At altitude, your indicated airspeed is not your true airspeed and appears much lower.
AAU = Aircraft & Avionics Update.
CRU = Cruise. Set this via the throttle.
FLC isnât going to help you in cruise. Itâs job is to adjust pitch as needed to maintain an airspeed / mach number in a climb. The CJ4 doesnât have an autothrottle. While in cruise set it in the CRU band. If you find the aircraft overspeeding you can bring the throttle back while remaining in the CRU band.
Gotcha. So thereâs no preventing the overspeed warning.
Must be an annoying aircraft to fly IRL especially if you have an itchy right hand⊠Lol
Itâs pretty easy not to overspeed. With the throttle set to cruise it will tuck up right under the red tape on the airspeed indicator. At most you may need a minor correction once or twice. I just did a flight in it and didnât have any issues.
1 Like
The thing with me is Iâm used to taking off at full throttle and trying to climb as quickly as I can.
However, at times I just want to cruise between 3k and 5k feet to admire the photogrammetry and the jet insists on hitting the overspeed warning even though my throttles are at around 60% probably less
It settled around 250 knots at roughly 3,000 ASL.
1 Like
Itâs not built for high performance I guess. I can hit higher speeds in turbo props at the same altitude without them sounding the overspeed alarm.
My test was flawed. I realized I had the gear out which created drag. It will overspeed if set at the CRU setting at such a low altitude. Anyway the CRU setting in the CJ4 isnât designed with cruising at such a low altitude in mind. If you cruise in the mid 20s to mid 40s it should work just fine. Your airspeed should settle right under the red tape on the airspeed indicator.
Correct. The CJ4 and similar jets are designed to be like a mini-airliner to ferry passengers back and forth in comfort. It is not designed to takeoff and achieve space shuttle status at full throttle up to your cruising altitude. The sim is designed to have the various aircraft perform similar to their real world counterparts, and the AAU update that was applied a while back further increased the realism to this jet. When you start to exceed the real world limits, such as violating the 250kts speed restriction below 10k ft, the CJ4 responds with an over speed warning, presumably just like the real world version would.
That may very well be the case, but you would still technically be in an overspeed state according to the sim programming. The only difference is those aircraft donât have programming to alert you when you do so.
Like I mentioned earlier, the overspeed warning you are getting is due to the sub-10k ft. speed limit being violated. I donât think there is a way to disable that in the sim settings, but maybe there is something in the realism settings Iâm not remembering off hand. Otherwise youâll either have to learn to accept it on the CJ4, or fly something else more compatible with your desire for low altitude high speed runs.
1 Like
Well, if one hangs around the Working Title Discord, youâll run into a current CJ driver on their team. He aptly describes the jet as rocket powered, especially on takeoff. Itâs not unusual to immediately run into an over speed situation on takeoff roll and initial climb out because itâs relatively overpowered in that lower altitude regime. Iâve done it myself which is why I back off a couple of percentage points on T/O so I can manage power easier while doing everything else during Departure.
2 Likes
Like the other guy said it violates the 250kt cap at under 10k feet too easily even though the IAS is nowhere near the red and white tapes.
Just pull the power back. Itâs not hard to keep it under 250 knots.
I mean if you want to go fast, you can. ATC in the game wonât make you call the FSDO if youâre over the speed limit. Gameplay wise, sure. But if you want to get somewhere fast and not have to manage the throttle too much, lots of options that are simpler to fly and have an autothrotlle that you can manually override to greater than 250 without over speeding.
1 Like
The overspeed alarms represent the certification limits of the actual real life aircraft. From the operators guide:
These limits are generally derived by the maximum speed at which a foreign object strike would be survivable in the airframe, and other legal design certification constraints. They are not intended to indicate a maximum achievable speed. The CJ4 performance in the sim matches the performance of the real aircraft, and yes, you do need to watch your N1 if you are low and level.
The speed limits are correctly indicated if you are using the instruments inside the cockpit. If you are using the external view instruments, unfortunately the ones provided by the sim are not able to show dynamic speed limits (different speed limits for different conditions/altitudes), and so may not be accurate in all cases.
4 Likes
Thanks for the correction.
When I lost track of time and forgot I had configured the plane to descend on VNAV from FL410 to 2000ft, I was very thankful aircraft stress damage wasnât in effect. Level at 2000 feet with throttles over 90% will wear out your over-speed speaker 
Unfortunately, no it wonât. Lol
Dude, what are you talking about⊠Nobody, âIRLâ, flies thIS plane at 3-5k ftâŠ
1 Like
Hello brothers, I fly this jet on xbox and whenever it is round 50nm from airport it loses its gps and line disappears and I tried everything but it doesnt work and loses track
Can you clarify this?
Are you saying the GPS line was there at the start of the route and later disappears?
OrâŠ
Are you saying you created the route and the line simply doesnât complete during the initial route execution?