Slightly off-topic but do Carbon multi disc brakes have negative expansion coefficient?
Like do the wear indicating pins come slightly out when brakes are cooled off?
Not sure how to phrase the question - but is a Boeing 787 or Airbus A321 without the airline customers configuration of seats, etc., perfectly balanced 50/50? If you were to draw a line down the middle of the plane, would both sides be equal in weight? Whether an Aircraft is loaded or no it always ...Jump to post
Is there not also something about the turbine bearing seals not fully pressurizing at low RPM and thus aircraft that tend to have longer than normal taxiing can end up with higher oil consumption? Correct. But this holds true for Labyrinth seals. Almost all modern engines use Carbon seals which hav...Jump to post
Regarding the CFM56-5C, there was a thread a while back where it got brought up: viewtopic.php?p=23286961
GalaxyFlyer wrote:Golly, you should see PW engines, if you want to see oil consumption.
I have flown aircraft where the landing lights were at the wing root or adjacent to the main landing gear (Boeing/Airbus) as well as at the wingtip (McDonnell Douglas) and to be honest, I couldn't tell much difference in the scope of illumination. e38 True. Look at B737MAX, All the lights in the wi...Jump to post
Had a quick question - when it comes to commercial airliners and the pre-departure walk around how do you assess whether there are any issues with the top of the aircraft? Transit/Preflight checks are approved for a check of the aircraft from the ground as far as the eye can see and follow a partic...Jump to post
^This. The longer fuselage and location of CG puts less weight on the nose of a longer aircraft.
Thanks CanadianNorth & m1m2.
Looks like Nose wheel on A321 carries a bit less load than the A320.
But what difference would it make if we keep the same pressure for Nose wheel on longer jets. Won't it ensure fleet commonality?
Any idea the trend on widebody families like A332/333 and B772/773?
At the company I work for we maintain following Tire Pressures on the A32X Family Aircrafts. A320 - NLG 178 to 187 & MLG 200 to 210. A321 - NLG 168 to 177 & MLG 212 to 222. While I do understand the increase in MLG Tire pressure on A321 due to the obvious load increase, I could not find any ...Jump to post
ISI : Mainly for operators, there is no particular template. TFU: Made to describe a specific technical issue, from Background description to Final Solution (with mitigation and recommendations inbetween) Thanks LD!! Just came across this text from one of the Airbus OIT- 3.2 FEATURES SPECIFIC TO TF...Jump to post
It’s a neat little area to “hang out” in lol. Haha..The ATR Aft cargo compartment can also be a good area to hang out depending on the situation.. It is also noteworthy that carrying DGs is prohibited on the Pax ATR Cargo compartment as although physically separated, they fall in same level and onl...Jump to post
No It's not
airportugal310 wrote:I believe the official term is "abradable lining/liner" but could be wrong
The answer to this is it depends upon the specific aircraft model and which surfaces. The 744 flaps, as referenced in the OP would be a great start. Flaps generally are position specific ie. have discrete outputs per the Flap lever Position in the Flight deck. Primary control surfaces like the Aile...Jump to post
A couple of tragedies occurred when all hydraulic fluid was lost. Japan Air 747 and United DC-10. Do all commercial types use hydraulic fuses or just some? What other systems are there to prevent the complete loss of hydraulic fluid after a catastrophic failure? Every Hydraulic system on an Aircraf...Jump to post
Does an A320 With V2500 idle at a different speed with just the left engine running (single engine taxi)? Earlier procedure on A320 was to start Engine 2 first as it is directly connected to Yellow EDP which supplies the Parking Brake pressure. Now the procedure has been revised to simplify procedu...Jump to post
Stranger still was the Lockheed Constellation, which as well as having a forward angled nose gear, had considerable 'camber' on the nose wheel axles - meaning that the wheels were angled so that the bottoms of the tires where closer together than the tops. Perhaps this was to counteract to some ext...Jump to post
Problem with the canted nose gear design is it completely lifts the outboard nose wheel off the ground in a tight turn while taxiing, now you’re steering with just one wheel, not so good, especially when you have a wet surface Correct. Tight turns mostly are done at lower speeds. A320 Family can al...Jump to post
Adding to above replies Volcanic ash is also very abrasive which resulted in a flame out of engine long back. Forest smoke may be chemically toxic in the long run but a few seconds of ingestion is pretty okay for the engine. The Aircrafts may be shutting off the bleed when they fly over a smoke clou...Jump to post
Can I ask a dumb question? I've never seen an air conditioning hose that didn't have a fold or kink in it. Are they not actually *designed* to be that way? Actually they do. You just cant notice it when it is supplying High Volume Air as it becomes inflated. However old hoses do leak from areas whe...Jump to post
Florianopolis wrote:Could it be because the battery has less juice at lower temperatures?
r6russian wrote:oldannyboy wrote:Oh and the whine of a spooling up RB211 naturally!!! .
everybody knows that theres no better sound in aviation than the RB211 spooling up
Engine manufacturers sometimes test their engines by replacing one of the regular engines on a quad. That's strictly for test purposes only, though. 0744433 Nice center gear, there... Hehe, Very observant! Looks like Airbus permanently deactivated Centre gear on this one as this bird might never lo...Jump to post
2395511047 wrote:Does anyone know the meaning of this "hook" "2" symbol found on an A320 (and other airbus models) wing and sometimes vertical stabilizer?
Some cargo doors are outward opening plug type. The aft small cargo door (70") on the B777 for example is an outward opening plug type door (and I'm pretty sure it's the same on the B767). The forward large cargo door (106") and aft large cargo door (106", if installed) are non-plug ...Jump to post
What about the outer wing tanks? Do the post-2014 A319/A320 and A319neo/A320neo aircraft also have a single wing tank like the A321s? Single wing tank like the 321 would have been great. The 321 wing has a slightly thicker skin crossection and construction hence it could get away with No Outer Tank...Jump to post
I would think that, while your idea might sound interesting, there are likely the following drawbacks: - Aircraft compatibility. Traditional tug need to connect to different aircraft by the means of different bars. Some exotic aircraft even need to carry their own tow bar in order to get pushed. - ...Jump to post
Sokes wrote:I don't know if 6000 hours is o.k., bad or very bad. Anybody has some comparisons, e.g. to Trents or GE90?
What about IAE V2500?
I remember when AA used TRs for “pullback” on the MD80s at DFW. The sequence would start with a momentary forward motion, then you’d hear the TRs engage before starting your pullback. Except for the slight forward motion, it was pretty cool. It was called Powerback. Saved a few minutes of time but ...Jump to post