The CIX VFR Club CFI's Challenge - Fuel Calculations
CFI's Challenge - Fuel Calculations
Home > Monthly Events > October - CFI's Challenge - Fuel Calculations
Briefing October 2025
Overview

What is your approach to fuel?
Do you: -

  1. Just "Top up" your fuel to 100% and go flying, or
  2. Calculate how much fuel you need, and add the "Contingency reserve" and put that in the tank before you go flying?

Scenario

This challenge is to calculate the fuel you will need, and post that amount on the forum.
Fly the route, checking the fuel in your tank as you set off, and after landing. Then post the amount used, and the difference from that calculated: -

  1. how close to the "minimum reserve" did you have on parking?
  2. what was the difference between calculated and actual fuel consumption

Start Time and Place

Any time in October 2025, fly together or go solo.

Flight Planning

Calculate the block fuel requirement according to this table using the Pilots Operating Handbook for your aircraft.

Fuel Component Description
TaxiFuel used to taxi to the runway
TripFuel used for take-off, Landing, and to get from A to B
Contingency5% of Trip Fuel
Alternate Fuel to get from the destination to the Alternate Aerodrome
Final Reserve 30 minutes of Fuel Burn during the daytime | 45 minutes at night
ExtraAny discretionary Fuel you may require
Block Fuel = Taxi + Trip + Contingency + Alternate + Final Reserve + Extra

This is the route.:
WaypointLatitudeLongitudeNotes
EGNC - CarlisleStart
VRP Carlisle/Penrith54 39 31.21 N 2 24 00.60 W Waypoint 1
VRP Isle of Man/Laxley54 13 27.01 N 2 24 03.60 W Waypoint 2
EGNS - Ronaldsway Isle of Man54 39 31.21 N 2 24 00.60 W Destination
The route deliberately overflies the "Lake District" so you will have to allow for climbing to a suitable height for safe ground clearance.
Don't forget to check weight and balance. See the E6B resource in charts and notes below for support with this.
What Aircraft can I fly

Any aircraft in the GA category including helicopters and light twins.

Weather or not?

Before starting, check the weather. In accordance with VATSIM rules the wind direction should be the same as real-world. This event is strictly VFR, so all other aspects of the weather should be adjusted to avoid the disappointment of being rained or fogged in.

Airmanship

This event should be fun for all, both pilots and controllers. If your enjoyment is impaired by "unsportsmanlike" ATC, let someone know so senior club members can pass on your concerns.
If you get something wrong, such as entering controlled airspace without authority, learn from the experience and follow instructions - even if requested to 'disconnect'.
Don't forget it is better to ask a club member or ATC when unsure rather than flying on causing confusion and mayhem!

ATC

Always be alert for live ATC when you are flying. If flying without air traffic control remember to announce your intentions on Unicom

Radio Discipline

Take care not to let our TeamSpeak Chat cut across ATC. Stop any conversation immediately the R/T comes alive, and then continue if "he wasn't talking to us". This is difficult because when talking on TeamSpeak you cannot hear the R/T. So be aware that ATC might be trying to contact a member. If anyone hears R/T which appears to be ignored and it is a club member being called, on TS, say "ATC is calling XXXX/one of us". Then everyone stop talking until ATC calls again and makes contact. Remember that if ATC tells you "stand bye" It means "Wait, don't call me, I will come back to you as soon as I can.".

Club Star Award

Half a star is awarded for departing Carlisle (EGNC), the other half for a landing at Ronaldsway Isle of Man (EGNS) sometime in October 2025. .

Charts and Notes

E6B utility: https://e6bx.com/ | Carlisle data sheet | Ronaldsway data sheet

Acknowledgements

Event Idea: Max Symons | Event Planning: Max Symons | Event Briefing: Colin Parker

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