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Strait_Hopper

Strait_Hopper

Member Since 03 Jan 2013
Offline Last Active Jan 31 2020 12:29 AM

In Topic: Over-under distance for turboprop v regional jet?

03 July 2017 - 12:51 AM

*Graphs*

 

 

Thanks for those graphs, conflictwithin, they offer great insight. Based on your analysis of both fuel burn and flights per stage length, is it also your conclusion that the E170 is not viable for any route under 1100nmi? Or do you have a different over/under distance?


In Topic: Over-under distance for turboprop v regional jet?

23 June 2017 - 06:27 AM

I've been doing a bit more work on this. In a separate thread, someone suggested the following formula as a good way of assessing the fuel efficiency of all aircraft: "Efficiency factor" = Aircraft speed / (Fuel flow / Max seats). So for a Q400, this would be 403/(4,391/78) = 7.16.

Using this formula, here's what I've got:

  • Q400NG - 10.60
  • Q400 - 7.16
  • CRJ900LR - 4.56
  • E175LR - 4.35

When you combine the much lower "efficiency factor" with the higher maintenance cost and higher cost per seat, it seems difficult to justify running a regional jet on any route lower than 1,100nmi. Even when you factor in the additional sectors you can fit onto a jet due to faster flight speed, a Q400 still seems to come out on top. Is this right??

I mean this from an AE perspective only - in the real world, passengers would be totally put off by the 1+ hour flight time difference and lower cruising altitude between a jet and a turboprop over this distance. In AE though, neither of these things is a factor
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In Topic: Over-under distance for turboprop v regional jet?

19 June 2017 - 12:28 AM

*deleted - duplicate*


In Topic: Over-under distance for turboprop v regional jet?

19 June 2017 - 12:27 AM

The Q400 is a fast prop so 500~600 is about right, you're doing fine.

Thanks for your thoughts. I agree that 500 - 600 miles seems about right - I'm wondering though whether anyone has a more precise way of calculating the cutover point from turboprop (Q400 or otherwise) to regional jet? What calculations or processes do you go through to maximise profit?

In my current scenario for example, where I use 550 miles as my cutover point: my e170s are averaging $50-60K daily profit, whereas my Q400s average $65-75K per day. Should I consider increasing the cutover distance?


In Topic: Australian airports

12 January 2017 - 02:58 AM

Hi,
 
Would be great to add Warrnambool Airport (Vic). It has recently started to be serviced by a RPT airline (Sharp Airlines - see: http://sharpairlines...m29Feb2016.pdf)
 

  • Airport Name: Warrnambool Airport
  • ICAO Code: YWBL
  • IATA Code : WMB
  • Passenger Numbers (Estimated figures are allowed): No official numbers published. Estimate of 12,000 per year (based on current RPT Metro 23 service (19 PAX) - 2 x services per day, 6 days a week)
  • Coordinates: 38°17′43″S 142°26′48″E
  • Runway length: 1,372m
  • Country: Australia
  • State/Region: Victoria

Sorry to be a shameless self-bumper, but just wondering if/when we might see WBL added? I haven't seen it pop up in any of the worlds I'm in yet...