But the master schedule here says April 28,
Since this mission will use Soyuz 2-1A, the implication is that the payload fairing would be maintained for about an extra minute, or else the Progress will carry more cargo than normal, it would be interesting to see which approach would be taken for this launch,
So there is only one contract for four rockets at the moment.
The tender for four 2-1A rockets was raised in July 2012, contract signed August 2012.
1st delivery was scheduled for June 2014, for the launch of Progress-MS № 432, scheduled for launch in October 2014.
http://www.zakupki.gov.ru/pgz/public/action/orders/info/events_journal/show?notificationId=3885879
So any earlier possible use of 2-1A is incorrect?
Yes. You can do us a favor and calculate the increased cost of using 2-1A vs Soyuz-U for Progress, to see if there is a significant difference. We could then figure out the launch cost of flying the additional 400 kg of payload.
2014 - Soyuz-U 685,047,000 ruble - Soyuz-FG 742,880,000 ruble - Soyuz-2-1A 0,939,502,000 ruble
2015 - Soyuz-U 737,558,000 ruble - Soyuz-FG 799,466,000 ruble - Soyuz-2-1A 1,019,087,000 ruble
http://www.zakupki.gov.ru/pgz/public/action/orders/info/common_info/show?notificationId=3194165
http://forum.nasaspaceflight.com/index.php?topic=17286.msg1052136#msg1052136
A transfer compartment was docked with Progress M-27M cargo vehicle
April 21, 2015
At Baikonur launch site the preparations continue for the launch of Progress M-27M cargo vehicle under the International Space Station program.
Progress M-27M transport cargo vehicle was docked with the transfer compartment in the Spacecraft Assembly and Testing Facility.
http://www.energia.ru/en/iss/iss43/progress_m-27m/photo_04-21.html
A transfer compartment was docked with Progress M-27M cargo vehicle
April 21, 2015
At Baikonur launch site the preparations continue for the launch of Progress M-27M cargo vehicle under the International Space Station program.
Progress M-27M transport cargo vehicle was docked with the transfer compartment in the Spacecraft Assembly and Testing Facility.
http://www.energia.ru/en/iss/iss43/progress_m-27m/photo_04-21.htmlCool the next few fairing and Soyuz are flying 70 Anniversary seal and flags
A transfer compartment was docked with Progress M-27M cargo vehicle
April 21, 2015
At Baikonur launch site the preparations continue for the launch of Progress M-27M cargo vehicle under the International Space Station program.
Progress M-27M transport cargo vehicle was docked with the transfer compartment in the Spacecraft Assembly and Testing Facility.
http://www.energia.ru/en/iss/iss43/progress_m-27m/photo_04-21.htmlCool the next few fairing and Soyuz are flying 70 Anniversary seal and flags
What is the anniversary occasion? May 9--Victory Day?