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Taxiing With The Thrust Reversers Out?  
User currently offlinePilottim747 From United States of America, joined Jul 2001, 1607 posts, RR: 5
Posted (10 years 5 months 3 weeks 2 days 1 hour ago) and read 3180 times:

I was looking at my friend's website, www.airplanephotozone.com, and I noticed a photo taken of an ERJ-145 taxiing with its thrust reversers out. This seems quite unusual. It's clearly taxiing, not landing, because MSPs Runway 30R is seen directly behind the aircraft. Has anyone spotted this before? Any ideas on why a pilot would do that (or if it was intentional)?



pilottim747
www.mspupdate.com


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11 replies: All unread, jump to last
 
User currently offlineLVZXV From Gabon, joined Mar 2004, 2041 posts, RR: 36
Reply 1, posted (10 years 5 months 3 weeks 2 days 1 hour ago) and read 3077 times:

My guess is the pilot took one of the slipways off the runway, hasn't bled off all his speed, and is simply freewheeling i.e. making use of the speed he has so as not to use more power while taxiing. I'm sure he disengaged the reversers very shortly after this shot was taken, unless he was rolling really fast! I've seen it done before on 732s, as well as taxiing almost as far as the gate with spoilers still extended and flaps fully down. No harm done, although it is standard procedure to "clean up" once below flying speed. Once off the runway, the wheel brakes are the most effective form of braking, although reversers could be used in emergency (if taxiing in a 3rd world airport with thick fog and all of the sudden you realise your taxiway gives way to the sea or something!).

XV




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User currently offlinePilottim747 From United States of America, joined Jul 2001, 1607 posts, RR: 5
Reply 2, posted (10 years 5 months 3 weeks 2 days 1 hour ago) and read 3022 times:

LVZXV, I should've mentioned that this plane is actually taxiing from the gate to takeoff. There's a photo, also on the website, that was taken maybe 30 seconds before with this plane taxing by but there are no thrust reversers out.

pilottim747



Aviation Photographers & Enthusiasts--Coordinate your life.
User currently offlineNW747-400 From United States of America, joined Jun 1999, 502 posts, RR: 0
Reply 3, posted (10 years 5 months 3 weeks 2 days ago) and read 2941 times:

I have met several biz jet pilots that use the reverse thrust to slow down during taxi...they put in power for a brisk taxi and then engage reverse thrust to slow down instead of putting wear on the brakes.

User currently offlineAR385 From Mexico, joined Nov 2003, 6217 posts, RR: 30
Reply 4, posted (10 years 5 months 3 weeks 2 days ago) and read 2937 times:
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Pilottim747,

If the case is what you said on reply 2, then my guess is the plane is at maximum takeoff weight, the pilot accelerated too fast and now needs to slow down, but does not want to heat the brakes as he will soon be taking off at max weight, so he is using the reversers to slow down.


User currently offlinePilottim747 From United States of America, joined Jul 2001, 1607 posts, RR: 5
Reply 5, posted (10 years 5 months 3 weeks 2 days ago) and read 2919 times:

AR35, you're scenario is definitely possible. The ERJ-145 was operating CO Ex, MSP-EWR. It probably had full fuel and definitely could've been a full flight of pax.

I'm guessing that this would only work with smaller jets, am I right? Anyone else seen this before? And if so, what aircraft was it?

pilottim747



Aviation Photographers & Enthusiasts--Coordinate your life.
User currently offlineRB211LTN From United Kingdom, joined Mar 2004, 133 posts, RR: 0
Reply 6, posted (10 years 5 months 3 weeks 1 day 23 hours ago) and read 2868 times:

As LVZXV mentions, I've seen this done on the 737-200. When we had then at easyJet, some of the pilots would use them at LTN when we were on the downhill run from the runway to the apron. On more than one occasion I had alarmed passengers claiming that the engine had just 'come apart'.


The customer is always right.....unless he is a passenger!
User currently offlineFlyingbronco05 From United States of America, joined May 2002, 3840 posts, RR: 2
Reply 7, posted (10 years 5 months 3 weeks 1 day 18 hours ago) and read 2679 times:

Pilots in planes with rear mounted engines often engage a thrust reverser while taxiing as part of their checklist. It's only engaged a few seconds and only one is engaged at a time.

FB05

PS- You see a lot of business jets do this, too.



Never Trust Your Fuel Gauge
User currently offlineUSAFHummer From United States of America, joined May 2000, 10685 posts, RR: 52
Reply 8, posted (10 years 5 months 3 weeks 1 day 14 hours ago) and read 2498 times:

I saw this quite frequently when spotting at FLL recently, confused the heck out of me as well, thanks for the post and replies...

Greg



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User currently offlineJetguy From , joined Dec 1969, posts, RR:
Reply 9, posted (10 years 5 months 3 weeks 1 day 14 hours ago) and read 2494 times:

In most, if not all bizjets, there is a pre-takeoff check that tests the thrust reversers' ability to deploy and stow. Although many AFMs call for this check prior to each flight, it is not uncommon to only see it performed on the first flight of the day. It looks like the photographer took the picture just as the flightcrew was performing the test. FYI, the test is normally performed on both T/Rs simultaneously.

In some aircraft, it is also possible to taxi with one or both T/Rs deployed to minimize the speed build-up. However, it's not always possible to do this because of deployment time and cycle limitations.
Jetguy


User currently offlineRaybolt From United States of America, joined Oct 2001, 255 posts, RR: 1
Reply 10, posted (10 years 5 months 3 weeks 1 day 13 hours ago) and read 2437 times:

Yeah, I have also seen this done many times w/ bizjets. The airport I did my private training (BLM) at had a decent amount of bizjet activity, and this could be seen quite often.

Dan



You can't join the MHC on the ground.
User currently offlineA3204eva From United Kingdom, joined Feb 2004, 1060 posts, RR: 5
Reply 11, posted (10 years 5 months 3 weeks 1 day 13 hours ago) and read 2414 times:

I have seen this before. It's to keep the taxiing speed without the use of brakes.

A3204eva Smile



"They have lady pilots......... they're not that good, but they have 'em"
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