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Re: [OM] IMG: B-25 from the Archives

Subject: Re: [OM] IMG: B-25 from the Archives
From: Ken Norton <ken@xxxxxxxxxxx>
Date: Fri, 11 Dec 2015 09:09:32 -0600
>   Thanks for posting, Chuck, although my stomach is a bit queasy just
> watching those ships pitch and roll. What really strikes me is how slow
> those B-25's appear to be going when they take off. I know they had a good
> headwind combined with the ship's headway, but they appear to be traveling
> about 30 mph relative to the ship. Years ago I saw one take off at the
> Geneva Airshow and I came away with the same impression. The plane looked
> like it was traveling about 40-50 mph when the wheels left the ground.

The B-25 was unique in that it had two distinct stall speeds. One with
the engines going and one without. When the engines were cranked up to
maximum take-off power, they could get off the ground right around 70
mph with all the prop-wash flowing over the wing. So, if the ship was
was under full steam into the wind, you might have 35 mph coming down
the flight deck. The airplane only needs to pick up another 35 mph to
get off the ground.

The problem was that if you had an engine failure before you got above
engine-out stall speed, your flight was done. Normal stall speed was
like another 40 mph faster.

AG
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