SELECT date FROM table_name_97 WHERE type = "mi-10r" AND record_description = "altitude with kg (lb) payload" AND pilot = "g.v. alfyorov"
Jenis MI-10R, dan deskripsi rekor ketinggian dengan muatan KG (LB), dan pilot G.V.Alfyorov adalah tanggal berapa?
CREATE TABLE table_name_97 (date VARCHAR, pilot VARCHAR, type VARCHAR, record_description VARCHAR)