Jul 25, 2021 · I have read that for most planes Vmo (maximum operating speed) is the limitation below 25000ft and Mmo (maximum operating Mach number) is the limitation above 25000ft. Is it correct to say this and...

Jul 21, 2015 · VMO V M O is a “maximum operating speed”. It is one of many “ V-speeds ” defined for an aircraft that limit operation at various flight phases. All V-speeds are indicated airspeeds ¹. The VMO V M O is the maximum permitted speed for the aircraft. This includes a safety margin, so pilots can reasonably fly near that speed. Exceeding it is not immediately …

Nov 4, 2016 · But because instruments in aircraft only show indicated airspeed, there is instead a table or graph showing decreasing VMO V M O with altitude. In modern aircraft, the table is built into the flight management system, so the VMO V M O for current altitude is shown on the airspeed indicator and the alarm is sounded when it is exceeded.

Apr 23, 2018 · An attempt to maintain MMO/VMO in a spiral dive turn would probably end poorly. If you are diving straight at VMO, spoilers out, and want to get down faster, depending on the airplane you might get a faster descent by slowing to gear extension speed and extending the gear, but I don't think most manufacturers recommend that and it's not ...

Turbulence Penetration Speed is Vb. Vno is Normal Operating and is similar to Vb but seems to be applied only to non-transport a/c. Transport a/c have Va, Vb and Vmo.

Jan 16, 2024 · Autopilot to speed mode, and dial the speed bug to Vmo/Mmo, unless you suspect structural damage (such as from a frightening bang coming from the back), in which case you set the speed bug to current speed. If you have in-flight deployable speed brakes/spoilers that are good to operate at Vmo/Mmo, fully out to increase the descent rate.

Nov 9, 2018 · I suspect the reasoning was that SRS mode implies you are pretty low on altitude, and you do not desire an automatic (and uncommanded) reduction of thrust on, say, a windshear. Of course, in this particular case the high speed prot will activate at VMO/MMO so if you manage to get that fast while still in SRS you have bigger problems than the thrust

VMO and MMO are fix values independent of altitude. VMO is given in IAS. You can convert MMO to an airspeed based on altitude, but really they are two independent limits, and whichever limit is lower at your altitude must be observed. Your max cruise speed data only makes sense if a TAS; converting it to a Mach number at the given cruise altitude reveals it is the same as MMO …

Sep 12, 2016 · It is exactly as pericynthion says. VD is one of the so called design speeds defined at design time. Many of the structural/aeroelastic characteristics have to be demonstrated at speeds up to VD during flight test. However VD is for certification flight testing only. Normal operation is limited to VNE. However VNE is for light aircraft only. Larger aircraft have VMO …

Aug 20, 2020 · My experience was on the Regional Jets but from sim training I recall that the pitch down once at Vmo with flight spoilers extended was somewhere around 10-15 deg. The standard procedure for the CRJ was to declare "emergency descent", slam the thrust levers to idle, flight spoilers fully out, dial the Autopilot altitude preselect to 10000 ft, select the Autopilot to Speed …