s an enthusiastic customer, but amounts to a salesman. JIM CURTIN has been a Unimog man since 2007, though confesses to “40-odd years of outback and desert experience,” starting with an OKA 4WD. Like the big Mog, U500 has working gears and an additional switch alongside the mule-and-hare switch, marked with a tortoise brings even lower crawler gears than offer a glacial 0.13km/h minimum speed.Ī handy feature is its ability to swap from left- to right-hand drive by swinging the entire steering wheel and pedal assembly from one side of the cabin to the other, to give the driver the best view possible of the hydraulic and rotary tools that can be attached. Turbo-diesel engines endow the full-time-4wd ute with more than 650Nm, while Mog trademark features such as helical springs, portal gears and diff locks – standard at the rear and optional at the front – mean its ability to tame terrain is limited only by its smaller tyres and smaller ground clearance and access angles in comparison with its bigger brother. MERCEDES’ other Unimog line in Oz – the U400 and 500 – is designed with a focus on civil rather than agricultural or military duty, and isn’t as wide as its bigger brother, though there’s little in it for height or length. It’s an endearing, friendly giant, and there’s little else on earth that can go where it goes, or do what it does. Its gearing might otherwise see it maxxed-out at around 130km/h, but at that speed the brick-shaped Benz’s thirst for diesel would be frightening.īut the Unimog is not to be feared. Tyres cost $1600 each, but can last up to 60,000km, and fuel consumption ranges from 22L/100km at an 80km/h cruise, to 29L/100km at 100km/h, which is the Mog’s limited top speed. “Just filters and oil – there’s plenty of ’em.” You need a medium rigid truck licence to drive it on the road, and trained technicians in Brisbane and Melbourne take care of servicing, which, according to Jim, is surprisingly straightforward.
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