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Rough Field Deflector  
User currently offlineNicolaki From , joined Dec 1969, posts, RR:
Posted (15 years 10 months 2 weeks 19 hours ago) and read 1562 times:

Good evening guys,
This morning I was spotting at YUL, when this 737-200 lanuched himself. As he got airborne I noticed something I've never seen before on any aircraft. It's a flat metalic plate located aft of the front gear. I tried to look for an answer but the only thing I could find was that it is called a "Rough field deflector". Could somebody please enlight me on it's usage, the way it works, how is it stored when the gear is up?

Thanks a lot

Nicolas @ YUL

5 replies: All unread, jump to last
User currently offlineNicolaki From , joined Dec 1969, posts, RR:
Reply 1, posted (15 years 10 months 2 weeks 19 hours ago) and read 1445 times:

Oh here's a pic of it.

Click for large version
Click here for full size photo!

Photo © Brian Hill

User currently offlineUAL_Bagsmasher From , joined Dec 1969, posts, RR:
Reply 2, posted (15 years 10 months 2 weeks 18 hours ago) and read 1444 times:

I think the deflector is there to prevent stones and other debris from being kicked up by the nosegear and entering the engines.

User currently offlineAvt007 From Canada, joined Jul 2000, 2132 posts, RR: 4
Reply 3, posted (15 years 10 months 2 weeks 12 hours ago) and read 1433 times:

It is part of a gravel kit, for operating off dirt strips. It protects the belly from rock damage. Note also below each engine intake is a mast, or probe. These blow bleed air ( compressed engine air) to deflect any debris from being ingested into the engine. First Air flies up north a lot. You'll also see this on some Canadian 737s, the old Canadian North machines. They also have a cargo door.

User currently offlineL-188 From United States of America, joined Jul 1999, 30408 posts, RR: 57
Reply 4, posted (15 years 10 months 2 weeks 8 hours ago) and read 1422 times:

Most of Alaska Airlines 737-200QC's are also equipted with the gravel kit...This is why Alaska will be getting rid of their MD-80' long before the -200's are gone.

User currently offlineAC183 From Canada, joined Jul 1999, 1532 posts, RR: 2
Reply 5, posted (15 years 10 months 2 weeks 5 hours ago) and read 1417 times:

It's for deflecting debris on gravel runways in the arctic, it keeps rocks out of the engine and off the fuselage. You see them on First Air aircraft as they're an arctic operator. They're also on, as noted, Canadi>n North's 737's and on several of Candi>n's 737's that used to fly the northern combi runs, or came from the mergers with Nordair, Transair, and from the aircraft used on Pacific Western's northern operations.

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