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Newsgroups: alt.binaries.pictures.aviation
Subject: Re: US 1942-023894 C-47A to USN 12443 R4D-8 USNColl.jpg
From: Andrew Chaplin <ab.chaplin@yourfinger.rogers.com>
References: <e51ahch61dlj058ag1iskgd1n96phpkdkg@4ax.com> <XnsA77493D7DDA6AHortenzyFortensnort@216.166.97.131> <of886u02i3j@drn.newsguy.com>
Organization: Not if I can help it.
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Miloch <Miloch_member@newsguy.com> wrote in
news:of886u02i3j@drn.newsguy.com:
> In article <XnsA77493D7DDA6AHortenzyFortensnort@216.166.97.131>, Andrew
> Chaplin says...
>>
>>joet5 <joet5@optonline.net> wrote in
>>news:e51ahch61dlj058ag1iskgd1n96phpkdkg@4ax.com:
>>
>>>
>>> begin 644 US 1942-023894 C-47A to USN 12443 R4D-8 USNColl.jpg
>>>
>>> Attachment decoded: US 1942-023894 C-47A to USN 12443 R4D-8
>>> USNColl.jpg `
>>> end
>>
>>What advantages did the modified tail of the USN DC-3 produce?
>
> "Both the vertical and horizontal tail surfaces were enlarged, and
> given square tips, improving the single-engine performance of the
> aircraft."
>
> Douglas R4D-8 (Super DC-3)
>
> http://www.historyofwar.org/articles/weapons_douglas_R4D-8.html
>
> "The Douglas R4D-8 emerged from an unsuccessful attempt by Douglas to
> extend the commercial lifespan of the aging DC-3. At the end of the
> Second World War a vast number of DC-3s, C-47s, C-53s and Dakotas
> flooded onto the commercial market, but by the end of the 1940s many of
> these aircraft were threatened by increasingly strict Civil Air
> Regulations in the United States, and the looming expiry of their
> airworthiness certificates in 1952.
>
> "Douglas responded by developing a modified version of the DC-3, the
> DC-3S or Super DC-3, which could be produced by upgrading existing
> aircraft. The new aircraft had a stronger longer fuselage, with room
> for 30 passengers. The passenger door was moved forward, and the door
> itself could be used as the boarding stairs. Both the vertical and
> horizontal tail surfaces were enlarged, and given square tips,
> improving the single-engine performance of the aircraft. The engine
> nacelles were modified so that they could carry either 1,475hp Wright
> Cyclone engines or 1,450hp Pratt & Whitney R-200-D7 radial engines, and
> to allow the wheels to be fully enclosed. Finally the outer panels of
> the wing were shortened, and 4 degrees of sweepback was added to the
> trailing edges.
Thank you.
--
Andrew Chaplin
SIT MIHI GLADIUS SICUT SANCTO MARTINO
(If you're going to e-mail me, you'll have to get "yourfinger." out.)
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