![]() The main change in this new M-4 was an entirely new 'stretched' wing which spanned 1.47m more than the 12.09m of the earlier types, and lacked the cut-out in the trailing edge of the upper 'Dutch' Kindelberger, then redesigned the M-3 with the aim of doubling its payload. Western's machines had a red and silver paint scheme. The M-3s differed only in detail from the M-2s, sporting an overall aluminium finish with US Air Mail emblazoned in black on the fuselage sides and on the undersurfaces of the lower wing. Provision was also made for quick conversion of the freight section to permit carriage of a passenger in place of mail.Ī month before Western Air Express inaugurated its Los Angeles-Salt Lake City service in April 1926, the US Post Office ordered 50 of the M-3 version for its major routes. Designated M-2, they differed from the M-1 mainly by replacement of the original tunnel radiator with a frontal type. With the introduction of Contract Air Mail (CAM) routes, however, the newly formed Western Air Express Company (later Western Airlines) ordered six Douglas mailplanes. The M-1 was adjudged successful, but no production order was received by Douglas. ![]() During tests, extended exhaust piping was installed to keep fumes away from the pilot. The M-1 was a straightforward conversion of the O-2, with the forward cockpit covered in sheet aluminium to form a reinforced mail compartment with access through two deck hatches, the pilot being located in what was formerly the rear (observer's) cockpit in the O-2. It had twice the payload of the DH-4, but made use of the same tried and tested Liberty engine, of which large numbers were in store and readily available. The Douglas DAM-1 (Douglas Air Mail-One), quickly shortened to M-1, was test flown during the spring of 1925. A decision was thus made to order a conversion of the Douglas O-2 observation biplane, which had been ordered into quantity production for the US Army. That applies both to activating a given account, and to turning on Mailplane’s feature for notifying you of new messages.The US Post Office Department had been responsible for US internal air mail routes from 1918 onwards, and by 1925 the various types of DH-4 biplane which had been primary equipment since inception of the service were worn out. If you’re using Google’s two-factor authentication, you won’t have to create an aggravating application-specific password, but you will have to enter a code that Google sends to your smartphone. Setup is quick and fairly painless: You just enter the username and password for each account. Mailplane3 now integrates with Google Calendar, too. When you need to upload an attachment, Mailplane offers to resize images from your Mac in small, medium, or large formats before you send them. You can use QuickLook to preview files right in this window, or click the “view” link next to an attachment someone’s sent you. For example, I searched in vain for a way to send calendar items to and from iCal.Ī Safari-style Downloads window lets you keep track of attached files you’ve retrieved from your mail. However, though it works well on its own, Google Calendar in Mailplane 3 doesn’t seem to be as closely tied to the rest of your Mac as Gmail is. Mailplane 3 adds support for Google Calendar in those tabs, as well, so that you can view your appointments as easily as your inbox. ![]() Mailplane 3’s refinements on that feature set include a tabbed interface: Instead of switching clunkily between one account and the next, you can work with as many Gmail accounts as you like simultaneously, each in its own tab within the Mailplane window.
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