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Flight Simulation

From Chile to Rothera, Antarctica, with the BAS Twin Otter and the FSX flight simulator

Aerial view of the Rothera research station in Antarctica.
Aerial view of the Rothera research station in Antarctica.

For this flight, you will need the Antarctica X flight simulation software made by Aerosoft.

The maintenance of BAS Twin Otters and their Dash-7 is done in Calgary, Canada, and head to Antarctica during the austral summer, between October and March. So if you want to try a flight simulation with a Twin Otter or a Dash-7 from Chile to Antarctica, pick one of those months as it is more realistic.

Since it would be a bit long to make all the virtual flights from Canada to Antarctica, I chose to do the last three legs to see what the landscape looks like.

A Twin Otter is normally approved for a maximum take-off weight of 12,500 pounds. But with skis weighing 800 pounds and additional fuel required to fly longer legs, BAS (British Antarctic Survey) has arranged to have their Twin Otters approved at 14,000 pounds. Even at this weight, the aircraft could still operate on one engine.

First, the aircraft departs La Florida airport (SCSE) in Chile, after a mandatory fuel stop before its next destination, the El Tepual de Puerto Montt airport (SCTE), also in Chile.

Airborne from La Florida, Chile, after refueling.
Airborne from La Florida, Chile, after refueling.

This virtual flight with the Twin Otter last about 4:25 hours (696 nm) with a heading of 185 degrees.

In flight towards El Tepual de Puerto Montt, Chile.
In flight towards El Tepual de Puerto Montt, Chile.

For the screen captures, FTX Global, FTX Vector and Pilot’s FS Global 2010 were installed. Orbx has also reworked the original El Tepual de Puerto Montt airport to include some people, aircrafts and new buildings. It makes for a more interesting destination.

Twin Otter on final approach for El Tepual de Puerto Montt, Chile.
Twin Otter on final approach for El Tepual de Puerto Montt, Chile.
Ready for refueling at the El Tepual de Puerto Montt, Chile.
Ready for refueling at the El Tepual de Puerto Montt, Chile.

The next flight is from the El Tepual de Puerto Montt airport (SCTE) to Punta Arenas (SCCI), both in Chile.

Twin Otter aircraft airborne and heading to Punta Arenas, Chile.
Twin Otter aircraft airborne and heading to Punta Arenas, Chile.

This flight, made low across the Andes, absolutely requires good weather. You will have to climb to 17,000 feet to make the direct route between the airports.

Twin Otter over the Andes climbing for17,000 feet
Twin Otter over the Andes climbing for17,000 feet

There are often spectacular views available to the virtual pilot. Yes, the BAS Twin Otter is flown by only one pilot, but there is always somebody else accompanying him.

Twin Otter aircraft approaching Punta Arenas, Chile.
Twin Otter aircraft approaching Punta Arenas, Chile.

Don’t forget to lean the mixture during the climb. Also use some additional oxygen (!!) if you don’t want to start singing and flying in circles after a while. Again, pay attention to the mixture during the descent, considering that you will be losing close to 17,000 feet.

Refueling at Punta Arenas, Chile.
Refueling at Punta Arenas, Chile.

The Punta Arenas airport, straight from FSX, is not an interesting airport to look at. It is a very bare airport, with just a single building and a VOR.

But since the BAS pilot do that mandatory leg just before heading to Antarctica, I chose not to change the route. The general direction for the flight to Punta Arenas was 164 degrees and the duration approximately 4:28 hours. You can obviously accelerate the process once the aircraft is established at its flying altitude.

The last flight is from Punta Arenas, Chile, to Rothera, Antarctica.

Twin Otter aircraft heading for the Rothera airport in Antarctica.
Twin Otter aircraft heading for the Rothera airport in Antarctica.

The Twin Otter will take between six and seven hours on an average heading of 162 degrees to cover the distance between Punta Arenas (SCCI) and Rothera (EGAR).

Over the snowy mountains of Chile towards Rothera, Antarctica
Over the snowy mountains of Chile towards Rothera, Antarctica
Carrying extra fuel on the flight towards Rothera, Antarctica.
Carrying extra fuel on the flight towards Rothera, Antarctica.

The runway at Rothera is made of gravel and is 2953 feet long. That is plenty for the Twin Otter and the DASH-7. Before you make the flight, go into the aerosoft/Antarctica X file in your flight simulator and click on the “LOD 8.5” option (the default is at LOD 4.5). It will give you much better details when you are approaching Antarctica.

The antarctic Rothera research station is in sight
The antarctic Rothera research station is in sight
Twin Otter aircraft on final at Rothera, Antarctica.
Twin Otter aircraft on final at Rothera, Antarctica.

The Airliner World magazine had an excellent article on the BAS operations in Antarctica in its March 2017 edition. It included plenty of interesting pictures and detailed explanations on what is expected from pilots and personnel working for BAS. I compared the Rothera virtual airport with the real one through the available pictures in Airliner World and was pleasantly surprised with the level of accuracy of the details.

A British Antarctic Survey Twin Otter aircraft is landing on the Rothera runway, Antarctica
A British Antarctic Survey Twin Otter aircraft is landing on the Rothera runway, Antarctica

The BAS always prepares itself for the worst: “[It] carries parts valued at around $5m, including a replacement engine for each aircraft, spare props and undercarriage components”.

Twin Otter aircraft after a landing on the Rothera runway, Antarctica
Twin Otter aircraft after a landing on the Rothera runway, Antarctica

A new development for the Air Unit has been its work with the RAF, using C-130 Hercules transports to airdrop supplies into the field. They fly from Punta Arenas and drop fuel to support our science programmes on the Ronne Ice Shelf. […] It is all part of their training system and the accuracy they drop to is very impressive. They might drop 250 drums, think how many Twin Otter trips that would have been for us (48 or more than 400 flying hours)”.

The main hangar in Rothera, Antarctica.
The main hangar in Rothera, Antarctica.

Aerosoft has made an excellent job in replicating the buildings in Rothera, BAS’s main research station in Antarctica. The biggest hangar can accommodate three Twin Otters and a Dash-7 altogether.

Inside the main hangar at the Rothera research station, Antarctica.
Inside the main hangar at the Rothera research station, Antarctica.

When your flight is over, do not forget to change the settings back to LOD 4.5 for Antarctica in your aerosoft/Antarctica X files.

For other standard virtual flights, click here:

Standard Virtual Flights

For more articles on flight simulation on my web site, click on the following link : Flight simulation