Sikorsky S-30 Naval Bomber/Transport Seaplane Project

[hesham]

Hi,

the Sikorsky S-30 was twin engined light military naval bomber and had a version as
a commercial transport seaplane,in biplane configuration with twin float,remianed a
project only.

http://www.sikorskyarchives.com/pdf/News%20APRIL%202012.pdf

 

[Stargazer]

The design you are showing appears to have been designated S-30-B by Igor Sikorsky.

The earlier S-30 was a rather different type (despite a few common features), as shown in the attachments. Here is some info I managed to find in 2012 on this rare bird:

Type of plane: Twin-motored Sikorsky S-30 (see specifications attached); construction American (manufactured at Westbury, Long Island).
Horsepower: Two 200 horsepower Whirlwind engines, air-cooled, total, 400 horsepower, each plane.
Speed: Cruising, 100 miles per hour. Cruising radius: 400 miles.
Number of motors: Two using Sikorsky patented compensating rudder device, permitting of flight with full load on one motor alone.

The S-30 is an all-metal fabric covered light mail transport, designed especially for this work and having all the good characteristics of the 29-A, already flown by this company successfully many flights in various parts of the country on special missions and on schedule.

The type of plane proposed to be used on these routes permits of carrying freight and passengers as well as air mail, at the discretion of the operators, but giving a specific priority to the mail offered, which latter is to be carried in a special fireproof compartment away from the engines and gas tanks.

It is intended by the company, as specified in the pending advertisement, to furnish, install, and operate all aids to aerial navigation, ground organization, night lighting and emergency fields and landing beacons, with the understanding, as also specified, that the Government air mail fields lying along the route will be open to the company for landing and taking off to discharge and load its cargo other than air mail.

We propose to furnish the equipment specified below for the first proposal of the four routes being operated together by this company and as a single unit:
Number of planes: 11, of which number 6, will be in use daily on the trips contemplated by the contract to be executed pursuant to this proposal and 5 held in reserve.

Should this company not be allowed all four lines, but is allowed one or more thereof, as set out in the second schedule foregoing, it will not have 11 machines as above indicated, but will have a due and proportionate number of planes.

 

[hesham]

Thank you my dear Skyblazer for your explanation,


and what is your source about the first drawing.

 

[Stargazer]

and what is your source about the first drawing.

It's from a Russian publication, but I can't remember which one.

 

[hesham]

OK my dear Skyblazer.