Jump to content

Damm shes a thirsty girl........


pawea

Recommended Posts

Loving the Harrier been training in her this last week but dammmmm she likes a wee drink lol fully loaded if i'm lucky i get about 30 mins flying max before reaching bingo fuel and thats with gentle throttle control....if i decide to do a bit of dogfighting or try to exceed 450knots ? better get that parachute ready of prepare for a ditching......just wondering if this is accurate as on paper the harrier should have a 300nm combat range.......especially as its supposed to be a close air support fighter you'd expect a wee bit longer loiter time

Link to comment
Share on other sites

If you stay low and gun the throttle of course you're gonna burn fuel. 300lbs/min + to be exact.

However, if you climb a bit and set a 150ppm fuel flow, it's much less thirsty and you still get a decent turn of speed, all the while having a round number to do the maths with.

Link to comment
Share on other sites

... just wondering if this is accurate as on paper the harrier should have a 300nm combat range.......especially as its supposed to be a close air support fighter you'd expect a wee bit longer loiter time

Seems to be pretty accurate - typical GR.3 mission times in the Falklands conflict seem to have been ~50 min without external tanks and perhaps 1h 20 min with.

 

http://www.radarmalvinas.com.ar/relatos/diario%20squire%20traba.pdf

 

BINGO = Fuel state at which the flight must proceed along an established routing under a maximum range profile; the climb altitude depends on the required range and is followed by a low power/optimum range descent. IRL altitudes are usually determined by ATC zoning, rather than the optimum range profile.

 

From the AV-8B Day performance charts 20 nm = 5000 ft, 90 nm = 30000 ft, 180 nm = 40000 ft and RTB cruise fuel flows are ~40 lb/min +/- 5lb

 

A useful rule of thumb for planning is 100 lb / 10 nm, so 800 lb = 80 nm range to RTB.

 

Example 2. TAV-8B FAM flight to the R5306A (60nm furthest point) with 1x Hi-Tacan then tower downwind for landings.

1200# at straight-in initial.

+ 600# for 60nm, 6.5 AOA transit at highest VFR altitude, normal descent profile.

=1800# Bingo

1600# at pad for one last VTO accel to return

+ 200# re-position / cool down / run-ups

+ 800# decel VL

+ 600# roll-n-go

+ 800# hi Tacan

=4000# Joker (The fuel state, above Bingo, at which separation / bug-out / event termination should begin)

+ 500# for 5min remaining to complete Training Objectives at expected average fuel flow.

=4500# Tiger (Enough fuel to enable the flight to fight)

 

AFAIK a regular (60 fixed nozzle) landing should take ~700 lb, a vertical landing ~800 lb and there should be approx. 500 lb reserve after touch down (500 lb / 100 lb/min = 5 min margin).

 

http://jyito.com/Master_FSG.pdf


Edited by Ramsay

i9 9900K @4.7GHz, 64GB DDR4, RTX4070 12GB, 1+2TB NVMe, 6+4TB HD, 4+1TB SSD, Winwing Orion 2 F-15EX Throttle + F-16EX Stick, TPR Pedals, TIR5, Win 10 Pro x64, 1920X1080

Link to comment
Share on other sites

http://www.filefactory.com/file/njg7wh7868d/A1-AV8BB-NFM-400.pdf

 

Here are the actual performance charts, what you're looking for with fuel usage, are the tables for things like the optimum cruise Mach no.

 

There are 'computer' tables where you can feed them numbers to obtain those figures.

NATO - BF callsign: BLACKRAIN

2x X5675 hexacore CPUs for 24 cores | 72GB DDR3 ECC RAM 3 channel | GTX 1050Ti | 500GB SSD on PCIe lane | CH Products HOTAS | TrackIR5 | Win 7 64

Link to comment
Share on other sites

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...