Bristows Super Puma Range
Join Date: Mar 2004
Location: Truro
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Obviously dependent on winds/load etc in the original 332L we could flog from Aberdeen to the Thistle with a diversion to Bergen or Floro. That's 274nm there, and then 125 or 95 for the diversion. Straight to Thistle with an offshore diversion was common. Altitude made a large difference to range. At FL90 the fuel consumption could drop from 1050/1100 Lbs per hour to 900/950 or less; ally that to a favourable Southerly and you could be there quite quickly. .
As they say in a supermarket near you, 'Every little helps.'
Presumably things have changed.
As they say in a supermarket near you, 'Every little helps.'
Presumably things have changed.
Last edited by Bootneck; 1st May 2008 at 12:57.
Join Date: Aug 2003
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Simplistically it would be as follows:
Max normal fuel load at take off 1930kg
Fuel Burn 475kg/hr
VFR reserves = 30 mins at 475 kg/hr = 230 kg
Cruise speed 125 KTS
1930-230 = 1700
1700/475 = 3.57 hours x 125 KTS = 446 nm
Inter requires an additional 0.5 hour holding fuel at holding speed and fuel flow (roughly 350kg/hr) Tempo requires 1 hour at holding speed fuel.
Inter it would equal approx 1930-230-175 = 1525/475x125 Kts = 401 nm
Tempo would equal approx 1930-230-350 = 1350/475x125 Kts = 355 nm
Above distances may have to include an alternate so may not be divisible by two to get an offshore out and back range range.
Some Bristow Super Pumas have sponson tanks which increases the usable fuel load by around 400kg but when departing with 2350kg of fuel, payloads are invariably < 350 kgs.
These numbers are approximate, it has been 25 years since I last flew them, they were all quite new then. Bristow first got them in 1982 so they are all old girls now!
Max normal fuel load at take off 1930kg
Fuel Burn 475kg/hr
VFR reserves = 30 mins at 475 kg/hr = 230 kg
Cruise speed 125 KTS
1930-230 = 1700
1700/475 = 3.57 hours x 125 KTS = 446 nm
Inter requires an additional 0.5 hour holding fuel at holding speed and fuel flow (roughly 350kg/hr) Tempo requires 1 hour at holding speed fuel.
Inter it would equal approx 1930-230-175 = 1525/475x125 Kts = 401 nm
Tempo would equal approx 1930-230-350 = 1350/475x125 Kts = 355 nm
Above distances may have to include an alternate so may not be divisible by two to get an offshore out and back range range.
Some Bristow Super Pumas have sponson tanks which increases the usable fuel load by around 400kg but when departing with 2350kg of fuel, payloads are invariably < 350 kgs.
These numbers are approximate, it has been 25 years since I last flew them, they were all quite new then. Bristow first got them in 1982 so they are all old girls now!
