Wow, the Q is fast
09-24-2020, 07:51 PM
#1
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Joined APC: Aug 2015
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Wow, the Q is fast
The other day we were doing an SFO-RDM leg in the Can't Really Jet, up at FL310. Around RBL I noticed traffic at our 3 o'clock, down around FL240. Soon I realized he was paralleling our course exactly, and matching our speed. Then we figured out (since we were both on the same frequency) that the traffic was one of your Q400s, also going into RDM.
For a good 100 miles that Q stayed right with us, even at M.74. I had no idea that bird could hustle so fast! Only when we pushed it up to .79 in the descent did we pull ahead. What do you guys usually cruise at?
For a good 100 miles that Q stayed right with us, even at M.74. I had no idea that bird could hustle so fast! Only when we pushed it up to .79 in the descent did we pull ahead. What do you guys usually cruise at?
09-25-2020, 06:46 AM
#2
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Posts: 268
We usually get our highest true airspeed at FL180-190, where you'll see 350 KTAS. The true airspeed at FL240 is a bit lower, but this altitude results in a good compromise between speed and fuel burn. The "Mach calculator" on the FMS usually displays a laughable number, like 0.58. We don't ever use this, and I suspect many pilots wouldn't be able to find it on the FMS.
Just for rough "back of the envelope" style fuel burn calculations, I figure on 2400 pounds per hour (total) or about 200 pounds per five minutes. This is for revenue flights. Our "low-speed cruise" for long reposition flights can be as low as 1400 pounds per hour. Fancy a six-hour flight on the Dash? We have enough gas!
Is the E175 doing Redmond - Los Angeles? We used to fly this in the Q. It was one of our longer flights, at around 2.6 hours.
Just for rough "back of the envelope" style fuel burn calculations, I figure on 2400 pounds per hour (total) or about 200 pounds per five minutes. This is for revenue flights. Our "low-speed cruise" for long reposition flights can be as low as 1400 pounds per hour. Fancy a six-hour flight on the Dash? We have enough gas!
Is the E175 doing Redmond - Los Angeles? We used to fly this in the Q. It was one of our longer flights, at around 2.6 hours.
09-25-2020, 06:50 AM
#3
All is fine at .79
Joined APC: Sep 2016
Position: Paahlot
Posts: 4,083
25,000 ft..............................248 kias Vmo
240 kts at FL250 is M.581 with a TAS of 350 give or take.Your CRJ was doing M.74 with an IAS of 270-275 and a TAS of almost 440.
Difference being tailwinds.
Last edited by TiredSoul; 09-25-2020 at 07:19 AM.
09-25-2020, 02:41 PM
#5
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Originally Posted by hydrostream
One of our Qs from California to Redmond? I don’t believe you, LoL
Horizon stopped doing Redmond - LA after two or three years. I don't think there was direct air service from Redmond to LA for eight or ten years, but someone started it back up a couple of years ago.
Edit: Horizon is now doing RDM - LAX in the E175. Block time is listed as 2.3 hours.
09-25-2020, 06:32 PM
#9
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Originally Posted by TiredSoul
25,000 ft..............................248 kias Vmo
240 kts at FL250 is M.581 with a TAS of 350 give or take.Your CRJ was doing M.74 with an IAS of 270-275 and a TAS of almost 440.
Difference being tailwinds.
Stronger headwind at FL310 than FL240 going SFO to RDM.
09-25-2020, 07:21 PM
#10
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Posts: 268
Originally Posted by hydrostream
The Q must have been subbing for the jet then.
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