IFR Navigation 5 - PNR and ETP

PNR is:

• The point after which the aircraft does not have enough fuel to continue to the destination aerodrome

• The point after which the aircraft does not have enough fuel to return to the departure aerodrome

• The point at which it will take the same amount of time to continue to the destination as it would to return to the departure aerodrome

An aircraft has a safe endurance of 3hours 20mins and flies a TAS of 180kts, with a wind component of +15kts, how many minutes into the flight is the PNR?

Answer to the nearest minute

An aircraft is flying a 487knots TAS burning 7100 litres per hour, if the aircraft is carrying 60,000 litres + reserves and flying into a 40 knot headwind, how many minutes into the flight is the PNR?

Answer to the nearest minute

An aircraft is flying from Christchurch to the Chatham Islands, the total distance is 413nm and the journey will take 3hours 30minutes at a TAS of 130kts. The aircraft is carrying 200L of fuel + reserves and is burning 56L of fuel an hour.

The PNR is _____nm into the flight (answer to the nearest nm)

You plan a day trip from NZCH to NZWS (Westport) in your Texan. It has a TAS of 315kt and a fuel consumption of 30GHP. You load on 110 gallons and check your flight plan which states a total ditance of 132nm and a tailwind of 18kt from NZWS to NZCH. What is PNR and ETP distance?

• PNR = 500nm ETP = 70nm

• PNR = 50nm ETP = 70nm

• PNR = 70nm ETP = 50nm

• PNR = 700nm ETP = 500nm

You fly from NZCH to NZWN (Wellington) which is a total distance of 242nm. TAS is 120kt.

Wind from NZCH to ETP is +10kt

Wind from ETP to NZWN is +15kt

What is the ETP time and distance from NZWN?

• 134nm 60 minutes

• 108nm 49 minutes

• 94nm 43 minutes

• 162nm 72 minutes

Tags

CCSS.HSG.SRT.C.8

NZCH to NZTL (Tekapo)

Total distance: 157nm

TAS: 150kt

Wind from NZCH to ETP: -10kt

Wind from ETP to NZTL: -5kt

What is ETP time?

• 0.59 hours

• 0.77 hours

• 0.42 hours

• 1.22 hours

You are flying from Auckland to Rarotonga, 1627nm, your aircraft has a safe endurance of 6hours 10mins flying at a TAS of 290kts. The wind component to the ETP is -12 and +24 after the ETP. How many minutes into the flight is the ETP?

Answer to the nearest minute

You are flying Timaru to Wellington, total distance of 230nm, your groundspeed to the ETP is 110kts and onwards from the ETP is 130 kts. Your aircraft's TAS is 100kts

The ETP is _____nm into the flight