DGH 0 Posted March 24, 2021 Share Posted March 24, 2021 Hi Wondering ... I see in the manual it is 250 / 290 / M0.74 However in the cockpit I see 250 / 320 / M0.77 ( think its below the warning lights .. not sure how to call it ) Also in Simbrief I can select both options when setting up a plan. So what is the correct one ? or if both can be used .. under what circumstances ? Link to comment Share on other sites More sharing options...
niklaskull 3 Posted March 25, 2021 Share Posted March 25, 2021 I use 250/290/.74. Works fine. Cant say which is "right and wrong" though. Sorry. Link to comment Share on other sites More sharing options...
JRBarrett 675 Posted March 25, 2021 Share Posted March 25, 2021 There is no “correct” profile, it depends on individual operator SOPs. One r/w CRJ pilot on the test team works for an airline which climbs at 250 knots IAS to cruise altitude until intercepting Mach 0.74. This gives a faster climb rate but lower ground speed. Other operators go to 290 knots IAS passing 10,000 feet, (or even 300 to 320 knots), which gives lower climb rate and more fuel consumption, but gets the aircraft farther along its route to destination more quickly. Climb above 10,000 feet should always be done at least at 250 knots. Trying to use a lower speed than that will eventually put the aircraft in a high AOA, high drag, low lift situation at higher altitudes. The cruise speed will also vary by operator. The CRJ-200, which has less power than the 700/900, is typically cruised at Mach 0.74. The 700/900 can cruise up to Mach 0.80 in normal operations - the exact value will depend on distance to destination vs. available fuel, winds aloft, or operator SOP. If the aircraft is on time, and/or has a tailwind, the pilots may choose a lower cruise speed for fuel savings. If it is behind schedule and/or has a headwind, they may choose a higher cruise speed. Link to comment Share on other sites More sharing options...
DGH 0 Posted March 25, 2021 Author Share Posted March 25, 2021 Thanks for the response. Was not sure if there was a default profile to use. Again thanks for the response and time. one more thing ... would be nice if i could get a notification or a message when i had a response on the forum. Not sure if that can be implemented. now i basically did see by coincidence that i have a response. stay safe Link to comment Share on other sites More sharing options...
Deputy Sheriffs Herman 1591 Posted March 25, 2021 Deputy Sheriffs Share Posted March 25, 2021 Because we believe this topic has been answered we have closed it. If you have any more questions feel free to open a new topic. Link to comment Share on other sites More sharing options...
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