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JRBarrett

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JRBarrett last won the day on June 15 2021

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  1. The number 3 hydraulic pump is above the landing gear bay. It is started before brake release on pushback and runs continuously until the aircraft is parked at the gate after landing.
  2. There is an available Rockwell Collins STC that can add LPV capability to the CRJ. It requires upgrading both GPS receivers (and antennas) plus mods to the FMS and autopilot. I work for a corporate operator with 3 CRJ-200s, and all three of of our aircraft have the LPV mod. I don’t think many airline CRJs have been equipped with LPV. It is quite expensive, involves about two weeks downtime to install, and brings additional training requirements for flight crews.
  3. The CRJ has a COM3 radio, which might be the source of the non-stop ATIS. Their is no control panel for COM3 on the center console. You access it via the FMS radio menu (page 2).
  4. It appears that is EGPWS terrain showing on the pilot’s nav display, not weather radar. They may be using their own terrain database, rather than extracting it from the sim.
  5. The excessive turning after a course change in the current version is by no means a “given”. Most of the time it works well. But, there are times it does not capture decisively. The worst case scenario seems to be when there is a substantial course change at high altitude and airspeed, with a strong crosswind coming from the outside of the turn, as this tends to push the aircraft away from the new track as it is trying to capture. Any changes to be made in this area will be thoroughly tested before being released.
  6. The developers are definitely aware of this problem, and a new system for intercepting the outbound leg when the course changes at a waypoint is being implemented, based on how the real CRJ autopilot operates. The initial part of a course change generally works exactly as it would in the real CRJ. The problem (at present) is with the last part of the course change. The actual autopilot is limited to two fixed bank angles when turning under autopilot control - either 25 or 12.5 degrees. (The sim uses 30 and 15 degrees). Above 31,600 feet, the only available bank angle is 12.5 degrees. For this reason, the real CRJ will use a longer DTA (turn anticipation distance) than other types of airliners with a more sophisticated autopilot that can dynamically vary the bank angle in a turn. When the autopilot is in half bank mode, the real CRJ will use a DTA of up to 11 miles prior to the waypoint if the course change is significant. The calculation of turn anticipation is based on the airspeed, the available bank angle, and the amount of heading change required. With a bank angle of 12.5 degrees at high altitude, even a DTA of 11 miles may not be enough with a significant tailwind, and the real aircraft can overshoot the new course line in this scenario. The main issue with the sim version at present is not overshoot but undershoot - i.e. the aircraft completes the turn before arriving at the new course, and then makes a series of “cut and try” banks to work its way onto the new course. The actual autopilot switches from constant bank mode to FMS CDI tracking during the final part of an LNAV turn. If the aircraft has not yet arrived at the new course, the aircraft will roll level, and monitor the FMS CDI deflection and centering rate to control the point where it will make the final bank to roll out on course. This is similar to how the autopilot intercepts a localizer. This change being incorporated into the sim CRJ, should result in a significant improvement in intercepting a new course in LNAV mode, without the constant banking seen now. Even the real CRJ may have to make one or two corrective banks once established on a new course to acquire the correct wind correction angle, but that is different than the long series of turns that currently can happen.
  7. There is also an STC which can give a CRJ the ability to fly an LPV approach with a GPS-derived vertical glide path. I do not think this is common in the airlines, as the modification is rather expensive, requiring new GPS receivers and hardware and software modifications to the FMS. It is only applicable to the WAAS system used in the USA - not the SBAS system used in Europe. The three corporate CRJ-200s I work on have the LPV mod.
  8. We are aware of this bug and what is causing it, but it will require another CRJ update to fix it. In SU5, MSFS is now using a more accurate way to calculate pressure altitude, and that will require a change at our end in how the CRJ processes Mach and IAS. The problem will not occur if you fly with the clear sky weather preset, but will be seen (to a greater or lesser degree) when Live Weather is active. I cannot give an ETA for the next CRJ update.
  9. As CRJay explained, as long as the bleed air selector is in “auto”, the isolation valve will operate automatically. The bleed air system on the CRJ 700/900/1000 is an improvement over the older CRJ-200, where the pilots have to manage bleed air manually. On that aircraft, if the isolation valve is closed, you would not be able to run the right air conditioning pack on the ground, nor start the right engine. The other thing that the automatic bleed air system does is to manage the main engine bleed valves. These must remain closed until the engines are running. If they are open (prior to engine start) the engine starter will not engage. As long as you keep the main bleed air switch in the auto position, all valves will open and close in the proper sequence.
  10. The CRJ can definitely fly a standard RNAV approach. However the real CRJ is not capable of flying an RNP RNAV approach, and such approaches do not even appear in the FMS database of the real aircraft. Flying these types of approaches requires FMS and autopilot functions that neither the real (nor simulated) CRJ has. RNP approaches do appear in the FMS of the sim version of the CRJ. At this time, there is no way to filter them out of the approach database as is done in the real aircraft. The aircraft might follow a very simple RNP approach, but if there are multiple RF legs in the procedure, it will almost certainly fail to track correctly. If you see the letters “RNP” in the approach procedure name in the FMS or on the approach chart, “proceed with caution” and at your own risk.
  11. I have very rarely seen this happen, but never for an obvious reason. What was the elevation of your departure airport?
  12. We are testing a potential solution to this issue.
  13. This is definitely fixed in the update. It is a long-standing bug, which actually had a very simple cause. Both the pack lights and “pack off” CAS message will now correctly illuminate any time the packs are off, regardless of engine state (running vs. not running)
  14. JRBarrett

    Minus 125

    At that temperature, the supply duct would begin creating solid carbon dioxide (dry ice)! Definitely a bug.
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