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Fuel economy Gurus


DeepDrummer

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I wish I could have picked these guys brains. Read the last paragraph after the first picture.

 

https://www.ozatwar.com/ozatwar/lindbergh.htm

 

No doubt John S. Blyth would have had a goldmine of information regarding fuel economy as well.

 

http://www.americanairmuseum.com/person/128412

 

He states in the video below that he climbed to 40,000 feet to get to Berlin and back.

 

 

Between those two links and some creative guessing, I would have to conclude that High altitude, high boost and low rpm could in fact give the best fuel economy in real life although hard on the engine to an extent.

Whether it works that way in DCS is yet to be determined.

Win 10 pro 64 bit. Intel i7 4790 4 Ghz running at 4.6. Asus z97 pro wifi main board, 32 gig 2400 ddr3 gold ram, 50 inch 4K UHD and HDR TV for monitor. H80 cpu cooler. 8 other cooling fans in full tower server case. Soundblaster ZX sound card. EVGA 1080 TI FTW3. TM Hotas Wartog. TM T.16000M MFG Crosswinds Pedals. Trackir 5.

"Everyone should fly a Spitfire at least once" John S. Blyth

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Blyth was flying a PR Mk.XI, an aircraft of considerably greater fuel capacity than a Mk.IX. On top of the 85 in the main tanks it had 66.5 gallons in each wing leading edge for a total of 218 gallons, with the abilty to carry the same drop tanks as the fighter variant (plus a special 170 gal one used only by the PR force apparently).

 

The Rule of Thumb you present is correct. If you take the Quick Reference Guide I just produced (here) and do the IAS-TAS math for a setting of 2200 RPM @ 0lb Boost:

 

10,000ft: 258mph TAS (215 IAS)

17,000ft: 281mph TAS (210 IAS)

25,000ft: 292mph TAS (195 IAS)

 

So for the exact same power setting and for a fuel consumption of 51 gallons per hour you can travel faster and therefore further simply by gaining altitude.


Edited by DD_Fenrir
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Blyth was flying a PR Mk.XI, an aircraft of considerably greater fuel capacity than a Mk.IX. On top of the 85 in the main tanks it had 66.5 gallons in each wing leading edge for a total of 218 gallons, with the abilty to carry the same drop tanks as the fighter variant (plus a special 170 gal one used only by the PR force apparently).

 

The Rule of Thumb you present is correct. If you take the Quick Reference Guide I just produced (here) and do the IAS-TAS math for a setting of 2200 RPM ' 0lb Boost:

 

10,000ft: 258mph TAS (215 IAS)

17,000ft: 281mph TAS (210 IAS)

10,000ft: 292mph TAS (195 IAS)

 

So for the exact same power setting and for a fuel consumption of 51 gallons per hour you can travel faster and therefore further simply by gaining altitude.

 

Perfect. Thanks for the info.

Win 10 pro 64 bit. Intel i7 4790 4 Ghz running at 4.6. Asus z97 pro wifi main board, 32 gig 2400 ddr3 gold ram, 50 inch 4K UHD and HDR TV for monitor. H80 cpu cooler. 8 other cooling fans in full tower server case. Soundblaster ZX sound card. EVGA 1080 TI FTW3. TM Hotas Wartog. TM T.16000M MFG Crosswinds Pedals. Trackir 5.

"Everyone should fly a Spitfire at least once" John S. Blyth

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As I am flying along here heading to the target, I am climbing at your 12 boost and 2850 rpm. Nice! I was still stuck in the 9 boost mind set since it used to run too hot otherwise. This is a whole new plane. All systems are perfect. This is going to be fun. Thanks for the push.

Win 10 pro 64 bit. Intel i7 4790 4 Ghz running at 4.6. Asus z97 pro wifi main board, 32 gig 2400 ddr3 gold ram, 50 inch 4K UHD and HDR TV for monitor. H80 cpu cooler. 8 other cooling fans in full tower server case. Soundblaster ZX sound card. EVGA 1080 TI FTW3. TM Hotas Wartog. TM T.16000M MFG Crosswinds Pedals. Trackir 5.

"Everyone should fly a Spitfire at least once" John S. Blyth

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5 min at full everything is quite amazing as well.

Win 10 pro 64 bit. Intel i7 4790 4 Ghz running at 4.6. Asus z97 pro wifi main board, 32 gig 2400 ddr3 gold ram, 50 inch 4K UHD and HDR TV for monitor. H80 cpu cooler. 8 other cooling fans in full tower server case. Soundblaster ZX sound card. EVGA 1080 TI FTW3. TM Hotas Wartog. TM T.16000M MFG Crosswinds Pedals. Trackir 5.

"Everyone should fly a Spitfire at least once" John S. Blyth

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